Paraxial space-domain formulation for surface fields on a large dielectric coated circular cylinder

Ertürk, Vakur B.; Rojas, R.G.

doi:10.1109/tap.2002.803955

Cited by 19 publications

(24 citation statements)

References 11 publications

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“…are a Fock-type Airy function and its first derivative, respectively, obtained through Fock substitution [22]: v = k p0 b+m t T. Thus, the corrected TE surface impedances in (16) only the first surface ray is enough for sufficiently large radii cylinders. The geometrical parameters of the structure are defined in Fig.…”

Section: Here W 2 (T) and W^t)mentioning

confidence: 99%

“…patches). Only non-paraxial region has been considered, however the analysis method could be enhanced by implementing one of the asymptotic solutions valid within the paraxial region and available in the literature [15], [16]. Moreover, further study of analytic methods for the canonical problem of microstrip antennas on coated circular-cylindrical or spherical structures may lead toward the development of an efficient designing tool for patch arrays printed over large arbitrary convex coated surfaces [7].…”

mentioning

confidence: 99%

“…D Ul = 0. Therefore, for a given geometry, a constant surface impedance can be obtained by substituting v\ in (17) (or in (18)) and in (16). In the UTD formulation, the axial wave number k z only depend on the surface ray inclination a.…”

mentioning

confidence: 99%

“…In the UTD formulation, the axial wave number k z only depend on the surface ray inclination a. Thus, with a constant TM and TE surface impedance, the solution presented in [12], [13] could be effectively applied when a dielectric coating is present, but introducing the corrected TE surface impedance in (16). The nature of the poles on the complex ¡/-plane and the root searching are discussed in next section.…”

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confidence: 99%

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An Asymptotic Solution for Surface Fields on a Dielectric-Coated Circular Cylinder With an Effective Impedance Boundary Condition

Aguilar

Šipuš

Sierra‐Pérez

2013

IEEE Trans. Antennas Propagat.

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Abstract-An effective surface impedance approach is introduced for determining surface fields on an electrically large dielectric-coated metallic circular cylinder. Differences in analysis of rigorously-treated coated metallic cylinders and cylinders with an impedance boundary condition (IBC) are discussed. While for the impedance cylinder case a single constant surface impedance is considered, for the coated metallic cylinder case two surface impedances are derived. These are associated with the TM and TE creeping wave modes excited on a cylinder and depend on observation and source positions and orientations. With this in mind, a uniform theory of diffraction (UTD) based method with IBC is derived for the surface fields by taking into account the surface impedance variation. The asymptotic expansion is performed, via the Watson transformation, over the appropriate series representation of the Green's functions, thus avoiding higher-order derivatives of Fock-type integrals, and yielding a fast and an accurate solution. Numerical examples reveal a very good accuracy for large cylinders when the separation between the observation and the source point is large. Thus, this solution could be efficiently applied in mutual coupling analysis, along with the method of moments (MoM), of large conformal microstrip array antennas.

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Section: Here W 2 (T) and W^t)mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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An Asymptotic Solution for Surface Fields on a Dielectric-Coated Circular Cylinder With an Effective Impedance Boundary Condition

Aguilar

Šipuš

Sierra‐Pérez

2013

IEEE Trans. Antennas Propagat.

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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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Novel meandered planar inverted-F antenna for triple-frequency operation

Dou¹,

Chia²

2000

Microw. Opt. Technol. Lett.

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cations. To optimize the design parameters, the Sonnet (a method of moments (MoM) full-wave simulator) was used. Although the simulated results slightly disagree with the measured results due to the infinite-substrate presumption of the Sonnet simulator, the simulated results are still valuable and necessary. After the simulated optimum is obtained, the prototype is constructed by printing the patches on the 0.8-mm FR4 substrate. The reflection loss and radiation patterns are measured and discussed as follows.The simulated and measured results of reflection loss are shown in Figure 2. The resonant frequencies are indeed located at the EGSM and DCS bands. The measured bandwidths (determined by 1:2.5 VSWR) are about 120 and 124 MHz at the EGSM and DCS bands, respectively. The bandwidths are almost large enough to meet the bandwidth requirements of the EGSM/DCS systems, and are much better than those obtained in [2-4], especially at the EGSM band.Measured radiation patterns are presented in Figures 3 and 4 for the resonant frequencies at the EGSM and DCS bands, respectively. For both resonant frequencies, good omnidirectional radiation is observed. The maximum antenna gains for both the copolarization and cross-polarization patterns are estimated to be about 2.8 and 4.9 dBi across the EGSM and DCS bands, respectively. CONCLUSIONA novel NMFGA design has been proposed. A dual-band NMFGA prototype has been shown as an example. It has been demonstrated that the resonant modes at the EGSM and DCS bands can be excited. As the measured and simulated results show, not only the radiation characteristics but also the impedance-matching bandwidths are very attractive for EGSM/DCS dual-band applications.

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Paraxial space-domain formulation for surface fields on a large dielectric coated circular cylinder

Cited by 19 publications

References 11 publications

An Asymptotic Solution for Surface Fields on a Dielectric-Coated Circular Cylinder With an Effective Impedance Boundary Condition

An Asymptotic Solution for Surface Fields on a Dielectric-Coated Circular Cylinder With an Effective Impedance Boundary Condition

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

Novel meandered planar inverted-F antenna for triple-frequency operation

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