High VSWR at Notch Frequency
I drew an antenna as in one of the papers. I analysed it, and created the VSWR graph. It was as below
A very high VSWR at the notch frequency. The VSWR in the paper was about 26. Why did i have a very high VSWR at the notch frequency?
Regards,
Kawther Hamad,
you have an antenna that is well matched at EVERY frequency but one. quick, patent it
That what notch filters do, reject power. If you need a good VSWR, you need an acceptance filter in parallel with the through path with a load, so at the "notch" frequency the power is just diverted into the load.
Frank
I do not think this result is a true or simulating practical antenna. I think it is a matter of HFSS settings. The result from the paper is a maximum VSWR of 26 not 125!.
the point is that i want to obtain a result that is similar to the paper. It is given in the paper that the maximum VSWR is 26 it is not 125. I think i should change some settings in my file. I do not know what are theses settings!
Hi,
both VSWR of 26 and 125 are very large. An analogy would be infinity and infinity + 1. Perhaps the difference is just some material setting resulting in your circuit having higher Q-factor.
regards,
Aaron