1. Is there a possibility of obtaining a negative gain even at resonant frequencies in a patch antenna? (Simulated in CST Microwave Studio)
2. What are the reasons?
1. Is there a possibility of obtaining a negative gain even at resonant frequencies in a patch antenna? (Simulated in CST Microwave Studio)
2. What are the reasons?
Another possibility is that you are measuring a crossed polarization gain or not cutting through the beam peak. It is most likely that the match is really deficient and you have a lossy dielectric. Patch gains are generally in the 6 dBi range with a couple of dB variability depending on the specifics of the design (and ground plane size).