A Wideband Circularly Polarized Conical-Beam Patch Antenna

Lau, K.L.; Luk, Kwai Man

doi:10.1109/tap.2006.874361

Cited by 67 publications

(55 citation statements)

References 7 publications

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“…This is because of the symmetric structure of the proposed antenna. The measured peak gains of the proposed antenna at three resonant frequencies are 3.2 dBic, 4.2 dBic, and 3.6 dBic, respectively, which are smaller than the gains of the wideband omnidirectional CP antennas in [1] and [4] for the smaller ground plane.…”

Section: Simulated and Measured Resultsmentioning

confidence: 76%

“…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%. 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].…”

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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Section: Simulated and Measured Resultsmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

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

Yu¹,

Wan²,

Zhang³

2017

PIER C

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“…In the designs of [1][2][3][4], the fed dipole/coaxial probe and loop/bended branches are utilized to generate vertically and horizontally polarized omnidirectional fields, respectively. Differently, each of the array elements in [5,6] is firstly designed to be a CP antenna. Then these CP array elements are arranged in a circular/square formation to achieve omnidirectional radiation.…”

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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“…Spiral antennas which have essentially frequency-independent radiation and impedance characteristics over bandwidth are the exemplary wideband CP antenna, but they are bulky and required to achieve the proper phase progression between adjacent spiral arms [21]. To design a low-profile and compact size, the stacked configurations [22][23][24][25][26][27][28][29] with a patch element are employed and the bandwidths are less than 30%. The broadband single-patch CP microstrip antennas with dual capacitively coupled feeds are proposed [30][31][32].…”

Section: Introductionmentioning

confidence: 99%

A Wideband Planar Monopole Antenna Array With Circular Polarized and Band-Notched Characteristics

Lee¹,

Oh²,

Yu³

2012

PIER

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Abstract-A wideband circular polarized planar monopole antenna array (PMAA) that employs dual band-notched characteristics is presented in this paper. The proposed antenna array is formed by four pinwheel-shaped folded planar monopole antennas (PMAs) in order to improve the performance of circular polarization and high directivity. Also, it achieves low-profile, small-sized structure. The attractive characteristics of the proposed PMAA are a wide impedance bandwidth of 87.3% (1 GHz to 2.55 GHz), the 3 dB axial-ratio (AR) bandwidth of 92.3% (1.05 GHz to 2.85 GHz) excluding dual notch bands, the total bandwidth of 35% (1.8 GHz to 2.55 GHz), and the maximum gain of 8.24 dBic within the total bandwidh. Moreover, in order to generate dual band-notched characteristics in a circular polarized antenna, a folded PMAA with multiple U radiators and inverted W slots is proposed.

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A Wideband Circularly Polarized Conical-Beam Patch Antenna

Cited by 67 publications

References 7 publications

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

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

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

A Wideband Planar Monopole Antenna Array With Circular Polarized and Band-Notched Characteristics

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