A New Triple Band Circularly Polarized Square Slot Antenna Design With Crooked T and F-Shape Strips for Wireless Applications

Rezaeieh, Sasan Ahdi; Kartal, Mesut

doi:10.2528/pier11081506

Cited by 60 publications

(43 citation statements)

References 29 publications

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“…Because of the advantages of low profile, design simplicity and robustness, many CP antennas are designed with slots [1][2][3][4][5][6][7][8][9][10][11][12][13]. 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].…”

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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“…This topology is expected to be very suitable in view of the specific features needed for the patch current amplitude and phase distributions: when the E-vector of the excitation field is parallel to the slotted side of the patch, the radiation field has predominantly a linear polarization. It is worth mentioning that, to the knowledge of the authors, no slotted strip-frame patches of this kind have ever been used in printed planar or cylindrical antennas [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37]. It is clearly shown in this paper that slotted strip-frame patches are effective for cylindrical microstrip antenna arrays (CMAAs) fed by a cylindrical microstrip line.…”

Section: Introductionmentioning

confidence: 97%

Cylindrical Microstrip Array Antennas With Slotted Strip-Framed Patches

Svezhentsev¹,

Kryzhanovskiy²,

Vandenbosch³

2013

PIER

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Abstract-A cylindrical microstrip array antenna with 5 pairs of coupled slotted strip framed patches is analyzed. The patches are proximity-fed by a cylindrical microstrip line. In order to extract the reflection coefficient from the standing wave pattern on the microstrip line, its length is about 5 wavelengths. To the best of the authors' knowledge proximity-fed cylindrical arrays have not been analyzed before using a rigorous MOM model that takes into account all electromagnetic couplings between patches and feeding line. The paper consists of three parts. The first part describes a plane wave excitation of the cylindrical microstrip structure. It introduces some innovating theoretical developments, like the improvement of the asymptote for the spectral Green's function and the explicit surface wave contribution. The second part calculates the radar cross section of the cylindrical microstrip structure with single and coupled slotted strip framed patches. The resonant frequencies, and the amplitude and phase of the current distribution are analysed. The third part describes a design for a proximity-fed array of 5 coupled slotted strip framed patches. It gives the reflection coefficient, current distribution on the patches, and radiation pattern. A very low level of cross polarization (< −40 dB) is achieved. It is shown that the resonant frequencies of the cylindrical array and its planar analogue lie very close to each other. This is due to the common nature of the low frequency slot resonance for the slotted strip framed patch.

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“…Radiation from slots and seams is of greater concern as the speed of the electronic designs increases [9][10][11][12][13][14][15][16][17]. Thin-slot formalism permits inclusion of conducting plates with arbitrarily narrow apertures or gaps without requiring any corresponding need to reduce the cell size to the gap width or depth for the FDTD analysis.…”

Section: Introductionmentioning

confidence: 99%

A Simple Local Approximation FDTD Model of Short Apertures With a Finite Thickness

Xiong¹,

Chen²,

Mao³

et al. 2012

PIER

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Abstract-This paper brings forward a simple local approximation finite-difference time-domain (FDTD) method for the analysis of short apertures with a finite thickness. By applying the equivalence principle together with a simple local approximation, the varying field distribution is accurately derived. The updating equations for the slot field can be derived by casting the field distributions into the contour paths containing the apertures. The method has been applied to two problems and the results are compared with the high-resolution standard FDTD simulation results and the measurement results. The accuracy of the proposed method is verified from the comparison of both the field distribution and the time-domain and frequency-domain slot coupling results. It is demonstrated that the local approximation is highly efficient and timesaving, and the present method is stable, numerically and computationally efficient.

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A New Triple Band Circularly Polarized Square Slot Antenna Design With Crooked T and F-Shape Strips for Wireless Applications

Cited by 60 publications

References 29 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

Cylindrical Microstrip Array Antennas With Slotted Strip-Framed Patches

A Simple Local Approximation FDTD Model of Short Apertures With a Finite Thickness

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