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
VHF/UHF
The VHF/UHF section concentrates on 6 m, 2 m, 70 cm, and nearby bands, covering everything from FM repeaters and local chat to satellite, ISS, and experimenter‑friendly projects. You’ll find DIY antennas like full‑wave loops, bi‑square designs, Super J‑poles, collinears, hotel antennas, and compact mobile whips, as well as small transmitters, preamps, and SDR‑based handhelds suited for these frequencies.
Articles emphasise gain, pattern control, and practical mounting options so that your handheld, mobile, or base rig can make the most of limited height and cluttered surroundings. Many builds are optimised for simple materials such as copper wire, aluminium tubing, and PVC, making them easy weekend projects. Start here if you want stronger repeater coverage, better simplex range, or a more capable VHF/UHF station for both local and experimental work
Full Wave Loop Antenna for VHF UHF FM Radio Bands
Learn how to build a high-performance Full-Wave Loop Antenna for VHF and UHF FM radio bands. This DIY guide covers dimensions, polarization, and impedance matching for clear local communication and FM broadcast reception.
Build a Powerful FM Radio Bug Transmitter
Three-stage FM bug transmitter using BC547 audio preamp, RF oscillator/modulator, and 2N3563 power amplifier for strong 100 MHz transmission. High-performance DIY wireless microphone circuit with improved range and signal stability.
LinHT SDR: Open-Source Linux-Based Handheld Software Defined Radio for Amateur Enthusiasts
Software Defined Radio technology has revolutionized base station infrastructure, laboratory-grade receivers, and bench equipment for years, yet handheld transceivers have stubbornly clung to traditional fixed-function architectures. The LinHT SDR shatters this paradigm entirely, delivering a genuine software-defined transceiver in a genuinely portable package.
Hotel Antenna for 2 Meter and 70 Centimeter Amateur Bands
The Hotel Antenna is a clever space-saving vertical antenna design popular among VHF and UHF amateur radio operators. It is especially useful for radio amateurs living in apartments, hostels, or temporary locations where installing large outdoor antennas is not practical.
Building a Double Bazooka Antenna for HF and VHF Ham Bands
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.
Hourglass Loop Antenna : A Stealthy Performer for VHF and UHF
If you’re hunting for a high-performance antenna that doesn’t look like a metallic porcupine, the Hourglass Loop (popularized by KE4ERO) is a fantastic weekend project. It is essentially two delta loops stacked and fed in-phase, resulting in a bidirectional pattern with about 5 dB of gain over a standard dipole.
J-Pole Antenna Using 300 Ω TV Ribbon Line
DIY 300 Ω twin-lead J-pole antenna for the 2 m band offering efficient VHF performance, easy coax feed, and portable installation without radials
Twin-Lead J-Pole Antenna for VHF and UHF Amateur Radio
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
3 x 5/8 Collinear antenna for 435 MHz UHF Band
High-gain 435 MHz UHF collinear antenna using three 5/8-wave vertical sections with inductive phasing. Provides ~6 dB omnidirectional gain and low-angle radiation for repeater, base, and long-range 70 cm band operation.