I always wonder, how different are all the antennas you can but on banggood, or aliexpress, and finally i can check it using my simple sweep analyzer.
That’s all I found in my drawer, including my very fist DIY helical antenna.
First I used 50 ohm dummy load to determine error which is of course not zero because VTX produce different RF output depending on frequency, and directional coupler is not ideal 🙂
Next i measure all the antenna, correct measured values, using previously determined error values.
Te results look like following.
PS
The patch antenna dimensions:
Hi Kris, thank you for the measurements. Can you please denote the tested antennas somehow? For example, it is not clear which Realacc is which.
Hi,
From Left to right
Immersion RC spiroNET
Realacc Pagoda
Realacc 5.8G 5dBi Pagoda
Leaf blue
Clover black
patch
helical DIY
Regards
Kris
Really nice project.
I was looking some 5,8 GHz testing for FPV antennas and I found you post. Very interesting, and useful.
Not now, but, and I will try to do it. Can I rewrite you post in spanish for my web? Of course I will referer you, .
Thank for your project.
Hi,
Sure, you can translate it, no problem.
Kris
Hello again,
I can’t find any cheap directional coupler over 25€ for 5.8GHz.
Can you show me the light? Without it I will not be able to do your project.
Thank you!!!!
search ebay…
Were i can get the dimensions?
Hi Qczet,
Can you tell me, where can I buy the coupler for 5,8GHz antenna?
Many Thanks
Jerry
can you place photo of the “patch” with a ruler , want to try to make myself but can not find the size or squares , also the thinness of the PCB
Regards
Hi Stanislav,
Reload the post 🙂
Kris