Learn to build a 145 MHz/433 MHz collinear antenna with 0.64λ radiators, 0.25λ phasing stub, and direct 50 Ω feed for compact high-gain VHF/UHF stations
Antenna
The Antenna category collects all of our HF, VHF, and UHF antenna designs in one place — from compact balcony loops to multiband wire antennas and portable verticals. You’ll find step‑by‑step builds for 80 m to 70 cm, including delta loops, trapped dipoles, doublets, magnetic loops, collinears, J‑poles, Moxons, and more, each with practical dimensions and matching options that actually work on the air.
Many designs are optimised for small plots, apartments, and portable operation, with notes on noise behaviour, radiation patterns, SWR results, and tuning tricks. Whether you are chasing DX on 40 m, experimenting on 6 m “magic band,” or improving repeater coverage on 2 m and 70 cm, this section helps you choose and build the right antenna for your station
Popovic Dual Band Antenna for 2m and 70cm Bands
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
Building End Fed Half Wave antenna (EFHW) for 40M – 10M
DIY EFHW antenna for 40 m–10 m: a 10.1 m multiband end-fed wire with 34 µH loading coil and 49:1 UNUN matching for portable HF and limited-space stations
Shrinking the Dipole: Building the Shorty Forty Antenna for 40M Band
Build the Shorty Forty — a compact 7 MHz dipole using center-loaded coils to shrink a 40 m antenna to 25 ft while maintaining resonance and solid HF performance in limited space
Build Your Own Indoor Antenna for 7 MHz HF Band
Build a compact indoor 7 MHz (40 m) HF antenna using coil-loaded wire sections and 75 Ω feed — a stealth, space-saving solution for apartment and indoor ham radio operation
40m Vertical Antenna: Compact Base-Loaded Design for Powerful HF Operation
Build a compact 40 m vertical antenna using a 3.4 m radiator and 15 µH base-loading coil — a shortened quarter-wave HF vertical delivering strong 7 MHz DX from limited space.
Compact 40M HF Antennas: Short Dipoles & Short Verticals
Explore compact 40 m HF antennas including shortened dipoles and base-loaded verticals for space-limited ham radio setups. Practical designs enable effective 7 MHz operation in small yards, portable, or restricted installations
GM4JMU Shortened Dipole Antenna: Compact Performance for HF Bands
The GM4JMU shortened dipole uses loading coils to deliver full 40 m band performance in under 10 m span. Ideal compact HF antenna for small gardens, rooftops, and portable ham radio installations.
145 MHZ Delta Loop VHF Antenna
Build your own Delta Loop VHF antenna for 145 MHz with our clear diagram, dimensions, instructions, explains construction, feed point, and tuning tips.
Aperiodic Multiband Wire Antenna: A Simple and Effective Design
Aperiodic multiband wire antenna design by HB9KX/DK7ZB: 10.5 m asymmetrical dipole with resistive loading for broadband HF coverage without complex tuning