A Dielectric Filter Antenna with Dual Polarization and Dual Bands

Abstract

The invention discloses a dual-polarization dual-band dielectric filter antenna, which sequentially comprises a cross-shaped dielectric block on the top layer, an upper dielectric substrate, a middle metal structure, a lower dielectric substrate and a bottom metal structure. The underlying metal structure includes a horizontally arranged microstrip feeder, a first three-branch dual-mode microstrip resonator, a vertically placed microstrip feeder, and a second three-branch dual-mode microstrip resonator. The cross dielectric block, the upper dielectric substrate and the middle metal structure form a cross dielectric patch resonator. The odd-mode and coupled-mode signals of the first three-branch dual-mode microstrip resonator respectively excite the TMx of the cross dielectric patch resonator δ1 Die and TMx δ3 mode, forming horizontally polarized dual-frequency filtered radiation. The odd-mode and coupled-mode signals of the second three-branch dual-mode microstrip resonator respectively excite the TMy of the cross dielectric patch resonator δ1 Die and TMy δ3 mode, forming vertically polarized dual-frequency filtered radiation.

Description

technical field [0001] The invention relates to various microwave communication fields, in particular to a dual-polarization dual-band dielectric filter antenna. Background technique [0002] The filter antenna integrates the filtering function and the radiation function, which can effectively improve the integration of the system and conform to the development trend of high integration, low loss and miniaturization of the wireless communication system. The use of dielectrics to realize dielectric filter antennas can effectively improve the design freedom of filter antennas, reduce conductor losses and improve efficiency. From the working frequency band of the filter antenna, the dual-band filter antenna is more suitable for multi-standard systems than the single-band filter antenna, but the design is more difficult. In addition, applying the dual-polarization function to the dual-band filter antenna can effectively resist multipath fading and improve the receiving and send...

AI Technical Summary

Problems solved by technology

However, the existing dual-polarized dielectric filter antennas all work in a single frequency band, which cannot meet the needs of multi-standard or multi-band systems

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