| 摘要 |
PROBLEM TO BE SOLVED: To provide a 180 deg. hybrid circuit in which a phase difference characteristic being a narrow band is improved and is a wide band in comparison with a conventional rat race type 180 deg. hybrid circuit. SOLUTION: In this 180 deg. hybrid circuit 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 270 deg., a high frequency transmission line 8 where one end is connected to the terminal 2, the other end is connected to a 3rd input-output terminal 3 and electrical length at the frequency f0 is 90 deg., a high frequency transmission line 7 where one end is connected to the terminal 3, the other end is connected to a 4th input-output terminal 4 and an electrical length at the frequency f0 is 90 deg., and a high frequency transmission line 6 where one end is connected to the terminal 4, the other end is connected to the terminal 1 and an electrical length at the frequency f0 is 180 deg., a resonance circuit 10 is connected to the terminal 4 and a 5th input-output terminal 5.
|
