Homebrew 5 elements yagi for 2m at 145Mhz VHF, great performance and lightweight construction make it a suitable long distance point to point contact antenna.
Build the 5 Elements 2m VHF Yagi with the following specifications
Antenna Gain: 9.82dBi or 7.67dBd
Front to back: 14.2dB
Beamwidth: 54° Vertical, 27° Horizontal
SWR: <= 1.5:1 @ Band Edge
Material list for building a 5 Elements 2m VHF Yagi
1. 1″ X 0.5″ Rectangular Aluminum tubing for the boom
2. 3/8″ Aluminum tubing for antenna elements
3. 1cm Outside diameter antenna tubing for elements holder
4. 1pc SO239 connector
5. Pop rivets / Rivet tool
6. #12 AWG Copper wire with insulation (12″for Gamma match)
7. Soldering iron
8. 10pcs Stainless steel nuts and bolts 20mm length 3mm diameter
9. 1pc, Butterfly nut and 1 bolt 18mm length 3mm diameter
10. Aluminum plate 0.5mm thickness
11. Collapsible tube (shrinkable tubes)
Note: the measurement for the mounting hole is entirely up to you depending on the size of U bolt that you’re using.
If you are still confuse on how to start from building this Yagi, you may look into the tutorial on Building the 3 Elements Yagi video tutorial here: https://dw1zws.com/3-elements-yagi-lightweight-end-mount-antenna-by-panda-build/
Antenna Matching: This is a gamma match antenna you can use the same gamma match I used for building the 4 Elements Gamma Match Yagi you may open the link here: https://dw1zws.com/building-the-gamma-match-for-4-elements-yagi/
To obtain the antenna pattern and approximate gain I used 4NEC2
For the SWR results and measurement of this 5 Element 2m VHF Yagi you may see it here on the link below:
https://dw1zws.com/5-elements-yagi-swr-response/