Wideband zigzag antenna

FIELD: radio engineering.

SUBSTANCE: invention is related to radio engineering, in particular to antennas, and may be used in transceiving devices at frequencies of higher than 1 GHZ with application of various supply lines. Wideband zigzag antenna, comprising active vibrator, consists of two identical metal arms, located symmetrical relative to supply points. Technical result is achieved by the fact that antenna is added with a matching element. Identical metal arms of active vibrator have elliptical shape. Matching element consists of two conducting planes of elliptical shape, every of which has a permanent gap relative to according metal arm of active vibrator.

EFFECT: provision of proper extent of matching with various supply lines, having standardised inlet resistances of 37,5 Ohm and more.

2 cl, 1 dwg

 

The invention relates to the field of radio engineering, in particular to antennas, and can be used in the receiving-transmitting devices at frequencies above 1 GHz using different feed lines.

It is known device is a Flat antenna for reception of satellite signals broadcast by the author's certificate of the USSR No. 1617501, IPC H01Q 10/00 published in the refereed journal "inventions of the world" VIP, No. 6, 1991, the Device comprises a rectangular metal shield and two identical zigzag ribbon conductor located in a plane parallel to the plane of the screen. The specified device also includes a dielectric substrate on both sides of which there are metal tape guides.

Another known device "Reception TV antenna" patent Australia No. 576031, IPC H01Q 9/28, published in the refereed journal "radio" No. 9, 1989, includes the active emitter (active vibrator) in the form of rhombic frames (shoulder). Rhombic frames combined in the same plane one inside the other. The perimeter of each of the frames selected in such a way that they have different resonant frequencies.

The disadvantage of this antenna is the large input resistance, the inability to obtain a low SWR in a wide range of frequencies and provide Apasov who were different supply lines because of the lack of additional matching elements.

Known solutions the closest to the technical nature of the claimed object is a device-prototype Broadband zigzag antenna with reflector (Patent RU No. 2122762, IPC H01Q 19/00). The antenna includes an active vibrator, consisting of two identical metal shoulders (rhombic frames)located symmetrically with respect to the feed points.

The drawback of the device, taken as a prototype, is the design complexity and lack of coordination in a wide range of frequencies with different supply lines.

The main task, which directed the claimed invention is to provide coordination with various supply lines having a standardized input impedance of 37.5 Ohms or more.

The technical result achieved in the implementation of the proposed technical solution is to simplify the construction and expansion of the scope by ensuring coordination among different supply lines.

This technical result is achieved by the fact that in the known broadband zigzag antenna containing the active vibrator, consisting of two identical metal shoulders arranged symmetrically about the point of supply, in accordance with the proposed technical solution additionally contains a matching cell battery (included) is t, consisting of two conductive planes elliptical shape having a constant gap with respect to two identical metal shoulders active vibrator, with metal shoulders active vibrator have an elliptic shape, and the width of the gap between the matching element and the metal shoulders active vibrator and geometric parameters of the matching element are determined by computer simulation with a finite difference method in the time domain.

Performing metal shoulders active vibrator elliptical with additional matching element, consisting of two conductive planes elliptical shaped and positioned with a gap relative to the metal shoulders active vibrator allows for mutual compensation of capacitive and inductive components of the wave resistance of an antenna in a wide range of frequencies.

In an advantageous embodiment of the invention the metal shoulders active vibrator and the matching element is made from a flat foil deposited on the surface of a common substrate that can be implemented in a compact printed antennas.

Given the applicant an analysis of the level of technology has allowed to establish that the analogues, characterized by sets of signs identical with all the attributes declared broadband zigzag antenna, no. Therefore, the claimed technical solution meets the condition of patentability "novelty".

Search results of known solutions in this field of technology in order to identify characteristics that match the distinctive features of the prototype of the characteristics of the proposed technical solution, showed that they do not follow explicitly from the prior art. Of certain of applicant's prior art there have been no known impact provided the essential features of the claimed technical solution of transformations on the achievement of the technical result. Therefore, the claimed technical solution meets the condition of patentability "inventive step".

The drawing shows the appearance of the proposed broadband zigzag antenna.

Broadband zigzag antenna contains the active vibrator, consisting of two identical metal shoulder 1 elliptical, located symmetrically with respect to the feed points, the matching element 2, made in the form of two metal planes elliptical shape, are placed on a common dielectric substrate 3. Each of the planes has a constant gap relative to the corresponding metal shoulder active vibrator. The antenna contains symmetrise U coaxial to the Leno 4, located in the center of symmetry of the antenna and connected to the feeding points. Geometric design parameters are determined by computer simulation with a finite difference method in the time domain.

Broadband zigzag antenna operates as follows.

Under the influence of the voltage applied to the feeding points of the antenna, on the surface of the antenna currents arise that through matching element 2 consisting of a metal planes elliptical, shall be divided into four components: the currents flowing through the two metal shoulders 1 active vibrator, and the currents flowing through the two elliptic planes matching element 2. Thus, the metal elements of the antenna there is a complex pattern of currents, forming the electromagnetic field.

According to the proposed invention created layout broadband zigzag antenna in compact version on the dielectric substrate, with a bandwidth level VSWR=2 in the range of about 50-55% of the Central frequency, gain, amounting to 7dB, the width of the beam in the plane E, is equal to 70 degrees, and in the plane H, is equal to 90 degrees, connected to the feeder with a wave impedance of 50 Ohm.

1. Broadband zigzag antenna, including an active vibrator, Ostoji of two identical metal shoulders, arranged symmetrically about the point of supply, characterized in that it contains a matching element, identical metal shoulders active vibrator have an elliptical shape, the matching element comprises two conductive planes elliptical shape, each of which has a constant gap relative to the corresponding metal shoulder active vibrator.

2. The device according to claim 1, characterized in that two identical metal shoulder active vibrator and the matching element is made from a flat foil deposited on the surface of a common substrate.



 

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