DIY Antennas, QRP, SDR & Ham Radio Projects from VU3DXR
A collection of do-it-yourself antenna projects for the VHF bands , including J-poles, loops, dipoles, collinears, and dual-band designs. These guides provide dimensions, materials, and construction steps for building efficient amateur-radio antennas at low cost.
Unlock dual-band performance with the Open Stub J-Pole. This comprehensive guide details how to construct a 2m/70cm antenna using a single feedline. By following precise dimensions for the 146 cm, 48.9 cm, and 15.9 cm rods, hams can build a durable, high-gain vertical dipole perfect for home or field use.
Build a high gain bi-square antenna for higher HF bands. Get 4dB gain over dipole on 10 meters with detailed calculations, matching solutions, operation tips
Build a simple twin-lead J-pole antenna for VHF/UHF using 300-ohm ribbon cable. This end-fed half-wave vertical with quarter-wave matching stub delivers omnidirectional coverage, low noise, and reliable FM/repeater performance without ground radials
Build a 5/4-wave VHF antenna for 145 MHz using 450 Ω ladder line and a choke feed. Shows how to mount, feed, and match this high-gain vertical for FM, repeater, and simplex operations on the 2 m band
Compact dual-band RW4HFN antenna covering 145 MHz (2 m) and 430 MHz (70 cm) with a center-fed element and integrated matching section. Single-feed 50 Ω coax design provides versatile VHF/UHF operation for base, portable, and repeater use.
Build the ZED dipole antenna for 2 m and 70 cm bands — a compact bent-element half-wave dipole with near-50 Ω feed, broadband VHF/UHF coverage, and simple DIY construction
Quarter-wave COCO antenna design for 2 m band: stacked λ/4 coax elements with phase-reversing joins for compact high-gain VHF performance and easy DIY construction
Build your own Delta Loop VHF antenna for 145 MHz with our clear diagram, dimensions, instructions, explains construction, feed point, and tuning tips.