Broadband tripolar reconfigurable filter antenna with high gain

Abstract

The invention relates to a broadband tripolar reconfigurable filter antenna with high gain, which belongs to the technical field of antennas. The filter antenna comprises three dielectric substrates,a laminated patch, a driving patch, a feeder part, a coaxial cable and a grounding plate. Three dielectric substrates are laminated. The laminated patch is arranged on the upper surface of the upper dielectric substrate. The driving patch is arranged on the upper surface of the intermediate dielectric substrate. A pair of back-to-back U-shaped grooves is etched on the driving patch. The feeder part comprises a rectangular coupling strip, a metal pillar and a power dividing phase shifting network. The rectangular coupling strip is arranged on the lower surface of the intermediate dielectric substrate. The power dividing phase shifting network is arranged on the upper surface of the lower dielectric substrate. The rectangular coupling strip is connected with the power dividing phase shiftingnetwork through the metal pillar. The grounding plate is arranged on the lower surface of the lower dielectric substrate. The coaxial cable is arranged at the center of the grounding plate. The antenna provided by the invention has the characteristics of simple structure, good frequency selection and out-of-band suppression.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a broadband three-polarization reconfigurable filter antenna with high gain. Background technique [0002] With the rapid development of wireless communication systems, spectrum resources are increasingly scarce, and the electromagnetic environment is becoming more and more complex. Therefore, the polarization reconfigurable antenna that can realize different polarization modes according to the needs of users, because of its ability to increase channel capacity, reduce multipath effects and interference between communication systems, and can use a single antenna to achieve multiple single polarization The polarization method of the antenna has attracted wide attention due to its characteristics such as reducing the size of the system. At the same time, filter antenna design is a new antenna design method that takes into account both the functions of the filter and the antenna. T...

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Problems solved by technology

The filtering function is generally realized by loading a filter or a filtering structure, but this will also reduce the bandwidth of the antenna, seek novel design concepts, and develop a triple-polarized antenna with a compact structure, simple design, easy processing, and wide frequency band. Reconfiguring the filter antenna has become the direction of continuous efforts of the majority of antenna workers

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