Ku/Ka waveband double-frequency conical beam horn antenna

Abstract

The invention discloses a Ku / Ka waveband double-frequency conical wave beam horn antenna. The antenna comprises a double-frequency radiation module and a feed module. The double-frequency radiation module adopts a nested horn structure; the double-frequency radiation module specifically comprises a circular waveguide horn and a coaxial horn nested outside the circular waveguide horn, the working frequency band of the circular waveguide horn is a Ka wave band and used for radiating Ka wave band signals, the working frequency band of the coaxial horn is a Ku wave band and used for radiating Ku wave band signals, and the feeding module is used for feeding the double-frequency radiation module. The radiation pattern of the antenna has conical wave beam characteristics in Ku / Ka wave bands.

Description

technical field [0001] The invention belongs to antenna technology, in particular to a Ku / Ka band dual-frequency conical beam horn antenna. Background technique [0002] The cone beam antenna is a kind of antenna with omnidirectional radiation in the azimuth plane, and the maximum radiation direction of the elevation plane forms a certain cone angle with the normal direction, and the radiation in the normal direction is very small. When detecting air targets, in order to find targets in all directions in time, generally three methods can be adopted: use a higher-gain array antenna for automatic tracking; use a three-dimensional omnidirectional antenna for receiving and transmitting; use a conical beam antenna to Irradiate an area within a certain range of cone angles. The complexity of the array antenna automatic tracking system is very high, and the cost remains high; although the omnidirectional antenna can realize target tracking from all angles, the gain is low. In con...

AI Technical Summary

Problems solved by technology

The traditional dual-band antenna design mostly uses a coupling branch structure to separate the two frequency bands. The disadvantage of this type of design is that the interval between the two frequency bands is strictly limited, and the antenna has a long longitudinal length and high mass, which does not meet the needs of small size, light weight requirements

[0005] Document 3 (Shi-Shan Qi, Wen Wu and Da-Gang Fang. Dual / Single Band Conical-Beam Nested Horn Antennas with Dual / Single Pointing Angles[J]. IEEE Transactions on Antennas and Propagation, 2012,60(10):4911 -2915.) The coaxial nested structure is used to realize the X / Ka dual-band conical beam antenna, but the relative bandwidth of the X / Ka antenna is less than 10%, which has the disadvantage of narrow impedance bandwidth

At the same time, the X-band antenna feeds through the rectangular converter to excite the TEM mode in the coaxial cavity, and the feeding structure is complex

Images