A Simple-Topology Compact Broadband Circularly Polarized Antenna With Unidirectional Radiation Pattern

Ullah, Ubaid; Koziel, Slawomir; Mabrouk, Ismail Ben

doi:10.1109/lawp.2019.2945543

Cited by 14 publications

(12 citation statements)

References 23 publications

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“…References 15–17, 20 have the maximum gain as compared to proposed antenna but having the larger antenna size and lower bandwidths as well. Moreover, References 17, 19, 30 have the higher antenna profile.…”

Section: Resultsmentioning

confidence: 80%

A compact multi‐slots loaded gap coupled CP antenna with DGS for WLAN/WiMAX applications

Verma

Kanaujia

Saini

et al. 2020

Int J RF Microw Comput Aided Eng

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In this article a novel compact circularly polarized slotted gap coupled semi-circular patch antenna is presented for WLAN and WiMAX applications. The prototype of the designed antenna is fabricated with an area of 42.5 × 42.5 mm 2. The circular polarization (CP) radiation is obtained by introducing a square ring slot defect in the ground plane whereas wide impedance bandwidth is achieved by gap coupled semi-circular patches with L-shaped slots. In order to improve the antenna bandwidth with better impedance matching an inclined slot is etched from the center of the patches. Further, to understand the effect of slots on antenna characteristics a parametric study is conducted. The measured impedance bandwidth (jS 11 j ≤ −10 dB) and axial ratio bandwidth for AR ≤ 3 dB of the proposed antenna are 83.08% (5.15-12.47 GHz) and 34.29% (4.30-6.08 GHz), respectively. The gain of the antenna is > 4 dBi within the CP band. The measured and simulated results are well accepted.

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Section: Resultsmentioning

confidence: 80%

A compact multi‐slots loaded gap coupled CP antenna with DGS for WLAN/WiMAX applications

Verma

Kanaujia

Saini

et al. 2020

Int J RF Microw Comput Aided Eng

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“…Size (mm 3 ) −10 dB IBW 3 dB ARBW [11] 25 × 24.7 × 0.813 42.6% 42% [12] 28 × 28 × 1.4 60.1% 54.5% [13] 38.8 × 38.8 × 0.8 87.8% 96% [17] 45 × 45 × 1.575 100.5% 61.5% [18] 37.6 × 33.5 × 0.813 82% 80% [19] 60…”

Section: Experimental Verificationmentioning

confidence: 99%

“…A metal strip that is orthogonal to the microstrip feedline is protruded on the right side of the slot to generate two equal amplitude orthogonal currents [4]. Slots and radiation patches with special shapes are also utilized to obtain multiple circularly polarized modes and broaden the ARBW [7][8][9][10][11][12][13][14][15][16][17][18]. In [7], CP characteristic is achieved under the introduction of open slot, but the narrow ARBW limits its application in multi communication systems.…”

Section: Introductionmentioning

confidence: 99%

Design and Optimization of CPW-Fed Broadband Circularly Polarized Antenna for Multiple Communication Systems

Fu¹,

Feng²,

Chen³

2021

PIER Letters

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A novel coplanar waveguide (CPW) fed wide slot antenna for broadband circular polarization (CP) operation is proposed in this letter. Utilizing an asymmetrical ground plane and an open slot, broadband axial ratio and good impedance characteristics can be obtained in the middle and low bands. The perturbation patch on the right side of the wide slot excites the upper-band CP mode. By adjusting the upper-part feedline and the wide slot structure, the axial ratio performance can be optimized to a wideband axial ratio bandwidth (ARBW). Compared with wide slot antennas of similar size, the proposed antenna has a simpler structure while achieving a wider ARBW. The proposed antenna has been fabricated and tested. The measured results show that the −10 dB impedance bandwidth (ZBW) is 2.40-7.55 GHz (103.5%); 3-dB ARBW is 2.47-6.2 GHz (86.0%); and the peak gain is about 4 dBic. Right-hand circular polarization (RHCP) radiation pattern is achieved in +z direction. The proposed antenna can be used in WLAN/WiMAX applications and various wireless communication systems which require broadband ZBW and ARBW.

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“…In addition, a meandered slot structure is used on the ground plane and three Y-shaped slots and one rectangular slot are cut on the Y-shaped patch to generate multiple resonances at low frequency region and thus the bandwidth is enhanced [4]. Modified ground structures (either by cutting slots or by loading with different shapes) [5][6][7][8][9][10][11] are also applied to get low profile antennas. A protuberant ground plane with half slot structure is applied to get low frequency resonance [5].…”

Section: Introductionmentioning

confidence: 99%

“…And according to the tapered slot principle, this triangular slot also gives wideband property [9]. In addition, in a coplanar waveguide fed antenna two open slots are cut on the coplanar ground plane from the left side of the transmission line to attain compact and wideband properties [10]. In [11], a wide slot is cut on the ground plane and then a horizontal stub is protruded from the right edge of the slot toward the center of the defected ground plane to achieve compact and wideband properties.…”

Section: Introductionmentioning

confidence: 99%

Metamaterial-Based Compact Antenna with Defected Ground Structure for 5G and Beyond

Rahman¹,

Islam²,

Islam³

et al. 2022

Computers, Materials &Amp; Continua

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In this paper, a unit cell of a single-negative metamaterial structure loaded with a meander line and defected ground structure (DGS) is investigated as the principle radiating element of an antenna. The unit cell antenna causes even or odd mode resonances similar to the unit cell structure depending on the orientation of the microstrip feed used to excite the unit cell. However, the orientation which gives low-frequency resonance is considered here. The unit cell antenna is then loaded with a meander line which is parallel to the split bearing side and connects the other two sides orthogonal to the split bearing side. This modified structure excites another mode of resonance at high frequency when a meander line defect is loaded on the metallic ground plane. Specific parameters of the meander line structure, the DGS shape, and the unit cell are optimized to place these two resonances at different frequencies with proper frequency intervals to enhance the bandwidth. Finally, the feed is placed in an offset position for better impedance matching without affecting the bandwidth The compact dimension of the antenna is 0.25 λL × 0.23 λL × 0.02 λL, where λL is the free space wavelength with respect to the center frequency of the impedance bandwidth. The proposed antenna is fabricated and measured. Experimental results reveal that the modified design gives monopole like radiation patterns which achieves a fractional operating bandwidth of 26.6%, from 3.26 to 4.26 GHz for |S11|<−10 dB and a pick gain of 1.26 dBi is realized. In addition, the simulated and measured crosspolarization levels are both less than −15 dB in the horizontal plane.

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A Simple-Topology Compact Broadband Circularly Polarized Antenna With Unidirectional Radiation Pattern

Cited by 14 publications

References 23 publications

A compact multi‐slots loaded gap coupled CP antenna with DGS for WLAN/WiMAX applications

A compact multi‐slots loaded gap coupled CP antenna with DGS for WLAN/WiMAX applications

Design and Optimization of CPW-Fed Broadband Circularly Polarized Antenna for Multiple Communication Systems

Metamaterial-Based Compact Antenna with Defected Ground Structure for 5G and Beyond

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