Magnetoelectric dipole filter antenna with approximate elliptical filter response

Abstract

The invention belongs to the technical field of wireless communication, and discloses a magnetoelectric dipole filter antenna with an approximate elliptical filter response. A feed structure comprisesa coupling groove printed on the upper layer of a double-sided copper-clad dielectric plate, and a fork-shaped microstrip power divider and a U-shaped short circuit branch printed on the lower layerof a double-sided copper-clad dielectric plate with a thickness of 1 mm; the radiation structure includes a radiation patch, a coupling branch, and a vertical short circuit wall; the radiation patch and the coupling branch are respectively printed on the upper layer and the lower layer of a double-sided copper-clad dielectric plate with a thickness of 1.5 mm; and the vertical short circuit wall isprinted on two one-sided copper-clad dielectric plates with a thickness of 0.5 mm. The magnetoelectric dipole filter antenna with an approximate elliptical filter response is realized, and a good filter frequency response is realized. The magnetoelectric dipole filter antenna with the approximate elliptical filter response disclosed the invention greatly expands the application of the magnetoelectric dipole antenna in the field of filter antennas.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to a magnetoelectric dipole filter antenna with approximately ellipse filter response. Background technique [0002] At present, the closest prior art: the methods for implementing filter antennas in the industry mainly include the following: first, an antenna radiator is used to replace the last-order resonator of a bandpass filter to implement a filter antenna. Based on the principle of filter synthesis, the bandpass filter needs to be designed in advance. Although this method can achieve a good filter response, the insertion loss introduced by the multi-order resonator in the bandpass filter reduces the radiation gain of the antenna. In order to solve this problem, a design method of a filter antenna without using an additional filter circuit is proposed. It includes two aspects, on the one hand, introducing a resonant structure in the antenna feed network, and o...

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Problems solved by technology

[0004] (1) In the existing filter antenna designed based on the principle of filter synthesis, the multi-order resonator in the filter introduces a large insertion loss and reduces the gain of the antenna; by introducing a resonant structure into the antenna radiator or feed network, the feed The complexity of the electrical network affects the radiation pattern of the antenna.

[0005] (2) The cross-coupling design method, due to the need to create a cross-coupling path, is only applicable to a specific antenna form, and its scope of application is limited

[0006] (3) For filter antennas designed based on the principle of radiation cancellation, the radiation pattern may deteriorate

[0007] (4) The bandwidth of the existing filter antenna is not wide enough to meet the broadband requirements of modern wireless communication

[0008] The difficulty of solving the above technical problems: to solve the problem of large insertion loss and reduce the antenna gain, the key is not to introduce multi-order filters under the premise of realizing the filter response; to solve the problem of narrow bandwidth, the key is to choose the antenna form with wide bandwidth to realize the filter antenna

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