A circularly polarized dielectric resonator antenna excited by an asymmetrical U-slot with a backing cavity

Li, B.; So, Kwok Kan; Leung, Kwok Wa

doi:10.1109/lawp.2003.816641

Cited by 30 publications

(16 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The engineering is done on the slot geometry, so that the wave coupled through it differs in space and time by 90°. The most common shape, that is, cross‐shaped slot has been used initially, however, depending upon frequency range and resonator shape, several other slot‐shapes; perturbed annular slot, asymmetric‐slot, spiral‐slot, and offset cross‐slot have also been utilized (Figure ). The literature based on these slot types are summarized here.…”

Section: Dras Related To Circular Polarizationmentioning

confidence: 99%

See 1 more Smart Citation

A state-of-art review on performance improvement of dielectric resonator antennas

Dash

Khan

Antar

2018

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

This article outlines a compressive review on investigation carried out targeting to gain, circular polarization (CP), and mutual coupling reduction in dielectric resonator antenna (DRA). The DRA has already been created a separate position in antenna engineering domain because of its adept characteristics, such as wide bandwidth, high efficiency, low‐loss, and mainly 3D‐design flexibility which is rarely available in conventional antennas. In this context, the research on gain, circular polarization, and mutual coupling are quite interesting and being carried out from the last two decades. The ultimate aim of this article is to (i) give an overview of different techniques adopted in context to gain, CP, and mutual coupling reduction; (ii) give a compressive review of notable research carried out targeting to these three characteristics; and (iii) find out the research gap concentration for furtherance of the same.

show abstract

Section: Dras Related To Circular Polarizationmentioning

confidence: 99%

“… Different slot techniques for circular polarization: A, symmetric slot; B, perturbed annular slot; C, U‐shaped slot; D, spiral slot…”

Section: Dras Related To Circular Polarizationmentioning

confidence: 99%

A state-of-art review on performance improvement of dielectric resonator antennas

Dash

Khan

Antar

2018

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

show abstract

“…Since a CP system is insensitive to the transmitter and receiver orientations, it finds a number of applications including satellite communication. Some CP DRAs were reported, which use either a quadrature feed [29], a single feed [30]- [32], or a tailor-made DRA [33]- [36]. Lately, a parasitic patch was placed on top of a rectangular DRA to generate CP fields [37], [38].…”

Section: Introductionmentioning

confidence: 99%

Strip-fed rectangular dielectric resonator antennas with/without a parasitic patch

Leung

2005

IEEE Trans. Antennas Propagat.

158

View full text Add to dashboard Cite

A rectangular dielectric resonator antenna (DRA) was studied theoretically and experimentally. The rectangular DRA is excited by a strip, which is compatible with a coaxial probe. Both linearly polarized (LP) and circularly polarized (CP) fields of the antenna are considered. In previous studies of the LP rectangular DRA, only the fundamental TE 111 mode has received much attention. In this paper, it is found that the fundamental TE 111 mode, together with the higher-order TE 113 mode, can be used to design a wide-band LP DRA. The bandwidth of the dual-mode DRA can be over 40% for a conventional rectangular DRA with a simple feed. For the CP mode, a parasitic patch is attached on a side wall of the DRA to excite a degenerate mode. In both the LP and CP cases, the finite-difference time-domain (FDTD) method is used to analyze the problems. The results agree reasonably with measurements.Index Terms-Circularly polarization, dielectric resonator antennas (DRAs), finite-difference time-domain (FDTD), parasitic patch, wide-band antennas.

show abstract

“…If a rectangular DRA excited by a narrow rectangular slot positioning 45 • with respect to the sides produces circular polarization. Some other circular polarization DRAs techniques were reported, which use a quadrature feed [9], Single feed [10,11], a parasitic patch placed on top of a rectangular DRA [12,13], or designing a cross-shaped DRA [14]. Recently, the elliptical CP DRAs was introduced [8].…”

Section: Introductionmentioning

confidence: 99%

Novel Modeling and Design of Circularly Polarized Dielectric Resonator Antenna Array

Ain

Qasaymeh²,

Ahmad³

et al. 2012

PIER C

View full text Add to dashboard Cite

Abstract-This paper presents a design of circularly polarized dielectric resonator antenna (DRA) array. The dielectric resonators (DRs) were excited by rectangular aperture coupling slots feed with a linear microstrip. The slot positions were determined based on the characteristic of standing wave ratio over a short ended microstrip to deliver the maximum amount of coupling power to the DRs, in order to improve the array gain Each DR element was rotated 45 • with respect to the sides of the exciting slot to generate circular polarization pattern. The DRA array was modeled and simulated as a parallel RLC input impedance component using Agilent (ADS) software, since that will ensure the resonant frequency of the antenna as primary design step before simulating in (CST) software and doing the measurements. The results of the return loss, gain radiation and pattern axial ratio are shown. The gain of the proposed array in X band was about 8.5 dBi, while the 3 dB axial ratio bandwidth started from 8.14 to 8.24 GHz. The impedance bandwidths started from 8.14 GHz to 8.26 GHz. The proposed DRA exhibited an enhancement of the gain in comparison to a single pellet DRA. The size of the whole antenna structure is about 40 mm × 50 mm and can potentially be used in wireless systems.

show abstract

A circularly polarized dielectric resonator antenna excited by an asymmetrical U-slot with a backing cavity

Cited by 30 publications

References 12 publications

A state-of-art review on performance improvement of dielectric resonator antennas

A state-of-art review on performance improvement of dielectric resonator antennas

Strip-fed rectangular dielectric resonator antennas with/without a parasitic patch

Novel Modeling and Design of Circularly Polarized Dielectric Resonator Antenna Array

Contact Info

Product

Resources

About