Serial Aperture-Coupled Dual Band Circularly Polarized Antenna

Chang, The-Nan; Lin, Jyun-Ming

doi:10.1109/tap.2011.2144553

Cited by 39 publications

(31 citation statements)

References 11 publications

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“…It is observed that the proposed antenna provides symmetrical radiation patterns in both planes at 0.92 and 2.45 GHz bands, which is required for unidirectional RFID application because the maximum radiation direction should be consistent with the boresight direction and must not shift to different directions for different bands. From the results presented in [10], [11], and [13], those antennas are incapable of achieving this requirement. Seen from Figs.…”

Section: Simulation and Measurement Resultsmentioning

confidence: 99%

“…On the other hand, the radiating patch resonance occurring at the third harmonic frequency also deteriorates the performance. Instead of probe feed technique, a serial feed line which couples diamond-shaped slot to ring and cross-slot to patch is presented in [11]. This structure also can be operated as a dual-band CP antenna to cover both 0.92 and 2.45 GHz bands.…”

Section: Introductionmentioning

confidence: 99%

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Dual-Band Circularly-Polarized Unidirectional Patch Antenna for RFID Reader Applications

Liu

Shen

Liu

et al. 2014

IEEE Trans. Antennas Propagat.

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A dual-band 0.92/2.45 GHz circularly-polarized (CP) unidirectional antenna using the wideband dual-feed network, two orthogonally positioned asymmetric H-shape slots, and two stacked concentric annular-ring patches is proposed for RF identification (RFID) applications. The measurement result shows that the antenna achieves the impedance bandwidths of 15.4% and 41.9%, the 3-dB axial-ratio (AR) bandwidths of 4.3% and 21.5%, and peak gains of 7.2 dBic and 8.2 dBic at 0.92 and 2.45 GHz bands, respectively. Moreover, the antenna provides stable symmetrical radiation patterns and wide-angle 3-dB AR beamwidths in both lower and higher bands for unidirectional wide-coverage RFID reader applications. Above all, the dual-band CP unidirectional patch antenna presented is beneficial to dual-band RFID system on configuration, implementation, as well as cost reduction.Index Terms-Dual-band, circularly-polarized (CP), patch antenna, RF identification (RFID), axial-ratio (AR).

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Section: Simulation and Measurement Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dual-Band Circularly-Polarized Unidirectional Patch Antenna for RFID Reader Applications

Liu

Shen

Liu

et al. 2014

IEEE Trans. Antennas Propagat.

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“…They can realize CP feature well, while these feeding networks are complicated. The aperture coupling antenna realizes circular polarization by coupling the two orthogonal slots through a feeding network with a phase difference of ±90 • and radiates energy through the radiation patch located on the upper layer [8,9]. This stacked structure is not suitable for compact antenna, especially for some handheld reader devices.…”

Section: Introductionmentioning

confidence: 99%

First-Order Minkowski Fractal Circularly Polarized Slot Loop Antenna With Simple Feeding Network for Uhf Rfid Reader

Yang¹,

Feng²,

Zheng³

2018

PIER Letters

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Abstract-A circularly polarized (CP) antenna with simple feeding network for ultra-high-frequency (UHF) radio-frequency identification (RFID) reader application is presented in this letter. The proposed antenna consists of a slot loop etched on the ground and a simple feeding network using bended microstrip lines. And the two parts of the antenna are printed on either sides of a thin substrate, thus a low-profile antenna is obtained. The slot loop is meandered based on the first-order Minkowski fractal technique for antenna size reduction. To generate circularly polarized radiation, two branches of the feeding network are designed to be orthorhombic with 90 • phase difference. The antenna is simulated and practically fabricated with a compact size of 80 × 80 × 1.6 mm 3 . The 10-dB impedance bandwidth and 3-dB axial-ratio (AR) bandwidth are measured to be 50 MHz (0.896-0.946 GHz) and 12 MHz (0.916-0.928 GHz), respectively. The measured peak gain exhibits stable value of 3 dBi over the impedance bandwidth. Furthermore, a wide 3-dB beamwidth of 120 • is achieved for the proposed antenna. Based on the above, this antenna is well suited for applications in UHF RFID handheld readers.

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“…In many practical applications, the systems are desired to operate in two distinct frequencies efficiently [1] and a variety of dual-band microstrip antennas have been designed to satisfy the requirement [2][3][4]. Nevertheless, the dual-band microstrip antennas often suffer from low gain and poor directivity.…”

Section: Introductionmentioning

confidence: 99%

Miniaturized Dual-Band Aperture Coupled Microstrip Antenna Using Corrugated Ground

Qin²,

He³

2016

RADIOENGINEERING

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Serial Aperture-Coupled Dual Band Circularly Polarized Antenna

Cited by 39 publications

References 11 publications

Dual-Band Circularly-Polarized Unidirectional Patch Antenna for RFID Reader Applications

Dual-Band Circularly-Polarized Unidirectional Patch Antenna for RFID Reader Applications

First-Order Minkowski Fractal Circularly Polarized Slot Loop Antenna With Simple Feeding Network for Uhf Rfid Reader

Miniaturized Dual-Band Aperture Coupled Microstrip Antenna Using Corrugated Ground

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