Frequency Domain to Time Domain , COMSOL 5.2

Hi,

I have a design which involves two antenna and a gap in between. I have estimated the e-field intensity through the gap, where e-field is a function of frequency and space. However, I need to transfer the plots and the data of e-field in frequency domain to the time domain.

I would like to know how can I transfer the data and plots of e-field to time domain. I am using the RF module, COMSOL 5.2.

Please kindly let me know. Thanks.