Filter type slot antenna

Abstract

The invention relates to a filter type slot antenna. The filter type slot antenna comprises a dielectric plate, an input port, a microstrip line, a half-wavelength line resonator, an open branch, anda slot between a defect grounding structure and a grounding plane; the input port is disposed on the dielectric plate, and the slot is divided a first sub-slot and a second sub-slot; the microstrip line is disposed on a bottom layer of the dielectric plate, and the resonant frequency is generated by the half-wavelength line resonator loaded on the second sub-slot to obtain a dual-band filtering characteristic; and the open branch is placed on the half-wavelength line resonator, and the response frequency of the input port is increased; the slot formed in the grounding plane is used to radiateelectromagnetic waves; and the defect grounding structure is loaded on the input port, which enhances the electromagnetic coupling of the input port. The filter type slot antenna formed by integratingthe half-wavelength line resonator and the antenna described above is used, so that the size of the filter type slot antenna is smaller when the impedance in the antenna band is matched, and the effect of reducing the return loss is achieved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a filter type slot antenna. Background technique [0002] With the rapid development of science and technology, the development of science and technology has driven the development of wireless communication technology. People's requirements for wireless communication quality are getting higher and higher. Modern wireless communication systems are developing towards miniaturization. From the previous long external antenna to The current built-in antenna, wireless communication is developing towards intelligence. In order to make the size of the wireless communication system smaller and have good filtering characteristics, it is necessary to combine the antenna with the filtering unit, so that the filter antenna formed has better filtering characteristics. and radiation properties. [0003] In the existing filter antenna, the filter unit and the radiation unit are designed ...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the purpose of the present invention is to overcome the deficiencies of the prior art and provide a filter-type slot antenna. In order to solve the impedance matching in the antenna frequency band, the size of the filter-type slot antenna is large and the problem of large return loss

Images