Mutual Coupling of Printed Elements on a Cylindrically Layered Structure Using Closed-Form Green's Functions

Acar, Rüyam; Dural, G.

doi:10.2528/pier07082101

Cited by 20 publications

(9 citation statements)

References 27 publications

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“…can be found in the Appendix of [23]. Next, we will derive the spectral-domain MPGFs for the e jωt time convention.…”

Section: Eh Pqmentioning

confidence: 99%

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An Efficient Method for the Computation of Mixed Potential Green's Functions in Cylindrically Stratified Media

Ye¹,

Xiao²,

Qiu³

et al. 2012

PIER

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Abstract-Closed-form mixed potential Green's functions (MPGFs) for cylindrically stratified media are derived in terms of quasistaticwave and surface-wave contributions. In order to avoid possible overflow/underflow problems in the numerical calculations of special cylindrical functions such as Bessel and Hankel functions, a novel form of the spectral-domain MPGFs is developed. Then, a twolevel methodology is used for the approximation of the spectraldomain MPGFs. In the first step, the qusistatic components are extracted from the spectral-domain MPGFs, and then transformed into the space domain with the use of the Sommerfeld identity and its derivatives. In the second step, the remaining parts of the spectral-domain MPGFs are approximated in terms of pole-residue expressions via the rational function fitting method (RFFM). The proposed method is efficient and fully automatic, which avoids an analytical cumbersome extraction of the surface wave poles (SWPs), prior to the spectrum fitting. In addition, this method can evaluate the spatial-domain MPGFs accurately and efficiently for both the nearand far-fields. Finally, numerical results for the spatial-domain MPGFs of a two-layer structure are presented and discussed.

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“…can be found in the Appendix of [23]. Next, we will derive the spectral-domain MPGFs for the e jωt time convention.…”

Section: Eh Pqmentioning

confidence: 99%

“…Thus, (16) and (20) are not valid in the proposed RFFM method, and (22) can not be applied for obtaining the spatial domain MPGFs. To alleviate this problem, a hybrid method [23] or a small argument Hankel function approximation method [15] should be applied in the MoM-based algorithm.…”

Section: Eh Pqmentioning

confidence: 99%

An Efficient Method for the Computation of Mixed Potential Green's Functions in Cylindrically Stratified Media

Ye¹,

Xiao²,

Qiu³

et al. 2012

PIER

View full text Add to dashboard Cite

show abstract

“…In order to solve this problem, a Green's function technique is adopted [10][11][12][13][14][15][16]. According to the Reciprocity theorem, a response of a system to a source is unchanged when source and measurer are interchanged.…”

Section: Theoretical Electromagnetic Analysismentioning

confidence: 99%

Electromagnetic Analysis of a Non Invasive Microwave Radiometry Imaging System Emphasizing on the Focusing Sensitivity Optimization

Giamalaki¹,

Karanasiou²,

Uzunoglu

2009

PIER

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Abstract-A Green's function based methodology has been developed and implemented with the view to optimize the focusing properties and thus the performance of a Microwave Radiometry Imaging System (MiRaIS). The system consists of an ellipsoidal conductive wall cavity and a sensitive radiometric receiver and its operation principal is based on the convergence of the radiation from one focal point, where the subject or phantom is placed, on the other, where the receiver antenna is positioned. A two-layered cylinder is used to model the human head with the semi-analytical Green's function technique. The imaging configuration is enhanced by different matching structures of various materials which are placed on the surface of both the human head model and the antenna inside the ellipsoidal. Numerical code executions have been realized and the results for the electric field distribution inside the head are presented for materials of various dielectric properties and for left handed materials at two different frequencies (0.5 GHz and 1.0 GHz). Increased sensitivity of the system focusing properties is observed using particular matching structures.

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“…As fullwave solutions are more accurate and applicable to many structures, some researchers begin to study the MoM-based solution for MSAs, such as [4][5][6][7][8][9][10][11][12][13] in recent years. The integral equation formulation solved using the method of moments (MoM) [14][15][16] is known as an efficient tool.…”

Section: Introductionmentioning

confidence: 99%

Computer Aided Design and Simulation of a Multiobjective Microstrip Patch Antenna for Wireless Applications

Singh¹,

Gangwar²

2011

IJACSA

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Abstract-The utility and attractiveness of microstrip antennas has made it ever more important to find ways to precisely determine the radiation patterns of these antennas. Taking benefit of the added processing power of today's computers, electromagnetic simulators are emerging to perform both planar and 3D analysis of high-frequency structures. One such tool studied was IE3D, which is a program that utilizes method of moment. This paper makes an investigation of the method used by the program, and then uses IE3D software to construct microstrip antennas and analyze the simulation results. The antenna offers good electrical performance and at the same time preserves the advantages of microstrip antennas such as small size, easy to manufacture as no lumped components are employed in the design and thus, is low cost; and most importantly, it serves multiple wireless applications.

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Mutual Coupling of Printed Elements on a Cylindrically Layered Structure Using Closed-Form Green's Functions

Cited by 20 publications

References 27 publications

An Efficient Method for the Computation of Mixed Potential Green's Functions in Cylindrically Stratified Media

An Efficient Method for the Computation of Mixed Potential Green's Functions in Cylindrically Stratified Media

Electromagnetic Analysis of a Non Invasive Microwave Radiometry Imaging System Emphasizing on the Focusing Sensitivity Optimization

Computer Aided Design and Simulation of a Multiobjective Microstrip Patch Antenna for Wireless Applications

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