A square-slot structure microwave filter with dual-band operation characteristics

Abstract

The invention discloses a square-slot structure microwave filter with dual-frequency band working characteristics, which comprises a dielectric plate, wherein one surface of the dielectric plate is provided with a metal microstrip and the other surface is provided with a metal ground; The metal microstrip is structured as follows: an artificial surface plasmon segment is arranged in the middle ofthe metal microstrip, and two ends of the artificial surface plasmon segment are respectively connected with the microstrip waveguide segment through a transition section; The artificial surface plasmon section and the transition section are provided with hollow square grooves along the length direction of the metal microstrip, and the adjacent two square grooves are connected with each other through the hollow square grooves. The upper and lower edges of the square groove in the transition section are curves that converge gradually along the transition section to the direction of the microstrip waveguide section. The invention has the advantages of low transmission loss, small reflection characteristic, excellent out-of-band rejection performance and strong electromagnetic interference resistance, and is suitable for the characteristics of high-frequency integrated circuits.

Description

technical field [0001] The invention relates to the technical field of filters, in particular to a square-slot microwave filter with dual-band operating characteristics. Background technique [0002] In today's big data era, with the explosive growth of information demand, the field of mobile communication requires the manufacture of microwave devices with higher integration. However, as the size of high-frequency integrated circuits continues to shrink, a series of technological Problems, such as when the size of the microwave device is small to a certain extent, the electromagnetic interference noise and RC delay of the device reach the limit, resulting in unstable operation of the device, so the existing microwave devices can no longer adapt to the development of today's large-scale microwave integrated circuits. Contents of the invention [0003] The object of the present invention is to provide a microwave filter with a square slot structure with dual-band operating c...

AI Technical Summary

Problems solved by technology

[0002] In today's big data era, with the explosive growth of information demand, the field of mobile communication requires the manufacture of microwave devices with higher integration. However, as the size of high-frequency integrated circuits continues to shrink, a series of technological Problems, such as when the size of the microwave device is small to a certain extent, the electromagnetic interference noise of the device, RC delay, etc. reach the limit, resulting in unstable operation of the device, so the existing microwave devices can no longer adapt to the development of today's large-scale microwave integrated circuits

Images