Broadband dielectric resonator filtering antenna based on multimode resonator

Abstract

The invention discloses a broadband dielectric resonator filtering antenna based on a multimode resonator, and the broadband dielectric resonator filtering antenna comprises a dielectric resonator antenna, a metal floor, a dielectric substrate, a microstrip feeder line and the multimode resonator, the metal floor is attached to the upper surface of the dielectric substrate, and the dielectric resonator antenna is arranged right above the metal floor, a rectangular gap is etched in the center of the metal floor, the microstrip feeder line and the multimode resonator are attached to the lower surface of the dielectric substrate, the multimode broadband resonator is loaded on the microstrip feeder line, five modes are excited at the same time to achieve the broadband effect, the filtering effect can be achieved by loading the multimode broadband resonator on the microstrip feeder line, and the out-of-band rejection effect is good. The antenna has quasi-elliptic function band-pass response, and is simple in structure and high in integration degree, the 10dB impedance bandwidth of the antenna can reach 32%, the in-band average gain is 9.3dBi, the out-of-band rejection exceeds 20dB, and different bandwidth and frequency band characteristics can be realized by adjusting the sizes of the antenna and the resonator.

Description

technical field [0001] The invention relates to the technical field of filter antennas for wireless mobile communications, in particular to a broadband dielectric resonator filter antenna based on a multimode resonator. Background technique [0002] In wireless communication systems, antennas and filters have always been two very important parts of the RF front-end. Usually, the method of separate design is adopted, and then the two are connected together through a matching circuit, resulting in an increase in the size of the entire module, which is very unfavorable for the RF front-end with limited space, and will affect the filtering effect. In order to solve these problems, the filter and antenna are integrated as a module. [0003] A co-design approach using filter and antenna integration enables the direct connection of the antenna and filter without the need to assign to a standard 50Ω port. To a certain extent, the size of the entire module is reduced to avoid the l...

AI Technical Summary

Problems solved by technology

Usually, the method of separate design is adopted, and then the two are connected together through a matching circuit, resulting in an increase in the size of the entire module, which is very unfavorable for the RF front-end with limited space, and will affect the filtering effect. In order to solve these problems, the filter and antenna are integrated as a module

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