I am trying to design a feeding mechanism for 8 patch antenna array.
I have used 50 ohm transmission lines followed by a 70.71 ohm quarter wave transformers(circular shape). Please see attached image for more clarity. I have made inset feed patches. They have good performance at 2.3 Ghz.
It will be a great help if you can let me know any fundamental issues in the design or if there is a better way to design feeding for patch array.
The Wilkinson power divider is a pretty standard architecture. The only comment I have is that you could make it more space efficient with a N-branch power divider, but those are more difficult to make.
It seems fine. The 70 Ohm lines should off course be quarter wavelength at your desired frequency. The 50 Ohm ones though can be made smaller (if you want to).
The distance between center to center of 8 patches have to be same. At the same time, the striplines A&B need to be equal. Somehow, I can't solve both the problems simultaneously. I tried a lot of calculations.
While calculating distance from patch to patch, I have not considered inset feed length in the total length of patch.
I guess A & B cannot be unequal. Should I consider inset feed length and then calculate center to center spacing?
It will be a great help if you can help to resolve the problem.
Hey FvM,
I only know how to design Wilkinson power divider. If you could suggest any material for further study of different power dividers, I can proceed to solve this problem.
I have a personal aim to make this array work and observe results.
You don't have to do all the lines straight you can calculate the striplines according to furthest patch antenna and then come back to feed from there.