Title :
A Yagi-Uda antenna made of high-permittivity ceramic material
Author :
Hesselbarth, Jan ; Geier, Daniel ; Diez, Miguel Angel Bueno
Author_Institution :
Inst. of Radio Freq. Technol., Univ. of Stuttgart, Stuttgart, Germany
Abstract :
Half-wavelength dipole and 3-element Yagi antennas made of high-permittivity dielectric ceramic rods instead of metal wires are described. For a frequency of operation around 3.7 GHz, dielectric rods of 4×4 mm2 cross-section and relative permittivity of 34 can replace the metal wires in these antennas. A structure allowing to feed the dielectric dipole by means of a balanced (two-wire) transmission line is described. The 3-element dielectric Yagi antenna shows a simulated directivity of 8.0 dBi, a simulated as well as measured front-to-back ratio of 10.2 dB, a measured respectively simulated -10 dB impedance bandwidth of 11.6% and 9.9% at 3.7 GHz, and a simulated radiation efficiency of 94%.
Keywords :
Yagi antenna arrays; ceramics; dielectric materials; dipole antenna arrays; permittivity; 3-element dielectric antenna; Yagi-Uda antenna; balanced transmission line; cross-section; dielectric ceramic rods; dielectric dipole; efficiency 94 percent; half-wavelength dipole antennas; high-permittivity ceramic material; relative permittivity; simulated directivity; two-wire transmission line; Antenna measurements; Ceramics; Dielectric measurement; Dielectric resonator antennas; Dielectrics; Dipole antennas; Metals; Yagi antennas; dielectric resonator antennas;
Conference_Titel :
Antennas and Propagation Conference (LAPC), 2013 Loughborough
Conference_Location :
Loughborough
DOI :
10.1109/LAPC.2013.6711859
