Spectral electromagnetic modeling of a planar integrated structure with a general grounded anisotropic slab

Abstract

0 . 06 0 . 04 ti. 02 2 4 6 8 1 0 Figure 7 Thickness d3 as a function of the pseudochirality admittance 0, normalized to the free-space impedance ( E ,~ = 5 . E " , F , , = 2 . E,,, eZ. = E(,. p t , = y z z = yo. f = 10 GHz, h = d13) the ordinary (&,) and extraordinary (a,,) waves, when the pseudochirality admittance is given by 7.In this article, based on our theoretical analysis, we studied novel features of the radiated pattern of a point source embedded in a pseudochiral slab. In particular, using the dyadic spectral Green's-function approach, we evaluated the farzone electromagnetic field and the radiated pattern for a horizontal electric point source. It has been shown that the shape of the radiation pattern of the elemental source is strongly affected by the pseudochiral admittance O,, unless the cp = i d 2 cut is considered. Nevertheless, in the cp = 7r/2 cut the radiated field seems to have interesting features for applications. First, we noted by appropriately varying the constitutive parameters and the thickness of the pseudochiral slab, the position of the maxima can be shifted. Second, such a structure can support radiation in the horizon plane. ABSTRACTA common-collector common-emitter PIN-BJT receiver topology is considered for use with optical-fiber pulse position modulation (PPM). The PPM PIN-BJT system is shown to offer a sensitivity improvement of 8.6 d B over a comparable PCM system when both systems are operating at 140 Mbitls and h = 1.3 w . The sensitivity penalty in self-synchronized PPM due to slot clock jitter is considered. This is shown to be significant (3.6 and 6.3 dB) at the set of parameters considered. A n optimum presynchroriization filter is derived and shown to result in the minimization of the jitter penalty. The inclusion of the filter resulted in reduction in the jitter penalty to about 0.1 d B for the two sets of parameters considered. 0

Rectangular Conducting Waveguide Filled with Uniaxial Anisotropic Media: a Modal Analysis and Dyadic Green's Function

“…At present, different anisotropic materials are widely used in integrated optics and microwave engineering [4][5][6][7][8]. The technology advances are making the production of substrates, dielectric anisotropic films and anisotropic material filling more and more convenient.…”

Input impedance of a chirostrip antenna

“…This radial representation is appropriate to simplify the MoM type evaluation of the currents induced on arbitrarily shaped microstrip patch antenna elements, and to extract important information to be used in the project, about the influence of the frequency, constitutive parameters, thickness of the slab, position of the electric source. Moreover, we remark that, once the modelization of the considered biisotropic medium is deduced through the transmission-line analogy [2][3][4][5][6], the number of the dielectric layers and the complexity of the dielectric (isotropic, biisotropic, anisotropic and bianisotropic) substrates are no longer an obstacle for the analysis. As an example, the expression of the spatial field, evaluated at the interface plane, generated by an electric point source embedded in an biisotropic slab, is: (1) OJ(1 +cs2 -.si) ) + (I -cs 9 +n29)I"(p) +\ -2(cos2q-sin2) whee:…”

“…The superscripts and underscripts (TE, TM) refer to the spectral decomposition of the electromagnetic fields in inTE) and TM5) waves [1][2][3][4][5][6]. The definition of the functions fTE and fTM can be found in [1].…”

Spectral dyadic Green's function formulation for uniaxial bianisotropic superstrate-substrate structure

“…Furthermore, using (8) and (22)- (26) we obtain all the elements of the spectral dyadic Green's function in (21), they are in the region ye[h, co)…”

“…With the help of coordinate transform technique given by Toscano and Vegni [7,8], we should change the Cartesian coordinate system Cl(x, y, z) into C2(v, y, u) by using…”