50kHz-500MHz Active Magnetic Loop Antenna Amplifier for SDR Receiver

50kHz-500MHz Active Magnetic Loop Antenna Amplifier for SDR Receivers

This wideband active magnetic loop antenna kit is designed for receive-only radio and SDR applications from 50kHz to 500MHz. It combines a compact loop assembly, active amplifier, switchable configuration board, feeder cables, mounting hooks, and a storage case for bench, indoor, or portable receiving setups.

Key Features

• Wide receive range: 50kHz-500MHz for compatible HF, AM, FM, VHF, UHF, and SDR receiving equipment.
• Active front end: Listed gain of 17dB at 10MHz for improving received signal level.
• Configurable loop: The amplifier and jumper boards provide switch-selectable loop configurations for different receiving environments.
• Compact installation: Supplied loop sections, feeder cables, adhesive hooks, and carrying case support fixed or portable setups.
• Receive-only design: Intended for signal reception and spectrum monitoring, not RF transmission.

Technical Specifications

• Receiving frequency range: 50kHz-500MHz
• Gain: 17dB at 10MHz
• Output noise: -125dBm at 10MHz, BW=100Hz
• P1dB: +15.5dBm at 10MHz
• OIP3: +38dBm at 10MHz
• Supply voltage: 9-12V DC
• Supply current: 130-150mA
• Antenna interface: SMA male
• Receiver output: SMA female
• Loop coaxial cable: RG402
• Listed RG402 loss: 0.145dB/m
• Listed loop conductor length: 60cm
• Listed module size: 60 x 45 x 18mm

Loop Configuration

The switchable boards allow the loop assembly to be configured for different receiving conditions. The available arrangements include active loop configurations intended to reduce electric-field interference and improve magnetic-field reception. Set the switches only with the power disconnected, and verify the desired arrangement before reconnecting the receiver.

Package Contents

• 1 x active loop antenna amplifier module
• 1 x switchable jumper/configuration board
• 2 x RG402 loop sections
• 1 x 7m feeder cable
• 1 x 1m feeder cable
• 1 x 3.5mm-to-SMA adapter cable
• 2 x adhesive mounting hooks
• 1 x EVA storage case

Setup and Selection Notes

• A power supply is not listed in the package contents. Use a stable, low-noise 9-12V DC supply that can provide at least 150mA.
• Confirm connector type, polarity, receiver compatibility, and switch settings before applying power.
• Position the loop away from switching power supplies, displays, computers, and other local noise sources.
• Rotate or reposition the loop to improve the desired signal and reduce local interference.
• Do not connect this receive-only antenna system to a transmitter.