The Making of a 2 meter Loop Antenna

Creating a loop antenna for the 2 meter band (144-148 MHz) can be a rewarding project for ham radio enthusiasts. Here’s a detailed guide on how to build one.

Copper wire: Approximately 14-16 gauge is ideal.
Insulators: For the corners of the loop.
Coaxial cable: For connecting to your radio.
Antenna tuner: Optional, but can help with matching.
Tools: Wire cutters, soldering iron, and a multimeter.

Determine the Size:
- The circumference of the loop should be about 1/2 wavelength for the 2 meter band. The wavelength can be calculated using the formula: $Wavelength (meters) = Frequency (MHz) 300$
- For 144 MHz, the wavelength is approximately 2.08 meters. Therefore, the loop should be about 1.04 meters in circumference.
Cut the Wire:
- Cut a length of wire to create a loop with a circumference of about 1.04 meters. This means the length of the wire should be around 1.04 meters.
Form the Loop:
- Create a square or circular loop with the wire. If using a square design, each side will be approximately 26 cm long.
Attach Insulators:
- Use insulators at each corner of the loop to maintain the shape and provide a point for mounting.
Feed Point:
- Connect the coaxial cable to the feed point of the loop. You can use a simple balun or connect the center conductor to one side of the loop and the shield to the other side.
Mount the Antenna:
- Elevate the antenna as high as possible for better performance. You can use a mast or a tree to support it.
Testing and Tuning:
- Use a SWR meter to check the standing wave ratio. Adjust the loop size slightly if necessary to achieve a good match.

Orientation: The loop can be oriented horizontally or vertically depending on your preference and the type of communication you want to achieve.
Multiple Loops: You can create multiple loops and connect them in parallel for increased gain.
Weatherproofing: If you plan to use the antenna outdoors, consider weatherproofing the connections and using UV-resistant materials.

Building a loop antenna can enhance your ham radio experience, providing good performance on the 2 meter band. Enjoy your project!