The Making of a 2 meter Loop Antenna

Building a Loop Antenna for the 2 Meter Band

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.

Materials Needed

Steps to Build the Loop Antenna

  1. 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:
    • For 144 MHz, the wavelength is approximately 2.08 meters. Therefore, the loop should be about 1.04 meters in circumference.
  2. 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.
  3. 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.
  4. Attach Insulators:

    • Use insulators at each corner of the loop to maintain the shape and provide a point for mounting.
  5. 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.
  6. Mount the Antenna:

    • Elevate the antenna as high as possible for better performance. You can use a mast or a tree to support it.
  7. 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.

Additional Tips

  • 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!

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