Broadband band-pass filter based on seven-mode resonator

Abstract

The invention discloses a broadband band-pass filter based on a seven-mode resonator. The broadband band-pass filter comprises a first input / output port, a second input / output port, an intermediate layer medium substrate, an upper microstrip structure arranged on the upper surface of the intermediate layer medium substrate, and a bottom metal floor arranged at the bottom surface of the intermediate layer medium substrate. The broadband band-pass filter is characterized in that the upper microstrip structure comprises a first feeding network, a branch-loaded annular seven-mode resonator, and a second feeding network. According to the broadband band-pass filter, the branch-loaded annular multi-mode resonator is employed, seven resonance modes can be provided in the broadband passband frequency range, and the transmission and reflection characteristics are better in the passband; and the annular double-path structure can respectively generate a transmission zero at the upper side and the lower side of the passband so that the passband selectivity of the broadband filter is greatly improved, the integration is easy, and the cost is low.

Description

Technical field [0001] The invention belongs to the technical field of radio frequency filters in wireless communication, and specifically relates to a wideband band pass filter based on a seven-mode resonator. Background technique [0002] With the rapid development of communication technology, people's requirements for wireless communication are not only simple voice communication, but also the pursuit of high-definition video and other large data volume and high confidentiality wireless communication, which makes short-distance high-speed wireless communication the future A direction for the development of wireless communication. Under this application background, broadband wireless communication technology emerged and developed rapidly. Broadband wireless communication system has the characteristics of simple system structure, low cost, low power consumption, high transmission rate, and good confidentiality. It is a research hotspot in the field of wireless communication. A...

AI Technical Summary

Problems solved by technology

For example, the invention patent with the patent publication number CN103855450A proposes a wideband filter implementation method of a ring multimode resonator, which has four resonant modes within the passband frequency range of the filter, and a transmission zero on both sides of the passband to ensure the passband High selectivity characteristics; In the invention patent with the patent publication number CN102610877A, scholars proposed a five-mode resonator based on multi-loaded stubs. The filter has five resonant modes in the passband frequency range, but the passband selection of the filter Sex needs to be improved

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