Impulse Radiating Log-Periodic Dipole Array Antenna Using Time-Reversal Technique

A novel concept based on time-reversal technique is presented to achieve a nondispersive log-periodic dipole array (LPDA) antenna targeting in an impulse radiating antenna (IRA). The idea is to use a passive interface circuit module at the feeding line of the antenna, which works as the time-reversal prefiltering. The proposed method results in a nondispersive (high-fidelity) antenna by keeping the same LPDA structure that has the features of the LPDA antenna in terms of radiation pattern, VSWR, gain, and efficiency. The results show 40% improvement in the fidelity factor of the antenna.