Slim-Jim Antenna for FM Broadcast Band reception (88–108 MHz)

The FM Slim-Jim antenna is a proven and efficient vertical antenna design widely used in the VHF range. Originally derived from the J-Pole, this antenna offers excellent omnidirectional coverage, low angle radiation, and simple construction. The diagram shown here illustrates a Slim-Jim antenna optimized specifically for the FM broadcast band from 88 MHz to 108 MHz, making it suitable for FM transmitters, community radio stations, and high-quality FM reception. This particular design, credited to YY5RM, provides precise dimensional data that allows accurate tuning across the entire FM band.

Slim-Jim Antenna for FM Broadcast Band reception (88–108 MHz)

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 K4ERO) 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.

Unlike a typical 1-wavelength loop, the hourglass uses a 2-wavelength wire. The crossing point in the center acts as a phasing section, forcing currents in the top and bottom horizontal segments to be in phase. This creates a narrow vertical radiation pattern that puts your signal exactly where it needs to be: on the horizon.

Hourglass Loop Antenna : A Stealthy Performer for VHF and UHF

DIY 145 MHz Twin Delta Loop Antenna for Ham Radio Operators

The 145 MHz Twin Delta Loop Antenna is one of the most efficient and easy-to-build antennas for the 2-meter amateur radio band. With its excellent gain, wide radiation pattern, and stable SWR, this antenna has become a top choice among VHF enthusiasts and home-brew antenna builders. In this guide, we will explore the design, dimensions, feeding method, and performance characteristics of a well-optimized Twin Delta Loop antenna for 145 MHz.

DIY 145 MHz Twin Delta Loop Antenna for Ham Radio Operators

Building the Ultimate Multiband OCF Dipole for 40m-6m

Finding a single antenna that handles multiple HF bands without a mountain of complicated traps is a challenge. While many hams reach for a standard dipole, the Off-Center Fed (OCF) design offers a much smarter way to stay active on several bands. This specific design Multiband OCF Dipole,  originally developed and tested by Rick Littlefield (W1BQT), serves as a reliable workhorse for the 40, 20, 10, and 6-meter bands.

By shifting the feed point, we tap into a “magic spot” where the antenna’s impedance stays relatively consistent across harmonically related frequencies. This makes it a perfect match for the standard 50-ohm coax found in most shacks today.

Building the Ultimate Multiband OCF Dipole for 40m-6m