A short dipole antenna

In order to reduce the effective area of the receiving antenna to receiving microwave power in high electric field regions, a short dipole antenna is investigated numerically and experimentally in this paper. The short dipole antenna is a variation of the conventional half-wave antenna. A 50 Ω coaxial transmission line with two symmetrical narrow slots is employed as a feeder of the short dipole antenna. The simulation results show that the general gain and the effective area of the short dipole antenna to receiving microwave power are −10.21dBi and 2.19 cm
²
respectively. The power capacity of the short dipole antenna is about 92 kW, so the maximum power flow density, which can be measured by the short dipole antenna, is 42kW/cm
²
. The general gain of the short dipole antenna is calibrated with the Agilent E8363B network analyzer in an anechoic chamber and the calibrated results is in good agreement with the simulation result. The high-power tests are performed on an improved magnetically insulated transmission line oscillator (MILO). The measured results of the short dipole antenna are accordant with those of two cutoff free-field probes, which show that the short dipole antenna can be used to measure high-power microwave in laboratory.