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# IEEE Transactions on Microwave Theory and Techniques

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Displaying Results 1 - 25 of 28
• ### Microstrip resonators on anisotropic substrates

Publication Year: 1992, Page(s):762 - 765
Cited by:  Papers (10)
| | PDF (324 KB)

The spectral domain method is applied to study shielded microstrip resonators printed on anisotropic substrates. A Green's function that takes into account the dielectric anisotropy effects is derived through a fourth-order formulation. Galerkin's method is then applied to form the characteristic equation from which the resonant frequency of the microstrip resonator is numerically obtained. Result... View full abstract»

• ### Surface wave modes of printed circuits on ferrite substrates

Publication Year: 1992, Page(s):613 - 621
Cited by:  Papers (28)
| | PDF (528 KB)

Surface waves due to a current source on a grounded ferrite slab are investigated. Electromagnetic fields of the structure are in terms of a continuous plane wave spectrum. The spectrum of each field component is obtained numerically through the exponential-matrix method. The surface waves of the structure are extracted from the continuous spectrum by using the residue theorem and the method of st... View full abstract»

• ### An improved iterative technique for the quasi-TEM analysis of generalized planar lines

Publication Year: 1992, Page(s):652 - 658
Cited by:  Papers (9)
| | PDF (636 KB)

The generalized bioconjugate gradient method (GBGM) and fast Fourier transform (FFT) algorithm are used for the quasi-transverse electromagnetic (TEM) analysis of generalized multistrip lines embedded in multilayered lossless/lossy, iso/anisotropic dielectric and/or magnetic media. Important computational improvement is achieved by including asymptotic extraction techniques in the determination of... View full abstract»

• ### Analysis of a new configuration of coplanar stripline

Publication Year: 1992, Page(s):772 - 774
Cited by:  Papers (10)  |  Patents (3)
| | PDF (256 KB)

A new configuration of coplanar stripline is presented and analyzed. This configuration is derived by augmenting coplanar stripline (CPS) with electrically wide lateral ground planes on either side of the balanced pair of signal lines. The ground planes should replace line-to-line coupling in complex circuits and eliminate the TE0 parasitic dielectric slab waveguide mode. Also, the spa... View full abstract»

• ### A linear-operator formalism for the analysis of inhomogeneous biisotropic planar waveguides

Publication Year: 1992, Page(s):672 - 678
Cited by:  Papers (17)
| | PDF (528 KB)

Using the theory of linear operators, guided electromagnetic wave propagation in inhomogeneous (nonreciprocal) biisotropic planar structures is analyzed in terms of a 2×2 matrix differential operator. Based on the concept of adjoint waveguide, a new biorthogonality relation for the guided hybrid modes is derived. For the special case of reciprocal biisotropic media or chiral media, the linea... View full abstract»

• ### Muscle-equivalent phantom materials for 10-100 MHz

Publication Year: 1992, Page(s):760 - 762
Cited by:  Papers (6)
| | PDF (296 KB)

New tissue-simulating materials that are aqueous solutions are described. Glycine is used to obtain the large permittivity of muscle at frequencies below 100 MHz. The lack of suspended solids simplifies preparation, and ensures the dielectric properties are homogeneous, stable, and reproducible. The solutions are transparent, facilitating placement of probes for measuring temperature or electric f... View full abstract»

• ### Analysis of a microstrip line terminated with a shorting pin

Publication Year: 1992, Page(s):645 - 651
Cited by:  Papers (11)
| | PDF (508 KB)

A full-wave moment method solution to the problem of a semi-infinite microstrip line terminated with a shorting pin is presented. The electric current on the line is expanded in terms of longitudinal piecewise sinusoidal modes near the open end, with entire domain traveling-wave modes to represent incident and reflected waves away from the open end. Also, the electric current near the shorting pin... View full abstract»

• ### A study of the nonorthogonal FDTD method versus the conventional FDTD technique for computing resonant frequencies of cylindrical cavities

Publication Year: 1992, Page(s):741 - 746
Cited by:  Papers (65)
| | PDF (496 KB)

The nonorthogonal finite-difference-time-domain (FDTD) technique is used to compute the resonant frequencies of dielectric-filled cylindrical cavities. Because the method is based on the nonorthogonal coordinate system, it is not restricted to specific geometries, e.g. rectangular or axially symmetric geometries, and is suitable for analyzing cavities of arbitrary shape. The advantages of this tec... View full abstract»

• ### Rigorous analysis of multiple coupled rib waveguides

Publication Year: 1992, Page(s):706 - 715
Cited by:  Papers (1)
| | PDF (764 KB)

The general problem of multiple coupled rib waveguides, where energy may be leaked from one guide to the other via the substrate and radiation mode, is treated. Rigorous results including substrate and air modes coupling are sought for the general case of coupling of two or more different guides. The analysis, developed in terms of a cascade of the transverse steps, utilizing a variational solutio... View full abstract»

• ### Analysis of multilayer microstrip lines by a conformal mapping method

Publication Year: 1992, Page(s):769 - 772
Cited by:  Papers (67)
| | PDF (300 KB)

Multilayer microstrip transmission lines are investigated. The conformal mapping method is used to obtain simple analytical relations for the filling factors and the effective permittivity of two fundamental types of three-layer microstrips. Numerical results obtained by the present method are compared with available data from other authors View full abstract»

• ### Modal analysis of multi-connected waveguides

Publication Year: 1992, Page(s):665 - 671
Cited by:  Papers (6)
| | PDF (520 KB)

A general analysis for the modal characterization of multiconnected uniform, hollow, conducting waveguides is presented. It is relevant to waveguides with an outer' conductor for which analytical Green's functions are known and inner' conductors described by integral equations. The transverse electromagnetic (TEM)-mode space is analyzed, and singularities of the integral equations are studied to... View full abstract»

• ### A general approach to network analyzer calibration

Publication Year: 1992, Page(s):754 - 759
Cited by:  Papers (51)
| | PDF (460 KB)

A general-purpose algorithm, the TCX algorithm, for network analyzer and test fixture calibration is presented. The algorithm can handle most of the existing calibration methods, including symmetrical test fixtures. Any combination of one-port or two-port standards can be used. There is a possibility of partial self-calibration, if one of the standards is a two-port network or a through connection... View full abstract»

• ### Analysis of the time response of multiconductor transmission lines with frequency-dependent losses by the method of convolution-characteristics

Publication Year: 1992, Page(s):637 - 644
Cited by:  Papers (35)
| | PDF (608 KB)

A new method for analysis of the time response of multiconductor transmission lines with frequency-dependent losses is presented. This method can solve the time response of various kinds of transmission lines with arbitrary terminal networks. Particularly, it can analyze nonuniform lines with frequency-dependent losses, for which no effective method for analyzing their time response exists. This m... View full abstract»

• ### Matrix theory approach to complex waves [in shielded lossless guides]

Publication Year: 1992, Page(s):781 - 785
Cited by:  Papers (15)
| | PDF (440 KB)

Complex waves in shielded lossless inhomogeneous isotropic guides are investigated. A critical appraisal of the existing theory of complex waves is given and a new approach is proposed. A mathematical condition for the existence of complex waves is derived using the properties of a generalized symmetric matrix eigenvalue problem. It is shown that complex waves may exist in slightly perturbed homog... View full abstract»

• ### Synthesis techniques for high performance octave bandwidth 180° analog phase shifters

Publication Year: 1992, Page(s):731 - 740
Cited by:  Papers (42)  |  Patents (2)
| | PDF (688 KB)

Novel techniques for synthesizing 180° analog reflection-type phase shifters, with ultra-low phase and amplitude error characteristics, over a very wide bandwidth, are presented. The novel approach of cascading stages, where the nonlinear performance of each stage complements those of the others, results in a significant advance in the linearity performance of traditional reflection-type phase... View full abstract»

• ### Iterative solution of the eigenvalue problem for a dielectric waveguide

Publication Year: 1992, Page(s):699 - 705
Cited by:  Papers (17)
| | PDF (540 KB)

The authors present a numerical approach to the simulation of dielectric waveguides that is free of spurious modes and is based on the solution of an eigenvalue problem for the two transverse components of the magnetic field. They introduce a new discretization which has several computational advantages. In particular, by careful design of the discretization procedure, the authors obtain systems o... View full abstract»

• ### Analysis of a coupled slotline on a double-layered substrate containing a magnetized ferrite

Publication Year: 1992, Page(s):765 - 768
Cited by:  Papers (5)
| | PDF (280 KB)

Nonreciprocity in the propagation characteristics of the even and odd modes in magnetized-ferrite-loaded double-layered coupled slotlines is studied. The analysis is based on Galerkin's method applied in the Fourier transform domain. Numerical results are presented for various values of structural parameters. As a result, it is found that the waveguide structures studied have sufficient nonrecipro... View full abstract»

• ### A simple technique for calculating the propagation dispersion of multiconductor transmission lines in multilayer dielectric media

Publication Year: 1992, Page(s):622 - 627
Cited by:  Papers (14)
| | PDF (568 KB)

A multiconductor transmission line in a multilayer dielectric medium is complicated and therefore is frequently analyzed by the simple quasi-TEM (transverse electromagnetic) approach. Unlike the full wave eigenvalue approach, the quasi-TEM approach does not give the propagation dispersion characteristics of the line. This work overcomes this problem by first obtaining the solution of each multicon... View full abstract»

• ### Static analysis of V transmission lines

Publication Year: 1992, Page(s):659 - 664
Cited by:  Papers (28)
| | PDF (476 KB)

A static analysis of V-shaped transmission lines is performed using a moment method formulation. Measurements were performed on a sample, and the validity of the theoretical results is verified by the experimental data. Characteristic impedance and propagation velocity are found to be strongly dependent on the angle parameter. Comparison with microstrip indicates a lower characteristic impedance a... View full abstract»

• ### A dispersive boundary condition for microstrip component analysis using the FD-TD method

Publication Year: 1992, Page(s):774 - 777
Cited by:  Papers (91)
| | PDF (324 KB)

A dispersive absorbing boundary condition (DBC) which allows the dispersion characteristics of waves to be used as a criterion for designing absorbing boundary conditions is presented. Its absorbing quality is superior to that of the presently used Mur's first-order boundary condition for microstrip component analysis, and its implementation is much simpler when compared to that of the super bound... View full abstract»

• ### Modes and attenuation constants in circular hollow waveguides with small core diameters for the infrared

Publication Year: 1992, Page(s):679 - 685
Cited by:  Papers (15)
| | PDF (504 KB)

The mode structures and attenuation constants in circular hollow waveguides are evaluated numerically based on the exact characteristic equations. Mode properties, which are strongly dependent on waveguide materials, and attenuation constants are discussed when the core diameter becomes small. Special modes are also analyzed in oversized metallic waveguides which approach very familiar modes in pe... View full abstract»

• ### New results for coaxial re-entrant cavity with partially dielectric filled gap

Publication Year: 1992, Page(s):747 - 753
Cited by:  Papers (26)  |  Patents (3)
| | PDF (540 KB)

Resonant frequencies, Q-factor and electromagnetic field intensity are presented for a set of varied parameters of a coaxial re-entrant cavity with a gap partially filled with a dielectric. The cavity is analyzed using the mode matching technique. The numerical results are found to be in good agreement with experimental data. Based on the numerical results, a scheme for mode identificatio... View full abstract»

• ### A generalized recursive algorithm for wave-scattering solutions in two dimensions

Publication Year: 1992, Page(s):716 - 723
Cited by:  Papers (47)
| | PDF (696 KB)

A generalized recursive algorithm valid for both the E z and Hz wave scattering of densely packed scatterers in two dimensions is derived. This is unlike previously derived recursive algorithms which have been found to be valid only for Ez polarized waves. In this generalized recursive algorithm, a scatterer is first divided into ... View full abstract»

• ### A multipipe model of general strip transmission lines for rapid convergence of integral equation singularities

Publication Year: 1992, Page(s):628 - 636
Cited by:  Papers (19)
| | PDF (568 KB)

An integral equation for solving thin conducting strip problems always involves three singularities, namely, two charge singularities at the strip edges and the Green's function singularity for close proximity of source and field points. This work overcomes the singularity convergence problem using Gauss-Chebyshev quadrature for the edge charges, but more importantly by a multipipe model for the G... View full abstract»

• ### New broadband rectangular waveguide with L-shaped septa

Publication Year: 1992, Page(s):777 - 781
Cited by:  Papers (13)
| | PDF (396 KB)

Broadband septum waveguides that are a variant of the previously reported double T-septa guide (DTSGs) are proposed. These guides have L-shaped septa located antisymmetrically and are called double L-septa guides (DLSG). The authors present the theoretical cutoff and bandwidth characteristics of the dominant TE modes of the DLSG, compare them with those of DTSG, and examine the effect of partial o... View full abstract»

## Aims & Scope

The IEEE Transactions on Microwave Theory and Techniques focuses on that part of engineering and theory associated with microwave/millimeter-wave components, devices, circuits, and systems involving the generation, modulation, demodulation, control, transmission, and detection of microwave signals. This includes scientific, technical, and industrial, activities. Microwave theory and techniques relates to electromagnetic waves usually in the frequency region between a few MHz and a THz; other spectral regions and wave types are included within the scope of the Society whenever basic microwave theory and techniques can yield useful results. Generally, this occurs in the theory of wave propagation in structures with dimensions comparable to a wavelength, and in the related techniques for analysis and design..

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## Meet Our Editors

Editor-in-Chief
Luca Perregrini
luca.perregrini@unipv.it

Editor-in-Chief
Jose Carlos Pedro
edit.tmtt@ua.pt