A New Magneto-Dielectric Material Loaded, Tunable UHF Antenna for Handheld Devices
Résumé
In this letter, the impact of a magneto-dielectric resonator on a DVB-H antenna is investigated. A frequency reconfigurable antenna using a folded monopole antenna structure and varactor diodes is proposed. Two different designs are realized with and without the resonator. A measured instantaneous -6-dB bandwidth wider than 8 MHz is obtained continuously between 470 and 862 MHz for both prototypes. Design methodology is described. Measured return loss, gain, directivity, and radiation pattern are presented for different frequencies.
Mots clés
dielectric materials
antenna radiation patterns
dielectric resonators
directive antennas
magnetic materials
monopole antennas
UHF antennas
magneto-dielectric material
tunable UHF antenna
handheld devices
magneto-dielectric resonator
DVB-H antenna
frequency reconfigurable antenna
folded monopole antenna structure
varactor diodes
return loss
directivity
radiation pattern
Antenna measurements
Materials
Dielectric resonator antennas
Digital video broadcasting
Magnetic separation
Bandwidth
Ferrite devices
receiving antennas
varactors
television antennas