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EXTRA ANTENNA

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abcd567:
The splitters commonly available for Dish/TV have insertion loss of 4 dB to 8 dB.
This is OK for Dish as the dish has a LNB mounted at dish, and the LNB has a built-in Amplifier.
For ADSB this much attenuation is killing, unless an amplifier is installed. Some hobbyists have successfully used low cost satellite in-line amplifier for L Band (950 MHz to 2050 MHz) for ADS-B 1090 MHz.

3 dB attenuation = power reduced to 1/2 
6 dB attenuation = power reduced to 1/4
9 dB attenuation = power reduced to 1/8

The isolation between two inputs (2 antennas in this case) of these TV/Dish splitters is generally of the order of -25 dB to -40 dB, which is OK.

Boudewijn:
ok abcd567,

Thanks for the additional info. I take it into my considerations. The biggest problem is that if I place a second antenna these should'nt overlap each other's field of view.

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