A corner expanded slot antenna loaded with copper strips for dual‐band circular polarization characteristics

Paul, Princy Maria; Kandasamy, Krishnamoorthy; Sharawi, Mohammad S.

doi:10.1002/mop.32044

Cited by 8 publications

(7 citation statements)

References 13 publications

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“…4) to attain phase difference of approximately π/2 between the orthogonal modes resulting in improvement of AR values significantly below 3 dB. It is worth mentioning that the design of the 45 0 inclined microstrip line is made such that the use of a single such structure is enough to bring down the axial ratio (AR) below 3 dB at three frequencies whereas in conventional designs, multiple inclined microstrip structures will be required for this function 8,18 . In order to comprehend the effect of the structure modification, Table 1 is presented.…”

Section: Antenna Geometrymentioning

confidence: 99%

A wideband compact antenna with quad‐circular polarized bands in its operating regions

Ghosh¹,

Islam

Das

2020

Int J RF Microw Comput Aided Eng

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This article presents the design of an offset CPW-fed slot antenna which exhibits a narrow impedance bandwidth (IBW; |S 11 | ≤ −10 dB) extending from 1.20 GHz to 1.45 GHz and another wide impedance bandwidth from 1.86 GHz to 8.4 GHz thus covering almost all the conventional operating frequencies. The antenna is loaded with semicircular and rectangular stubs and meandered microstrip lines to realize circular polarization at 1.35 GHz, 3.3 GHz, 4.9 GHz, and 7.5 GHz with axial ratio bandwidth (axial ratio ≤ 3 dB) of 19.25% (1.2-1.46 GHz), 4.24% (3.24-3.38 GHz), 4.1%(4.8-5 GHz), and 5.2% (7.3-7.69 GHz) respectively thus covering the GPS, WiMAX, WLAN, and Xband downlink satellite communication application bands. The mechanism of generation of CP is discussed using vector analysis of surface current density distribution. The gain is fairly constant in the wide IBW region with maximum fluctuation of 1.2 dB. The structure is compact with an overall layout area of 0.27λ × 0.27λ, where λ is the free-space wavelength corresponding to the lowest circular polarized (CP) frequency. A comparison of the proposed antenna with previously reported structures is performed with respect to impedance bandwidth, compactness, number of CP bands, LHCP to RHCP isolation and gain to comprehend the novelty of the proposed design. A prototype of the proposed antenna is fabricated and the measured results are in accord with the simulated results.

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Section: Antenna Geometrymentioning

confidence: 99%

A wideband compact antenna with quad‐circular polarized bands in its operating regions

Ghosh¹,

Islam

Das

2020

Int J RF Microw Comput Aided Eng

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“…The antennas were loaded with the split-ring resonator (SRR) for obtaining multiple CP bands [16][17][18]. A dualband slot antenna was presented with extended corners and an array of inclined strips [19]. A coplanar waveguide (CPW)-fed broadband CP antenna was developed in [20], where rectangular, L-, and spiral slots were embedded in the antenna for circular polarization.…”

Section: Introductionmentioning

confidence: 99%

“…The antenna sizes were relatively larger in [5, 8, 12, 15,18,20], therefore occupy more space, and this may also limit their integration with modern portable devices. The radiator designs in [19][20][21] were complex as they required an array of inclined strips and symmetric/asymmetric slots.…”

Section: Introductionmentioning

confidence: 99%

Quad-Band multi-polarized antenna with modified electric-inductive−capacitive resonator

Singh

Kanaujia

Pandey

et al. 2021

Int. J. Microw. Wireless Technol.

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A compact circularly polarized (CP) patch antenna is presented for modern communication systems. The prospective antenna consists of a microstrip-line inset-fed rectangular patch and a defected ground plane. A rotated rectangular slot and a modified electric-inductive-capacitive (m-ELC) resonator are introduced in the patch and the ground plane to achieve multiband behaviour. A corner of the radiating patch is truncated and an arrow-shaped stub is introduced for generating circular polarization. The physical area of the substrate is 0.26λ0 × 0.22λ0, and the radiator size is 0.16λ0 × 0.14λ0, where λ0 is the free-space wavelength estimated at the lowest frequency. The measured (S11≤-10 dB) bandwidths of the antenna are 80 MHz (3.58%) at 2.23 GHz, 75 MHz (2.64%) at 2.84 GHz, 80 MHz (2.50%) at 3.19 GHz, and 70 MHz (1.82%) at 3.83 GHz. The measured 3-dB axial ratio bandwidths are 40 MHz (1.41%), 100 MHz (3.12%), and 60 MHz (1.57%) at 2.84, 3.20 and 3.82 GHz, respectively. The proposed planar antenna design does not need dual-feed or multi-layered patches for achieving multiple CP bands. It offers easy integration with the printed circuits of the communication systems.

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“…Miniaturized dual‐band and bandwidth enhancement single‐layer single‐feed microstrip patch antenna has described and demonstrated for WLAN application in Reference . Circularly polarized dual‐band and tri‐band slot antennas are addressed in References [24] and [25] and for UWB application dispersion engineered transmission line loaded slot antenna is presented in Reference .…”

Section: Introductionmentioning

confidence: 99%

Miniaturized dual‐band slot antenna design for GPS, amateur radio and WLAN applications

Haque

Alam

2020

Int J RF Microw Comput Aided Eng

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In this article, miniaturization of dual‐band slot antenna design for GPS, WLAN and amateur radio applications is presented. The proposed dual‐band miniaturized antenna is achieved using slits, rectangular split ring and metallic strips fed by 50 Ω microstrip feed. The first resonant frequency is achieved by loading reference antenna with eight slits that is antenna 1 and the second resonant frequency is achieved by loading with one center slits and rectangular split ring that is antenna 2. Dual‐band antenna is achieved by loading reference slot antenna with nine slits and rectangular split ring which resonates at frequency of 1.52 and 3.03 GHz respectively. As a result, it is achieved 53.79% reduction in first band resonant frequency with 76.07% improvement in −10 dB bandwidth and 7.90% reduction in second band resonant frequency compared to reference slot antenna. Further, this dual‐band antenna is miniaturized by metallic strips which are placed on the bottom of the substrate. This results in 61.39% reduction in first band resonant frequency with 32.07% improvement in −10 dB bandwidth and 26.13% reduction in second band resonant frequency in comparison with reference slot antenna topology.

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A corner expanded slot antenna loaded with copper strips for dual‐band circular polarization characteristics

Cited by 8 publications

References 13 publications

A wideband compact antenna with quad‐circular polarized bands in its operating regions

A wideband compact antenna with quad‐circular polarized bands in its operating regions

Quad-Band multi-polarized antenna with modified electric-inductive−capacitive resonator

Miniaturized dual‐band slot antenna design for GPS, amateur radio and WLAN applications

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