1) For switching, you probably need buy or design some sort of RF SP4T
switch.
2) Just a thought....you may want to purchase 4 cheap monopoles (for the
frequency of interest) with SMA connectors on them for testing purposes, in
addition to designing your own antennas (patches for example). This way you
can compare the performance of both sets of antennas. Also, you will not
have to wait on the patch antenna design to test your Butler matrix.
3) You will need to purchase 50 ohm SMA terminations. I don't think we have
enough to terminate the other ports of your Butler matrix while testing 2
ports at a time.
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These are good suggestions.
1. I will incorporate a switching circuit based on a RF SP4T switch. It won't be much different than manual switching in the sense that we will have to physically change a button or jumper to "switch" the circuit, but it will help reinforce component effects due to our higher frequency such as insertion loss.
2 & 3. In our second meeting with Prof. Grbic I stated my concern with the cost of puchasing the monopoles, terminators, etc. in addition to our own components. He indicated that these could be placed under a lab account and not our project account.
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