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A Backfiring Broadband Circularly Polarized Feed Source

A circular polarization and feeder technology, applied in the field of microwave antenna feeder, can solve the problems of electric small-sized mouth-face shielding, feeder insertion loss, etc., to reduce shielding, wide circular polarization axis ratio bandwidth, and improve mouth-face efficiency Effect

Active Publication Date: 2017-06-30
INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for an electrically small-sized reflector antenna, if the feedforward feeding method is used, the feeder line will be longer, not only the insertion loss of the feeder line will be large, but also the mating surface of the feeder line will be blocked to a certain extent. The feed-back mode of the Lun antenna, the sub-reflector will cause a large shield to the small size of the mouth

Method used

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  • A Backfiring Broadband Circularly Polarized Feed Source
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  • A Backfiring Broadband Circularly Polarized Feed Source

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Embodiment

[0032] According to the above invention scheme, a back-firing broadband circularly polarized feed rate microwave feed source with an operating frequency range of 2.3GHz~3.4GHz is designed, wherein the metal conductor parts are made of brass; the dielectric filling materials a and c are polymer Tetrafluoroethylene (εr=2.1), the medium filling b material is nylon (εr=3.2), and the tapered medium support is hard foam material for radio frequency (εr≈1).

[0033] Carry out full electromagnetic wave simulation analysis on the feed source simulation of the above design, the reflection coefficient curve is as follows Figure 4 As shown, the reflection coefficient S in the working frequency range of 2.3GHz~3.4GHz 11 Both are lower than 14dB, and the relative bandwidth reaches 40%. By comparing the directions of the feed sources at four typical frequency points, it can be seen that the direction diagrams of the feed sources are all in the back-firing direction, and the gain is also ba...

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Abstract

The invention discloses a back-firing broadband circularly polarized feed source, which includes a feed source support, a radio frequency connector, a choke coaxial outer cylinder and a cone-shaped dielectric support, and one end of the feed source support is connected to the antenna through a screw. The inner arc surface is fixedly connected, and the other end of the feed source support is connected to the choke coaxial outer cylinder through screws; one end of the choke coaxial outer cylinder extends into the feed source support, and the other end of the choke coaxial outer cylinder is connected to the cone Taper port connection supported by cylindrical medium; the RF connector is set in the choke coaxial outer cylinder, one end of the RF connector is connected to the coaxial inner core, and the coaxial inner core passes through the choke coaxial outer cylinder and connects with the tapered cylindrical medium Conductor connection within the support. Through the present invention, the reflector antenna can adopt the feed-back method to reduce the length of the feeder line and the insertion loss, and at the same time, the sub-reflector is not needed, and the shielding of the mouth surface by the sub-reflector is avoided, so that the efficiency of the mouth surface is improved.

Description

[0001] A Backfiring Broadband Circularly Polarized Feed Source technical field [0002] The invention belongs to the technical field of microwave antenna feeder, and specifically refers to a back-firing broadband circularly polarized feeder used for feeding power to a small-diameter reflective surface. Background technique [0003] All-solid-state microwave sources have the advantages of small size, light weight, easy maintenance, high reliability, and high efficiency, and have gradually replaced electric vacuum tubes in many application fields. When using a large-aperture reflector antenna to radiate high-power microwaves from solid-state sources, it will face the difficulties of large-aperture reflector antenna processing difficulty and high cost, and multiple solid-state microwave sources are synthesized first and then emitted, and there are also problems such as high loss. Therefore, using multiple single-module solid-state microwave source-fed electric small-aperture re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/36H01Q1/50H01Q1/12H01Q7/00
Inventor 徐刚屈劲许州胡进光余川李才阳施美友陈世韬
Owner INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS