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Proceedings ArticleDOI

HEM 12 δ Mode Based Advanced Cylindrical DRA using a New Feeding with Non-Metallic Base

01 Jul 2018-
TL;DR: In this article, a planar feed with non-metallic base ensuring a modified boundary condition has been realized and experimentally verified with an attractive gain of 11 dBi with more than 35 dB co-cross polar isolation.
Abstract: A new concept of realizing the HEM 12δ mode in CDRA has been investigated. Excitation of lone HEM 12 δ mode is the salient feature of the proposed design. A planar feed with non-metallic base ensuring a modified boundary condition has been realized and experimentally verified. The antenna promises of an attractive gain of 11 dBi with more than 35 dB co-cross polar isolation.
Citations
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Proceedings ArticleDOI
01 Dec 2019
TL;DR: In this article, a simple microstrip coupled cylindrical dielectric resonator antenna (CDRA) is capable of resonating at several frequencies, among which a few resonances (modes) exhibit excellent radiation characteristics.
Abstract: A simple microstrip coupled cylindrical dielectric resonator antenna (CDRA) is capable of resonating at several frequencies, among which a few resonances (modes) exhibit excellent radiation characteristics. For a CDRA of high dielectric constant (e r = 24), in addition to the dominant HEM 11δ mode, the HEM 21δ mode is excited as the second mode, and the HEM 123+δ mode as the third mode. The third mode is of great interest as it produces broadside radiation with a peak gain of ~ 9.8 dBi, which is about ~ 3.9 dB higher than that of the first mode and ~ 5.4 dB higher than that of the second mode. In the measurements, a peak gain of 9.4 dBi has been verified for the HEM 123+δ mode.

1 citations

Patent
05 Jun 2020
TL;DR: In this article, a dual-polarization millimeter wave dielectric resonator antenna for a mobile terminal is presented, where a metal column and an air column are arranged on the upper and the air column is formed in the middle layer metal, respectively.
Abstract: The invention discloses a dual-polarization millimeter wave dielectric resonator antenna for a mobile terminal, and belongs to the technical field of wireless communication and antennas. The substrateintegrated cylindrical dielectric resonator antenna comprises upper-layer metal, an upper dielectric substrate, middle-layer metal and a lower dielectric substrate which are all rectangular and are attached in sequence, wherein a metal column and an air column are arranged on the upper dielectric substrate, a rectangular opening a and a rectangular opening b are formed in the middle-layer metal,and a microstrip feeder a and a microstrip feeder b cover the lower surface of the lower dielectric substrate; radio frequency signals are respectively input from the starting ends of the microstrip feeder a and the microstrip feeder b, are coupled into the cylindrical dielectric resonator through the rectangular opening a and the rectangular opening b, and finally are radiated into the free spacethrough dielectric resonance. The problem that an existing millimeter wave antenna is single in polarization is solved, the impedance bandwidth of the antenna is large, and the sensitivity to peripheral equipment such as mobile phone glass and a shell is low; and meanwhile, the antenna is easy to machine, and the integration level of the antenna and a mobile phone terminal is high.
References
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Journal ArticleDOI
TL;DR: In this paper, a cylindrical dielectric resonator antenna (CDRA) has been examined with a view for using it as another radiating mode with broadside radiation patterns.
Abstract: A resonant mode (HEM12δ), other than those ( HEM11δ and TM01δ) conventionally excited and used in a cylindrical dielectric resonator antenna (CDRA) has been examined with a view for using it as another radiating mode with broadside radiation patterns. Excitation of the mode, being the most challenging aspect, has been discussed and resolved by employing an innovative technique. The proposed concept has been successfully verified and experimentally demonstrated for the first time. More than 8-dBi peak gain with excellent broadside radiation has been obtained from a prototype shaped from a commercially available low-loss dielectric material with relative permittivity 10.

132 citations


"HEM 12 δ Mode Based Advanced Cylind..." refers background in this paper

  • ...Guha [3] for the first time successfully excited the first higher order mode (HEM12δ) in a probe fed CDRA to produce broadside radiation, using a current ribbon....

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Journal ArticleDOI
TL;DR: In this article, a composite aperture has been conceived to excite cylindrical dielectric resonator antenna (CDRA) simultaneously with two different modes, resulting in broadside radiations at two adjacent bands.
Abstract: A composite aperture has been conceived to excite cylindrical dielectric resonator antenna (CDRA) simultaneously with two different modes, resulting in broadside radiations at two adjacent bands. Threefold objectives of this investigation includes: (i) to realize ${\rm HEM}_{{12\delta}}$ mode in a practical CDRA without involving any unwanted hybrid mode; (ii) to explore composite aperture type feed, which serves as equivalent magnetic and electric dipoles to launch ${\rm HEM}_{{11\delta}}$ mode and ${\rm HEM}_{{12\delta}}$ mode, respectively; and hence (iii) to achieve a dual-mode dualband CDRA without compromising in any enlargement of antenna dimension. ${\rm HEM}_{{12\delta}}$ mode is a recent introduction by the present authors as a broadside radiating mode in a CDRA, although this investigation demonstrates a practically feasible application for the first time. Systematic study of newly proposed composite aperture is followed by experimental investigation with a set of prototypes operating at S and C bands. As much as 6 dBi gain with 7–8% matching bandwidth for each operating band has been experimentally demonstrated.

64 citations

01 Jan 2007

44 citations


"HEM 12 δ Mode Based Advanced Cylind..." refers background in this paper

  • ...The CDRA under investigation (h  r  10 mm and r = 10) resonates at 4 GHz when excited in dominant HEM11δ mode [1]....

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  • ...INTRODUCTION Dielectric Resonator Antennas (DRAs) are widely used today, for microwave and wireless applications [1]....

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01 Jan 2015

17 citations


"HEM 12 δ Mode Based Advanced Cylind..." refers methods in this paper

  • ..., HEM11δ and HEM12δ simultaneously have been achieved using composite aperture feeding technique [4]....

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