RF performance of ultra-miniature high frequency relays

The frequency of analogue signals and the data rate of digital signals are continuously increasing, thus many high-frequency applications require RF switching. Compared with solid state RF switches, electromechanical devices offer better RF performance providing better insulation, lower insertion loss and better VSWR. Furthermore the linear characteristics of electromechanical contacts provide optimal signal transfer without any signal distortion and the RF characteristics are non-temperature-dependent. Low-cost, high-performance, ultra-miniature high-frequency relays are capable of handling signals up to several GHz. Excellent isolation, insertion loss and VSWR is provided to the highest frequency level, for applications with both 50 /spl Omega/ and 75 /spl Omega/ impedance. Bridge contacts are mainly applied for excellent RF characteristics, provide at the same time excellent switching capability for RF power signals, as two contact gaps in series are present to switch the signal. Pure RF signals as well as RF signal superimposed with DC signals can be handled.