Ultra high frequency band pass filter for radar, has microwave strip forming resonant circuits, where filtering line is connected in parallel with circuits to attenuate harmonics of resonance central frequency of circuit

摘要

The filter has a substrate of dielectric material including a metal coated face with a metallic microwave strip (34). The strip is of a specific length and forms a set of adjacent resonant circuits (R1-R6), where each circuit has a resonance central frequency. An inlet line (Le) accesses an ultra high frequency signal to be filtered and an outlet line (Ls) outputs the filtered signal. A filtering line (50) is connected in parallel with the resonant circuits for attenuating the harmonics of resonance central frequency of the circuit.