Low-profile filtering antenna based on metasurface structure

Abstract

The invention provides a low-profile filtering antenna based on a metasurface structure. The low-profile filtering antenna comprises a first dielectric layer and a second dielectric layer, the metasurface structure is arranged on the upper surface of the first dielectric layer, a metal floor layer is arranged on the upper surface of the second dielectric layer, and a microstrip feeder is arrangedon the lower surface of the second dielectric layer; short-circuit probes are embedded in the first dielectric layer and the second dielectric layer, and the metasurface structure is composed of sevenpatches including slotted rectangular patches, non-slotted rectangular patches and square patches. A stepped groove is formed in the center of the metal floor layer; the microstrip feeder line on thelower surface of the second dielectric layer generates coupled feed through the stepped groove in the metal floor and the metasurface structure on the upper surface of the first dielectric layer; theantenna is low in profile, simple in structure and free of feeder loss, and has good radiation performance and filtering performance. The average gain in an antenna passband can reach 9dBi, the low-frequency out-of-band rejection is at least 26dB, the high-frequency out-of-band rejection is at least 20dB, and the total profile is 0.04 lambda 0.

Description

technical field [0001] The invention relates to the technical field of microwave devices, in particular to a low-profile filter antenna based on a metasurface structure. Background technique [0002] With the rapid development of wireless communication technology, a variety of mobile terminal equipment emerges as the times require. For these equipment, antenna and filter are two indispensable components that make up the RF front end, and also occupy a considerable part of the equipment. space area. As the entrance and exit of electromagnetic waves propagating in space, the antenna is used to transmit and receive electromagnetic wave signals. The filter is used as a frequency selector for channel selection, frequency selection, and filtering out unwanted spurious signals outside the band, thereby effectively improving the anti-interference ability of the entire communication system. [0003] Reasonable integration of the two can reduce the system area of ​​the device while ...

AI Technical Summary

Problems solved by technology

However, some of these methods will make the antenna have disadvantages such as high profile, complex design structure and poor passband radiation performance.

Images