Active Magnetic Loop Antenna SDR HF 100kHz–30MHz | FARAJIAJ

FARAJIAJ Active Magnetic Loop Antenna – SDR & HF Radio Reception Made Easy

Unlock crystal-clear shortwave and medium wave reception with the FARAJIAJ Active Magnetic Loop Antenna. Covering an impressive 100 kHz to 30 MHz frequency range, this low-noise, adjustable-gain antenna is the perfect companion for SDR (Software Defined Radio) enthusiasts, amateur radio operators, and shortwave listeners who demand clean, interference-free signals.

Key Features

• Wide Frequency Coverage: 100 kHz – 30 MHz (LF, MF, HF / Shortwave)
• Low Noise Design: Active magnetic loop circuit minimizes interference for crisp, clear reception
• Adjustable Gain: Fine-tune signal amplification to suit your environment and receiver
• Reverse Connection Protection: Built-in circuit board protection prevents chip damage from accidental reverse polarity — giving you peace of mind during setup
• Flexible Power Options: Compatible with a standard 9V battery (via battery buckle) or external power supply via terminal connectors
• DIY Kit Format: Includes main board and all electronic components — ideal for hobbyists who enjoy hands-on building
• Compact & Versatile: Suitable for indoor and outdoor use with SDR dongles, shortwave radios, and HF transceivers

What's in the Box

• ① Main Board (PCB)
• ② Electronic Components (for assembly)

Important Assembly Notes

• Components must NOT be soldered to the back of the circuit board — doing so will damage the chip.
• Power wiring: Red wire = Positive (+) | Black wire = Negative (–). Always double-check polarity before powering on.
• Reverse connection protection is present but is not a substitute for careful assembly — always verify connections first.

Who Is This Antenna For?

Whether you're a seasoned radio amateur, an SDR hobbyist exploring the HF bands, or a shortwave listener chasing distant stations, this active loop antenna delivers a significant improvement over passive antennas in noisy urban environments. Its compact loop design rejects local electrical interference, making it ideal for apartments, home shacks, or portable field use.

Compatible With

• SDR dongles (RTL-SDR, HackRF, AirSpy, etc.)
• Shortwave & medium wave radios
• HF transceivers and receivers
• Ham radio setups

Made in Mainland China.

Learn More About Radio Frequency Standards

For technical standards related to radio equipment, visit the FCC or explore radio spectrum management resources at NIST – Radio Frequency Metrology.

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Frequently Asked Questions

Q: What frequency range does this active magnetic loop antenna cover?

A: This antenna covers 100 kHz to 30 MHz, spanning the LF (low frequency), MF (medium wave), and HF (shortwave) bands — making it highly versatile for SDR listening, AM broadcast reception, and shortwave radio monitoring.

Q: Can I use this antenna with an RTL-SDR dongle or similar SDR receiver?

A: Yes! This active loop antenna is fully compatible with popular SDR dongles such as RTL-SDR, HackRF, and AirSpy, as well as any HF receiver with a standard antenna input. It significantly improves reception quality in the 100 kHz–30 MHz range.

Q: Does this come fully assembled or as a DIY kit?

A: This product ships as a DIY kit that includes the main PCB and all electronic components. You will need to solder the components onto the board yourself. Note: components must only be soldered to the correct side of the board to avoid chip damage.

Q: What power source does this antenna require?

A: The antenna can be powered by a standard 9V battery using the included battery buckle connector, or via an external power supply using the onboard terminal connectors. Always ensure correct polarity (red = positive, black = negative) before powering on.