New Half-Hemispherical Dielectric Resonator Antenna for Broadband Monopole-Type Radiation

A new half-hemispherical dielectric resonator antenna (h-HDRA) is proposed and a two-element h-HDRA configuration is employed to design a broadband monopole-type radiator. Two half sections of a hemispherical DRA are employed to enhance the impedance bandwidth by introducing an additional resonant mode. Since the new geometry of an h-HDRA is studied here for the first time, it is characterized using simulation and experimental studies. Two closely spaced resonant modes, which in a two-element h-HDRA generate monopole-type radiation are investigated. Results for both the single and two-element h-HDRAs are presented. As much as 35% impedance bandwidth (S11<-10dB) with more than 5 dBi peak gain, 99.08% efficiency and monopole-type radiation pattern has been demonstrated using a prototype occupying a compact volume measuring 0.48lambda0 by 0.2lambda0 approximately, lambda0 being the wave length corresponding to the center of the impedance bandwidth

[1]  Kwai-Man Luk,et al.  Simple formula for analysing the centre-fed hemispherical dielectric resonator antenna , 1997 .

[2]  Jawad Y. Siddiqui,et al.  Resonant resistance of probe- and microstrip-line-fed circular microstrip patches , 2005 .

[3]  Kwai-Man Luk,et al.  Characteristics of dielectric ring resonator antenna with an air gap , 1994 .

[4]  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.

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

[6]  Kai Fong Lee,et al.  Performance comparisons between dielectric resonator antennas and printed microstrip patch antennas at X-band , 2006 .

[7]  Kwok Wa Leung,et al.  Conformal strip excitation of dielectric resonator antenna , 2000 .

[8]  A.A. Kishk,et al.  Analysis of dielectric-resonator antennas with emphasis on hemispherical structures , 1994, IEEE Antennas and Propagation Magazine.

[9]  Ahmed A. Kishk,et al.  Numerical analysis of stacked dielectric resonator antennas excited by a coaxial probe for wideband applications , 2003 .

[10]  Ahmed A. Kishk,et al.  Rod‐ring dielectric resonator antenna , 2004 .

[11]  W. C. Wong,et al.  Circularly polarized slot-coupled dielectric resonator antenna with a parasitic patch , 2002, IEEE Antennas and Wireless Propagation Letters.

[12]  Kwai-Man Luk,et al.  Theory and experiment of a coaxial probe fed hemispherical dielectric resonator antenna , 1993 .

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

[15]  D. Kajfez,et al.  Effect of fabrication imperfections for ground-plane-backed dielectric resonator antennas with coaxial excitation , 1994, Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 1994].

[16]  Kwai-Man Luk,et al.  Input impedance of hemispherical dielectric resonator antenna , 1991 .

[17]  A. Kishk,et al.  Experimental study of broadband embedded dielectric resonator antennas excited by a narrow slot , 2005, IEEE Antennas and Wireless Propagation Letters.

[18]  K. Esselle,et al.  A hybrid-resonator antenna: experimental results , 2005, IEEE Transactions on Antennas and Propagation.

[19]  Ryuji Kohno,et al.  Ultra wideband antenna , 2004, IEEE Communications Magazine.

[20]  Max J. Ammann,et al.  On pattern stability of the crossed planar monopole , 2004 .

[21]  Allen W. Glisson,et al.  Evaluation of Modes in Dielectric Resonators Using a Surface Integral Equation Formulation , 1983 .

[22]  K.F. Lee,et al.  Wideband simple cylindrical dielectric resonator antennas , 2005, IEEE Microwave and Wireless Components Letters.

[23]  Ahmed A. Kishk,et al.  Wideband disc‐ring dielectric resonator antenna , 2002 .

[24]  Stuart A. Long,et al.  Resonant hemispherical dielectric antenna , 1984 .

[25]  D. Guha,et al.  Four-Element Cylindrical Dielectric Resonator Antenna for Wideband Monopole-Like Radiation , 2006, IEEE Transactions on Antennas and Propagation.

[26]  Ahmed A. Kishk,et al.  Rod-ring dielectric resonator antenna: Research Articles , 2004 .

[27]  A. Ittipiboon,et al.  Ultra wideband monopole/dielectric resonator antenna , 2005, IEEE Microwave and Wireless Components Letters.

[28]  Ahmed A. Kishk,et al.  Input impedance of dielectric resonator antennas excited by a coaxial probe , 1994 .

[29]  Ahmed A. Kishk,et al.  Slot excitation of the dielectric disk radiator , 1995 .

[30]  H. Ng,et al.  The slot-coupled hemispherical dielectric resonator antenna with a parasitic patch: applications to the circularly polarized antenna and wide-band antenna , 2005 .

[31]  K.-L. Wong,et al.  Analysis of a hemispherical dielectric resonator antenna with an airgap , 1993, IEEE Microwave and Guided Wave Letters.

[32]  Allen W. Glisson,et al.  Computed Modal Field Distributions of Isolated Dielectric Resonators , 1984 .