Efficient calculation of time-domain responses of antennas analyzed in frequency-domain by WIPL-D code

The improvement of the efficiency of the time-domain analysis using frequency-domain response and the Fourier transform is achieved by adjusting the current expansion at each frequency and by interpolating the results in the frequency domain. The future work will include investigation of the minimal number of frequency samples needed for the interpolation, a non-uniform sampling in the frequency domain and the search for the optimal interpolation technique.