Re: [discussion]a good resonator and a well matched antenna
Thank u for ur both replies!
to Abhishekabs:i referred "good" resonator just to emphasize the resonator is working normally. that's not the key of this question. i'm sorry i made u confused. yes, maybe the case u mentioned when a patch antenna is used as a resonator is exactly what i came across. could u pls give some examples of these literature. it's also nice if you show some key words that i could look up these papers by myself. many thx!
to radiohead:i don't think the poor radiation efficiency is caused by the losses. the reason is as the following. as u know, for a simple patch antenna working at fundamental mode, the maximum radiation in the broadside direction is achieved as two equivalent magnetic current sources are excited with the same magnitude and reversed phase and could be viewed as a two-unit array. however, in my case, for some reason, the reversed phase condition cannot be satisfied. thus, even if a low loss material (or even vaccum) is used as substrate and PEC is applied as conducting patch and GND in the simulation, low efficiency is still expected(but at a specific frequency, the S11 is below, let's say, -10dB. so it seems, for me, like a resonator.). that also explains ur doubt on the loss versus frequency band because loss is not the key reason for the poor radiation.