February 25, 2026

A log-periodic dipole array (LPDA) uses progressively shorter dipoles and a common feed line to cover a broad frequency range. As frequency rises, the strongest radiating currents move toward the shorter elements. The antenna can therefore work across several bands without changing its physical length. Its usable bandwidth still depends on the finished design and […]

Design a log-periodic dipole array by defining the required band and radiation performance, calculating an initial scaled geometry, then optimizing and measuring the complete antenna. Element lengths alone cannot guarantee gain, impedance match or power handling. The feed, supports, termination and mounting structure belong in the design model. 1. Set measurable requirements Specify the lowest