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We present application of EM-simulators for studying characteristics of line parameters of different planar transmission lines. The main objective is to realize different planar transmission lines in EM-simulators and compare their line parameters (de-embedded and non de-embedded) against results from experiments and analytical models for wide range of data, which further proves the validity of the...
This paper describes the effect of anisotropy on the pulse propagation in microstrip like structures for 0 Lt w/h les 10 anisotropic ratio 0.5 les n les 3 for both low and high permittivity substrates. The anisotropic substrate is transformed into an electrically equivalent isotropic substrate such that the line capacitance in both cases is identical. Using this dispersion model of anisotropy for...
In this paper we propose the antenna geometry to design a very compact microstrip patch antenna using thin dielectric substrate having low dielectric constant. This antenna provide better efficiency, better band-width without any enhancement in the weight, volume or cost. HFSS high frequency simulator is employed to analyze the proposed antenna and simulated results on return loss, the E-and H-plane...
This paper addresses simple and straight solution of anisotropy. Dispersion & Characteristic Impedance play the vital role in modeling the circuit characteristics. For anisotropy, Equivalent isotropic relative permittivity epsivr,isoeq is the function of the physical dimension (w/h) of the Microstrip line. Several investigators have used different rigorous numerical solutions as Transmission-Line...
The CAD oriented closed-form model is presented to compute frequency dependent effective relative permittivity and characteristic impedance of a slot-line with finite conductor thickness in the range 3 mum-50 mum. The dielectric loss and conductor loss for slot lines have been computed using the closed-form model. The results have been verified and are found to be in excellent agreement with the practical...
A new combination of aperture coupled microstrip antenna and a quasi-planar penetrating substrate PVC horn is demonstrated to increase the gain of the patch antenna by 6 dB - 8. 68 dB for the patch on substrate having epsir=2.2-13. We also report a new compact 4-element linear aperture coupled microstrip antenna array with surface mounted horn-frame to achieve 3.5 dB gain enhancement. The horn frame...
The effects of permittivity, w/h ratio, and pulse duration on the distortion of Gaussian pulses are investigated. For w/h=1 and in /sub r/<9.7, the pulse distortion becomes independent of the w/h ratio. Using a unified dispersion model, the distortion of a Gaussian pulse on a composite substrate and a suspended substrate is examined. In the case of the composite substrate pulse distortion can be...
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