Antenna of triple polarisation with dipoles of cloverleaf type

FIELD: physics, radio.

SUBSTANCE: invention is related to antenna device, which comprises facility for provision of approximation of electric circuit of DC, which is arranged for provision of the first practically toroidal directional pattern, at that antenna device comprises the first and second electric dipoles, which are installed substantially orthogonally to each other and are arranged to provide for the second and third substantially toroidal directional patterns, every of which is substantially orthogonal to the other one and to the first substantially toroidal directional pattern. Facility for approximation of DC electric circuit comprises at least two parts of current tracks, in which current (I1, I2, I3, I4) may be supplied to every of mentioned parts, so that currents (I1, I2, I3, I4) in each of mentioned parts are practically cophased to each other.

EFFECT: development of antenna device that comprises facility for provision of DC electric circuit approximation.

7 cl, 15 dwg

 

The technical field to which the invention relates

The present invention relates to an antenna device that contains a tool to provide an approximation of the electrical circuit DC, and this approximation electrical circuit DC is designed to provide the first essentially toroidal pattern, and the antenna device also includes first and second electric dipoles, which are arranged essentially orthogonal to each other and are designed to provide second and third essentially toroidal directional diagrams, each of which is essentially orthogonal to the other and to the first essentially toroidal direction diagram.

The level of technology

The need for wireless communication systems has grown steadily and continues to grow and in the process of growth passed several stages of technological development. To provide increased throughput of wireless systems through the use of uncorrelated paths distribution system MIMO (multiple inputs and multiple outputs) are considered as the preferred technology to improve throughput. The MIMO system uses multiple separate independent signal paths, for example, what redstem multiple transmitting and receiving antennas. The desired outcome is to have multiple uncorrelated antenna ports for reception and for transmission.

For MIMO systems, it is desirable to estimate the channel and continuously update this assessment. This update can be done via a continuous transmission of the so-called pilot signals are known in advance. Evaluation of channel network channel matrix. If multiple transmitting antennas TX transmit signals, the components of the vector of the transmitted signal to multiple receiving antennas Rx, all signals TX are summed in each of Rx antennas and using a linear combination is formed by the vector of the received signal. By multiplying the vector of the received signal on the inverted matrix of the channel in the channel introduces amendment to obtain the initial information, i.e. if the existing channel matrix is known, it is possible to get the exact vector of the transmitted signal. Thus, the channel matrix acts as a link between the antenna ports of the antenna TX and Rx, respectively. These matrices are of size M×N, where M is the number of inputs (antenna port) antenna TX and N is the number of outputs (antenna port) antenna Rx. It is known to experts in the field of MIMO systems.

In order MIMO system functioned effectively requires uncorrelated or at least practically uncorrelated per the data signals. The value of the expression "uncorrelated signals" in this context is that the pattern is almost orthogonal. This allows you to have one antenna, if the antenna is designed for reception and transmission, at least two orthogonal polarizations. If one antenna is supposed to use more than two orthogonal polarization, it is necessary that it was used in the so-called strongly scattering media, with many independent channels of distribution, because otherwise it is impossible to have the benefit of two or more orthogonal polarizations. It is believed that multiple-scattering environment is when a lot of electromagnetic waves coincide in one point of space. Therefore, in a highly scattering environment, you can use more than two orthogonal polarization, as many independent paths distribution provides all the degrees of freedom be used antenna.

Antennas for MIMO systems may use spatial separation, i.e. physical separation in order to achieve low correlation between received signals at the antenna ports. This, however, leads to large lattices, which are not suitable, for example, for a portable terminal. Another way to implement uncorrelated signals sostoi is in the division of polarization, i.e. generally in the transmission and reception of signals with orthogonal polarizations.

It was proposed to use three orthogonal dipole antenna MIMO with three ports, but this antenna is complicated to manufacture and requires a lot of space when used at higher frequencies, such as those used for the MIMO system (about 2 GHz).

In the application US 2002/0113748 revealed two preferably orthogonal dipole and the contour element. As shown in figure 5 of the above mentioned applications, the contour element is ring shaped and is powered at some point in that ring.

Since the diameter of the hinge element is proposed to make to one wavelength at the operating frequency, thereby indicates that the loop can be up to several wavelengths.

However, to obtain a pattern that is almost orthogonal diagrams of dipoles, with the help of an antenna device according to claim US 2002/0113748 one way is to use a small loop. This small loop should have a diameter of about a tenth of a wavelength at the operating frequency, which gives the approximation of the electric element loop DC. The use of electric loop DC or at least enough of its approximation is a primary way to get the pattern, which is almost regionalna charts dipoles.

Although it is not suggested explicitly in the application US 2002/0113748, this antenna with a small loop can be deduced from these documents. However, this antenna with a small loop is very usecodepage, and therefore difficult for proper alignment, because it has a high reactance and low resistance. Further, this antenna with a small loop is much less than the adjacent dipole antenna, which leads to awkward to use design.

Thus there is a problem with the antenna design for application US 2002/-113748, because the hinge element must be very small to function as a sufficient approximation of the hinge element DC.

The objective problem solved by the present invention is to provide an antenna device suitable for MIMO systems and is able to send and receive on three essentially uncorrelated polarizations, and this antenna device must contain two almost orthogonal dipole and the approximation of the element of an electric circuit DC. This approximation element of an electric circuit DC should be easy to be consistent and to have greater bandwidth compared with what can be derived from existing solutions.

The invention

This objective problem is solved by means of an antenna device of the above type, characterized in that the means for approximating electric circuit DC includes at least two parts of the current path, where the current can be applied to each of these parts, so that the current in each of these parts will be in phase with each other.

Preferred embodiments of disclosed in the dependent claims.

By the present invention achieves several advantages, for example:

- Get a cheap antenna device triple polarization.

- Triple antenna polarization, made in planar technology, avoids occupying a large space antenna systems.

- Get a triple antenna polarization, which is easy to manufacture.

Brief description of drawings

The present invention is described below in more detail with reference to the attached drawings, where:

Figure 1 shows four leaf antenna type clover leaf;

Figure 2 shows the ideal pattern for an electric circuit DC;

Figure 3 shows two orthogonal dipole antennas;

Figure 4 shows four leaf antenna type clover leaf with two orthogonal dipole antennas is AMI;

Figure 5 shows the ideal radiation pattern for a dipole antenna.

6 shows three orthogonal pattern;

7 shows a side view of an antenna device according to the invention realized by planar techniques;

Figa shows four leaf antenna type clover leaf, implemented planar methods;

Fig.8b shows two orthogonal dipole antennas implemented planar methods;

Figa shows how three shoulder vibrator are used to model the first electric dipole;

Fig.9b shows how three shoulder vibrator are used to model the second electric dipole;

Figa shows dipole device according to the first occasion of the first set;

Fig.10b shows dipole device according to the second occasion of the first set;

Figa shows dipole device according to the first occasion of the second set; and

Fig.11b shows dipole device according to the second occasion of the second set.

Preferred embodiments of the

According to the present invention proposes the so-called tri-mode antenna device. This tri-mode antenna device designed to transfer almost three orthogonal directional diagrams.

The so-called four-antenna type 1 clover leaf, which is already known, is used in the present invention and shown in figure 1. Four-antenna type 1 clover leaf contains the first 2 second 3 third 4 fourth 5 loops of conductive material, such as a bent copper wire, where the loops 2, 3, 4, 5 all for the most part lie in the same plane, the antenna plane P in the plane of the drawing in figure 1. Each loop 2, 3, 4, 5 passes from the supply conductor 6 with the supply port 7, the ground conductor 8, leading to the grounding 9; preferably, they are connected to the same supply conductor 6. Loops 2, 3, 4, 5 are preferably almost the same length and are located next to each other in the form of a symmetrical four leaf shapes, as shown in figure 1.

If you go around the first loop 2, it starts at the first point in 10 connection with food, where it comes into contact with the feeding conductor 6 passes clockwise and ends at the first point 11 connection to ground, where it is in contact with the grounding conductor 8. The second loop 3, located clockwise with respect to the first loop 2 starts at the first point 10 connection with food, where it comes into contact with the feeding conductor 6 passes clockwise and ends at the second point 2 connections to ground, where it is in contact with the grounding conductor 8.

The third loop 4, which is located clockwise relative to the second hinge 3, starts in the second point 13 connection with food, where it comes into contact with the feeding conductor 6 passes clockwise and ends at the second point 12 connection to ground, where it is in contact with the grounding conductor 8. The fourth loop 5, located clockwise relative to the third hinge 4, begins at the second point 13 connection with food, where it comes into contact with the feeding conductor 6 passes clockwise and ends at the first point 11 connection to ground, where it is in contact with the grounding conductor 8.

Each loop 2, 3, 4, 5 includes an arc portion 2A, 3A, 4A, 5A of the conductor and the first 2b, 3b, 4b, 5b and the second 2C, 3C, 4C, 5C direct conductive part. Direct conductive parts 2b, 2C of the first loop 2 will form the first 14 and second 15 parallel steam conductive part together with the adjacent straight conductive pieces 5C, 3b adjacent the fourth 5 and 3 second loops. Similarly formed third 16 and 17 fourth pair of parallel conductive parts. Arc conductive parts 2A, 3A, 4A, 5A are such that they together form an incomplete essentially annular conductive portion. The term "incomplete" means that the conductive ring h is here essentially torn between each arc conductive part 2A, 3A, 4A, 5A.

When all loops 2, 3, 4, 5 are powered from the same supply conductor 6, the currents I1, I2, I3, I4in each loop will be almost in phase with each other. In particular, each arc conductive parts 2A, 3A, 4A, 5A current I1, I2, I3, I4will be in-phase with the current I1, I2, I3, I4all other arc conductive parts 2A, 3A, 4A, 5A. Further, when the first parallel steam conductive part 14, the currents I1, I4in her direct conductive parts 2b, 5C flowing in opposite directions, settle each other. The corresponding condition applies to 15 second, third 16 and 17 fourth pair of parallel conductive parts.

This means that four-antenna type 1 clover leaf due to the overlapping of the loops 2, 3, 4, 5 actually represents an approximation of the conductive ring, where the current has the same phase around the ring. This means that the obtained approximation of the ideal of the so-called electric circuit DC. Differences of this approximation is mainly arise from the fact that arc conductive parts 2A, 3A, 4A, 5A do not form a complete and accurate range and that the current I1, I2, I3, I4in each arc conductive parts 2A, 3A, 4A, 5A does not have the same phase in the ol considered arc conductive part 2A, 3A, 4A, 5A.

You can use more or fewer loops, and the more used of the loops, the more arc approximation becomes perfect conductive rings. On the other hand, the more loops you use, the more complicated becomes the antenna structure. In the shown examples, the variant implementation uses four antenna type 1 clover leaf. Further, the smaller the used antenna type clover leaf, measured in wavelengths, the better the approximation, because then the current is changed to a lesser extent along this arc conductive parts 2A, 3A, 4A, 5A. Wavelength here preferably called the Central wavelength of the working frequency band of an antenna device according to the invention.

The ideal chart 18 directional constant current electrical loop, which is approximated by a four-antenna type clover leaf, shown in figure 2 and has the shape of a toroidal ring, where the arc of the toroidal ring is essentially follows the arc conductive parts 2A, 3A, 4A, 5A four-antenna type 1 clover leaf. The ideal chart 18 focus electric circuit DC has a longitudinal plane P' of symmetry that divides the toroidal ring into two equal circular half, so this continue the Naya plane P' of symmetry of the toroidal ring coincides with the plane P four leaf antenna type clover leaf.

According to the present invention four-antenna type clover leaf formed the first 19 and second 20 dipole placed orthogonal, as shown in figure 3, with the first 19 and second 20 dipoles made of conductive material, for example from a bent copper wire. The first dipole 19 contains the first feeding part 21 with two parallel conductors 21A, 21b and the first vibrating portion 22 containing two dipole vibrator 22A, 22b, where two feeding conductor 21A, 21b bent at a 90° angle so that the conductors or dipole vibrators 22A, 22b are now in opposite directions until they reach their ends. The second dipole 20 contains a corresponding second feeding part 23 and the second vibrating part 24 with the respective supply conductors 23a, 23b and dipole vibrators 24A, 24b. Conductive parts 21, 22, 23, 24 preferably have almost the same length.

Figure 4 dipoles 19, 20 are placed in the center of the four-antenna type clover leaf, shown conventionally only with arc conductive parts 2A, 3A, 4A, 5A. The dipoles 19, 20 have their respective feeding part 21, 23, raised perpendicular to the plane P four leaf antenna type clover leaf (not shown in figure 4)and the corresponding vibratory parts 22, 24 are almost parallel to the plane of caturegli the th antenna of the type of the clover leaf. During the first vibrating portion 22 is almost orthogonal over the second vibrating part 24.

The ideal chart 25 orientation of the dipole antenna 26 with the supply part 27 and the vibrator part 28 shown in figure 5 and has the shape of a toroidal ring. Vibratory portion 28 of the dipole antenna 26 is the Central axis around which is formed a toroidal ring chart 25 orientation. In other words, the curved shape of the chart 25 focus surrounds the vibrator portion 28 so that during the vibratory part 28 forms a Central line of symmetry of the toroidal ring.

As for the antenna according to the present invention with reference to Fig.6, the resulting diagram of the antenna shown in the side view, where the plane P four leaf antenna type clover leaf passes perpendicular to the plane of the sheet.

Four-antenna type 1 clover leaf creates the first toroidal figure 29 orientation having a first longitudinal plane P' of symmetry of the toroidal ring. The first chart 29 orientation marked with oblique lines that rise from left to right.

The first dipole antenna 19 creates a second toroidal figure 30 orientation having a second longitudinal plane P of symmetry of the toroidal ring, which is updaet with the plane of the sheet or the parallel and orthogonal to the first longitudinal plane P' of symmetry of the toroidal ring. The second chart 30 orientation shaded oblique lines running from left to right.

The second dipole antenna 20 creates a third toroidal figure 31 orientation, having a third longitudinal plane P' of symmetry of the toroidal ring, which is orthogonal to both the first longitudinal plane P' of symmetry of the toroidal ring and the second longitudinal plane P of symmetry of the toroidal ring. Thus, we have the first'P', the second P" and the third P' plane. The third chart 31 orientation shaded by horizontal lines.

Ideally, as shown in Fig.6, these diagrams 29, 30, 31 have the same phase center, but almost the second 30 and third 31 of the beam can be raised or lowered relative to the first chart 29 orientation. This deviation should preferably be small when measured in wavelengths, for example, about λ/10, where λ is the Central wavelength of the working frequency band of the antenna device.

Since the longitudinal plane P', P", P"' of symmetry of the toroidal rings are orthogonal to each other, the pattern orthogonal to each other according to the following definition.

In the result by the present invention obtained three different toroidal graphs 29, 30, 31 orientation, where each chart the direction of the surface orthogonal to the other.

Because the pattern is orthogonal, the correlation is equal to zero, where the correlation ρ can be written as:

In the above equation, Ω is the surface, and the symbol * denotes complex conjugation. To integrate the pattern Ω is a closed surface containing all spatial angles, and when this integration is equal to zero, between the directional diagrams no correlation, i.e. pattern orthogonal to each other. The denominator is a normalizing expression.

Three, at least essentially orthogonal chart orientation is desirable because it provides uncorrelated parallel channels in strongly scattering media, i.e. rows in the channel matrix can be independent. This in turn means that the present invention is applicable to MIMO systems.

In the above-described first embodiment, four leaf type antenna clover leaf and the first and second dipoles made of bent wire, for example of copper wire. Any conductive material can perform this function according to the present invention.

In the second embodiment, four leaf type antenna clover leaf and the first and second dipoles made learnin method making a microstrip antenna. As conventionally shown in Fig.7, tri-mode antenna according to the present invention contains the first 32 and second 33, 34 third and fourth 35 copper-clad dielectric thin layers (laminates), for example layers of Teflon, is placed on top of each other. By removing copper layers 32, 33, 34, 35 can be formed of various conductive structures. Removal of copper can be achieved by etching or, alternatively, milling.

7 the first 32 and second 33, 34 third and fourth layers 35, each having first 36, 37, 38, 39 and second 40, 41, 42, 43 hand, it is shown from the side, forming a multilayer structure. The multilayer structure has a top 44, a bottom 45 and the first 46 and second 47 and 48 third intermediate sections, each intermediate section 46, 47, 48 formed between two adjacent layers.

At the top 40 on the first side 36 of the first layer 32 formed dipole of the vibrator part. Below, the first intermediate section 46 between the first 32 and second 33 layer formed part of the four-antenna type clover leaf, or on the second side 40 of the first layer 32, or on the first side 37 of the second layer 33. On the unused side of all copper is removed.

Further down, in the second intermediate section 47 33 between the second and third layers 34, loop quatrefoil merged so that each loop of coedine is the total supply line and a common ground via through holes (not shown), connecting the first 46 and second 47 of the intermediate section. Then a combined circuit or the second side 41 of the second layer 33, or on the first side 38 of the third layer 34. On the unused side of all copper is removed.

Further down, in the third intermediate section 48 between the third 34 and fourth 35 layers, dipole vibratory parts are combined in such a way that they are connected to the respective supply lines and a common ground via through holes (not shown)connecting the top 44 and a third intermediate section 42. Further, in the third intermediate section 48 is formed by the supply line quatrefoil via through holes (not shown)connecting the second 47 and 48 third intermediate section. The supply line of the quatrefoil is connected with the connector 49 antenna type clover leaf on the edge of the multilayer structure. Thereby, the combined circuit or the second side 42 of the third layer 34, or on the first side 39 of the fourth layer 35. On the unused side of all copper is removed.

In the bottom 45, on the second side 43 of the fourth layer 35, is formed dipole feed line for each dipole via through holes (not shown)connecting the second intermediate section 47 and the bottom 45. Each dipole feed line connects to the connector 50 of the dipole antenna, while the EN only one) on the edge of the multilayer structure.

An example of how you can look etched vibrators type clover leaf and feeds them through the holes shown in figa. It shows four leaf etched antenna type 1 clover leaf, containing the first 2 second 3 third 4 fourth 5 loops. Each loop is connected to the first 51, second 52, third 53 and fourth 54 through hole. These through holes 51, 52, 53, 54 attached to one point to another point, in the example shown in Fig.7. in the other layer. Provided also fifth overall Central through hole 55, which eventually leads to two conclusions to power four leaf antenna type 1 clover leaf, and in the example shown in Fig.7. these findings are available through the connector 49 antenna type clover leaf.

Next on fig.8b shows an example of how you can look etched dipole vibrators and feeds them through holes. The first 19 of its dipole dipole vibrators 22A, 22b are connected with the corresponding first 56 and second 57 dipole apertures. The second dipole 20 its dipole vibrators 24A, 24b are connected with the corresponding first 58 and 59 second dipole apertures. These through holes 51, 52, 53, 54 is preferably carried out at a different level, as described in example 7, where each dipole is available through the connector 50, the corresponding end-to-end from which erstem 56, 57, 58, 59 of each dipole.

Due to the reversibility for the described properties of the transfer of all tri-mode antenna devices are corresponding to the same properties of the technique, as known in the art, allowing tri-mode antenna device to transmit and receive in three almost uncorrelated modes.

The invention is not limited to the above-described variants of implementation, which should only be considered as examples of the present invention, but can be freely modified within the scope of the applied claims.

For example, not necessary to have two discrete dipole antenna. To achieve the described dipole directional diagrams need to carry two electric dipole, which means no need that requires two discrete dipole antenna. Two electric dipole can be obtained through the use of only three dipole vibrators - the first 60, 61 of the second and third 62 dipole vibrator, each of which passes outward from a Central point, as shown in figa and 9b. The Central ends of the dipole vibrators are connected with the supply device 63 by suitable feeding wires 64, 65, 66. These three dipole vibrator 60, 61, 62 are such that between them form an angle essentially equal to 60°, i.e. they can p is ahadith symmetrically. Further, the positive direction of current is taken from the center outward.

In the first operation mode, as shown in figa, the first dipole vibrator 60 is supplied current, having a relative amplitude is√2, the second dipole vibrator 61 is supplied current, has a relative amplitude of √2, and the third dipole vibrator 62 is supplied current, having a relative amplitude 0. The resulting first electric dipole 67 (marked by dashed lines) is directed essentially perpendicular to the third dipole of the vibrator 62.

In the second operation mode, as shown in fig.9b, the first dipole vibrator 60 is supplied current, having a relative amplitude of 1/√2, the second dipole vibrator 61 is supplied current, having a relative amplitude of 1/√2, and the third dipole vibrator 62 is supplied current, has a relative amplitude of 1. The resulting second electric dipole 68 (marked by dashed lines) is directed essentially in parallel to the third dipole of the vibrator 62.

Thus obtained two orthogonal electric dipole 67, 68 using only three dipole vibrators 60, 61, 62.

It is also possible to use an electric dipole placed in a circle instead of the above-described antenna configuration type clover leaf to implement the approximation e the practical circuit DC.

In the first embodiment according figa and 10b of the first 69, 69', the second 70, 70' and the third 71, 71' electric dipoles, each preferably in the form of a dipole antenna placed in the shape of an equilateral triangle 72, 72'. Inside this triangle 72, 72' are two more orthogonal electric dipole (not shown) by any of the previously described methods.

In the second variant on figa and 11b of the first, 73, 73', second 74, 74', and the third 75, 75' and fourth 76, 76' electric dipoles, each preferably in the form of a dipole antenna placed in the shape of a square 77, 77'. Inside this square 77, 77' are two more orthogonal electric dipole (not shown) by any of the previously described methods.

In the first case, figa 11a and the corresponding dipole feeding conductive parts 78, 79, 80; 81, 82, 83, 84 placed in the middle of each side of the triangle 72 or 77 square respectively. This leads to the fact that every single electric dipole 69, 70, 71; 73, 74, 75, 76 is almost straight.

In the second case, fig.10b and 11b corresponding dipole feeding conductive parts 78', 79', 80'; 81', 82', 83', 84' placed in each corner of the triangle 72' or square 77', respectively. This leads to the fact that every single electric dipole 69', 70', 71'; 73', 74', 75', 76' situated at an angle of 60° triangle and 90° for square.

Corresponding to the above-described dip the if must be rated so to currents (not shown in these drawings) in the dipoles were essentially in phase with each other, providing an approximation of the electrical circuit DC.

For examples figa, 10b, 11a and 11b possible, of course, and other geometric shapes. With regard to the above-described antenna type clover leaf, you can use a different number placed in a circle of electric dipoles. The more used electric dipoles, the more accurate is the approximation of an ideal conducting rings. On the other hand, the more used electric dipoles, the more complex becomes the antenna structure.

All of the planes P, P', P", P"' are imaginary and only added for clarification.

Multilayer configuration described with reference to Fig.7, is only an example of how such an arrangement can be implemented. Many other such configurations are possible within the scope of the invention.

It is also possible and a lot of other configurations, which are made planar method. As mentioned earlier, can for example be used curved wire.

All of the supply line, combining circuit and connectors, which are not dealt with in more detail in the description, relate to well known type, easily designed and (or) obtained by experts.

Antenna type clover leaf does not t aetsa necessary for carrying out the invention, the essence of this part of an antenna device according to the present invention is to provide at least approximation of the electric circuit DC, lying in the previously mentioned plane P four leaf antenna type clover leaf, which in a more General form of is the antenna plane P, which is the result approximated electrical circuit DC.

Antenna type clover sheet according to the above variants of the implementation is the preferred way to ensure such an approximation. The number of loops clover leaf may vary, as mentioned above, but should not be less than two, to ensure that any positive effect. The loop must not lie exactly in the same plane, but may slightly deviate while maintaining the principle of operation. The direction of the electric current may deviate from those disclosed.

1. The antenna device containing means(1, 72, 72', 77, 77') to provide an approximation of the electrical circuit DC, and the approximation of the electric circuit of the constant current is made to ensure essentially doughnut charts (29) orientation, and the antenna device comprises a first (67) and second (68) electric dipoles, which are available almost orthogonal to each other and made to provide a second (30) and third (31) essentially toroidal directional diagrams, each of which is essentially orthogonal to the other, and the first is essentially a pie chart (29) orientation, characterized in that the said means(1, 72, 72', 77, 77') for the approximation of the electric circuit DC includes at least two parts(2, 3, 4, 5; 69, 70, 71; 69', 70', 71'; 73, 74, 75, 76; 73', 74', 75', 76') current paths in which current (I1, I2, I3, I4can be fed to each of these parts(2, 3, 4, 5; 69, 70, 71; 69', 70', 71'; 73, 74, 75, 76; 73', 74', 75', 76'), so the current (I1, I2, I3, I4in each of these parts(2, 3, 4, 5; 69, 70, 71; 69', 70', 71'; 73, 74, 75, 76; 73', 74', 75', 76') will be essentially in phase with each other.

2. The antenna device according to claim 1, characterized in that the electric circuit DC approximated by the antenna (1) type the clover leaf.

3. The antenna device according to claim 2, characterized in that the antenna type, the clover leaf is a four-antenna (1) type the clover leaf.

4. The antenna device according to claim 1, characterized in that the electric circuit DC approximated by at least three placed on a circle of electric dipoles(69, 70, 71; 73, 74, 75, 76; 69', 70', 71'; 73', 74', 75', 76').

5. The antenna device according to any one of the preceding paragraphs, characterized in that each of the first and second electric dipoles (67, 68) is formed by the dipole EN Jenny (19, 20), each dipole antenna (19, 20) has two dipole vibrator (22A, 22b; 24a, 24b).

6. The antenna device according to any one of claims 1 to 4, characterized in that each of the first and second electric dipoles (67, 68) is formed by the dipole antenna device containing three dipole vibrator (60, 61, 62), passing from a Central point so that between them form an angle essentially equal to 60°, while the dipole antenna device is operated so that the generated electric dipoles (67, 68).

7. The antenna device according to any one of claims 1 to 4, characterized in that the antenna device is made planar method.



 

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5 cl, 4 dwg

FIELD: physics, radio.

SUBSTANCE: invention is related to antenna device, which comprises facility for provision of approximation of electric circuit of DC, which is arranged for provision of the first practically toroidal directional pattern, at that antenna device comprises the first and second electric dipoles, which are installed substantially orthogonally to each other and are arranged to provide for the second and third substantially toroidal directional patterns, every of which is substantially orthogonal to the other one and to the first substantially toroidal directional pattern. Facility for approximation of DC electric circuit comprises at least two parts of current tracks, in which current (I1, I2, I3, I4) may be supplied to every of mentioned parts, so that currents (I1, I2, I3, I4) in each of mentioned parts are practically cophased to each other.

EFFECT: development of antenna device that comprises facility for provision of DC electric circuit approximation.

7 cl, 15 dwg

FIELD: radio engineering.

SUBSTANCE: invention may be used to develop double-frequency, bipolar phased antenna arrays of wide-angle scanning for reception/transfer of signals in metre and decimetre range of frequencies of various polarisation in wide spectrum of angles. Design of this combined antenna consists of modules containing antenna arrays from cross-vibrators with various dimension types for metre and decimetre ranges arranged in triangular grids calculated to maintain wide-angle capacity of beam swinging, with establishment of distances between columns of cross-vibrators of each range equal to dx(1.2)=0.45λ0(1.2) and between lines dy(1.2)=0.32λ0(1.2), where λ0(1.2) - average length of wave in working range of metre or decimetre range antenna accordingly, besides, areas of decimetre range cross-vibrators location do not comply with areas of metre range cross-vibrators installation. Moreover, low-pass filter is inbuilt into design of metre range antenna cross-vibrator. Parametres of filter are selected so that it transmits frequencies of metre range antenna working range practically without losses and suppresses frequencies outside working range and on higher harmonics. Filter is inbuilt into feeding stand of cross-vibrator and represents coaxial line with central conductor of alternating diametre. Configuration of central conductor is determined by required characteristics of the filter. As a result, cross-vibrator of metre range represents united design with filter.

EFFECT: minimisation of HF-range radiators effect at DN and matching in LF-range, which provides for noise-immunity of metre range antenna, wide-angle capacity of scanning and reduced time for tuning for coordination in the whole coverage sector.

2 cl, 14 dwg

FIELD: radio engineering, communication.

SUBSTANCE: multi-pole antenna, having a dielectric substrate on which four identical half-wave dipoles are arranged symmetrically on a circle, each made in form of a resonance section of a periodic microstrip line with the width at the centre which is equal to a quarter of the average wavelength and linearly narrowing towards the peripheral region.

EFFECT: improved cross-polarisation properties while achieving rotating circular or elliptical polarisation and a uniform beam pattern in a wide frequency band, and overall dimensions of the antenna which are considerably smaller than the maximum operating wavelength.

6 cl, 6 dwg

FIELD: to antenna engineering.

SUBSTANCE: for this purpose, an electromagnetic dipole antenna comprises an antenna radiating element and the “ground” metal, wherein the antenna radiation unit mainly comprises perpendicular electric vibrators and horizontal magnetic vibrators, wherein perpendicular electric vibrators and horizontal magnetic vibrators together form an electromagnetic coupling structure.

EFFECT: advantages of small size, low profile, in order to facilitate the erection of the antenna.

6 cl, 10 dwg

FIELD: radio engineering, communication.

SUBSTANCE: antenna is designed so, that the orthogonal vibrators are placed on the frame in the form of the thin-walled dielectric hemisphere, mounted on the screen. The antenna is consistent by means of the hemisphere radius and the slit cut in each of the vibrators arms position selection. The vibrator direction pattern has the same half power width of E and N-planes.

EFFECT: provision of the circular polarisation with the ellipticity coefficient more than 0,85 in the solid angle of 100 degrees.

2 cl, 4 dwg

FIELD: radio engineering, communication.

SUBSTANCE: two-polarized dipole antenna comprises a radiator of two orthogonal dipoles located in a plane parallel to the reflector. Each arm of the dipoles is formed by a pair of conductors symmetrically bent relative to the longitudinal axis of the dipole, closed around each other at the feed point with one end and having a gap between the second ends which forms a rupture of the arm contour. The initial portion of each conductor adjacent to the feed point is rectilinear and parallel to the initial portion of the adjacent second dipole conductor and to the end portion of the second conductor portion of the pair adjacent to the gap. The essence of the solution lies in the fact that the initial portions of conductors are made with a length L = (0.07-0.15)⋅λmid, where λmid is the wavelength corresponding to the midfrequency of the frequency range, wherein the initial and end portions of each conductor are interconnected by an intermediate portion. The intermediate portion can be made rectilinear or in an arc.

EFFECT: improved matching of the dipoles with the supply cable and expanded operating frequency band.

5 cl, 19 dwg

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