MICROWAVE HYBRID CIRCUIT, RECEIVING MODULE, TRANSMITTING MODULE AND ACTIVE PHASED ARRAY ANTENNA

摘要

PROBLEM TO BE SOLVED: To realize a small hybrid circuit and also to obtain a microwave hybrid circuit, in which a frequency band to be passed is selective and to which the function of a filter circuit can be attached. SOLUTION: In a 90 deg. hybrid circuit, which has four lowpass filters 9 connected in a ring shape and where input terminals and output terminals are connected to four connections of the lowpass filters 9, a lowpass filter 9 consists of serially connected inductors 1 and a capacitor 2 subjected to shunt connection at the connection of the inductors and has -90 deg. pass phase quantity in a pass frequency, and the attenuation area of the lowpass filter 9 is made to be the frequency of unwanted waves.