Which patch-antenna for 433MHz? Or helical, yagi or other

I have an Arkbird Antenna Tracker and I am looking for an directional antenna for 433MHz for the tracker. Do any of you know where to get one? There is a four year old thread about this but no answer that can help me.

I bought my antennas (900Mhz and 2.4G) from readymaderc.com. I see they have some 433Mhz antennas but none are directional. I’m afraid I don’t have any more info…

I used a couple of 433MHz 6 element yagi antennas for a project a while back, they are identical to these but from a different supplier that does not appear to sell them any more:


They are OK quality. The gain I calculated in my setup was ~8db. They appear to be reasonably directional with significant drop off after +/- 10 degrees or so

Sure, seems like those might work OK…

Nice Yagi there. When google’ing around I find a lot of 433 MHz Yagi-antennas, but how do I know they work with a standard 3DRobotics/3DR 100mW SIK-radio or a 500mW SIK-radio?

(I got 500 meters with two standard 100mW 3DR SIK-radios yesterday between plane and ground, that is good, but need more reliable for RTK Here+ GNSS).

  1. Scherrer (I got Scherrer RC as well, but this thread is for telemetry for Pixhawk’s): https://hobbyking.com/en_us/433mhz-yagi-ant-reseller.html?___store=en_us

Some others:
2. https://www.amazon.com/Antenna-Element-420MHz-connector-938432/dp/B00FH14PBC
3. https://www.iautomate.com/products/directional-yagi-antenna-433-mhz-7db-gain.html
4. http://www.zdacomm.com/433-mhz-yagi-antenna-series.html
5. https://www.rapidonline.com/lprs-yagi-434a-433-mhz-yagi-antenna-yagi-434-43-0151

Even more:
6. https://www.aliexpress.com/w/wholesale-433mhz-yagi.html
7. https://www.alibaba.com/showroom/433mhz-yagi-antenna.html

I bought 500mw H King one, I didn´t notice much difference so measured it and was 100 mw :open_mouth:

That value Tx-power… shouldnt that be increased to get more power than 100mW?
I am using 100mW standard 3DR SIK-radio and I got 450-500meters on a plane.
But I think I got that Tx-power set to 20.