RU62740U1 - BROADBAND ANTENNA - Google Patents

Abstract

The utility model relates to the field of radio engineering and can be used in antenna transceiver location devices. The problem to which the claimed utility model is directed is to provide electronic control of the polarization of the emitted signal. A broadband antenna, made in the form of a truncated equilateral pyramid, whose faces are divided by dielectric inserts into segments, the lengths of which are selected with a variable pitch from 0.1λ _min to 0.1λ _max , where λ _min and λ _max are the boundaries of the working frequency range, contains two mutually orthogonal log-periodic structures of symmetric vibrators, the planes of which are orthogonal and inclined relative to the horizon by an angle of 45 °, two pairs of symmetrical two-wire lines powered by two power amplifiers.

Description

The utility model relates to the field of radio engineering and can be used in antenna transceiver location devices.

Known broadband antenna containing a two-wire power line and the structure of log-periodic vibrators (AS USSR No. 248010 according to class N 01 Q 9/24 from 07/10/09).

This antenna allows you to reduce the size of the antenna and narrow the radiation pattern. The disadvantage of this antenna is that it does not provide electronic control of the polarization of the emitted signal.

The closest technical solution for the set of essential features is an antenna containing two mutually orthogonal structures of symmetrical log-periodic vibrators, the planes of which are orthogonal and inclined relative to the horizon by an angle of 45 °, connected to two pairs of symmetrical two-wire power lines, and insulators (A.S. USSR No. 1660088 according to class N 01 Q 11/10 dated 06/30/91).

This antenna allows you to work with a field of rotating polarization with a coefficient of at least 0.4. The disadvantage of this antenna is that it does not provide electronic control of the polarization of the emitted signal.

The problem to which the claimed utility model is directed is to provide electronic control of the polarization of the emitted signal.

The problem is solved due to the fact that a broadband antenna containing two mutually orthogonal log-periodic structures of symmetric vibrators, the planes of which are orthogonal and inclined relative to the horizon by an angle of 45 °, connected to two pairs of symmetrical two-wire power lines, and the vibrators are suspended from the faces of a metal shaped structure in a truncated equilateral pyramid with support faces and are separated by dielectric inserts into segments whose lengths are chosen with a variable pitch from 0,1λ _min about 0,1λ _max, and where λ _min λ _max, - boundary of the working frequency range, wherein the parallel ground mounted pyramid axis along which the front and rear supports are mounted two parallel two-wire supply line from the two power amplifiers.

Figure 1 shows the design of a broadband antenna; figure 2 - the design of log-periodic structures of symmetric vibrators; figure 3 is a fragment of an antenna with a node for connecting power lines.

The broadband antenna is made in the form of a truncated equilateral pyramid 1, the faces of which, as well as the supports 2, are divided by dielectric inserts 3 into segments whose lengths are selected with a variable pitch from 0.1λ _min to 0.1λ _max , where λ _min and λ _max , - the boundaries of the working frequency range, while the axis of the pyramid is installed parallel to the ground along which

two two-wire power lines 4 and 5 are attached in parallel from two power amplifiers 6 and 7 (Fig. 3). Figure 2 shows two mutually orthogonal log-periodic structures 8 and 9 of symmetric vibrators 10.

Broadband antenna operates as follows.

Electromagnetic energy supplied by two two-wire power lines 4 and 5 from two power amplifiers 6 and 7, operating from a common exciter (not shown conventionally in FIG.), Excites log-periodic structures 8 and 9 of symmetrical vibrators 10. As a result, the antenna allows the power to be summed in space two power amplifiers 6 and 7.

The use of two pairs of symmetrical two-wire power lines 4 and 5 allows you to use a push-pull circuit to connect two power amplifiers with unbalanced outputs, which allows you to summarize in space the power from four power amplifiers at once.

When changing the phases of the signals at the inputs of power amplifiers 6 and 7, you can control the polarization of the emitted signal: from vertical to horizontal, including circular.

Thus, the proposed broadband antenna allows for electronic control of the polarization of the emitted signal.

Claims (1)

A broadband antenna containing two mutually orthogonal log-periodic structures of symmetric vibrators, the planes of which are orthogonal and inclined relative to the horizon by an angle of 45 °, connected to two pairs of symmetrical two-wire power lines, characterized in that the vibrators are suspended from the faces of the metal truss in the form of a truncated equilateral pyramid, wherein the support faces and are separated by dielectric inserts into segments whose lengths are chosen with a variable pitch from 0,1λ _min to 0,1λ _max, and where λ _min λ _max - gras Itza operating frequency range, wherein the parallel ground mounted pyramid axis along which the front and rear supports are mounted two parallel two-wire supply line from the two power amplifiers.