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Dear All, I am working to develop a feeding network for phased array of 8 antennas. Each antenna in the array is being fed with same amplitude signal but a constant phase difference of 45 degree. I have simulated this in HFSS as shown in the attachment. but result are not valid. It looks to me there are HFSS have problems in determining the exact result. I tried it with CST. can't get good results. i use em talk to generate extra lenght. which is 6.5 mm practically with HFSS for 100 ohm line. Sub height=0.5 mm of Rogers 5870. f=3.5 GHz. Please do comment.
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