Waveguide Bandstop Filters Based on Microwave Photonic Crystals with Parameters Controlled by n-i-p-i-n Diodes

摘要

A feasible design of a system with an allowed band with near-unity frequency-independent transmission utilizing the reflective properties of photonic crystals with dielectric filling and resonant irises in a setup with a Y-circulator is demonstrated. The existence of impurity modes of oscillation damping in the allowed band of this photonic crystal with disturbed periodicity is confirmed. Bandstop filters with parameters controlled by n-i-p-i-n diodes are constructed based on photonic crystals with resonant irises. These filters have a rejection level of 43.0 dB in the stop band and losses below 0.8 dB outside of it.