Asymmetric-Circular Shaped Slotted Microstrip Antennas for Circular Polarization and RFID Applications

Nasimuddin, Nasimuddin; Chen, Zhi Ning; Qing, Xianming

doi:10.1109/tap.2010.2078476

Cited by 254 publications

(132 citation statements)

References 10 publications

Supporting

Mentioning

132

Contrasting

Order By: Relevance

“…In addition, the proposed design does not utilize FR4 substrates, which are highly lossy and adversely affect the gain and efficiency of the antenna. Concerning the designs published in [7] and [8], even though they correspond to a single-layer and two-layer stacked patch design, respectively, they also involve use of FR4 substrates. Furthermore, the single-layer design in [7] exhibits a gain of 8.6 dBic, whereas the two-layer design in [8] is characterized by the lowest overall gain (7 dBic).…”

Section: Stacked-patch Antenna -Simulations and Measurements Resultsmentioning

confidence: 99%

“…As known, a single-fed circularly polarized single-patch antenna has the disadvantage to exhibit narrow impedance bandwidth and narrow axial-ratio bandwidth, which is often less than 2% [8,9]. One approach to enhance both types of bandwidth is through use of thick substrates [10], which tend to support strong surface waves, and consequently, diffraction by the edges of the ground plane resulting in strong back radiation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design of Wideband, Circularly Polarized Patch Antennas for Rfid Applications in the FCC/Etsi Uhf Bands

Nestoros¹,

Christou²,

Polycarpou³

2017

PIER C

View full text Add to dashboard Cite

Abstract-The primary objective of this paper is to design a high-gain, circularly polarized patch antenna suitable for Radio Frequency Identification (RFID) readers that operate in the FCC and ETSI bands . These designs will be used in a healthcare application to provide tag identification for thousands of medicines stored on shelves inside a pharmaceutical warehouse. Consequently, it is important that these antennas provide sufficient electromagnetic coverage and polarization diversity in order to boost tag readability and minimize item identification errors. The proposed RFID reader antenna design begins with a single patch with truncated corners on air substrate in order to help us understand the effect of various geometrical parameters on critical antenna figures of merit. A stub is introduced in order to improve the impedance matching characteristics of the antenna. The wideband characteristic of the design, for both impedance matching and axial ratio, is achieved by a second truncated-corner patch antenna positioned on top of the first one. An optimum design is achieved by changing the heights of the main and parasitic patches, the size of the truncated corners, and the probe position. The final antenna designs are verified by comparing measurement and simulation results.

show abstract

Section: Stacked-patch Antenna -Simulations and Measurements Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of Wideband, Circularly Polarized Patch Antennas for Rfid Applications in the FCC/Etsi Uhf Bands

Nestoros¹,

Christou²,

Polycarpou³

2017

PIER C

View full text Add to dashboard Cite

show abstract

“…[1,2]. RFID is a non-contact auto-identification technology used to identify either static or mobile objects by electromagnetic coupling in the space [3]. Compared with the contact recognition technology established on mechanical or optical connection, RFID has the advantages of faster transmission rate, longer readable range, better anti-interference ability, etc.…”

Section: Introductionmentioning

confidence: 99%

“…It is known that most of the RFID tag antennas are linearly polarized (LP), while CP reader antenna can receive tag information regardless of the tag antenna's polarization, thus CP characteristics can reduce the mismatch of the polarization between the tag and reader antennas. Therefore, the highperformance RFID reader antennas with the characteristics of compactness, low profile and especially circularly polarized feature are ever increasingly demanded in the practical RFID applications [3]. The general frequency band of UHF RFID system for global applications is 840-960 MHz, while different countries have different frequency divisions in the UHF band, such as 840.5-844.5 MHz and 920.5-924.5 MHz bands in China, 866-869 MHz and 920-925 MHz in Singapore, and 902-928 MHz in America [2].…”

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

View full text Add to dashboard Cite

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.

show abstract

“…Proper impedance matching can be achieved using appropriate feeding techniques and subsequently return loss will be reduced with the increase in the impedance bandwidth [4]. Compact patch antennas are proposed with enhanced bandwidth by tuning the slot dimensions [5]- [6]. Slots are etched on the diagonally on the patch and thereby enhancing bandwidth by 18MHz with bore sight gain of 3.3dB [7].…”

Section: Introductionmentioning

confidence: 99%

Design of High Gain, Bandwidth and Efficient Double Split Ring Slotted Antenna with Swastika Shape EBG Structures at 21.29GHz for High Data Rate Communications

Viswanadha¹,

S.²

2018

IJCA

View full text Add to dashboard Cite

Microstrip patch antennas are frequently used in many integrated circuits due to their compactness, planar nature and ease of integration. These antennas are modified according to the designer"s application and specifications. One such modified antenna is slotted antenna. Slotted antennas are usually used to enhance gain, bandwidth and low VSWR. Increasing slots on the patch will enhance bandwidth with the degradation of gain. The problem of surface waves also arises with the increment in slots. Many structures like Electromagnetic Bandgap Structures (EBG), Defective Ground Structures (DGS) are proposed in order to reduce the surface waves. This paper presents the detailed design of double split ring slotted patch antenna mounted on the swastika EBG structure at 21.29GHz. The proposed antenna is simulated using Advance Design System-2016. Gain and bandwidth of the proposed antenna are observed to be 11.92dB and 3.2GHz respectively.

show abstract

Asymmetric-Circular Shaped Slotted Microstrip Antennas for Circular Polarization and RFID Applications

Cited by 254 publications

References 10 publications

Design of Wideband, Circularly Polarized Patch Antennas for Rfid Applications in the FCC/Etsi Uhf Bands

Design of Wideband, Circularly Polarized Patch Antennas for Rfid Applications in the FCC/Etsi Uhf Bands

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

Design of High Gain, Bandwidth and Efficient Double Split Ring Slotted Antenna with Swastika Shape EBG Structures at 21.29GHz for High Data Rate Communications

Contact Info

Product

Resources

About