摘要 |
PROBLEM TO BE SOLVED: To realize a 180 deg. hybrid circuit that is small-sized in comparison with that of the conventional technology. SOLUTION: This circuit is provided with a high frequency transmission line 9 where one end is connected to a 1st input-output terminal 1, the other end is connected to a 2nd input-output terminal 2 and an electrical length at a frequency f0 is 90 deg., a 1st lumped constant circuit 8 where one end is connected to the terminal 2 and the other end is connected to a 3rd input-output terminal 3 and which uses an inductor and a capacitor whose phase lead at the frequency f0 is 90 deg., a 2nd lumped constant circuit 7 where one end is connected to the terminal 3 and the other end is connected to a 4th input-output terminal 4 and which uses an inductor and a capacitor whose phase lead at the frequency f0 is 90 deg., and a 3rd lumped constant circuit 6 where one end is connected to the terminal 4 and the other end is connected to the terminal 1 and which uses an inductor and a capacitor whose phase lead at the frequency f0 is 90 deg..
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