435MHz (70cm) 6 Element Yagi Antenna - August 2023

Design, modelling, construction, and testing of a 70cm Yagi Antenna, including antenna gain range test using a NanoVNA.

The 6 Element Yagi-Uda antenna has a 10MHz bandwidth from 430MHz to 440MHz.

Antenna construction details: https://vk6ysf.com/yagi_435mhz_6el_20...

Yagi dimensions modelled with: https://www.changpuak.ch/electronics/... JavaScript Version 12.01.2014, based on Rothammel / DL6WU

The 70cm band is an ideal frequency range for experimenting with various antenna design types. Tolerances are not overly critical, as is the case with the 23cm band and higher frequencies, nor is it as cumbersome for construction as the 2m band (144 - 148MHz) and lower frequencies.