Solution frequency for HFSS

My question is about the solution frequency in HFSS. I want to get a resonance frequency at 63 Mhz, may i set the solution frequency larger.When i solve it at 63 Mhz i cannot tune the frequency to 63 Mhz, it rapidly changes between 55 and 70. Is it something about mesh dimensions. Also i want to ask, if i solve it at 300 MHz can i get field overlays at 63 Mhz.

I guess you are referring to eigenmode analysis.

If so, you should set the minimum frequency to lower instead of higher. For example, if your structure is expected to resonate at round about 63 MHz, then I would set the minimum frequency to about 30 MHz or so. If it really resonate at 63 MHz, then no matter how many adaptive frequency passes, the eigen-frequency should stay near to 63 MHz. Sometimes it could help if your set the no. of modes greater than 1 say "4".

I think you are using version 9 as you used the word - Field Overlay. I think field is only available at the eigen-frequencies found. You cannot manully change the value of the frequency to display the field at your preferred frequency.

I hope I have answered your question.