Hi All,
For thoose who have long cable run between antenna and receiver, a new PCB active antenna design may be a good and cheap solution.
This antenna base on the standard passive PCB antenna include on the same antenna PCB a LNA with a noise figure close to 1 db and haing a gain of 22 dB.
It also incluse a SAW 30 MHz BW filter to reject (-35db) all GSM frequencies in the 900 MHz band.
With such antenna, it is possible to use up to 35m of standard and cheap RG-58 coaxial cable without significant signal losses.
More, the antenna is poswered through the coax cable with a Bias-Tee on a 5v USB port.
Test shows coverage of 250 nM with a portable setup (tablet PC) and SDR dongle
More info on this antenna here: http://f5ann.pagesperso-orange.fr/PC...nna/index.html
Antenna is available here: http://h2204566.stratoserver.net/Sma...a-for-1090-mhz
or here : http://www.shop-modesbeast.com/epage.../Products/1401
F5ANN
For thoose who have long cable run between antenna and receiver, a new PCB active antenna design may be a good and cheap solution.
This antenna base on the standard passive PCB antenna include on the same antenna PCB a LNA with a noise figure close to 1 db and haing a gain of 22 dB.
It also incluse a SAW 30 MHz BW filter to reject (-35db) all GSM frequencies in the 900 MHz band.
With such antenna, it is possible to use up to 35m of standard and cheap RG-58 coaxial cable without significant signal losses.
More, the antenna is poswered through the coax cable with a Bias-Tee on a 5v USB port.
Test shows coverage of 250 nM with a portable setup (tablet PC) and SDR dongle
More info on this antenna here: http://f5ann.pagesperso-orange.fr/PC...nna/index.html
Antenna is available here: http://h2204566.stratoserver.net/Sma...a-for-1090-mhz
or here : http://www.shop-modesbeast.com/epage.../Products/1401
F5ANN