| 摘要 |
PURPOSE:To supply a local oscillation signal to two diodes without short-circuit while being inputted to a 90 deg. hybrid even with the ratio of local oscillation signal frequency to intermediate frequency of 3:1 by providing an intermediate frequency short-circuit and local signal open circuit using a capacitor and a tip open line to the position of the two diodes at the side of the 90 deg. hybrid. CONSTITUTION:The intermediate frequency short-circuit and local signal open circuits 5, 5 using capacitors C1, C5 and tip open lines re provided to the two diodes D1, D2 at the side of the 90 deg. hybrid 1. An RF signal inputted from a terminal 1 and a local oscillation signal inputted from a terminal 2 are distributed by the 90 deg. hybrid into two and fed to the diodes D1, D2(3) without being short-circuited by the intermediate frequency short-circuit and local oscillation signal open circuits 5 using the capacitors C1, C2 and the tp open lines even with the ratio of local oscillation signal frequency to intermediate frequency, 3:1, and short-circuited by RF signal short-circuits 4. Further, the intermediate frequency generated by the diodes D1, D2(3) is not propagated in the direction of the 90 deg. hybrid by the intermediate frequency short-circuit and local oscillation signal open circuits 5 but outputted from a terminal 3.
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