| 摘要 |
PURPOSE:To change a monopulse antenna into a multibeam and interference eliminating antenna, by disposing a transmission/reception separating circuit between monopulse synthesizers, providing a switching device for three terminals of the output of synthesizers and controlling the switching device and a phase shifter. CONSTITUTION:Transmission/reception separating circuits 61-64 consisting respectively of switching devices 121-124 and phase shifters 131-134 and two pairs of circulators 71, 75; 72, 76; 73, 77 and 74, 78 are provided between monopulse synthesizers consisting of feeder circuits 51-54 of a monopulse system electronic controlled antenna to a plurality of active antenna elements 81-8n, 91-9n, 101-10n and 111-11n, and hybrids 2-4, 15, and the three terminals of the output of the monopulse synthesizers are provided with switching devices 141-143 to control the switching devices 141-143 and the phase shifters 131- 134. Thus, an electronic controlled antenna in which the monopulse antenna can be changed easily into a multibeam antenna and interference wave eliminating antenna can be obtained. |
