Analysis of transient responses between coupled dipole antennas by using a simple equivalent circuit

Transient responses between two dipole antennas were analyzed by using a simple equivalent circuit of a dipole antenna. This equivalent circuit is composed of a lossless transmission line and two shunt resistances representing electrical discontinuities at a feed point and tips of the dipole antenna. A closed-form formula for the induced load voltage in the time domain was derived. Since the damping factor due to radiation from antennas is included in this expression, this formulation gives better results than those given by the conventional transmission-line approximation. Measured time histories support the validity of theoretical results.