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
- directivity
- varactors
- receiving antennas
- Ferrite devices
- Bandwidth
- Magnetic separation
- Digital video broadcasting
- Dielectric resonator antennas
- Materials
- Antenna measurements
- radiation pattern
- magneto-dielectric material
- antenna radiation patterns
- dielectric resonators
- directive antennas
- magnetic materials
- monopole antennas
- television antennas
- UHF antennas
- dielectric materials
- tunable UHF antenna
- handheld devices
- magneto-dielectric resonator
- DVB-H antenna
- frequency reconfigurable antenna
- folded monopole antenna structure
- varactor diodes
- return loss