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Low-cost Ultra High Isolation SPDT Switch

Low-cost Ultra High Isolation SPDT Switch

Wide-band test instrumentation often needs signal routing. This is accomplished with mechanical switches, which are expensive and slow. When isolation requirements are not high, it is also done with electronic switches. Some high isolation switches available in the market are very expensive. Mini-Circuits has developed a pair of low-cost, high isolation, fast switching, TTL-driven, connectorized – switches that have a typical isolation of 85 dB at 1 GHz and 60 dB at 5 GHz. Two versions, absorptive and reflective have been introduced. This paper will describe these DC-5 GHz high isolation switches and a typical application.

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