Implementation method of high-gain omnidirectional biconical antenna array

Abstract

The invention relates to an implementation method of a high-gain omnidirectional biconical antenna array. The implementation method is mainly used for improving the omnidirectional degree of an omnidirectional antenna in a broadband range and acquiring a pitching wave beam with good in-band consistency at the same time. The high-gain omnidirectional biconical antenna array is composed of a plurality of cylindrical loading special-shaped sleeve biconical antenna units arrayed by pitching surfaces and an array feeder, wherein the top of a cone of each sleeve biconical antenna unit is provided with a cylindrical load so as to improve an in-band voltage standing wave ratio; each array unit is directly excited through a coaxial line, an inner conductor of the coaxial line is connected with an upper half cone of the unit, and an outer conductor is connected with a lower half cone; one upper biconical antenna feed coaxial line passes through the inner conductor of one lower unit feed coaxial line in sequence to form a nested coaxial line, and feed structures do not interfere with each other; and the nested coaxial line is converted into an independent feed connector through a coaxial ridge waveguide conversion pair below the coaxial line. The method is suitable for design and implementation of the high-gain omnidirectional biconical antenna array.

Description

technical field [0001] The invention belongs to the technical direction of communication, radar antenna and microwave. Background technique [0002] In general, the antenna is required to have a large antenna gain in the desired specific angular direction, while other undesired directions have low sidelobes or even no ability to radiate. As a special type of antenna, the omnidirectional antenna requires omnidirectional beam coverage in the azimuth plane, and at the same time has a constant beam pointing or specific coverage in the band on the elevation plane, which is often impossible to achieve with a single antenna, which requires the use of The design idea of ​​the antenna array is to reasonably configure the amplitude and phase of each omnidirectional antenna unit to maintain the azimuth and omnidirectional while improving the antenna gain and achieving specific elevation coverage. [0003] The existing high-gain omnidirectional antennas are implemented in the following...

AI Technical Summary

Problems solved by technology

[0003] The existing high-gain omnidirectional antennas are implemented in the following ways: multiple high-gain wide-coverage antennas are used to synthesize omnidirectional antennas in the azimuth plane, and multiple omnidirectional antenna units are arrayed in series or parallel feed , a typical high-gain series-fed omnidirectional antenna such as "COCO" antenna, its elevation beam pointing will change with frequency within the bandwidth; while using conventional parallel feed, the amplitude and phase of each unit are independently controllable, and the elevation beam The shape can be configured arbitrarily, but when the feeder passes near the antenna, it will have a significant impact on the antenna pattern: when the feeder passes near the omnidirectional antenna, it will greatly affect the omnidirectionality of the azimuth pattern, and its out-of-roundness will deteriorate by up to More than 3dB, which seriously affects the practical application of the antenna

Images