A modified microstrip line for excitation of wide-band dielectric resonator antennas

Author

Rashidian, A. ; Aligodarz, Mohammadreza Tayfeh ; Klymyshyn, D.M. ; Shafai, L.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Manitoba, Winnipeg, MB, Canada

fYear

2012

fDate

25-28 June 2012

Firstpage

1

Lastpage

2

Abstract

A novel approach for effectively feeding a wide-band dielectric resonator antenna (DRA) of very low-permittivity is presented in this paper. It is shown that a tapered microstrip line with optimized length and width can provide excellent impedance matching. The impedance bandwidth of the antenna (S₁₁ <; -10 dB) associated with single resonance mode is over 35%. A minimum reflection coefficient of -60 dB is observed in the simulations for a dielectric resonator with dielectric constant of ε_r = 5. The broadside radiation pattern of the antenna is stable over the impedance bandwidth. Low cross polarization levels (<; -20 dB) across the frequency range 21-30 GHz are noticeable.

Keywords

antenna radiation patterns; broadband antennas; dielectric resonator antennas; impedance matching; microstrip antennas; DRA excitation; antenna radiation pattern; dielectric constant; frequency 21 GHz to 30 GHz; impedance bandwidth; impedance matching; modified microstrip line; reflection coefficient; resonance mode; very low-permittivity; wideband dielectric resonator antennas; Dielectric resonator antennas; Dielectrics; Impedance; Dielectric resonator antenna; microstrip line; wideband antenna;

fLanguage

English

Publisher

ieee

Conference_Titel

Antenna Technology and Applied Electromagnetics (ANTEM), 2012 15th International Symposium on

Conference_Location

Toulouse

Print_ISBN

978-1-4673-0290-6

Type

conf

DOI

10.1109/ANTEM.2012.6262402

Filename

6262402