Microwave and millimeter wave large-frequency-ratio common-caliber antenna with high isolation

Abstract

The invention discloses a microwave and millimeter wave large-frequency-ratio common-caliber antenna with high isolation. The antenna comprises a 4*4 substrate integrated waveguide back cavity slot array C, a substrate integrated waveguide power dividing feed network N and a low-frequency filtering feed network L. According to the invention, a millimeter wave antenna array and a microwave antenna are integrally designed, millimeter wave and microwave signals are radiated by using the same radiation structure, the aperture utilization rate is high, and miniaturization of a common-aperture antenna is realized; the high-pass characteristic of the substrate integrated waveguide structure is fully utilized, the two microstrip filtering structures are introduced at the same time, the polarization directions of the two antennas are perpendicular to each other, and high port isolation is obtained in the microwave working frequency band and the millimeter wave working frequency band; and the design of the large-frequency-ratio common-caliber antenna is generally complex, and compared with a traditional structure, the topological structure of the microwave and millimeter wave large-frequency-ratio common-caliber antenna is simple, so that the processing cost is lower, and the microwave and millimeter wave large-frequency-ratio common-caliber antenna is easier to implement.

Description

technical field [0001] The invention belongs to the technical field of antenna design, and in particular relates to a microwave and millimeter wave large-frequency-ratio common-aperture antenna structure with high isolation. Background technique [0002] In recent years, with the rapid development of wireless communication technology, 5G communication has become a hot research field. In China, the 5G technology of mainstream operators mainly uses microwave frequency bands including frequency bands such as n41 and n78. However, with the continuous expansion of microwave frequency band system application scenarios, its spectrum resources are becoming more and more crowded. The millimeter-wave frequency band has attracted extensive attention because of its rich spectrum resources and faster data transmission rates. However, millimeter wave technology also has some inherent disadvantages, such as shorter transmission distance and greater susceptibility to interference due to it...

AI Technical Summary

Problems solved by technology

However, in the current research on common-aperture antennas, a pair of signals with relatively small frequencies are often implemented in the same radiation aperture. However, due to the large mutual coupling between the excitation signals of the two frequency bands, the high-frequency-ratio common-aperture antenna requires There is a solution to reduce port isolation, which increases the difficulty and complexity of the design

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