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urgentcomm » SMT

The return loss bridge

Published Saturday, November 01, 2003

The return loss bridge (RLB), sometimes called SWR bridge, is handy for many applications in two-way radio work. It provides a quick and easy means of sweep-testing antennas, feedlines, tuning stubs, duplexers, cavities and other frequency-sensitive devices. Typically, the RLB is used to test devices that should show a pass response (indicating high return loss) or a reject response (indicating minimum return loss) or both over a single sweep range. The RLB provides a means of measuring the degree of match or mismatch of the DUT at a particular frequency or frequency band. This is done by measuring ...

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