Antenna Plans

Building 5 Elements UHF Yagi (Panda Antenna Build)

5 Elements Yagi UHF (Panda Antenna Build)

Material list for building a 5 Elements UHF 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)

Download Yagi Dimensions Here

To build the 5 Elements UHF Yagi you may follow the direction for building the 3 Elements Yagi. The elements for UHF antenna are shorter and it needs more precise cutting. Follow the measurements on the diagram including spacing between the elements and when built successfully it will give you a very desirable 11 dBi gain or about or about 8.85dBd.

5 Elements UHF Yagi @435Mhz

To increase the performance you may also configure the antenna in stack configuration by making two antenna’s and connect it with a phasing harness for increased performance.

5 Elements UHF stacked

Antenna Gain Simulation and Signal Pattern Using 4Nec2 antenna modeling for individual antenna.

Front to Back Ratio: 9.92dB
Antenna Gain: 10.98 ~ 11dBi
Beamwitdh: 56° Vertical 46° Horizontal

Combined Antenna Pattern

Vertical Pattern 5 Elements UHF Yagi

Vertical Pattern 435Mhz

Horizontal Pattern 5 Elements UHF Yagi

Horizontal Pattern 435

Combined Pattern Free Space

Combined Pattern Free Space

Combined Pattern Ground Effect

Combined pattern with ground effect

5 replies on “Building 5 Elements UHF Yagi (Panda Antenna Build)”

Hello Sir,
Congratulations for your work. From all designs which I saw on the internet I have build this antenna according to your specifications. It’s the best I saw until now and I’m happy with it.
Unfortunately I don’t have a SWR or VNA so I have a short question. It’s there a “middle” position for the shorting stub where I can used the antenna without measurement. Thank you. I wish you good luck. YO6OPD, 73 !

Using an antenna analyzer or SWR meter is still best to check your antenna SWR. In the absence of those the initial tuning position is exactly halfway to the gamma match. Assuming that you follow all the measurements you can easily obtain an SWR of 1.5:1 with the antenna, but it is still best to recheck it with an SWR meter or an antenna analyzer.

Hi. I am EA7AWC and My QRA is: Manuel and I am setting up your Yagi antenna design. Please can you give more details to build the impedance adapter (Gamma match). Tube dimensions, distance to the radiator dipole element, I think it uses a piece of coaxial cable. Thank you

Thank you for answering my question. I hope to be successful, I will do my best. Congratulations good for your yagi antenna design. Best regards

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