| 摘要 |
PURPOSE:To enable to obtain a required phase detection output as well when a signal of double side-band is received, by giving a fixed correlation between line length differences of sum signal line and difference signal line in. CONSTITUTION:A signal received with an antenna 1 enters a monopulse comparator 2 to be separated into a sum signal and a difference signal. Both signals thus separated enter a sum signal mixer 3 and a difference signal mixer 4 respectively and mixed with an output of a local oscillator 5 to be converted into intermediate frequencies respectively. In this case, the sum signal mixer 3 is connected to a sum signal output terminal of the comparator 2 while the difference signal mixer 4 is connected to a difference signal output terminal thereof through a line 7 with a line difference as electric length DELTAlRF added. On the other hand, an intermediate frequency output terminal of the sum signal mixer 3 is connected to one part terminal of a phase detector 6 and the difference signal mixer 4 is connected to the phase detector 6 through a line 8 with a line difference as electric length DELTAlIF added to this line length. This allows an output of the phase detector to be bipolar by a signal of double side-band.
|
