Features SAFETY: The active loop broadband receiver antenna has a built-in safety device that protects against reverse battery connection, over-discharge, over-charging, over-current and short-circuit. EXCELLENT CRAFTING: The active loop antenna shell is CNC machined, adopting high frequency PCB design and high density copper 50-1.5 feeder, using high quality materials to create a high antenna with excellent performance. WIDE OPERATING RANGE: The active receiving antenna's working frequency range is from 50kHz to 500MHz, covering longwave, mediumwave, shortwave, FM broadcasting frequency range and VHF aviation frequency range. HIGH GAIN: Very good gain flatness over the operating bandwidth. It provides a gain of about 17 dB, and even at 450 MHz it still has a gain of about 7 dB. IMPROVED PERFORMANCE: The amplifier board in the small loop antenna utilizes an improved version of the LZ1AQ LNA with a bandwidth from 50kHz to 500MHz and a gain of more than 10dB. It has a very low input impedance (1.2Ω at 1MHz), which reduces noise effectively. Features: SAFETY: The active loop broadband receiver antenna has a built-in safety device that protects against reverse battery connection, over-discharge, over-charging, over-current and short-circuit. EXCELLENT CRAFTING: The active loop antenna shell is CNC machined, adopting high frequency PCB design and high density copper 50-1.5 feeder, using high quality materials to create a high antenna with excellent performance. HIGH GAIN: Very good gain flatness over the operating bandwidth. It provides a gain of about 17 dB, and even at 450 MHz it still has a gain of about 7 dB. HIGH GAIN: Very good gain flatness over the operating bandwidth. It provides a gain of about 17 dB, and even at 450 MHz it still has a gain of about 7 dB. IMPROVED PERFORMANCE: The amplifier board in the small loop antenna utilizes an improved version of the LZ1AQ LNA with a bandwidth from 50kHz to 500MHz and a gain of more than 10dB. It has a very low input impedance (1.2Ω at 1MHz), which reduces noise effectively. Specification: Item Type: Active Loop Antenna Material: Aluminum Alloy, Copper Receiving Frequency Range: 50kHz to 500MHz Gain: 17dB at 10MHz Output Noise: -125dBm(at 10MHz, BW=100Hz) P1dB: +15.5dBm at 10MHz OIP3: +38dBm at 10MHz Power Supply Voltage: 9V to 12V Power 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: Approx. 60cm / 23.6in Package List 1 x Loop Antenna Amplifier 1 x Headphone Jack Adapter 1 x Top Jumper Board 2 x Small Loop Coils (RG402 Coaxial Cable) 1 x 7m Feeder Cable 1 x 1m Feeder Cable 2 x Adhesive Hooks 1 x EVA Storage Bag 1 x Power Supply