A Broadband Hybrid Water Antenna for Hand-Portable Applications

Abstract

In this letter, a broadband, low-profile, hybrid water antenna is proposed. The hybrid structure combines the resonance of the dielectric resonator (DR) and the resonance of the monopole together to cover the required frequency band. The unique features of the water DR are transparency, reconfigurability, and liquidity, which allows complex structures (including the antenna feeding line) to be placed and tuned inside water easily. Both the computer simulations and measurements are conducted to validate the antenna performance. The proposed antenna has a -6 dB impedance bandwidth from 430 to 900 MHz (a fractional bandwidth of 70%). Compared to other antennas for this band, this new antenna has a wider bandwidth, more compact size, and simpler structure. It is therefore a very promising candidate for hand-portable applications such as DVB-H (470-862 MHz).