A High-Power Reflector Impulse Antenna with Dual-Tem Source

Abstract

There are different demands on radiation efficiency and direction pattern according to various ultra-wideband (UWB) antennas and high power applications. To obtain more radiating gain on bore-sight of paraboloidal reflector and centralized radiating direction, a novel feeding structure called dual-TEM source has been designed and applied in half-paraboloidal reflector impulse radiating antenna (IRA) applications. Simulation results proved that this proposed half-paraboloidal reflector IRA with dual-TEM source provided greater radiation performance on bore-sight as a result of the synthesized power in the aperture space of paraboloid. Moreover, lots of simulation work and comparison have been done in different feeding models to summarize a relative optimal feeding structure.

Design of an Impulse Radiating Antenna Using a Curved TEM-Wire Fed Parabola

“…As mentioned before, the parabola with wide throat has its main lobe split so that its increase of directivities is limited. With a wide throat region, the phase centers of the incident fields along the left and right arms fall apart from the focus of the parabola, of which state is similar to the case of [14]. Figure 12 shows efficiencies of the TEM-wire fed parabola.…”

A Time-Domain Approach for the Fast Design of Reflector Impulse-Radiating Antennas

“…On the other hand, an accessible radiation pattern, which can synchronously evaluate the amplitude and time-delay of the radiated pulses in time-domain, is not known [6]. Although various numerical methods, such as the finite difference time domain (FDTD) method, have been applied in the design of reflector IRAs, they need to be done for many times and a lot of computing time are required [21][22][23].…”