Amplitude modulator using frequency multiplier |
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| 申请号 | JP15098781 | 申请日 | 1981-09-24 | 公开(公告)号 | JPS5851603A | 公开(公告)日 | 1983-03-26 |
| 申请人 | Nec Corp; | 发明人 | MINAMI SHIYOUGO; | ||||
| 摘要 | PURPOSE:To obtain an amplitude modulator of microwave and milliwave bands with small size and simple construction, by superimposing a modulation signal on a bias voltage applied to a bias circuit of a frequency multiplier and amplitude-modulating an output of the frequency multiplier. CONSTITUTION:A frequency multiplier consists of an input matching circuit 1, a frequency multiplying diode 2, an output BPF3 and a bias circuit 4. The circuit 4 is connected to an anode of the diode 2, and a bias voltage value is set so that an output of the frequency multiplier is maximum. Through the superimposition of a base band signal on the bias voltage, the output of the frequency multiplier is controlled for the amplitude modulation. The output of a transmission local oscillator 13 is frequency-multiplied at the frequency multiplier 14 to be a transmission frequency, and the multiplier 14 is ampliude-modulated with the base band signal inputted from a terminal 12 and transmitted from an antenna 15. | ||||||
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