A Tunable Internal Antenna With an Epsilon Negative Zeroth Order Resonator for DVB-H Service

A tunable internal antenna with an epsilon negative zeroth order resonator (ENG-ZOR) for digital video broadcasting-handheld service is proposed in this paper. The antenna consists of two helical radiators, an ENG ZOR with two inductors and a variable capacitor to adjust the resonant frequency. The resonant frequency of the designed antenna can be swept from 474-702 MHz by adjusting the capacitance of the variable capacitor by controlling the DC bias voltage. The proposed antenna has a very compact size of 40 mm x 5 mm x 5 mm.This work was supported by the IT R&D program of MKE/IITA [2006-S-018-03, Design of a compact and multi band antenna for a mobile broadcasting service]