Numerical modeling of crossover and other junction discontinuities in two‐layer microstrip circuits

Hoorfar, Ahmad; Zheng, Jian Xin; Chang, David C.

doi:10.1002/mmce.4570020408

Cited by 8 publications

(5 citation statements)

References 17 publications

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“…The numerical integration is carried out using contour deformation technique [6]. With the proposed closed form expressions we have found that the computation speed is nearly 100 times faster than with the numerical method.…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

Closed form expressions for Green's functions of microstrip structures on a uniaxially anisotropic substrate

Nelatury

Hoorfar

2003

Int J RF and Microwave Comp Aid Eng

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Closed form expressions for the Green's functions of a planar microstrip structure on an electrically thin uniaxially anisotropic substrate have been derived. The approach is to first obtain the quasi-dynamic term and refine its accuracy with a correction term valid for higher frequencies. The quasi-dynamic term conveys the influence of partial images and includes both transverse and vertical dielectric constants rt and rz . The correction term, on the other hand, results in an expression that includes rz only. Results indicate excellent agreement with exact numerical solution over a significant band of frequencies and over a large range of spatial values.

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Section: Simulation Results and Discussionmentioning

confidence: 99%

Closed form expressions for Green's functions of microstrip structures on a uniaxially anisotropic substrate

Nelatury

Hoorfar

2003

Int J RF and Microwave Comp Aid Eng

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“…In the above TWRI formula, in order to compute the image an efficient evaluation of the layered medium Green's function is required. However, an exact evaluation of the layered medium Green's function is complicated and time consuming as it generally involves the process of numerical or semi‐analytical evaluation of the corresponding Sommerfield integrals [ Hoorfar et al , 1992]. This results in a long computation time in the imaging process and is therefore not well suited for real time TWRI applications; in particular, if the imaging takes too long time, the target may have moved so much that the solution is no longer valid – the target is not in the old place anymore.…”

Section: Full Polarimetric Beam Former For Twrimentioning

confidence: 99%

Full polarimetric beam‐forming algorithm for through‐the‐wall radar imaging

et al. 2011

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[1] Development of an imaging algorithm that accurately models the wave propagation physical process has become an important topic in through-the-wall radar imaging (TWRI). In this paper, a full polarimetric beam-forming algorithm for through-the-wall radar imaging for a general multilayer wall case is presented and applied to various 2D and 3D simulated and measured scenarios. Polarimetric TWRI not only enhances the target characterization but also mitigates the wall ringing effect in cross polarizations. The far field layered medium Green's function is incorporated in the proposed TWRI algorithm for the quad-polarization of the target returns, namely, VV, HV, VH and HH. Due to the incorporation of the layered medium Green's function, the imaging algorithm not only takes into account the wall reflection, bending, and delay effects but also accounts for the complex scattering mechanism due to the presence of the wall. Numerical and experimental results show that the proposed full polarimetric beam former can provide high quality focused images in various wall-target scenarios, in particular, when the technique is combined with a wall parameter estimation technique.

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“…As anticipated, we will discuss some possible disadvantages concerning the use of the SW. First (12)…”

Section: B the Surface Current Representation Based On The Step Windowmentioning

confidence: 99%

An expansion function suited for fast full‐wave spectral domain analysis of microstrip discontinuities

Cicchetti

Faraone

1994

Int. J. Microw. Mill.‐Wave Comput.‐Aided Eng.

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Numerical modeling of crossover and other junction discontinuities in two‐layer microstrip circuits

Cited by 8 publications

References 17 publications

Closed form expressions for Green's functions of microstrip structures on a uniaxially anisotropic substrate

Closed form expressions for Green's functions of microstrip structures on a uniaxially anisotropic substrate

Full polarimetric beam‐forming algorithm for through‐the‐wall radar imaging

An expansion function suited for fast full‐wave spectral domain analysis of microstrip discontinuities

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