The design of a squarer-ring slot antenna for circular polarization

Row, Jeen‐Sheen

doi:10.1109/tap.2005.848482

Cited by 146 publications

(96 citation statements)

References 10 publications

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“…Recently, numerous compact and low-profile microstrip CP antennas have been proposed. Perturbation technique, such as loading with extra stub [1], truncating corners [2], etching slots on the patch [3], and series feed coupling [4], is generally used. Meanwhile, to broaden the axial ratio bandwidth, multiple substrate layers have been applied [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Compact Coaxial Probe-Fed Cp Substrate Integrated Waveguide Cavity-Backed Antenna Utilizing Slot Split Ring

Huang¹,

Qiu²,

Jiang³

et al. 2016

PIER Letters

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Abstract-A circularly polarized (CP) substrate integrated waveguide (SIW) cavity-backed slot antenna is proposed. A slot split ring (SSR) etched on the top metal surface of an SIW resonator is employed to generate the right-handed circularly polarized (RHCP) wave. The proposed antenna is excited directly by a coaxial probe with a proper distance from the symmetric axis of the SSR resonator. A prototype of the proposed CP antenna at the center frequency of 10 GHz is manufactured. As a result, the proposed antenna exhibits the advantages of both conventional planar antennas and metallic cavity backed antennas, including simple structure, compact size of 15.8×15.8 mm 2 , light weight, easy fabrication, high gain and wide axial ratio bandwidth. It is proved by experiment that an impedance bandwidth of 10.2% for the reflection coefficient less than −10 dB, an axial ratio (AR) bandwidth of 1.72% for AR less than 3 dB, and a RHCP gain 5.5 dBi have been obtained.

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Section: Introductionmentioning

confidence: 99%

Compact Coaxial Probe-Fed Cp Substrate Integrated Waveguide Cavity-Backed Antenna Utilizing Slot Split Ring

Huang¹,

Qiu²,

Jiang³

et al. 2016

PIER Letters

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show abstract

“…Additionally, CP radiation can also be achieved by using an Lshaped feeding strip when no perturbations are added to slots [8][9][10]. Though wide AR bandwidths of 40% [8], 2.6% [9] and 6% [10] are obtained, the capacitance value between the bent strip and ground is very critical to obtain a low axial ratio and good impedance matching [8].…”

Section: Introductionmentioning

confidence: 99%

“…Though wide AR bandwidths of 40% [8], 2.6% [9] and 6% [10] are obtained, the capacitance value between the bent strip and ground is very critical to obtain a low axial ratio and good impedance matching [8]. In literature [11], a pair of hat-shaped patches is added to the ring slot for CP and the bent feeding line is deformed for impedance matching.…”

Section: Introductionmentioning

confidence: 99%

Modified Square Slot Antennas for Broadband Circular Polarization

Wu¹,

Ren²,

Li³

et al. 2013

PIER C

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Abstract-Square slot antennas with modified edges for broadband circular polarization are presented. Slots with only stubs or notches are studied and it is found that the axial ratio (AR) bandwidth is quite sensitive to the perturbations of the stubs and notches. To further enhance the AR bandwidth, slot antennas with combination of stubs and notches are proposed and wide 3-dB AR bandwidth of 15.5% (2.45-2.86 GHz) is obtained. By placing a conducting reflector at the rear of the slot, another modified square slot antenna is designed for practical applications, which achieves a 3-dB AR bandwidth of 6.5% (2.38-2.54 GHz) and peak gain of 8.7 dBic. Agreement between simulated and measured results is satisfactory.

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“…As we know, the coupling feed technique including slot coupling [29][30][31][32][33] and L-shaped strip coupling [34][35][36][37][38] has wide bandwidths. However, the aperture coupled patch antenna needs a reflecting plate to block back radiation, which increases the complexity of the antenna configuration.…”

Section: Introductionmentioning

confidence: 99%

Wideband Circularly Polarized Uhf Rfid Reader Antenna With High Gain and Wide Axial Ratio Beamwidths

Wang¹,

Li²,

Yang³

et al. 2012

PIER

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Abstract-A broadband circularly polarized patch antenna with high gain and wide axial ratio beamwidths is proposed for ultra-highfrequency (UHF) RF identification (RFID) applications in this paper. The antenna is composed of a square patch, a feed network printed on the bottom side of the substrates and an antenna radome. The CP radiation of the proposed antenna is excited by four cylinder probes which transmit four signals that have equal amplitude with quadrature phase difference (0 • , 90 • , 180 • , and 270 • ) generated from the feed network. To obtain an optimum peak gain and a broad CP bandwidth, 100 Ω isolation resistor is omitted in the feed network for obtaining high radiation efficiency, and the effects of varying the feed positions and dimensions of the various parameters on the antenna performances are respectively investigated. Simulation results are compared with the measurements, and a good agreement is obtained. The measured results show that the proposed antenna can provide broad impendence bandwidth of 19.7% (815-993 MHz) (reflection coefficient less than −15 dB), a maximum gain of 9.65 dBi, and a 3-dB axial ratio (AR) bandwidth of about 11% (860-960 MHz). The results indicate that the proposed antenna is an excellent candidate for UHF RFID reader system. At last, read performance of the proposed antenna array in RFID systems is presented, which verify the superior features of the proposed antenna in practical RFID system applications.

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The design of a squarer-ring slot antenna for circular polarization

Cited by 146 publications

References 10 publications

Compact Coaxial Probe-Fed Cp Substrate Integrated Waveguide Cavity-Backed Antenna Utilizing Slot Split Ring

Compact Coaxial Probe-Fed Cp Substrate Integrated Waveguide Cavity-Backed Antenna Utilizing Slot Split Ring

Modified Square Slot Antennas for Broadband Circular Polarization

Wideband Circularly Polarized Uhf Rfid Reader Antenna With High Gain and Wide Axial Ratio Beamwidths

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