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Antennas for 3.4 GHz - Printable Version

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Antennas for 3.4 GHz - VK7HH - 05-08-2019

Hi All,
I want to get a slightly better antenna with more gain on 3.4 GHz than my GARC panel that I currently have.

As I'm relatively new, I wonder what others have done? I've seen coffee can feeds etc.. but I don't have a dish just yet (still looking for one).

Perhaps I can modify a gridpack antenna, shorten the dipole. Will the focal point change?
Any other antennas that can easily be converted to 3.4 GHz?

Hayden


RE: Antennas for 3.4 GHz - VK2XAX - 05-08-2019

(05-08-2019, 11:46 AM)VK7HH Wrote: Hi All,
I want to get a slightly better antenna with more gain on 3.4 GHz than my GARC panel that I currently have.

As I'm relatively new, I wonder what others have done? I've seen coffee can feeds etc.. but I don't have a dish just yet (still looking for one).

Perhaps I can modify a gridpack antenna, shorten the dipole. Will the focal point change?
Any other antennas that can easily be converted to 3.4 GHz?



Hayden

Hi Hayden,

I'm in a similar situation so I decided to change out the feed of a 2.4GHZ grid pack for a WA5VJB LPDA. This gives me a dual band antenna for both 2.4 & 3.4 GHz.

The PCB LPDA's handle up to 60w before starting to cook. There's a doc on the net from W1GHZ who did that test Smile

My grid pack is 20dBi on 2.4Ghz and should be similar on 3.4Ghz given the 3.4GHz feed point is not at focus.

I just need to add the coax and N connector and I'm done. I'll post test results when I've finished it.

cheers

Tim


RE: Antennas for 3.4 GHz - VK2XAX - 12-09-2019

Hi Hayden,

Posting here also for the sake of completeness

I finally mounted the LPDA on the dish , SWR @ 2403.100MHz is 1.26 and 1.31 @ 3398.100Mhz

see attached pics.

I just need to work out some sort of radome to weather proof the feed so I can stick it on the tower.

cheers

Tim