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

100kHz–30MHz Active Magnetic Loop Antenna – Low Noise, Adjustable Gain for SDR & HF Radio

Take your shortwave, medium wave, and HF radio listening to the next level with this Active Magnetic Loop Antenna covering an impressive 100kHz to 30MHz frequency range. Engineered for Software Defined Radio (SDR) enthusiasts and shortwave hobbyists alike, this antenna delivers low-noise reception with adjustable gain, making it ideal for pulling in weak or distant signals across the full HF spectrum.

This product ships as a DIY kit — including a main circuit board and all required electronic components — so you can enjoy the satisfaction of building and tuning your own antenna system. The board features built-in reverse polarity protection, so an accidental power connection mishap won't damage the main chip. Please note: components must only be soldered to the designated side of the board to avoid damage.

Made in Mainland China.

Key Features

• Wide Frequency Coverage: 100kHz to 30MHz — covering LW, MW, and all HF shortwave bands
• Active Design with Adjustable Gain: Amplify incoming signals and fine-tune sensitivity for your listening environment
• Low Noise Circuit: Optimized PCB design minimizes interference for cleaner, clearer signal reception
• Reverse Connection Protection: Built-in safeguard prevents chip burnout from accidental reverse polarity
• Flexible Power Input: Supports 9V battery (via battery snap) or external power supply (via terminal block)
• SDR Compatible: Works seamlessly with popular SDR receivers and traditional shortwave radios
• DIY Kit Format: Includes main board and all electronic components — a rewarding build for hobbyists

Specifications

• Frequency Range: 100kHz – 30MHz
• Antenna Type: Active Magnetic Loop
• Gain: Adjustable
• Power Supply: 9V battery (snap connector) or external DC (terminal block)
• Polarity Protection: Yes (reverse connection protected)
• Origin: Mainland China

What's in the Box

• ① Main Circuit Board
• ② Electronic Components (for DIY assembly)

Important Notes

⚠️ Wiring Caution: The rear red wire port is positive (+) and the black wire port is negative (−). Always verify correct polarity before powering on. Components must be soldered to the correct (front) side of the board — soldering to the back will damage the chip.

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Frequently Asked Questions

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

A: This active magnetic loop antenna covers 100kHz to 30MHz, spanning long wave (LW), medium wave (MW), and the full shortwave/HF spectrum — making it versatile for SDR receivers, AM radio, and HF listening.

Q: Is this antenna compatible with SDR (Software Defined Radio) receivers?

A: Yes! This antenna is specifically designed for use with popular SDR receivers as well as traditional shortwave and medium wave radios. Its adjustable gain and low-noise circuit make it an excellent front-end antenna for SDR setups.

Q: What power supply does this antenna require?

A: The antenna supports a 9V battery using the included battery snap connector. Alternatively, you can connect an external DC power supply via the terminal block on the board. Always double-check polarity (red = positive, black = negative) before powering on.

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

A: This product is supplied as a DIY kit, including the main circuit board and all necessary electronic components. You will need to solder the components onto the board. It is suitable for hobbyists with basic electronics soldering experience.