Title :
A Low-Profile and High-Permittivity Dielectric Resonator Antenna With Enhanced Bandwidth
Author :
Ying Liu ; Hu Liu ; Ming Wei ; Shuxi Gong
Author_Institution :
Sci. & Technol. on Microwave Lab., Xidian Univ., Xi´an, China
Abstract :
A dielectric resonator antenna of very high permittivity has been proposed. The antenna is designed based on a multilayered structure. To realize low profile and relatively large impedance bandwidth simultaneously, two separate dielectric resonators of high permittivity are placed symmetrically on top of the antenna structure. A low-permittivity dielectric substrate is inserted between the resonators and the ground. The total height of the antenna is 1.57 mm or 0.039λ (λ is the wavelength at the center frequency.) An enhanced bandwidth of 10.49% has been realized. The proposed antenna has stable radiation patterns across the whole operating band. Relatively high antenna gains over 6 dBi and a low cross-polarization level of -25 dB are also achieved.
Keywords :
antenna radiation patterns; dielectric resonator antennas; electromagnetic wave polarisation; permittivity; antenna radiation patterns; gain 6 dB; high permittivity dielectric resonator antenna; impedance bandwidth enhancement; low cross-polarization; low-permittivity dielectric substrate resonator antenna; multilayered structure; size 1.57 mm; Antenna measurements; Bandwidth; Dielectric resonator antennas; Dielectrics; Frequency measurement; Permittivity; Resonant frequency; Bandwidth; dielectric resonator antenna; high permittivity; low profile;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2385862
