Broadband CPW-Fed Circularly Polarized Antenna With an Irregular Slot for 2.45 GHZ Rfid Reader

Chen, Lu; Ren, Xueshi; Yin, Yingzeng; Wang, Zedong

doi:10.2528/pierl13052020

Cited by 28 publications

(14 citation statements)

References 21 publications

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“…Semi-analytic techniques are used to solve electromagnetic problems giving some physical insight of the underlying principles [29][30][31][32]. It may be useful to assess the effect of the reactive load caused by broadside-coupling to the CPWTL on the Q-factor of the U-shaped CPWR.…”

Section: Semi-analytical Methods For Calculating the Coupling Q-factormentioning

confidence: 99%

High Q-Factor Bandstop Filter Based on CPW Resonator Broadside-Coupled to CPW Through-Line

Fahmy¹,

Farahat²,

Hussein³

et al. 2020

PIER B

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High Q-factor bandstop filter based on broadside-coupling between U-shaped coplanar waveguide (CPW) resonator and CPW through-line (CPWTL) is proposed in the present paper. The CPWTL is printed on the top layer of the dielectric substrate whereas the CPW resonator (CPWR) is printed on the bottom layer. Only over very narrow frequency band around the resonant frequency of the CPWR the microwave power flowing in the CPWTL is coupled to (absorbed by) the CPWR leading to a bandstop filter of very high Q-factor. A CPWR with side ground strips of finite width is shown to have much higher Q-factor than that of infinitely extending side ground planes. Owing to the lower profile of the CPW with finite-width, the radiation loss is reduced, and the structure has narrower frequency band for coupling, which results in much higher Q-factor than other published works. The dimensions of the CPWTL are optimized for impedance matching whereas the dimensions of the Ushaped CPWR are optimized to obtain the highest possible Q-factor. The effect of the loss tangent of the dielectric substrate material on the Q-factor is investigated. A prototype of the proposed filter is fabricated and experimentally studied for more understanding of the underlying physical principles of operation and for experimental investigation of the filter performance. The experimental measurements show good agreement with the corresponding simulation results.

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Section: Semi-analytical Methods For Calculating the Coupling Q-factormentioning

confidence: 99%

High Q-Factor Bandstop Filter Based on CPW Resonator Broadside-Coupled to CPW Through-Line

Fahmy¹,

Farahat²,

Hussein³

et al. 2020

PIER B

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“…Several designs of patch antennas with mended ground plane are also presented for large operated bandwidth [9][10][11][12][13][14]. Some papers are reported in the literature where various techniques are used to achieve better radiation pattern, UWB, and current distribution over the radiating elements such as a coplanar wave guide fed monopole antenna using defected substrate [15], rhombus strip bounded annular ring antenna derived by microstrip feedline using DGS [16], compact U shaped modified circular ground plane antenna [17], curved slot loaded rectangular patch monopole MPA [18], microstrip fed monopole antenna by using beveled technique in ground plane [19], round steps on the corner loaded rectangular MPA [20], a modified rectangular patch monopole MPA [21], symmetrical hexagonal radiator monopole antenna [24], asymmetrical U-shaped patch loaded with T-shaped strip monopole antenna [25], circularly polarized MPA with different feeds and radiating shapes [23,27,28] for bandwidth expansion. Additionally, the impacts of metallic and dielectric wedges are explored to improve radiation attributes [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

A Novel Microstrip Fed L-Shaped Arm Slot and Notch Loaded Rmpa With Mended Ground Plane for Bandwidth Improvement

Kumar¹,

Ansari²,

Saroj³

et al. 2019

PIER C

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In this paper a novel design of microstrip fed L-shaped arm slot and notch loaded RMPA (Rectangular Microstrip Patch Antenna) with mended ground plane for wide bandwidth is presented. The proposed prototype antenna is fabricated on an FR-4 (Fire retardant) substrate with dimension 30 × 30.8 mm 2 and 1.6 mm thickness. The proposed design is analyzed and simulated using high frequency structure simulator (HFSS) tool version 15. The analysed results are validated through fabrication and measurement results. The analyzed result shows 96.1% maximum radiation efficiency at 2.9 GHz whereas overall efficiency is more than 85% over the entire frequency range, and experiment achieves gain 8.4 dB at 7 GHz. The designed antenna achieves 119.39% impedance bandwidth with more than 5 dB gain over the operating frequency range of 2.41 GHz to 9.55 GHz. For better performance and analysis of proposed antenna, a parametric study has been carried out to analyze the effects of variations in the following-slot and notch dimensions loaded on the patch as well as variations in ground length. The designed antenna can be utilized for various applications incorporating Bluetooth, WLAN, Wi-Max, and UWB operation.

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“…A CP antenna is presented by using the zeroth-order resonance and modified Alford loop [11]. A CP antenna is presented in [12] with stair-shaped edge and L-shaped feed line.…”

Section: Introductionmentioning

confidence: 99%

A Circularly Polarized Circularly-Slotted-Patch Antenna With Two Asymmetrical Rectangular Truncations for Nanosatellite Antenna

Sitompul

Sumantyo

Kurniawan

et al. 2019

PIER C

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In this paper, a circularly polarized slot-patch antenna for nanosatellite is presented. The novel design of the circularly polarized wave conducted by two asymmetrical rectangular-truncation techniques implemented on a circularly-slotted-patch on the front side and a deformed-shifted-feedline on the back side of the substrate. The antenna is printed on substrates with the dielectric constant of 2.17 and thickness of 1.6 mm. The resonant frequency of the proposed antenna is set at 2.2 GHz with the minimum requirement of the axial ratio bandwidth (ARBW) of 300 MHz. The proposed antenna produces under 10 dB impedance bandwidth (IBW) 1.2765 GHz or equal to 58% (1.7235-3 GHz) with Left-Handed Circular Polarization (LHCP). The average antenna gain reaches 4.5 dBic at 2.2 GHz and the ARBW 327.5 MHz or about 14.88% (2.0275-2.355 GHz). This paper includes the description and presentation of the completed discussion.

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Broadband CPW-Fed Circularly Polarized Antenna With an Irregular Slot for 2.45 GHZ Rfid Reader

Cited by 28 publications

References 21 publications

High Q-Factor Bandstop Filter Based on CPW Resonator Broadside-Coupled to CPW Through-Line

High Q-Factor Bandstop Filter Based on CPW Resonator Broadside-Coupled to CPW Through-Line

A Novel Microstrip Fed L-Shaped Arm Slot and Notch Loaded Rmpa With Mended Ground Plane for Bandwidth Improvement

A Circularly Polarized Circularly-Slotted-Patch Antenna With Two Asymmetrical Rectangular Truncations for Nanosatellite Antenna

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