Extended-range superhigh-frequency dipole antenna

FIELD: microwave antenna engineering.

SUBSTANCE: each arm of half-wave dipole is assembled of three conducting semi-rings hinged together at ends and turned to -shaped working position. Dipole arms are reflection symmetric and shorted out at midpoints of upper semi-rings by means of conducting jumper. Each dipole arm can be made of two hinged semi-rings turned to -shaped working position. Arms are shorted out at hinged points of semi-rings. Flat arm width amounts to 0.04 - 0.05 of mean VHF wavelength in operating frequency band of antenna that incorporates provision for excitation dispensing with balancing device.

EFFECT: extended range at adequate matching and gain, improved operating characteristics.

12 cl, 3 dwg

 

The invention relates to radio engineering, in particular to techniques for microwave antennas, and can be used for reception and radiation of electromagnetic waves in the radio-electronic devices for various purposes, for example in a broadband communication line, including radar and other consumer communications.

Know a wide variety of array antennas with an expanded operating range of the waves resulting design features of their implementation.

The most simple solutions extend the operating frequency range of the vibrator antennas are known dual antenna, for example mounted on a telescopic or collapsible mast dual discohouse antenna: top - decimeter waves and lower - in the range meter waves (see the book Ilnitskiy L.Y. and Balboa A.A. Antenna device of the civil aviation airports. M: "Transport", 1983, S. 173-174, Fig. 8.7), and the combined antenna, for example a dual-band antenna shared device summation of the signals of both frequencies (see application Germany No. 2262511, H 01 Q 21/30, 1979).

The drawbacks of such antennas are the complexity of the design due to the use to extend the operating frequency range features two antennas with two feeders and shared devices mixing signals in the example combined the new antenna, and related in both types of antennas deterioration dimensions and other operational characteristics, in particular inconvenience during transportation and Assembly. Combo antenna is characterized by even and degraded electrical properties - loss of electromagnetic energy resulting from the introduction of the extra resistive load.

More simple in design array antenna with an extended working range of the waves due to broadband vibrators, for example in the form of a series of vibrators powered symmetric feeder, with symmetrical longitudinal shoulders fed in opposite phase (see USSR author's certificate No. 1054853, H 01 Q 11/10, 1983), and on the basis of one of the vibrator, such as an annular three-dimensional constructions with two symmetrical curved shoulders, working as a conductive surfaces forming the ends on one side of the antenna input and connected through the impedance of the load adjacent the ends on the other side, and having in the middle of the extended part of the gap short circuit halves of the shoulder through the same load (see application Germany No. 1945850, 1981).

These antennas dimensions also increased, which reduced such operational characteristics as the inconvenience in transportation or installation, and the ring antenna is increased loss of electromagnetic energy is due to the presence in the shoulders vibrator loads.

More successful from the point of view of operational requirements, design solution provide two operating frequency ranges from 100 to 150 MHz and from 220 to 400 MHz antenna broad band antenna-15, developed in 2002, and represents a symmetrical biconical vibrator simplified design in the education of six linear elements of the conical surface of its broadband shoulders (see specifications IT THAT. Antenna broad band antenna-15. List and Manual ITERA. The device antenna-mast AMU-15. Leaves 2, 16 and 43).

However, this representative of automatically unfolding communication antennas made with the possibility of folding the antenna and pull it inside the telescopic mast, convenient for transportation and storage, has such disadvantages as low mechanical strength of the working elements of the antenna due to the shoulders in the form of metal rods, which may affect the stability of the operating parameters of the antenna, a reserve reduction of mass and size parameters of the antenna, because the mass of 6.5 kg of the antenna ˜300 kg antenna driven design made stationary on the vehicle with an overall inconvenience, and not sufficiently reliable due to complication automatic the drive mechanism for the deployment of the antenna.

Naib is more close to the claimed antenna to the technical essence is known symmetric band shunt vibrator GS Eisenberg, in which to extend the operating frequency range as well as reducing the wave resistance of the longitudinal arms of the vibrator, made from conductive plates with a large perimeter of the cross section taken vibrator antennas of two parts with different frequency dependence of the input resistance in the form of shoulders, with one hand the connection of the adjacent ends of the arms with the feeding feeder and short-circuited with each other in the gap between the ends of the shoulder through the conductive jumpers (see the book of Kozarzewski GN. and other Antenna-feeder devices. M.: Radio and communication, 1989, 138-141 C., Fig. 7.3 (a).

The selected prototype is characterized when extending the operating range of the waves increase in weight and size parameters of the antenna, reducing its performance, in particular deteriorating the convenience of storage, transport and installation of communication, and the need for special balancing device when powered dipole unbalanced coaxial cable.

The technical result of the invention is the increase of the overlapping wavelength range with satisfactory coordination and strengthening with the possibility of excitation of coaxial line without the use of balancing devices and improved ek is operating characteristics due to lightning protection without additional devices and reduce mass and size parameters of the antenna and increase the convenience store, transportation and installation of the antenna, which is especially important in connection with saturated placement of radar equipment in vehicles, as well as improving the manufacturability and moderniziruyet with the ability to build additional links for expanding the frequency band, improved maintainability and the expansion of the scope.

This technical result is achieved by the fact that the vibrator microwave antenna with an extended working range of the waves on the basis of broadband in the range meter - decimeter symmetric half-wave vibrators, consisting of the two arms made of wide strips of conductive material, having on the one hand the connection of the adjacent ends of the arms with the feeding feeder and short-circuited with each other in the gap between the ends of the shoulder through the conductive jumpers, shoulders vibrator made in the form of a split in the plane of the shoulder parts, representing a broad, flat half, Paldiski, angles, triangles, and other polygonal shapes, made of conductive material and pivotally connected ends interconnected with the possibility of their galvanic contact and fixation of their work relative position in the form of a snake, zigzag and other broken lines, for example -,-figurative work location links in the number and three or more-,- figurative work location links in the number of two or more, as part of the right shoulder of the vibrator with mirrored specified work location links to the left shoulder of the vibrator in accordance with figures 1 and 2 to the description of the invention, the average point of the upper half-rings or parts of the two three-tier shoulders or parcel point connection semirings or corners between two two-tier shoulders vibrator short-circuited by a conductive bridge, and the width of the shoulder is 0,04-0,05 from mid-wavelength meter range in the operating frequency band of the antenna.

Provides for the implementation of fixation devices for work relative position of parts of the shoulder, combined with structural elements ensure galvanic contact with each other, for example, bolting through the holes in the flat areas of galvanic contact links, while holes are made arcuate with the possibility of tuning fixation of parts of the shoulder, and the links of the arms of the vibrator can be made of metal plates or printed circuit boards.

The antenna design allows folding due to the possibility of the spine of the pivot arms of the vibrator around the axis of mirror symmetry of the vibrator, and short the jumper has an average axial point of its hinge fracture, providing the possibility of folding the halves jumpers without breaking the galvanic contact between them when folding jumpers.

In the links shoulders vibrators antenna holes for fixation increases the rigidity of the antenna design of the transverse crosspieces mounted along the perimeter of the antenna in the horizontal plane during its installation, and they cross bridge made of a dielectric material that does not affect the input impedance of the antenna.

Design features of the proposed antenna with performance in the extended operating range of the waves with the possibility of simultaneous operation in VHF and UHF frequencies and a significant simplification of the structure in the case of limiting the number of links in the shoulder and one due to the absence in the inventive antenna separate balancing device, allow the provision of folding links shoulders in the plane of the shoulder, as well as folding shoulder rotation around the vertical Central axis of the vibrators to reduce the overall dimensions of the antenna and thereby improve the convenience of storage, transport and installation of the antenna.

The small size of separate identical parts of the shoulders vibratore the antenna increase the adaptability of its production from the metal plate or printed circuit Board, in the latter case manufacturing (PCB) antenna greatly facilitated by mass, and swivel links shoulders between them improves manufacturability configure and control the operating mode of the antenna due to the possibility of changing the distance between the shoulders of the vibrator.

The design of the antenna is easily upgradable in the lightweight attach additional links and capacity shoulders vibrators to extend the frequency range, as well as ramonesmania in different operating conditions.

The ability to zoom with the formation of the directional diagrams of several vibrators with a vertical flat shoulders, placed radially in a horizontal plane around the vertical Central axis of the antenna, the operation mode of the coupled antenna with circular radiation pattern in the horizontal plane by expanding the scope of the claimed antenna from specialized communication antennas, TV antennas.

The antenna design in connection with the closure of the symmetric shoulders vibrator has the lightning.

Sources of information the antenna claimed by a set of structural characteristics that provide a combination of the above characteristics, namely the improvement of its operational performance, and the achievement of acceptable working the s parameters of the antenna are given the considerable overlap of the working wavelength range, not found.

Figure 1 and 2 presents the different variants of the proposed antenna; figure 3 - results of measurement of dependence of the standing wave ratio on the frequency characterizing the approval of the vibrator antenna versions 1 and 2 and embodiment 1 is short-circuited without jumpers.

The inventive antenna is made on the basis of symmetric broadband half-wave vibrators, consisting of the two arms 1, each of which contains three (see figure 1) or two (see figure 2) connected by a link 2, each in the form of a wide flat semiring (in this example, execution) of conductive material, using hinge joints 3 at the ends of the links to expand links 2 from the folded position (one semi-circle) in the working arrangement of links in the form of snakes:orshown in figures 1 and 2, a locking configuration and a galvanic contact is electrically connected sites link 2 along the edge of the shoulder 1 through, for example, bolting through the holes 4 in the flat areas of galvanic contact links 2 with the implementation of the arcuate holes 4 for adjusting the fixing parts 2 (figures dugoobrazno holes 4 are not shown).

The vibrator has on the one hand is soedineniya 5 adjacent ends of the arms 1 with the feeding feeder and between Konami shoulder 1 short circuit shoulders to each other via a conductive jumper 6, connecting the midpoints of the upper half-rings of the two three-tier shoulders 1 (see figure 1) or parcel point connection semirings between two two-tier shoulders 1 (see figure 2).

Thus the width of the shoulder 1, in this example semiring, is 0,04-0,05 from mid-wavelength meter range in the operating frequency band of the antenna, ensuring the electrical length from the point of excitation of internal and external contour of the shoulder 2 in an amount equal to half the average wavelength of the operating range, and units 2 shoulder 1 of the vibrator can also be in the form and paludica, corner, triangular and other polygonal shapes with education in the working position of the rings also zigzag:or(figures zigzag manner vibrator not shown) and other polyline.

The antenna may consist of one or more of the links 2 and the vibrators, forming a folding antenna design due to the possibility of a reversal of the shoulders 1 around the axis of mirror symmetry 7 of the vibrator and the hinge fracture at the mid-point 8 shorting jumper 6 without breaking the galvanic contact between its halves.

In parts 2A shoulders 1 vibrator with holes 9 for fixing them in the cross-bridges, which increases the rigidity of the antenna structure mounted at the mouth of the information of the antenna along its perimeter in a horizontal plane and is made of a dielectric material, not affect the input impedance of the antenna cross bridge on the figures not shown).

The antenna operates in the mode of vertical-horizontal polarization with a satisfactory agreement in a wide range of frequencies. Experimentally confirmed extended operating frequency range of the antenna from 50 to 620 MHz (with a 10-fold overlap) with the approval of the vibrator antennas in two versions 1 and 2 (curves 1 and 2 in figure 3), improved in comparison with the approval of the vibrator in the embodiment in figure 1 without short jumper (curve 3, figure 3).

The antenna provides an operating mode with gain ˜1 dB meter and ˜3 dB in the UHF frequency range.

The antenna is operable at the connection point 5 of the coaxial cable without balancing device and does not require mixing device, the absence of which have a positive impact on the coordination of the vibrator with the feeder in a wide frequency band, and no additional lightning protection devices.

Due to the collapse of the shoulders 1 turn units 2 around the axis of the hinge joints 3 and folding shoulders 1 rotation around the vertical axis 8 is achieved compactness of the antenna during transportation with dimensions of 17 cm × 35 cm with a width of half rings ˜9.5 cm (height depends on the number of links).

1. Array microwave antenna with an extended working range of the waves on the basis of broadband in the range meter - decimeter symmetric half-wave vibrators, consisting of the two arms made of wide strips of conductive material, having on the one hand the connection of the adjacent ends of the arms with the feeding feeder and short-circuited with each other in the gap between the ends of the arms through the conductive jumpers, characterized in that the shoulders of the vibrator is made in the form of a split in the plane of the shoulder parts, representing a wide flat ring made of conductive material and pivotally connected ends interconnected with the possibility of their galvanic contact and fixation- figurative work location links in the number three as part of the right shoulder of the vibrator with mirrored specified work location links to the left shoulder of the vibrator, while the middle point of the upper half-rings of the two three-tier shoulders short-circuited by a conductive bridge, and the width of the shoulder is 0,04-0,05 average wavelength meter range in the operating frequency band of the antenna.

2. The antenna according to claim 1, characterized in that the fixation means working relative position of parts of the shoulder made somese is related with the structural elements of the galvanic contact links among themselves, for example, in the form of bolting through the holes on the flat electrically connected to the contact areas of the parts.

3. The antenna according to claim 2, characterized in that the holes on the flat areas of galvanic contact links among themselves under the bolted connections are arcuate with the possibility of tuning fixation of parts of the shoulder.

4. The antenna according to any one of claims 1 to 3, characterized in that the links shoulders vibrator is made of metal plate or printed circuit Board.

5. The antenna according to claim 1, characterized in that its structure is made folding through the rotation of the shoulders of the vibrator around the axis of mirror symmetry of the vibrator, and short the jumper has an average axial point of its hinge fracture, providing the possibility of folding the halves jumpers without breaking the galvanic contact between them when folding jumpers.

6. The antenna according to claim 5, characterized in that the links shoulders vibrators with holes for fixation increases the rigidity of the antenna design of the transverse crosspieces mounted along the perimeter of the antenna in the horizontal plane and the cross bridge is made of a dielectric material that does not affect the input impedance of the antenna.

7. Array microwave antenna with an extended working range of the waves on the basis of broadband in d is apatone meter - decimeter symmetric half-wave vibrators, consisting of the two arms made of wide strips of conductive material, having on the one hand the connection of the adjacent ends of the arms with the feeding feeder and short-circuited with each other in the gap between the ends of the shoulder through the conductive jumpers, characterized in that the shoulders of the vibrator is made in the form of a split in the plane of the shoulder parts, representing a wide flat ring made of conductive material and pivotally connected ends interconnected with the possibility of their galvanic contact and fixation- figurative work location links at number two in the composition of the right shoulder of the vibrator with mirrored specified work location links to the left shoulder of the vibrator, this parcel point connection semirings between two two-tier shoulders short-circuited by a conductive bridge, and the width of the shoulder is 0,04-0,05 average wavelength meter range in the operating frequency band of the antenna.

8. The antenna according to claim 7, characterized in that the fixation means working relative position of parts of the shoulder are made combined with the structural elements of the galvanic contact of the links between them, e.g. the measures in the form of bolting through the holes on the flat electrically connected to the contact areas of the parts.

9. Antenna of claim 8, characterized in that the holes on the flat areas of galvanic contact links among themselves under the bolted connections are arcuate with the possibility of tuning fixation of parts of the shoulder.

10. The antenna according to any one of claims 7 to 9, characterized in that the links shoulders vibrator is made of metal plate or printed circuit Board.

11. The antenna according to claim 7, characterized in that its structure is made folding through the rotation of the shoulders of the vibrator around the axis of mirror symmetry of the vibrator, and short the jumper has an average axial point of its hinge fracture, providing the possibility of folding the halves jumpers without breaking the galvanic contact between them when folding jumpers.

12. The antenna according to claim 11, characterized in that the links shoulders vibrators with holes for fixation increases the rigidity of the antenna design of the transverse crosspieces mounted along the perimeter of the antenna in the horizontal plane and the cross bridge is made of a dielectric material that does not affect the input impedance of the antenna.



 

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