With network-analyser you can measure only up to 6 GHz. For higher frequencies you have to use generator and power-meter. This article describes how does the author measure such relays available from various manufacturer such as Narda
http://df2ck.de/tech/smarelay
Remote control by whistling. Turn appliances off and on.
http://members.tripod.com/michaelgellis/whistle.html
This circuit demands a control current that is 100 times smaller than that needed by a typical optically isolated solid state relays. It is ideal for battery-powered systems. Using a combination of a high current TRIAC and a very sensitive low current SCR
http://www.discovercircuits.com/PDF-FILES/lowssr2.pdf
http://www.uniyar.ac.ru/~geograph/schemes/effe/ltchrly.gif
It has both a source and sink output that change state whenever a metal button connected to the circuit is touched. An earth ground reference is required.
http://www.imagineeringezine.com/PDF-FILES/5vmom1.pdf
http://www.mitedu.freeserve.co.uk/Circuits/Switching/darksw.htm
uses a single IC to convert a noisy pushbutton switch signal into a clean pulse or a sustained push on-push off signal.
http://www.imagineeringezine.com/PDF-FILES/4013cir.pdf
controls 4 relays from PC parallel port
http://www.geocities.com/micgm/circuit/circuit.html