Turnstile antenna

Abstract

A turnstile antenna comprising vibrators 1 made of metal sheets in the shape of four isosceles triangles arranged crosswise in a horizontal plane with a gap at the center "A", a base 2 and a cable 3, characterized in that the parts of the vibrators 1 remote from the center "A" are bent downwards at an angle of 90-130 degrees and form quadrangular sections 4 of vibrators 1 arranged in a vertical plane.

Description

[0001] The utility model relates to linear type radio antennas, namely broadband antenna systems with horizontal and vertical polarization, which have a circular radiation pattern in a wide frequency band and can be used for transmitting and receiving radio signals in radio navigation systems. STATE OF THE ART

[0002] The closest thing to the claimed utility model in terms of essential features and the technical result achieved is a turnstile antenna with vibrators consisting of metal sheets in the shape of four isosceles triangles arranged crosswise in the same plane and having a gap at the center point ‘A’, a base 3 and a cable 4 (patent RU2643700C1 of 5 February 2018 ‘Turnstile antenna’).

[0003] The disadvantage of the known device is that the vibrators arranged crosswise in one plane give the known antenna the ability to emit and receive an electromagnetic wave only with horizontal orthogonal polarization, which does not allow its use for interaction with antenna systems with vertical polarization of radio waves and therefore significantly limits its technological capabilities. DISCLOSURE OF THE UTILITY MODEL

[0004] The basis of this utility model is the task of creating such a turnstile antenna, the use of which would enable the transmission and reception of an electromagnetic wave not only with horizontal but also with vertical polarization, which would expand the directional pattern of radio signals and thus significantly expand their technological capabilities.

[0005] The stated problem is solved by the fact that, in a turnstile antenna comprising vibrators 1 consisting of metal sheets in the shape of four isosceles triangles arranged crosswise in a horizontal plane with a gap at the center "A," the base 3, and the cable 4, according to the utility model, the parts of the vibrators 1 remote from the center "A" are bent downward at an angle of 90-130 degrees. They form quadrangular sections 5 of the vibrators 1 arranged in a vertical plane.

[0006] The presence of quadrangular sections formed by parts of vibrators bent downwards at an angle of 90-130 degrees, remote from the center point "A" and located in a vertical plane, provides the possibility of additional vertical orthogonal polarization of the electromagnetic wave in the vertical direction.

[0007] Thus, the use of the claimed turnstile antenna provides the possibility of orthogonal polarization of an electromagnetic wave in three directions, which allows expanding the directional pattern of a radio signal and enables its use for interaction with antenna systems with horizontal and vertical polarization of radio waves, which in turn allows expanding the technological capabilities of the antenna and its range of applications.

[0008] In the following, the utility model is explained by a corresponding description of its design with reference to the drawings. - Fig. 1 a turnstile antenna, overall view; - Fig. 2 a turnstile antenna, view from below.

[0009] The turnstile antenna contains vibrators 1 consisting of metal sheets in the shape of four isosceles triangles arranged crosswise in a horizontal plane with a gap at the center point “A”, so that four orthogonally arranged vibrators 1 form two dipoles.

[0010] The vibrators 1 are attached to the base 2 by soldering.

[0011] The vibrators 1 are connected to the coaxial cable 4.

[0012] The parts of the vibrators 1 remote from the center "A" are bent downward at an angle of 90-130 degrees. The city forms quadrangular sections 4 located in a vertical plane.

[0013] The width of the vibrators at the bends is 35 - 45 mm, the height of each triangle that makes up the horizontal part of the vibrators 1 is 50 - 95 mm, and

[0014] The height of the downwardly curved section 5 of each vibrator 1 must be at least 15 mm, which ensures the possibility of emitting and receiving electromagnetic waves of three orthogonal polarizations in a wide frequency range.

[0015] The turnstile antenna is equipped with a bridge balancing device 5 connecting the vibrators 1 to the coaxial cable 4 and consisting of inductive elements 6 formed by induction coils located between two orthogonal vibrators 1.

[0016] The horizontal part of the vibrators 1, which is designed in the shape of isosceles triangles, ensures the transmission and reception of radio waves with orthogonal horizontal polarization.

[0017] The downward curved sections of the 5 vibrators, located in the vertical plane, enable the transmission and reception of radio waves with orthogonal vertical polarization.

[0018] Due to this design, the claimed turnstile antenna offers the possibility of transmitting and receiving radio waves with orthogonal polarization in the horizontal and vertical planes, creating a circular radiation pattern in the operating frequency band.

[0019] Taken together, the claimed design elements ensure stable operation of the antenna in the operating frequency band with the ability to receive and transmit radio signals with horizontal and vertical polarization, which allows its use for interaction with antenna systems with vertical polarization of radio waves and thus significantly expands its technological capabilities.

[0020] The claimed antenna is a narrowband antenna with a circular radiation pattern in the centimeter frequency range. Δf / fthrough.<10% and a broadband antenna with a circular radiation pattern in the decimeter range of operating frequencies Δf / fthrough.>10% where Δf = f max - f min (Difference between the maximum and minimum frequency of the operating frequency band), f durch . - average frequency of the operating frequency band.

[0021] The presence of a bridge balancing device ensures the coordination of the vibrators and allows achieving a standing wave ratio of not more than 1.4 in the entire operating frequency band.

[0022] The described turnstile antenna is easy to manufacture, reliable in use and is characterized by a compact arrangement of the main structural elements, which allows its installation in a radio-transparent protective housing and protects it from mechanical influences and negative effects of various atmospheric phenomena on its operation. LIST OF REFERENCE SYMBOLS 1 vibrators 2 Base 3 coaxial cables 4 curved sections of vibrators 5 Bridge balancing device. 6 Inductive elements QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] RU 2643700C1

[0002]

Claims

[1] A turnstile antenna comprising vibrators 1 made of metal sheets in the form of four isosceles triangles arranged crosswise in a horizontal plane with a gap at the center “A”, a base 2 and a cable 3, characterized by that the parts of the vibrators 1 remote from the center point "A" are bent downwards at an angle of 90-130 degrees and form square sections 4 of vibrators 1 arranged in a vertical plane. [2] The turnstile antenna according to claim, characterized by that it is equipped with a bridge balancing device 5 which is designed in the form of a flat element.

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