High isolation dual polarization decoupling anti-interference antenna array

Abstract

The invention provides a high isolation dual polarization decoupling anti-interference antenna array. The two sides of a lower layer dielectric substrate are coated with copper; a lower layer feed network consists of a 180-degree power division phase-shift network and a zero-phase feeder, and the input end is connected to radio frequency cables; a single side of an upper layer dielectric substrateis coated with the copper, and the upper surface is an upper layer radiation patch; one ends of feed probes are welded with three output ports of the lower layer feed network of the lower layer dielectric substrate, and the other ends of the feed probes are welded with the upper layer radiation patch of the upper layer dielectric substrate; two dual polarized antenna array elements and multiple dielectric wave absorbers are fixed on an antenna base plate; and the multiple dielectric wave absorbers are equidistantly distributed on the two sides which take the center connecting line of the twodual polarized antenna array elements as an axis. Thus, good polarization isolation can be obtained; and abilities to resist interference in three different directions can be realized by adopting a space-time adaptive anti-interference algorithm, so that the size of an anti-interference antenna array surface can be greatly reduced, and the food electrical performance of the antenna array elementscan be guaranteed.

Description

technical field [0001] The invention relates to an anti-jamming antenna array, which is used for signal reception in a satellite navigation anti-jamming environment. Background technique [0002] With the continuous development of satellite navigation technology, various mobile and portable satellite navigation terminals have sprung up. As the front-end component of the communication equipment, the satellite guide receiving antenna plays a vital role in the communication quality. Because the power level of my country's Beidou navigation satellite signal reaching the ground is very low, its anti-interference ability is poor, and it is extremely susceptible to interference from man-made jammers or space noise. In order to solve this problem, the system usually adopts a multi-antenna unit array and synthesizes in the interference direction to realize beam nulling. [0003] Using space-time adaptive processing technology to suppress interference from N-1 different directions r...

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Problems solved by technology

[0004] The center spacing of the elements of the traditional anti-jamming antenna array should be slightly less than one-half wavelength of the working center frequency. When the center spacing is taken as one-quarter wavelength of the center frequency, the mutual coupling between the antenna elements is strong, and the electrical performance Affected, resulting in a serious decline in system anti-jamming indicators

[0005] At present, domestic and foreign university scholars have carried out a lot of research in the direction of space-time adaptive anti-jamming technology and antenna decoupling technology, but the engineering realization of applying high-isolation dual-polarized antennas combined with decoupling technology to the field of satellite navigation anti-jamming technology has not yet been completed. no relevant studies

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