Aperture-coupled Dielectric Resonator Antenna Research Articles

Aperture Coupled Dielectric Resonator Antenna Embedded in a Secondary Substrate for Mechanical Firmness

Aperture Coupled Dielectric Resonator Antenna Embedded in a Secondary Substrate for Mechanical Firmness

Design of aperture‐coupled dielectric resonator antenna free from higher order modes and harmonics

ABSTRACTControlling of higher order modes and harmonics in an aperture coupled Dielectric Resonator Antenna has been explored. A compact design of improvised feed using defected ground structure (DGS) has been used and up to 15 dB suppression has been experimentally demonstrated covering more than 80% impedance bandwidth. Application of DGS has been discussed and the suppression characteristics have been experimentally demonstrated. No detrimental effect caused by the DGS on the radiations of the fundamental mode has been ensured experimentally. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1980–1983, 2015

Bandwidth Enhancement of Dielectric Resonator Reflectarray Antenna

Aperture-coupled dielectric resonator antenna is proposed using a novel reflectarray antenna unit cell structure. It is shown that a bowtie-shaped slot can enhance the bandwidth performance of a reflectarray antenna. The unit cell's reflection phase response was verfified experimentally using the waveguide simulator method. An array comprising of 256 elements was simulated using the finite integration technique based on the proposed unit cell. The array exhibits a 3-dB gain bandwidth of 28% and radiation efficiency of 43.8%. These results were validated using the transmission-line method.

A New Dielectric Resonator Antenna Element for Circularly Polarized Reflectarray Antenna

An aperture-coupled dielectric resonator antenna loaded with a rotated strip is proposed as a new circularly polarized reflectarray antenna element. The unit cell is fabricated, and its phase response is validated using the waveguide simulator method, where the finite integration technique is used to analyze the 256-element array. Excellent results are obtained with the proposed antenna, with 3-dB axial ratio bandwidth of 30% and 3-dB gain bandwidth of 18%. These results were validated using the transmission-line method.

Analysis of aperture-coupled hemispherical dielectric resonator antenna with a perpendicular feed

The aperture-coupled dielectric resonator antenna (DRA) with a perpendicular feed is studied theoretically and experimentally. This excitation scheme has the advantage that it isolates the DRA from active circuitry and meanwhile fully utilizes the whole feed substrate for active-circuitry integration. The effects of the slot length, slot offset, and substrate permittivity on the input impedance are discussed.

Aperture-coupled dielectric resonator antenna using a strip-line feed

An aperture-coupled dielectric resonator antenna using a strip-line feed is investigated experimentally. As compared to the previous microstrip-line version, the new configuration eliminates the problems of backside radiation through the slot and frequency dispersion. The measured return loss, radiation patterns, and antenna gain of the new configuration are given in this letter. ©2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 24: 120–121, 2000.

On the effect of ground-plane thickness on an aperture-coupled dielectric resonator antenna

A hemispherical dielectric resonator antenna excited by a microstrip feedline through a narrow slot in a thick ground plane is studied theoretically and experimentally. A numerical method based on a combination of the spectral Green's function, modal Green's function, and the method of moment is used to investigate the input characteristics of the dielectric resonator antenna system. The effects of ground-plane thickness on input resistance, resonant frequency, and impedance bandwidth of the dielectric resonator antenna are discussed. © 2000 John Wiley & Sons, Inc. Int J RF and Microwave CAE 10: 271–277, 2000.

Computation of the radiation patterns of a rectangular dielectric-resonator antenna using the method of moments

A low-profile, rectangular, aperture-coupled dielectric-resonator antenna is analyzed using the method of moments (MoM). The analysis is formulated by deriving volume-integral equations for the resonator and the substrate. Theoretical E- and H-plane patterns obtained from the MoM compare well with measurements and previously published FDTD results. © 2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 27: 382–384, 2000.

Aperture coupled dielectric resonator antenna with a thick ground plane

The aperture-coupled hemispherical dielectric resonator antenna with a thick ground plane is investigated theoretically and experimentally. The effects of the ground plane thickness on the input impedance, resonant frequency, and front-to-back radiation ratio are studied.

TLM modelling of multilayer coupling structures for microwave PCS antennas

This paper presents a multilayer architecture applicable to integrated planar active array antennas in personal communication systems (PCSs). The configuration uses a combination of microstrip and stripline transmission lines on stacked substrates to integrate printed patch antennas, microwave active circuits, signal-distribution networks, etc., into a compact multilayer system. A general-purpose EM simulator based on the transmission-line matrix (TLM) has been developed to model some vertical interconnections in a multilayer construction. Good agreement is obtained between measurements and numerical results of a monolithic microwave integrated circuit (MMIC) via hole, a novel broadband stripline coupler, and an aperture-coupled dielectric resonator antenna.

Aperture-coupled dielectric resonator antenna with a perpendicular feed

The aperture-coupled dielectric resonator antenna with a perpendicular feed is investigated experimentally. The return loss, radiation pattern, and antenna gain of the new configurations are given and discussed.

Active aperture-coupled rectangular dielectric resonator antenna

A novel configuration of an active aperture-coupled dielectric resonator antenna is reported. The design methodology is discussed and experimental results in the frequency range 4-6 GHz are presented. A comparison between an active aperture-coupled dielectric resonator antenna and an active aperture-coupled microstrip patch antenna is presented. The results presented should have useful potential applications in phased arrays and communication systems. >