| 摘要 |
PURPOSE:To prevent the effect of output spurious radiation of a local oscillator by separating an up-converter section and a down-converter section by means of a metallic wall. CONSTITUTION:A frequency up-conversion section comprising an input terminal section 11, input band pass filter 12, the 1st mixer 13, the 1st local oscillator 14 and a prescaler 15 is contained in the up-converter section in side wall sections 30, 30a of a metallic case. The circuit section applying low frequency conversion to a signal converted into a high frequency by the frequency up- operation is contained so that the section converting the frequency into a high frequency and the section converting the frequency lower are separated through the constitution above.
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