Features: The small rings antenna is a small size full frequency bands round circle magnetic field active receiving antenna, with a receiving frequency ranges of 50kHz to 500MHz. It mainly consists of a top jumper board, a small loop amplifier board, a small loop coil, a feeder, a feeder line, and a 12V linear power supply.<br> There are several sets of switches on the top jumper board and small loop amplifier board, and different structures of small loop antenna can be achieved by adjusting the position of the switches. Among them, the Mobius loop can achieve twice the gains of a regular small loop.<br> The electric field shielding rings can effectively reduce the caused by the electric field in the surrounding environment, such as and lighting, electrostatic discharge, etc.<br> The structure of the unshielded rings is simple, and the small loop can be replaced by a thicker wire as a whole. The size modification is simple and easy to install. Small loop antenna is suitable for almost all radios, SDRs, radio stations, and receivers with it will not disappoint you. Come and experiences.<br> Specifications:<br> Receiving frequency ranges: 50kHz to 500MHz<br> Gains: 17dB@10MHz<br> Output noise: -125dBm 10MHz, BW=100Hz)<br> P1dB: + 15.5dBm@10MHz<br> OIP3: + 38dBm@10MHz<br> Power supply<br> Power supply current: 130mA to 150mA<br> Antenna<br> Output<br> Small loop coaxial cable model: RG402<br> Small loop coaxial cable loss: 0.145dB/m<br> Small loop antenna diameter: 60cm<br> Due to different batches, the appearance, color, and printed words of the product may be different, which does not affect the use.<br> Material: PCB+Metal<br> colour: As Shown<br> Package Contents:<br> 1 x Small Loop Antenna Amplifier Board<br> 1 x Headphone Hole Adapter Cable<br> 1 x Top Jumper Board<br> 2 x Small Round Circle Coil (Rg402 Coaxial Cable)<br> 1 x 7m Feeder Cable<br> 1 x 1m Feeder Cable<br> 2 x Adhesive Hook<br> 1 x EVA Storage Bag