G0KSC Antennas
Shop

Engineered, not estimated

Where amateur radio meets professional RF engineering.

G0KSC designs are developed and validated in Ansys HFSS — the same electromagnetic simulation suite used by aerospace and defence. The result is real-world performance you can predict before the antenna ever leaves the bench.

  1. Modelled in Ansys HFSS — Full-wave electromagnetic simulation, not approximation.

  2. Direct 50Ω feed — No lossy matching networks or gamma matches required.

  3. Low-noise patterns — Clean front-to-back and suppressed sidelobes for quiet receive.

  4. Built to last — Marine-grade hardware and robust mechanical engineering.

Construction guides

  • Building an LFA — practical steps for a successful first-time Yagi build, and what to check before changing the insulator type or element diameter from the published design.
  • Making the LFA Loop — how Justin forms the LFA's loop driven element, step by step with photos.
  • Creating the OWL Match — the simple coaxial matching transformer for the 12.5 Ω and 28 Ω OWL Yagis.
  • Creating the OWL Folded Dipole — the folded dipole that turns a 12.5 Ω OWL Yagi into a 50 Ω antenna.
  • Creating a Balun — what a balun does, the main types, and how to choose and build one, including the G0KSC hybrid "antenna balun".
  • G0KSC Insulators — why element insulators should be as small as possible, and commercial alternatives to making your own.
  • Mechanical Design Concept — why G0KSC designs avoid tapered elements and how element thickness affects bandwidth.
  • Stacking Quads the Right Way — feeding a stacked pair of 2-element quads with half-wave 75 Ω phasing lines.
  • Antenna Building Part Suppliers — companies that supply parts for antenna building.

Background reading