DIY Antennas, QRP, SDR & Ham Radio Projects from VU3DXR
“Explore DIY antenna projects that utilize coaxial cable as a primary radiating element. This section features technical guides for building the Coaxial Dipole, the ‘Double Bazooka,’ and various sleeve antennas. Learn about the ‘velocity factor’ of different cables, how to create coaxial traps, and methods for reducing common-mode current to improve station performance and reduce local interference..coaxial antenna
The double bazooka antenna, often described as a coaxial dipole, is a time-tested antenna design widely used by amateur radio operators. Its popularity comes from a combination of simple construction, predictable impedance behavior, and noticeably lower received noise compared to thin wire dipoles.
Build a broadband FM Bazooka (sleeve dipole) antenna for 88–108 MHz with low noise, stable impedance, and excellent wideband FM reception. Ideal for DX listening and clear stereo broadcast signals.
The Bazooka coaxial dipole is a broadband antenna using coax cable as both radiator and quarter-wave sleeve balun, naturally matching 50 Ω feedlines. This guide explains its design, operation, dimensions, and VHF/UHF scaling for efficient omnidirectional performance
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