Description: The small loop antenna (hfdloop) is a small size full band ring magnetic field active receiving antenna To 500MHz, mainly composed of top jumper board and small ring amplifier board. Feeder and 12V linear power supply, in which the top jumper board Switch, different functions can be realized by adjusting the position of the switch. The loop can achieve twice the voltage gain of small loop The electric field shielding ring can effectively reduce the interference caused by the electric field in the surrounding environment, such as- The structure of unshielded ring is simple, and the whole small ring can be replaced by a thicker conductor Receiving frequency range: 50kHz to 500MHz Gain: 17dB@10MHz Output noise: -125dBm (@10MHz, =100Hz) P1dB: +15.5dBm@10MHz OIP3: +38dBm@10MHz Supply voltage: 9V to 12V Supply current: 130mA to 150mA Antenna interface: SMA(M) Output interface: SMA(F) Small ring coaxial cable model: RG402 Small ring coaxial cable loss: 0.145dB/m Small loop antenna diameter: 60cm Material: plastic + metal Color as shown Package Contents: 1 x small loop antenna amplifier board 1 x headphone jack adapter cable 1 x top jumper board 2 x small toroids (RG402 coaxial cable) 1 x 7 meter feeder 1 x 1 meter feeder 2 x sticky hooks 1 x EVA storage bag Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.