Frequency-Tunable Differentially Fed Rectangular Dielectric Resonator Antennas

The frequency-tunable differentially fed rectangular dielectric resonator antenna (DRA) loaded by chip capacitors or chip varactors is investigated. Two conducting strips are attached on two opposite DRA side walls for soldering the loading elements. In each loading case, a frequency-tunable DRA with good match and stable radiation patterns can be obtained. Also, the cross-polarized field level is relatively low. Reasonable agreement between the measured and simulated results is obtained. It is found that the frequency tuning ratio can be controlled by the loading elements and the sizes of the DRA and conducting strips. In particular, for the varactor-loaded case, a frequency-reconfigurable DRA can be obtained by varying the biasing voltage of the varactors.

[1]  Kwok Wa Leung,et al.  On the Differentially Fed Rectangular Dielectric Resonator Antenna , 2008, IEEE Transactions on Antennas and Propagation.

[2]  E H Lim,et al.  Compact Differential Rectangular Dielectric Resonator Antenna , 2010, IEEE Antennas and Wireless Propagation Letters.

[3]  Sean Victor Hum,et al.  Analysis and Design of a Differentially-Fed Frequency Agile Microstrip Patch Antenna , 2010, IEEE Transactions on Antennas and Propagation.

[4]  Frequency tunable rectangular dielectric resonator antenna , 2009, 2009 IEEE Antennas and Propagation Society International Symposium.

[5]  Aldo Petosa,et al.  Dielectric Resonator Antennas: A Historical Review and the Current State of the Art , 2010, IEEE Antennas and Propagation Magazine.

[6]  K. So,et al.  Bandwidth enhancement and frequency tuning of the dielectric resonator antenna using a parasitic slot in the ground plane , 2005, IEEE Transactions on Antennas and Propagation.

[7]  Bahram Jalali,et al.  All-dielectric photonic-assisted radio front-end technology , 2007 .

[8]  Stuart A. Long,et al.  The resonant cylindrical dielectric cavity antenna , 1983 .

[9]  Xiu Yin Zhang,et al.  A Novel Differential-Fed Patch Antenna , 2006, IEEE Antennas and Wireless Propagation Letters.

[10]  R. Mansour.  High-Q tunable dielectric resonator filters , 2009, IEEE Microwave Magazine.

[11]  Lee Ee,et al.  Aperture coupled, differentially fed DRAs , 2009, 2009 Asia Pacific Microwave Conference.

[12]  Kwok Wa Leung,et al.  Frequency tuning of the linearly and circularly polarized dielectric resonator antennas using multiple parasitic strips , 2006 .

[13]  W. R. Eisenstadt,et al.  Microwave differential circuit design using mixed-mode S-parameters , 2006 .

[14]  Gregory H Huff,et al.  A Frequency Reconfigurable Dielectric Resonator Antenna Using Colloidal Dispersions , 2010, IEEE Antennas and Wireless Propagation Letters.

[15]  Ahmed A. Kishk,et al.  Compact dielectric resonator antenna for microwave breast cancer detection , 2009 .

[16]  S. Kingsley,et al.  Tunability of Liquid Dielectric Resonator Antennas , 2007, IEEE Antennas and Wireless Propagation Letters.

[17]  Nenad Popovic.  Review of Some Types of Varactor Tuned DROs , 1999 .

[18]  Y.P. Zhang,et al.  Theory and analysis of differentially-driven microstrip antennas , 2006, IEEE Transactions on Antennas and Propagation.