The Hermitage
Practical DIY Guide

Build a DIY Loop UHF TV Antenna

The loop antenna is the simpler, smaller cousin in the DIY TV antenna family. It uses less material, takes up less space, and can work surprisingly well when your local signals happen to line up with what it likes. That last part matters, because loop antennas can be excellent or fussy depending on location, and antennas remain deeply committed to reminding people that physics is not optional.

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What this design is good at

Compact UHF reception where you want a simple build, a quick experiment, or a smaller attic or indoor antenna before committing to a larger bowtie array.

Overview

A loop antenna uses a continuous conductive path shaped into a square, rectangle, or circle, with a feed gap where the balun connects. For UHF TV work, a compact square or rectangular loop is easy to build from solid wire and simple to mount on scrap wood or PVC.

This design is not as broad-band or forgiving as a 4-bay bowtie, but it is easier to build and easier to experiment with. If you already found that a loop works well at your house, this guide helps you build one cleanly instead of just bending copper until the television stops complaining.

Best fit: moderate-distance UHF reception, small spaces, quick testing, or a simple first build when you do not want to build a full directional array right away.

Parts list and rough April 2026 pricing

Part Typical quantity Rough cost Notes
12 AWG solid copper wire 6 to 10 ft $2 to $5 12 AWG bare copper was about 28¢ per foot, with a minimum purchase length. Scrap wire works too.
75Ω to 300Ω balun 1 $5 Connects the antenna feed point to standard coax.
RG6 coax cable As needed $8 to $10 for 25 ft Longer runs cost more. Use decent cable, not bargain-bin nonsense.
Wood strip or PVC frame 1 $3 to $8 Optional, but it makes the build sturdier and less chaotic.
Screws, washers, or zip ties Small pack $3 to $6 Use whatever matches the frame you are building.
Hardware cloth reflector 1 small sheet $11 to $17 Optional but recommended. A 2 ft x 5 ft roll was roughly in this range.

Typical total build cost: about $20 to $45 if you already have some scrap material, or roughly $35 to $55 if you are buying everything fresh.

Recommended dimensions

  • Loop shape: square or slightly rectangular.
  • Total loop perimeter: roughly 34 to 40 inches.
  • Common starting point: about 9 inches per side for a square loop.
  • Feed gap at the bottom: about 1 to 1.5 inches.
  • Reflector spacing, if used: about 2 to 4 inches behind the loop.

You do not need millimeter-perfect dimensions. This is a TV antenna, not a moon mission. Still, stay reasonably consistent and do not build something wildly larger or smaller unless you are intentionally experimenting.

Front-view diagram

          TOP

      +-------------------+
      |                   |
      |                   |
      |                   |
      |                   |
      |                   |
      +--------   --------+
               \ /
                X   <-- balun connects across the feed gap
               / \

          BOTTOM

Side-view diagram with reflector

   Signal source --->

   [ loop element ]      2 to 4 in gap      [ reflector mesh ]
        | |--------------------------------------|#|#|#|#|
        | |
        | |

   Mount both to a wood or PVC support frame.

Step 1: Build the support frame

  1. Cut a wood strip, scrap board, or PVC frame large enough to support the loop.
  2. Mark the center area where the loop will sit.
  3. If you plan to add a reflector, make sure the frame gives you a way to hold the reflector 2 to 4 inches behind the loop.

A frame is optional, but strongly recommended. Loose wire hanging in midair technically counts as an antenna, in the same way a mattress on the floor technically counts as bedroom furniture.

Step 2: Form the loop

  1. Cut a single piece of solid copper wire about 36 inches long as a starting point.
  2. Bend it into a square loop with roughly equal sides.
  3. Leave a gap of about 1 to 1.5 inches at the bottom center instead of closing the loop completely.
  4. Adjust the shape until it looks even and flat.

Square is easiest. A rectangle can also work. A circle is fine if you are good at making circles, which most humans dramatically overestimate.

Step 3: Mount the loop

  1. Attach the loop to the frame using insulated clips, screws with spacers, or zip ties.
  2. Keep the feed gap at the bottom.
  3. Make sure the two feed ends do not touch.
  4. Keep the loop as flat as possible.

Step 4: Connect the balun

  1. Attach one balun lead to one side of the feed gap.
  2. Attach the other balun lead to the opposite side.
  3. Tighten connections so they stay put and make good electrical contact.
  4. Connect your coax cable to the balun.

This is the actual feed point. If these connections are sloppy, you are not testing the antenna anymore. You are testing whether bad contact can impersonate bad reception.

Step 5: Add a reflector if you want better performance

  1. Mount hardware cloth, wire mesh, or another conductive screen behind the loop.
  2. Keep it about 2 to 4 inches behind the loop.
  3. Make the reflector at least a little larger than the loop itself.

The reflector helps push reception forward, reduce pickup from the rear, and make the antenna more directional. It is one of the easiest upgrades you can add without turning the project into a science fair argument.

Step 6: Mount and aim the antenna

  1. Place the antenna as high as practical.
  2. Aim the flat face of the loop toward the broadcast towers.
  3. If indoors, try a window-facing side of the house first.
  4. If outdoors, protect connections from water and support the coax so it does not tug on the balun.

Loop antennas can work indoors, but rural reception improves quickly with better placement. Height still matters. Clear line of sight still matters. Trees and hills still do not care about your optimism.

Step 7: Scan channels and fine-tune

  1. Run a fresh channel scan on the TV or tuner.
  2. Rotate the antenna a little at a time and rescan if results are weak.
  3. Try small changes in height and location before changing the antenna dimensions.
  4. If you only care about a few channels, optimize for those first.
Practical truth: a loop antenna can outperform a more complicated antenna when it happens to line up well with your local frequencies and signal path. It can also lose badly once conditions change. That is not mystery. That is just bandwidth and directionality showing up to do their jobs.

When this design makes sense

  • You want a quick, compact UHF antenna build.
  • You have limited attic or indoor space.
  • You want to experiment before building a bigger bowtie array.
  • You already had good luck with a simple loop and want a cleaner version.

When to skip it

  • You need the broadest possible UHF coverage from one antenna.
  • You are very far from the towers and need maximum gain.
  • You want the most forgiving design for rural multi-channel reception.

Final notes

The loop antenna is simple, compact, and worth building, especially if your location already seems to favor loop-style reception. It is not the universal answer to every reception problem, but it is cheap to build, easy to test, and a good tool to keep in the antenna pile.

If the bowtie guide is the stronger all-around rural workhorse, this loop guide is the lighter, quicker build for people who want less material, less bulk, and a fair shot at surprisingly good results.

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