I finally got my patch antenna to work well. I use with my cheap hong kong camera setup. (http://www.cables-world.com/Product/EN/product_detail.asp?productid=592)
I still don´t know weather the tx rf power is 10mW 50 mW or 200mW... the tx takes about 72mah at 5v.... what could be the outputpower?
The range improved from 135m to about 400 m (450ft to 1300)
later I discovered that the tx antenna seems to 1/3 wave 42mm on 2414 mhz.
What Antenna solutions could i use on this camera? A 1/4 wave ground plane antenna didn´t seem to work better than the original...
how importent is it that the distance between the metal sheets on a patch antenna is exactly 5mm for 2,4 ghz?