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Circularly polarized ridge waveguide slot antenna

A slot antenna and ridge waveguide technology, applied in slot antennas, antennas, antenna arrays, etc., can solve the problem of high height of circularly polarized antennas, and achieve the effects of reduced processing difficulty, reduced profile height, and reduced costs

Active Publication Date: 2016-04-13
BEIJING RES INST OF TELEMETRY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of circularly polarized antenna is usually very tall and not suitable for occasions where space is limited

Method used

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  • Circularly polarized ridge waveguide slot antenna
  • Circularly polarized ridge waveguide slot antenna
  • Circularly polarized ridge waveguide slot antenna

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0024] Such as figure 1 As shown, the present invention includes a circularly polarized radiator 1, a twisted polarization cavity 2, an excitation slot 3 and a ridge waveguide 4, wherein the ridge waveguide is composed of a metal ridge 41 and a waveguide 42;

[0025] The metal ridge 41 is located on the bottom surface of the waveguide 42, and an excitation slot 3 is opened on the upper surface of the waveguide 42 for sending the energy in the ridge waveguide 4 into the twisted polarization cavity 2; the twisted polarization cavity 2 has two ports One port is connected to the excitation slot 3 to receive the signal of the first polarization state radiated by the excitation slot 3, and the other port is connected to the circular polarization radiator 1 to radiate the signal with the changed polarization state.

[0026] Such as figure 2 Shown is...

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Abstract

The invention discloses a circularly polarized ridge waveguide slot antenna. The circularly polarized ridge waveguide slot antenna comprises circularly polarized radiators, twist polarized cavities, excitation slots and a ridge waveguide, wherein the ridge waveguide comprises a metal ridge and a waveguide, the metal ridge is arranged on the bottom surface of the waveguide, the excitation slots are formed on the upper surface of the waveguide and used for transmitting energy in the ridge waveguide to the twist polarized cavities, one of the two twist polarized cavities is connected with the excitation slot and used for receiving a signal of a first polarization state radiated by the excitation slot, and the other polarized cavities is connected with the circularly polarized radiators and used for radiating the signal with the changed state out. The circularly polarized ridge waveguide slot antenna has the advantages of low profile, high efficiency and compact structure, is easy to process, can be taken as an array combination unit of a co-aperture dual circular polarization antenna or circularly polarized phased-array antenna, and is suitably used for airborne or satellite-borne occasions with limited requirement for weight and space.

Description

technical field [0001] The invention relates to a circularly polarized ridge waveguide slot antenna, which can be used as an array unit of a large phased array antenna and belongs to the technical field of waveguide slot antennas. Background technique [0002] The waveguide slot antenna has been widely used in missile-borne and airborne radar equipment due to its many advantages such as high radiation efficiency, compact structure, easy realization of low sidelobes, and stable and reliable performance. [0003] The position and orientation of the slot as the radiation element in the waveguide slot antenna is fixed, so the radiation polarization of the slot element is also fixed, so a pair of waveguide slot antenna usually can only provide one polarization. Previously, a circularly polarized traveling-wave waveguide slot antenna was formed by opening cross slots on the surface of the waveguide. The beam pointing of this antenna shifts with frequency, which is difficult to app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/50H01Q15/24H01Q13/06H01Q13/10H01Q21/00
Inventor 孟明霞丁晓磊丁克乾
Owner BEIJING RES INST OF TELEMETRY
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