[TowerTalk] Help need Vacuum Relay Isolation 1.8 to 30

[OM7ZZ, Jozef Urban]

We're builded 10 ANT / 2 Radio switch with Gigavac G2SP relays. On each ANT port are three of them used.
Achieved -60dB isolations on adjacent ANT ports and more than -70dB on non adjacent ports.
When both radios would like to select the same antenna, isolation is still around -68dB. 
All mentioned isolations was measured at 28MHz.

Some fotos and measurements are here:
www.microham.com/Custom/DT/doubleten1.jpg
www.microham.com/Custom/DT/doubleten2.jpg
Insertion loss
www.microham.com/Custom/DT/insertion.jpg
SWR
www.microham.com/Custom/DT/swr.jpg
Isolations same ANT port
www.microham.com/Custom/DT/isolation1.jpg
Isolations adjacent ANT ports
www.microham.com/Custom/DT/isolation2.jpg
Isolations non-adjacent ANT ports
www.microham.com/Custom/DT/isolation3.jpg

73 Jozef OM7ZZ

-=x=-
Skontrolované antivírovým programom NOD32