Dielectric-loaded based ultra wide band compact field feed source

A technology of compact field feed and medium loading, applied in electrical components, transmission systems, waveguide horns, etc., can solve the problem of inability to compact field feed, and achieve the effect of improving test efficiency, avoiding main lobe splitting and low cost

Active Publication Date: 2016-04-06
BEIHANG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, like most of the literature on ridge horns, there is no strict control on the amplitude pattern

Method used

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  • Dielectric-loaded based ultra wide band compact field feed source
  • Dielectric-loaded based ultra wide band compact field feed source
  • Dielectric-loaded based ultra wide band compact field feed source

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[0027] Design of the present invention is as follows: the present invention has good impedance bandwidth according to the four-ridge horn antenna, better pattern, through the mouth size of the ridge waveguide horn, axial length, ridge waveguide thickness, ridge spacing, ridge curve, ridge The design of key dimensions such as the waveguide size and the distance between the ridge and the back cavity enables the designed ridge waveguide horn to obtain the widest possible impedance bandwidth under two vertical polarizations, and then introduce PTFE loading. After adding polytetrafluoroethylene, the low-frequency cutoff frequency of the ridge waveguide horn is further reduced. By rationally designing the insertion position of polytetrafluoroethylene, the high-frequency radiation electric field can be concentrated on the dielectric structure without excessively deteriorating the impedance characteristics of the four-ridge horn. In this way, the splitting of the high-frequency pattern...

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Abstract

The invention relates to a dielectric-loaded based ultra wide band compact field feed source. The ultra wide band compact field feed source comprises an improved dielectric-loaded horn antenna (1), a supporting column (2), a flange plate (3) and a wave-absorbing material (4), wherein a ridge waveguide part is matched with a ridge curve of a horn for increasing the thickness of a ridge (5) to the maximum; two semi rigid coaxial cable electric connectors connected by an SMA connector are adopted as feed probes, and the diameter of the cable is less than 2 mm; the two feed probes are perpendicularly mounted, and are corresponding to two polarities of the feed source respectively; the radiation electric field of the feed source antenna can be concentrated to a dielectric region as far as possible by optimizing the shape of the dielectric-loaded material and the relative position of a four-ridge horn antenna for stabilizing the phase center; the supporting column of a certain length is arranged behind the dielectric-loaded horn antenna to enable the dielectric-loaded horn antenna aperture to be far from a feed source bracket; the wave-absorbing material of a specific size is added at the bottom of the supporting column for restraining multiple times of radiation caused by a complex metal structure of the feed source bracket; and the dielectric-loaded based ultra wide band compact field feed source has the outstanding advantages of small size, light quality and low cost.

Description

technical field [0001] The invention relates to the technical field of a compact field feed source, in particular to an ultra-wideband compact field feed source based on medium loading. Background technique [0002] With the continuous development of compact field technology, the test efficiency of compact field system has been continuously improved, and the speed of both sweep frequency measurement and spot frequency measurement has been greatly improved. Therefore, the original standard band feed cannot meet the requirements of compact field measurement. requirements. Broadband compact field feeds will become an essential measurement tool for future compact field systems. There are many alternative antennas that can be used as ultra-broadband compact field antennas. Among them, the ridge waveguide horn has a wide impedance bandwidth and has the potential to be used as a compact field feed source objectively. However, the pattern of the ridge waveguide horn varies greatly ...

Claims

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Application Information

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IPC IPC(8): H01Q13/02H04B1/00
CPCH01Q13/0275H04B1/00
Inventor 王正鹏李志平武建华
Owner BEIHANG UNIV
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