PCB Patch Antenna
PCB Patch Antenna
(OP)
I am trying to design a circularly polarized patch antenna to operate at 915MHz for an RFID reader. I intend to print the design on a PCB, as that sounds like a reasonable solution, and cheap which is a constraint. The antenna needs to be circularly polarized, and have a (max-allowed) gain of 9 dBic.
In thread247-288566: 915Mhz Circular Patch RFID antenna
I see that Tony you said you were trying to do this, I feel as if you could be of assistance, but I would appreciate any tips in trying to tackle this problem.
In thread247-288566: 915Mhz Circular Patch RFID antenna
I see that Tony you said you were trying to do this, I feel as if you could be of assistance, but I would appreciate any tips in trying to tackle this problem.





RE: PCB Patch Antenna
Feeding it with a 90 hybrid purchased part makes the antenna design easier than trying to manufacture it without a 90 hybrid.
What is your price and volume target?
RE: PCB Patch Antenna
I am trying to produce 5-10 to test a system, with less than $500 for the antennas.
I appreciate any further design suggestions.
RE: PCB Patch Antenna
I did some modeling: we can get you Circularly polarized 9 dBic Gain at 915 MHz if footprint/ ground plane will be 250 x 250 mm. If you still did not find your solution I offer to construct and send you hand-made prototype for small fee. Tuned properly. It will be suspended plate, truncated patch; probe-fed; terminated with SMA connector. No covers. You can then copy it and build your own.
If you need just one or two Antennas you will be better off buying them from http://www.microcom.us/mt262006trhak.html
Probably the same, slightly larger ground plane.