An Ultra-Wideband Dielectric Rod Antenna Fed by a Planar Circular Slot

作者：Leib Mario^*; Vollmer Andreas; Menzel Wolfgang

来源：IEEE Transactions on Microwave Theory and Techniques, 2011, 59(4): 1082-1089.

DOI：10.1109/TMTT.2011.2114050

• Antennas
• dielectric antennas
• directive antennas
• ultra-wideband (UWB) antennas

A novel ultra-wideband (UWB) dielectric rod antenna fed by a planar structure is presented. The planar structure consists of a circular slot antenna supplied by a dipole. This planar antenna excites the HE(11) mode of an attached circular dielectric rod. Due to this combination, a broadband and low-dispersive overall antenna performance is achieved. Furthermore, an additional reflector at the backside of the antenna increases the directivity. With this configuration, a return loss better than 10 dB from 3.5 to 11.8 GHz is achieved with a nearly constant gain and a mean gain of 8.7 dBi. Beside the standard characterization, the system performance of the antenna is evaluated by means of the fidelity factor calculated from time-domain measurements and applying a UWB impulse generator.

• 出版日期2011-4