Antenna Plans

4 Elements Yagi UHF 70cm antenna at 409Mhz

70cm 4 Elements Yagi @ 409Mhz usable frequency 406-412Mhz

Antenna specifications
Antenna Bandwidth: 406-412Mhz
Antenna gain @ center frequency: 7.16dBi
Beam width: 66° Horizontal / 108° Vertical
Front/Back ratio: 14.4dB

4 Elements Yagi 70cm UHF Antenna Materials List

Antenna Measurements

4 Elements Yagi 70cm 409Mhz dimensions

Download the PDF document here

Build the gamma match for this yagi here. Although the gamma match is originally for 3 elements yagi antenna UHF this will also work with this 4 elements UHF yagi antenna.

Expected antenna pattern generated using 4NEC2

Antenna combined pattern

Horizontal pattern

4 Elements Yagi 70cm 409Mhz horizontal pattern

Vertical Pattern

4 Elements Yagi 70cm 409Mhz vertical pattern

Antenna Pattern on the low band 406Mhz

No skewing detected on the antenna pattern as generated by 4NEC2

4 Elements Yagi pattern @ 406Mhz

Antenna Pattern on the high band 412Mhz

Minimal skewing on the 412Mhz antenna pattern as generated by 4NEC2

4 Elements Yagi pattern @ 412Mhz minimal skewing on the pattern generated by 4NEC2

Complete Antenna Analysis using NanoVNA and N1201SA antenna analyzer

Ephraim Gariguez

Recent Posts

Logitech RF mouse suddenly stop scrolling on Ubuntu 22.04LTS

I have an M238 RF mouse that works perfectly fine on Windows and suddenly stop…

7 days ago

Zastone Radios Software

The following are software for radios by Zastone Technology this is publicly and freely available…

3 months ago

PHP 8.2 FPM Tuning

This is a personal note for myself to remember the process I used to tune…

3 months ago

Kicad 6.0 Fix or Workaround for OpenGL required version 1.5

Kicad 6.0 is an schematic entry and pcb layout editor software that is popularly used…

2 years ago

2 Elements Yagi VHF antenna for 144Mhz

If you liked the 3 elements yagi, this antenna build is very close to the…

2 years ago

2 Elements Yagi UHF antenna for 410Mhz

This 2 elements yagi antenna is intended for the 70cm UHF band center frequency is…

2 years ago