Some various low cost LNA's available on ebay for VHF, UHF and SHF usage.

2GHz Receive LNA 




Specification:
Gain: 32dB
supply voltage: 12V DC (Current 35mA) with shielded enclosure
Input Output Impedance: 50 Ohm
Maximum output power: 10dBm(2V PP\50Ohm load)
Input signal: =-22dBM(>-22 dBM creates distortion)
Bandwidth: 1MHz to 2GHz (gain is different under different frequency, please refer to the curve of S21 indicators)
Noise factor: 2dB (0.5 GHz case measurement)
Other: reduce the supply voltage to vary the gain.
Size: approx. 50 x 70 x 12mm (L*W*H)



3GHz Receive LNA












Specifications:
supply voltage: 12V DC (current 35MA)
Gain: 19.5DB
Input Output Impedance: 50 Ohm
maximum output power: 19.5dBm((6VPP \ 50 ohm load)
input signal: <=0dBM
Bandwidth: 1MHz to 3GHz
noise figure:
F=15.2MHZ    GAIN=17.99DB
F=345.2MHZ   GAIN=19.55DB
F=945.2MHZ   GAIN=18.09DB
F=1.500GHZ   GAIN=16.16DB
F=1.955GHZ   GAIN=15.77DB
F=2.295GHZ   GAIN=14.11DB
F=2.610GHZ   GAIN=13.60DB
F=2.895MHZ   GAIN=12.56DB



4GHZ RF LNA
Specifications:
supply voltage: 5V DC (typical current 85MA)
Gain: 20DB
Input Output Impedance: 50 Ohm
the maximum output power: 10dBm (2VPP \ 50 ohm load)
input signal: <= 0dBm (greater than 0dBm creates distortion)
Bandwidth: 50MHz to 4GHz (gain at different frequencies vary, please refer to the S21 curve indicators)
the noise figure: 1.3dB @ 2GHz