Miniaturized ridge waveguide 5G dual-band bandpass filter with controllable zero point

Abstract

The invention discloses a miniaturized ridge waveguide 5G dual-band bandpass filter with controllable zero point. The invention includes three sets of non-contact ridge waveguides arranged in the metal cavity, and a transverse ridge waveguide for zero point control; a transverse ridge waveguide for zero point control is externally connected to the input path, which passes through the first longitudinal ridge waveguide The waveguide is connected with the first group of ridge waveguides that control the high frequency; the height of the first longitudinal ridge waveguide is the same as that of the first group of ridge waveguides, and when it is in a specific position, it will not affect the low frequency and enhance the coupling, so that Its amplitude is zero at a specific frequency point in the high frequency band. The ridge structure is used to complete the signal transmission and coupling, which realizes the miniaturization of the dual-frequency filter, and because the ridge waveguide has a fairly wide spurious-free operating frequency window, which allows broadband filtering, the filter has completed 2.515GHz Low insertion loss dual passband filtering for ‑2.675GHz and 3.6GHz‑3.8GHz.

Description

technical field [0001] The invention belongs to the technical field of microwave devices, in particular to a dual-frequency filter designed by utilizing ridge waveguides and zero-point control grooves. Background technique [0002] With the rapid development of wireless communication technology towards high speed, broadband and large capacity, such as the emerging 5G technology, the demand for dual-band or even multi-band filters is also increasing. The current cross-coupled filter uses cross-coupling to introduce a limited transmission zero point, and the performance can meet the requirements, but it is difficult to independently control the resonant frequency of each passband, and the zero point is affected by the overall filter structure, and cannot be modularized. And debugging, bring inconvenience to the project. Although the substrate integrated waveguide filter is small in size, low in cost, and the frequency band can meet the requirements, the insertion loss is rela...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to design a new type of miniaturized ridge waveguide 5G dual-band due to the defect that the existing dual-frequency filter cannot realize the controllable zero point, and there is no dual-passband filter of 2.515GHz-2.675GHz and 3.6GHz-3.8GHz pass filter

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