A Coplanar Waveguide Fed Two Arm Archimedean Spiral Slot Antenna With Improved Bandwidth

Mashaal, Omar; Rahim, Sharul Kamal Abdul; Abdulrahman, A. Y.; Sabran, M. I.; Rani, M. S. A.; Hall, Peter

doi:10.1109/tap.2012.2224831

Cited by 49 publications

(38 citation statements)

References 10 publications

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“…Slotrings [3][4][5][6], square slot [7][8][9][10][11], and U-shaped slot [12,13] are effective methods to achieve circular polarization. In order to simplify the feeding structure and save space, a coplanar waveguide (CPW) approach is adopted in CP antennas [14][15][16][17][18][19][20][21]. In [14,15], CP antennas with tuning rectangular slot fed by CPW are discussed.…”

Section: Introductionmentioning

confidence: 99%

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

Chen¹,

Ren²,

Yin³

et al. 2013

PIER Letters

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Abstract-A coplanar waveguide-fed slot antenna with wideband circular polarization characteristic is presented. The proposed antenna consists of an irregular slot with a stair-shaped edge and an L-shaped feed line. The stair-shaped edge can improve the circular polarization of the antenna. The simulated and measured results show that the antenna has an impedance bandwidth (VSWR < 2) about 1040 MHz (42%@2.47 GHz) and an axial ratio (AR) bandwidth (AR < 3 dB) about 640 MHz (25.8%@2.48 GHz) for 2.45 GHz RFID applications. The RHCP gain in the main radiation direction varies between 2.3 dBi and 3.8 dBi.

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Section: Introductionmentioning

confidence: 99%

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

Chen¹,

Ren²,

Yin³

et al. 2013

PIER Letters

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show abstract

“…Within this family of antennas, some topological choices permit to satisfy the circular polarization constraint, too: as the cases of standard Archimedean [19] and logarithmic spiral [17] topologies, both providing a balanced port, or a tapered version of the Archimedean spiral with unbalanced port [20].…”

Section: Hybrid Uwb-uhf Antenna Designmentioning

confidence: 99%

A Novel Integrated UWB–UHF One-Port Antenna for Localization and Energy Harvesting

Fantuzzi

Masotti

Costanzo

2015

IEEE Trans. Antennas Propagat.

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In this work a novel compact, single-port antenna combining both UWB and UHF bands is presented. This solution is proposed for next generation passive RFID tags, performing communication and localization through UWB technology and efficient energy harvesting in the UHF band, but it is also designed in order to keep compatibility with previous tags generations. The UWB communication is deployed by means of an Archimedean spiral topology, while energy harvesting at UHF is obtained by suitably extending the spiral outer arms, thus realizing a meandered dipole, without affecting the UWB behavior. The single-port architecture provides an overall size reduction, while preserving the radiation performance in both the operating bands. This solution allows a direct connection to future integrated UWB-UHF chips, to standard RFID chips, or to a diplexer for suitably combining the UWB and the UHF functionalities. A prototype of this new antenna, realized on a standard FR-4 substrate, is first presented to validate the proposed novel design. As a second step, the same architecture is scaled on a paper substrate in view of its fully eco-compatible realization to be exploited by future pervasive RFID applications. The compact design of the antenna feeding network in discrete technology is also presented.Index Terms-Ultra wideband antennas, UHF antennas, rectennas, radiofrequency energy harvesting, radiofrequency identification.

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“…To overcome these drawbacks, designers have occasionally used coplanar waveguide (CPW) to feed these antennas to benefit from its attractive properties in terms of easy integration with active and passive devices, low‐frequency dispersion, and simple feeding mechanism . However, even with CPW feeds, baluns have been frequently used mainly to convert an unbalanced CPW line to a balanced 2 arm spiral . This has the effect of complicating the design, increasing the size, and reducing the bandwidth …”

Section: Introductionmentioning

confidence: 99%

UWB coplanar waveguide-fed coplanar strips rectangular spiral antenna

Omar

Safia

Nedil

2017

Int J RF Microw Comput Aided Eng

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This article proposes an ultra‐wideband coplanar strips (CPS) rectangular spiral antenna that is fed by coplanar waveguide (CPW). The CPS is formed by gradually reducing the width of the CPW ground planes without the need of a balun. The antenna operates in the frequency band (3.5‐10.6 GHz) and has miniaturized size of 50 × 40 × 0.508 mm on a Rogers RO4003C substrate. The CPS spiral is terminated with a 100 Ω chip resistor for matching. A parametric study was performed to choose the CPS spiral dimensions. A good agreement is found between simulations and measurements in the radiation pattern and the return loss which was found to be better than 10 dB over the band. The measured peak gain ranges between 1 and 4.7 dBi.

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A Coplanar Waveguide Fed Two Arm Archimedean Spiral Slot Antenna With Improved Bandwidth

Cited by 49 publications

References 10 publications

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

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

A Novel Integrated UWB–UHF One-Port Antenna for Localization and Energy Harvesting

UWB coplanar waveguide-fed coplanar strips rectangular spiral antenna

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