Broadband feed source antenna based on asymmetric feed

Abstract

The invention relates to the technical field of antennas, and discloses a broadband feed source antenna based on asymmetric feed, which is characterized by comprising a waveguide tube, a horn is arranged at one end of the waveguide tube, a short circuit plate is arranged at the other end of the waveguide tube, and four groups of feed structures are arranged on the waveguide tube. The four groups of feed structures are arranged on the outer side wall of the waveguide tube in an annular array mode, each feed structure comprises a feed end and a conical probe, the conical probes are arranged in the waveguide tube and play a role in disturbing an electromagnetic field in the waveguide tube so that the electromagnetic field can excite a needed field, meanwhile, the conical structures of the conical probes can effectively broaden the matching bandwidth at the feed position, the broadband performance is thus achieved, and due to the fact that in the axial direction of the conical probe, the amplitude phases of electric fields on all surface points are different, the design of the conical probe with the gradually-changed size is adopted, and the matching bandwidth of corresponding ports can be independently widened; uniform-amplitude and anti-phase signals are fed into the feed structures opposite in position, so that the two conical probes opposite in position excite a co-polarization field in the waveguide tube.

Description

technical field [0001] The present invention relates to the technical field of antennas, in particular to a broadband feed antenna based on asymmetric feeding. Background technique [0002] With the development of the communication industry, the antenna, as an important component of radio equipment, plays an important role in the fields of mobile communication, satellite navigation, radar positioning, etc., and the development of high-performance modern antenna technology must rely closely on precise measurement technology and the corresponding test system. Compact field technology refers to the technology that realizes the far-field measurement of antenna parameters or radar target scattering characteristics at a short distance. It is highly respected for its advantages of fast, high precision, and small space required. The reflector antenna is a key part of the compact field technology, and its radiation performance will directly affect the accuracy and reliability of the...

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Problems solved by technology

[0003] The feed antenna is the core part of the reflector antenna. At present, most feed antennas in the market use OMT orthogonal mode couplers to achieve dual polarization performance, which leads to the overall size of the antenna is large, heavy, and the antenna bandwidth is narrow; the design A feed antenna with broadband and symmetrical radiation characteristics is very necessary

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