DIY Antennas, QRP, SDR & Ham Radio Projects from VU3DXR
A collection of DIY amateur-radio antenna build projects across HF, VHF, and UHF bands, including loops, dipoles, verticals, G5RV, EFHW, sleeve, and multiband compact antennas, with practical construction guides for portable and base-station setups. Homebrew Antennas
If you are running a multiband doublet or any antenna with a tuner, ladder line will outperform coax on almost every band. Here is how to build your own from scratch — four proven designs, common materials, and every practical detail from spacer drilling to routing it through the shack wall.
Learn how a fan dipole (parallel dipole) antenna lets you operate on two HF bands from a single feedline with no tuner. Includes the 468 formula, component breakdown, band pairing tips, and step-by-step building guide
Stacked 5/8-wave VHF Antenna for 2-meter band (146 MHz). Learn design theory, dimensions, tuning method, and original YY5RM reference for high gain ham radio
Full-size Delta Loops for the 40-meter band normally require around 42 meters of wire—often impossible for operators with limited space. To overcome this challenge, Andy (2E1TAP) documented his attempt at constructing a space-efficient, shortened 40-meter Delta Loop.
The dual-band 144/430 MHz Square Loop Antenna is one of the most efficient and compact VHF/UHF antennas that amateur radio operators can build at home. Designed to cover both the 2-meter and 70-centimeter bands, this antenna offers excellent gain, low noise reception, and impressive SWR when constructed correctly.
Build the Popovic dual band antenna for 2m and 70cm bands — a simple, efficient DIY VHF/UHF antenna with excellent SWR, omnidirectional pattern, and easy home construction