Compact slot and dielectric resonator antenna with dual-resonance, broadband characteristics

The goal of this study is to improve the bandwidth of a miniaturized antenna. The proposed technique combines a slot antenna and a dielectric resonator antenna (DRA) to effectively double the available bandwidth without compromising miniaturization or efficiency. With proper design it is observed that the resonance of the slot and that of the dielectric structure itself may be merged to achieve extremely wide bandwidth over which the antenna polarization and radiation pattern are preserved. In addition, using the DRA, a volumetric source, improves the radiation power factor of the radiating slot. A miniaturized antenna figure of merit (MAFM) is defined to simultaneously quantify aspects of miniaturized antenna performance including the degree of miniaturization, efficiency, and bandwidth. Figures for various common types of antennas are given and compared with that of the proposed structures. In order to determine the effects of varying design parameters on bandwidth and matching, sensitivity analysis is carried out using the finite-difference time-domain method. Numerous designs for miniaturized slot-fed dielectric resonator antennas are simulated and bandwidths exceeding 25% are achieved. Two 2.4 GHz antennas are built, characterized, and the results compared with theory.

[1]  Ahmed A. Kishk,et al.  Input impedance of aperture-coupled dielectric resonator antennas , 1996 .

[2]  Zhipeng Wu,et al.  Aperture‐coupled cylindrical dielectric resonator antenna , 1999 .

[3]  A. Kishk,et al.  Analysis of rectangular dielectric resonator antennas excited through a slot over a finite ground plane , 2000, IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium. 2000 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (C.

[4]  Y.M.M. Antar,et al.  Theoretical investigation of aperture-coupled rectangular dielectric resonator antenna , 1996 .

[5]  H.A. Wheeler,et al.  Fundamental Limitations of Small Antennas , 1947, Proceedings of the IRE.

[6]  Michel Cuhaci,et al.  Design and analysis of multisegment dielectric resonator antennas , 2000 .

[7]  K. Sarabandi,et al.  Novel artificial embedded circuit meta-material for design of tunable electro-ferromagnetic permeability medium , 2003, IEEE MTT-S International Microwave Symposium Digest, 2003.

[8]  Ahmed A. Kishk,et al.  Effect of air gap on cylindrical dielectric resonator antenna operating in TM01 mode , 1994 .

[9]  A. Ittipiboon,et al.  Theoretical and experimental investigations on rectangular dielectric resonator antennas , 1997 .

[10]  Ahmed A. Kishk,et al.  Conical dielectric resonator antennas for wide-band applications , 2002 .

[11]  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].

[12]  M. Cuhaci,et al.  An investigation of a novel broadband dielectric resonator antenna , 1996, IEEE Antennas and Propagation Society International Symposium. 1996 Digest.

[13]  C. Balanis.  Advanced Engineering Electromagnetics , 1989 .

[14]  M. H. Neshati,et al.  The determination of the resonance frequency of the TE/sub 111//sup y/ mode in a rectangular dielectric resonator for antenna application , 2001 .

[15]  Yahia M. M. Antar,et al.  Recent advances in dielectric-resonator antenna technology , 1998 .

[16]  R. Mongia.  Theoretical and experimental resonant frequencies of rectangular dielectric resonators , 1992 .

[17]  Kwok Wa Leung,et al.  Input impedance of aperture coupled hemispherical dielectric resonator antenna , 1993 .

[18]  Ahmed A. Kishk,et al.  BANDWIDTH ENHANCEMENT FOR SPLIT CYLINDRICAL DIELECTRIC RESONATOR ANTENNAS , 2001 .

[19]  F. Croq,et al.  Large bandwidth aperture-coupled microstrip antenna , 1990 .

[20]  Yahia M. M. Antar,et al.  Aperture fed rectangular and triangular dielectric resonators for use as magnetic dipole antennas , 1993 .

[21]  M. H. Neshati,et al.  The Determination of the Resonance Frequency of the TEy111 Mode in a Rectangular Dielectric Resonator for Antenna Application , 2001 .

[22]  D. Schaubert,et al.  Analysis of an aperture coupled microstrip antenna , 1986 .

[23]  H. Mosallaei.  Complex layered materials and periodic electromagnetic band-gap structures: Concepts, characterizations, and applications , 2001 .

[24]  Ahmed A. Kishk,et al.  Wide-band truncated tetrahedron dielectric resonator antenna excited by a coaxial probe , 2003 .