Omnidirectional Linearly and Circularly Polarized Rectangular Dielectric Resonator Antennas

Pan, Yong; Leung, Kwok Wa; Lu, Kai

doi:10.1109/tap.2011.2173122

Cited by 120 publications

(59 citation statements)

References 19 publications

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“…Then these CP array elements are arranged in a circular/square formation to achieve omnidirectional radiation. In addition, the omnidirectional CP properties can be realized by dielectric resonator antennas (DRA) [7][8][9]. In general, the DRA fed centrally by a coaxial probe could offer a vertical polarization in these designs.…”

Section: Introductionmentioning

confidence: 99%

Dual-Band Omnidirectional Circularly Polarized Patch Antenna With Etched Slots and Shorting Vias

Zhang¹,

Zhang²,

Wang³

et al. 2017

PIER C

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Abstract-A dual-band omnidirectional circularly polarized (CP) patch antenna with conical radiation patterns is presented in this paper. The antenna consists of a patch with inclined slots, a ground plane with L-shaped slots and a coaxial probe. In addition, by loading shorting vias between the patch and the ground plane, the vertical polarizations of the proposed antenna at TM 01 and TM 02 modes can be obtained. Two sets of slots etched on the ground and the patch contribute to the horizontal polarizations for the two modes, respectively. Omnidirectional CP fields can be achieved at both resonant modes when the two orthogonal polarizations are equal in amplitude and different in phase by 90 • . To verify the design, a prototype operating at 2.4 GHz WLAN and 3.5 GHz WiMAX bands has been fabricated and measured. The measured average axial ratios (ARs) at two resonant modes in the azimuth plane are 1.1 and 1.5 dB, respectively. Experimental results show good agreement with the simulated data.

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Section: Introductionmentioning

confidence: 99%

Dual-Band Omnidirectional Circularly Polarized Patch Antenna With Etched Slots and Shorting Vias

Zhang¹,

Zhang²,

Wang³

et al. 2017

PIER C

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“…With the wideband demand for high performance and big capacity telecommunication systems, wideband omnidirectional CP antennas have been proposed and investigated over the past few years [1][2][3][4][5][6][7][8][9][10][11]. Working at TM 21 mode of a circular microstrip antenna, early wideband omnidirectional CP antenna [1] uses a 90 • phase shifter and hybrid feeding mechanism to get the broad working bandwidth of 28.2%.…”

Section: Introductionmentioning

confidence: 99%

“…Working at TM 21 mode of a circular microstrip antenna, early wideband omnidirectional CP antenna [1] uses a 90 • phase shifter and hybrid feeding mechanism to get the broad working bandwidth of 28.2%. Then, omnidirectional CP property is gained by introducing the inclined slots on the sidewalls of a rectangular linear polarized (LP) dielectric resonator antenna (DRA) [2]. Furthermore, the omnidirectional CP antenna in [3] achieves wide operating bandwidth of 25% by embedding a metal parasitic strip on each of the inclined slots of the CP DRA in [2].…”

Section: Introductionmentioning

confidence: 99%

“…Then, omnidirectional CP property is gained by introducing the inclined slots on the sidewalls of a rectangular linear polarized (LP) dielectric resonator antenna (DRA) [2]. Furthermore, the omnidirectional CP antenna in [3] achieves wide operating bandwidth of 25% by embedding a metal parasitic strip on each of the inclined slots of the CP DRA in [2]. Using the parasitic dielectric parallelepiped elements as the wave polarizers which convert omnidirectional LP fields radiated by the probe into CP fields, a CP dielectric bird-nest antenna [4] with conical radiation patterns has a broad operating bandwidth of 41%.…”

Section: Introductionmentioning

confidence: 99%

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Low-Profile Wideband Circularly Polarized Microstrip Antenna With Conical Radiation Pattern

Yu¹,

Wan²,

Zhang³

2017

PIER C

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Abstract-A low-profile wideband circularly polarized (CP) microstrip antenna with conical radiation patterns is designed in this paper. Based on the center-fed circular microstrip patch structure, the proposed antenna symmetrically employs 5 shorting vias connecting the patch and the ground plane to provide the θ-polarization and 11 slant sector branches at the edge of circular patch to generate the φ-polarization. With the phase difference of 90 • between the two orthogonal polarizations, the design radiates right-handed circularly polarized (RHCP) waves. The proposed antenna works at three resonant modes. To realize broad operating bandwidth, the slant sector branches should be carefully adjusted to make the second resonant mode couple the first mode (TM 01 mode) and third mode (TM 02 mode) together. The measured results show that the proposed antenna has a low profile of 0.025λ, impedance bandwidth of 35. , and axial ratio (AR) bandwidth of 38% (3.7-5.45 GHz). To further verify the characteristics of the proposed antenna, the studies on several important parameters are carried out by HFSS simulation, and a simple design guideline is provided.

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“…As a result various circularly polarized antennas with Omni directional radiation patterns have been proposed and investigated over the past few years. Due to a number of attractive features like light weight, small size, wide bandwidth, and low losses an Omni directional CP dielectric resonator antenna with inclined slots was presented in [1]. Two orthogonal components with different velocities produced by perturbation of the slot.…”

Section: Introductionmentioning

confidence: 99%

Low Profile Omni directional Circularly Polarized Patch Antenna for WLAN Applications

Reddy¹

2015

IJIRCCE

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ABSTRACT-Circularly polarized (CP) antennas are widely used in modern wireless communication systems because of their immunity to multipath distortion and polarization mismatch losses. On the other hand, unidirectional radiation patterns are generally desirable since they can provide larger signal coverage and stabilize the signal transmission. As a result various Omni directional CP antennas have been proposed and investigated over the past few years. The design utilizes two monopole modes of a circular patch which connects to a modified ground plane by a set of conductive pins, to achieve wide-band impedance matching. The curved branches introduced at the edge of circular ground plane excite a degenerate mode and create CP fields. To verify the design, a prototype should be fabricated operating at 2.4GHz-WLAN band and measured reflection coefficient, radiation pattern, and antenna gain should agree well with simulation results. In this paper simulation carried out using arlonAD320A instead of RogersRT/duroid 5880 because cost of Rogers material is very expensive. But losses in arlon material are more. The losses are reduced by decreasing number of shorting pins and increase the radius of shorting pins. The prototype as a low profile 0.024 0 , a return loss value30dB and a antenna gain of 4.68dB. To further characterize the design concept, a parametric study of the antenna is carried out using HFSS.

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Omnidirectional Linearly and Circularly Polarized Rectangular Dielectric Resonator Antennas

Cited by 120 publications

References 19 publications

Dual-Band Omnidirectional Circularly Polarized Patch Antenna With Etched Slots and Shorting Vias

Dual-Band Omnidirectional Circularly Polarized Patch Antenna With Etched Slots and Shorting Vias

Low-Profile Wideband Circularly Polarized Microstrip Antenna With Conical Radiation Pattern

Low Profile Omni directional Circularly Polarized Patch Antenna for WLAN Applications

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