Impedance matching circuit diagram of high-frequency circuit test

Published:2011/7/16 9:38:00 Author:Sophia | Keyword: High-frequency circuit test, Impedance matching | From:SeekIC

When High-frequency circuit is tested, its impedance match of cable, testers are very important.Impedance usually is 5OΩ or 75Ω. The diagram is the basic connection type to measure the receiver sensitivity. The impedance of the receiver usually is 50Ω, so the output impedance of standard signal generator(SSG) also should be 5OΩ. We should notice the following points: the connecting impedance of the measuring equipment should be identical; the impedance of electric cable should be identical; connector should have excellent impedance chracteristic within the limits of measuring frequency; the cable should be as short as possible; high-powered tester should be adopted; the output terminal of SSG should connect high-frequency fuse wire.



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