SU1305805A1 - Turnstile aerial - Google Patents

Abstract

The invention provides a pattern distribution (DN) and an increase in the operating frequency range. Symmetric vibrators (SB) 1, 2 with inclined arms are installed in planes perpendicular to each other and orthogonal to the metal screen 3. The circularly polarized electromagnetic field induces in CF 1, 2 a useful signal that passes through the balancing device 4 and it is released at the output of a three-bi-directional directional coupler 5. This same electromagnetic field excites in pairs of passive vertical matrix matrix vibrators (PVNV) 6 currents that generate radiation along the metal screen. The interaction of the fields CB 1, 2 and PVNV 6 provides for the expansion of the beam and an increase in the operating frequency range of the turnstile antenna. This is achieved by introducing two pairs of PVNV 6 located coaxially and symmetrically with CB 1, 2 and having certain dimensions. 2 Il. (L: AE o JV x o O Fig, 2

Description

The invention relates to radio engineering, in particular to circular polarization antennas.

The aim of the invention is to expand the radiation pattern and increase the operating frequency range.

FIG. 1 shows a structural diagram of a turnstile antenna, side view, in FIG. 2-- same top view

The turnstile antenna contains two symmetrical vibrators 1 and 2 with inclined arms installed in the first and second mutually perpendicular planes orthogonal to the metal screen 3. The outputs of both symmetric vibrators 1 and 2 with inclined arms are connected via a balancing device 4 to the outputs of a three-decoupled directional response engine 5. In the first and second orthogonal planes coaxially and symmetrically with symmetrical vibrators 1 and 2 with inclined arms, two pairs of passive vertical non-symmetric ones are installed. 6 vibrators.

Turnstile antenna works in the following way.

A circularly polarized electromagnetic field induces on a symmetric vibrators 1 and 2 a useful signal that passes through a balancing device 4 and is outputted by a directional coupler 5. This same electromagnetic field excites in pairs of passive vertical asymmetric vibrators 6 currents that produce radiation along a metallic screen 3. As a result, the interaction of the fields of symmetrical vibrators 1 and 2 and passive vertical asymmetrical

five

0

0

vibrators b provides expansion of the radiation pattern and an increase in the operating frequency range of the turnstile antenna with a length of .8 passive vertical asymmetrical vibrators 6, selected from a ratio of 0.22, oj distance d between them 0.34 -I d 0 and the length of the inclined shoulder symmetrical vibrator, 0 ,.), where - the minimum wavelength of the working range.

Claims (1)

Invention Formula A turnstile antenna containing two symmetric vibrators with inclined shoulders installed in the first and second planes, which are mutually perpendicular and orthotonally metal screen connected through a balancing device to the output shoulders of a three-junctional directional coupler that differs from In order to expand the directivity pattern and increase the operating frequency range, two pairs of passive vertical asymmetric vibrators installed in the first and second pl The bristles are symmetrical with respect to their line of intersection, while the length of passive vertical asymmetrical vibrators is chosen from the ratio 5 0.17 L о 1 0, and the distance d between them in each pair is selected from the ratio 0.34 d 6 0, (,, moreover, the length of the inclined shoulder of the raviya 0.15 Lo symmetrical vibrators, where Hell is the minimum wavelength of the working range. 0 five 2 Editor O. Yurkovetska Order 1463/53 Compiled by O.Troshko Tehred A. Kravchuk Proofreader A.Zimokosov Circulation 626 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab, 4/5 Production and printing company, Uzhgorod, Projecto st., 4 1