DIY 3-Element 433 MHz Yagi Antenna for Amateur Radio

Directional antennas can dramatically improve signal quality in the 433 MHz band. Whether you work with amateur radio, telemetry, LoRa projects, remote sensors, or experimental RF systems, a compact Yagi antenna is often one of the simplest upgrades you can make.

This particular 3-element 433 MHz Yagi Antenna design stands out because it combines good forward gain with straightforward construction. It uses a reflector, a loop-driven element, and a director mounted on a compact boom. The result is a lightweight antenna capable of significantly improving range and reducing unwanted interference.

The design shown above is based on proven dimensions used by radio amateurs and antenna experimenters. Its geometry is optimized specifically for the 70 cm UHF band near 433 MHz.

DIY 3-Element 433 MHz Yagi Antenna for Amateur Radio

The Mini G5RV Antenna : Big Performance in a Small Backyard

Space is the ultimate enemy for many ham radio enthusiasts. If you don’t have the room for a massive 100-foot wire, you don’t have to stay off the air. The Mini G5RV is a clever, scaled-down version of Louis Varney’s classic design that fits into much tighter spots while still covering multiple bands.

The Mini G5RV Antenna : Big Performance in a Small Backyard

Building the Shorty 4020 Antenna for 40M and 20M Operation

Space has always been one of the biggest challenges in amateur radio. Full-size HF dipoles work well, but not everyone has enough room for long wire antennas stretched across a backyard. That’s exactly where the Shorty 4020 antenna becomes interesting.

The Shorty 4020 is a compact dual-band dipole designed for 40 meters and 20 meters. Its biggest advantage is simple: it reduces the physical size normally required for a 40m dipole while still providing respectable HF performance.

For apartment operators, portable activators, and anyone dealing with restricted installation space, this antenna has gained a solid reputation over the years.

Building the Shorty 4020 Antenna for 40M and 20M Operation

DIY 145 MHz Twin Delta Loop Antenna for Ham Radio Operators

The 145 MHz Twin Delta Loop Antenna is one of the most efficient and easy-to-build antennas for the 2-meter amateur radio band. With its excellent gain, wide radiation pattern, and stable SWR, this antenna has become a top choice among VHF enthusiasts and home-brew antenna builders. In this guide, we will explore the design, dimensions, feeding method, and performance characteristics of a well-optimized Twin Delta Loop antenna for 145 MHz.

DIY 145 MHz Twin Delta Loop Antenna for Ham Radio Operators