Rectangular waveguide dual-mode resonator, waveguide dual-mode filter, dual-mode duplexer

Abstract

The invention discloses a rectangular waveguide dual-mode resonant cavity which comprises a rectangular waveguide single-mode resonant cavity. The upper h-shaped surface and the lower h-shaped surfaceof the rectangular waveguide single-mode resonant cavity protrude respectively upward and downwards to different heights at the same position. A rectangular vertical waveguide with upper end being closed, and a rectangular vertical waveguide with the lower end being closed are formed respectively, and the projection of the two sections of rectangular vertical waveguide on the H surface of the rectangular waveguide single-mode resonant cavity is completely overlapped. The invention further discloses a waveguide dual-mode filter and a dual-mode duplexer. Transmission zero point is achieved through a multi-mode, and the waveguide dual-mode filter has more excellent performance. The waveguide dual-mode filter can work in an E-frequency band or a higher-frequency band. Only a few resonant cavities are needed to achieve the suppression requirement than a common Chebyshev can achieve with more resonant cavities, so that a better insertion loss and a group delay ductility can be achieved. Inaddition, the waveguide dual-mode filter is simpler in structure and lower in manufacturing cost.

Description

technical field [0001] The invention relates to a waveguide double-mode filter, in particular to a waveguide double-mode filter for E-band (E-band) or higher frequency band. Background technique [0002] Due to its high operating frequency, wide frequency band, and abundant spectrum resources, E-band is a research hotspot in 5G communication, and E-band can solve the problem of large-capacity communication. The development of E-band 5G communication base stations is inseparable from high-performance waveguide filters and waveguide duplexers working in this frequency band. [0003] The E-band filter is different from the conventional frequency band filter. Because its operating frequency is 80G, the frequency is very high, the size is small, and it cannot be debugged. The design and processing accuracy of the device are very high. Therefore, it is difficult to improve the out-of-band rejection of the filter and reduce the in-band insertion loss of the filter through limited ...

AI Technical Summary

Problems solved by technology

However, in the E-band frequency band, due to the small size of the device, it is impossible to realize this kind of structure; and because it is an orthogonal mode, as long as the device is divided, it will inevitably cut the current of one of the modes, and the welding method is not used. Therefore, the existing waveguide dual-mode resonator structure is not suitable for the E-band frequency band.

Images