Resonant frequency of circular microstrip antenna covered with dielectric superstrate

Guha, Debatosh; Siddiqui, Jawad Y.

doi:10.1109/tap.2003.813620

Cited by 66 publications

(44 citation statements)

References 19 publications

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“…The reasons that both gain values of the two 3DIMAs are negative may be caused by the deviation of expected dielectric constant and dielectric loss tangent of the substrate. Additionally, the resin layer cover on the 3DIMAs may also affect the antenna gain property [22,23].…”

Section: Resultsmentioning

confidence: 99%

Effect of Weaving Direction of Conductive Yarns on Electromagnetic Performance of 3D Integrated Microstrip Antenna

Yao

Zhao

et al. 2013

Appl Compos Mater

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A three-dimensionally integrated microstrip antenna (3DIMA) is a microstrip antenna woven into the three-dimensional woven composite for load bearing while functioning as an antenna. In this study, the effect of weaving direction of conductive yarns on electromagnetic performance of 3DIMAs are investigated by designing, simulating and experimental testing of two microstrip antennas with different weaving directions of conductive yarns: one has the conductive yarns along the antenna feeding direction (3DIMA-Exp1) and the other has the conductive yarns perpendicular the antenna feeding direction (3DIMA-Exp2). The measured voltage standing wave ratio (VSWR) of 3DIMA-Exp1 was 1.4 at the resonant frequencies of 1.39 GHz; while that of 3DIMA-Exp2 was 1.2 at the resonant frequencies of 1.35 GHz. In addition, the measured radiation pattern of the 3DIMA-Exp1 has smaller back lobe and higher gain value than those of the 3DIMA-Exp2. This result indicates that the waving direction of conductive yarns may have a significant impact on electromagnetic performance of textile structural antennas.

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Section: Resultsmentioning

confidence: 99%

Effect of Weaving Direction of Conductive Yarns on Electromagnetic Performance of 3D Integrated Microstrip Antenna

Yao

Zhao

et al. 2013

Appl Compos Mater

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“…In the present study, FIS model is used to optimize different antenna parameters so as to obtain the lowest return loss in X-band. The Mamdani fuzzy interface system [19,20] is used for optimization purpose. The inputs to the FIS system are feed position, gap between the sectors and radius of the circular patch.…”

Section: Fuzzy Inference System (Fis Approach)mentioning

confidence: 99%

“…Several techniques are available in the literature to calculate the resonant frequency of microstrip antenna (rectangular, circular, etc. ), as these are the most popular and convenient shapes [14][15][16][17][18][19]. These techniques can be broadly classified into two categories viz.…”

Section: Introductionmentioning

confidence: 99%

Wideband Gap Coupled Sectoral Antenna for Communication Systems

Kandwal¹,

Chauhan²,

Khah³

2015

PIER C

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Abstract-This paper presents the design of a novel wideband gap coupled sectoral antenna for communication systems. The circular patch is placed in the aperture of four sectoral rings. The antenna parameters are optimized using various simulations to attain good return loss and corresponding resonant frequency. The antenna operates in X-band at 10.35 GHz showing wideband characteristics along with high directivity and reduced side lobe level to a good extent. The antenna has also been studied using fuzzy inference system (FIS). The return loss and analogous frequency obtained from simulated results and fuzzy system are compared and in good agreement. Design is extended to an array of nine elements mutually coupled to the active fed patch. The antenna is fabricated, and the simulated results are found to be in good agreement with experimentally measured ones. A bandwidth of 900 MHz at resonant frequency of 10.35 GHz with a directivity of 7.0 dBi and reduced side lobe level of −18.9 dB is therefore obtained.

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“…Several methods [18][19][20][21][22][23][24], varying in accuracy and computational effort, have been proposed and used to calculate the resonant frequency of a circular MSA with a dielectric cover. The Hankel transform analysis [18], the modified Wolff model [19], Galerkin's method in the Hankel transform domain [22], a formula [23] based on an improved cavity model [25] and Bernhard's work [26] were presented for computing the resonant frequency of a circular MSA with a dielectric cover.…”

Section: Introductionmentioning

confidence: 99%

“…The Hankel transform analysis [18], the modified Wolff model [19], Galerkin's method in the Hankel transform domain [22], a formula [23] based on an improved cavity model [25] and Bernhard's work [26] were presented for computing the resonant frequency of a circular MSA with a dielectric cover. The spectral-domain moment-method proposed by Fan and Lee [20] can also be used to calculate the resonant frequency.…”

Section: Introductionmentioning

confidence: 99%

Resonant Frequency Calculation for Circular Microstrip Antennas With a Dielectric Cover Using Adaptive Network-Based Fuzzy Inference System Optimized by Various Algorithms

Güney¹,

Sarıkaya²

2007

PIER

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Abstract-This paper presents a method based on adaptive-networkbased fuzzy inference system (ANFIS) to calculate the resonant frequency of a circular microstrip antenna (MSA) with a dielectric cover.The ANFIS is a class of adaptive networks which are functionally equivalent to fuzzy inference systems (FISs). Six optimization algorithms, hybrid learning, least-squares, nelder-mead, genetic, differential evolution and particle swarm, are used to determine optimally the design parameters of the ANFIS. The resonant frequency results predicted by ANFIS are in very good agreement with the results reported elsewhere. When the performances of ANFIS models are compared with each other, the best result is obtained from the ANFIS model optimized by the LSQ algorithm. 280 Guney and Sarikaya

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Resonant frequency of circular microstrip antenna covered with dielectric superstrate

Cited by 66 publications

References 19 publications

Effect of Weaving Direction of Conductive Yarns on Electromagnetic Performance of 3D Integrated Microstrip Antenna

Effect of Weaving Direction of Conductive Yarns on Electromagnetic Performance of 3D Integrated Microstrip Antenna

Wideband Gap Coupled Sectoral Antenna for Communication Systems

Resonant Frequency Calculation for Circular Microstrip Antennas With a Dielectric Cover Using Adaptive Network-Based Fuzzy Inference System Optimized by Various Algorithms

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