IEEE Transactions on Microwave Theory and Techniques

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Publication Year: 2012, Page(s):C1 - C4
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• IEEE Transactions on Microwave Theory and Techniques publication information

Publication Year: 2012, Page(s): C2
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• Theory of Magnetic Transmission Lines

Publication Year: 2012, Page(s):2941 - 2949
Cited by:  Papers (5)
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This paper presents, for the first time, the frequency-domain theory of magnetic transmission lines, i.e., transmission lines where electromagnetic energy guidance is assured by means of two magnetic-flux carrying parallel magnetic wires, as opposed to the ordinary situation of two current carrying parallel electric wires (an electric transmission line). Propagation equations for the fundamental q... View full abstract»

• A Mode-Matching Approach to Electromagnetic Wave Propagation in Nematic Liquid Crystals

Publication Year: 2012, Page(s):2950 - 2958
Cited by:  Papers (2)
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In this paper, we present a computationally efficient and highly accurate numerical method for the analysis of electromagnetic wave propagation in nematic liquid crystal (N-LC) cells. An iterative procedure is employed where the mode-matching technique (MMT) is used to solve the time-harmonic Maxwell equations inside the N-LC cell, whereas a finite-difference method (FDM) with relaxation is utiliz... View full abstract»

• A Time-Domain Adjoint Variable Method for Materials With Dispersive Constitutive Parameters

Publication Year: 2012, Page(s):2959 - 2971
Cited by:  Papers (8)
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We present the first time-domain adjoint variable method (AVM) algorithm for materials with dispersive constitutive parameters. We develop our algorithm based on transmission-line modeling techniques for electromagnetic problems. The developed theory is based on utilizing the Z-domain representation of the dispersive materials, which can model arbitrary dispersive behavior. We develop a for... View full abstract»

• Hybrid Field/Transmission-Line Model for the Study of Coaxial Corrugated Waveguides

Publication Year: 2012, Page(s):2972 - 2978
Cited by:  Papers (1)
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A transmission-line model is reformulated and combined with field theory to study the propagation characteristics in coaxial waveguides with wedge-shaped corrugations, either on the outer wall or the inner conductor. Numerical results show that this equivalent-circuit approach is in agreement with conventional full-wave methods presented in the literature. Additionally, this formulation overcomes ... View full abstract»

• Efficient Analysis of Metallic and Dielectric Posts in Parallel-Plate Waveguide Structures

Publication Year: 2012, Page(s):2979 - 2989
Cited by:  Papers (25)
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A mode-matching method is proposed for the accurate and fast analysis of structures composed by metallic and dielectric posts in a parallel-plate waveguide environment. The incident and scattered fields on each post are expressed with a cylindrical mode expansion. After enforcing the appropriate boundary conditions, a set of matrix equations is derived. The corresponding solution are the coefficie... View full abstract»

• Subgradient Techniques for Passivity Enforcement of Linear Device and Interconnect Macromodels

Publication Year: 2012, Page(s):2990 - 3003
Cited by:  Papers (14)
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This paper presents a class of nonsmooth convex optimization methods for the passivity enforcement of reduced-order macromodels of electrical interconnects, packages, and linear passive devices. Model passivity can be lost during model extraction or identification from numerical field solutions or direct measurements. Nonpassive models may cause instabilities in transient system-level simulation, ... View full abstract»

• Mode Analysis of the Corrugated Substrate Integrated Waveguide

Publication Year: 2012, Page(s):3004 - 3012
Cited by:  Papers (16)  |  Patents (1)
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The corrugated substrate integrated waveguide (CSIW) is compatible with substrate integrated waveguides (SIWs) but permits ease of integration of active devices. The CSIW differs from the SIW by using quarter-wave open-circuit stubs in place of vias to form the electric sidewalls. In this paper, an efficient analysis method has been formulated that distributes the loading effect of each stub acros... View full abstract»

• Polarization-Independent Metamaterial Analog of Electromagnetically Induced Transparency for a Refractive-Index-Based Sensor

Publication Year: 2012, Page(s):3013 - 3022
Cited by:  Papers (51)
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A polarization-independent metamaterial analog of electromagnetically induced transparency (EIT) at microwave frequencies for normal incidence and linearly polarized waves is experimentally and numerically demonstrated. The metamaterial consists of coupled “bright” split-ring resonators (SRRs) and “dark” spiral resonators (SRs) with virtually equal resonance frequencies... View full abstract»

• Common-Mode Suppression in Microstrip Differential Lines by Means of Complementary Split Ring Resonators: Theory and Applications

Publication Year: 2012, Page(s):3023 - 3034
Cited by:  Papers (76)
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This paper is focused on the application of complementary split-ring resonators (CSRRs) to the suppression of the common (even) mode in microstrip differential transmission lines. By periodically and symmetrically etching CSRRs in the ground plane of microstrip differential lines, the common mode can be efficiently suppressed over a wide band whereas the differential signals are not affected. Thro... View full abstract»

• Dual Composite Right-/Left-Handed Coplanar Waveguide Transmission Line Using Inductively Connected Split-Ring Resonators

Publication Year: 2012, Page(s):3035 - 3042
Cited by:  Papers (5)
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In this paper, a simple geometrical modification of the well-known split-ring resonator (SRR) topology is proposed. This modification consists of joining the opposite sides of the rings by means of an inductive connection. Due to this modification, it is possible to synthesize a dual composite right-/left-handed artificial transmission line from a host coplanar waveguide (CPW). In addition, it is ... View full abstract»

• Pseudo-Traveling-Wave Resonator With Magnetically Tunable Phase Gradient of Fields and Its Applications to Beam-Steering Antennas

Publication Year: 2012, Page(s):3043 - 3054
Cited by:  Papers (23)  |  Patents (1)
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A pseudo-traveling-wave resonator with magnetically tunable phase gradient of field distribution is investigated, and a new type of beam-steering antenna based on the resonator is experimentally demonstrated for the first time. It is a short-ended transmission-line resonator and is composed of a nonreciprocal phase-shift composite right/left-handed transmission line using a polycrystalline yttrium... View full abstract»

• A Novel Dual-Band 3-dB Branch-Line Coupler Design With Controllable Bandwidths

Publication Year: 2012, Page(s):3055 - 3061
Cited by:  Papers (22)
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This paper presents, for the first time, the design and implementation of a dual-band branch-line coupler with unequal operating bandwidths. The control of bandwidths is accomplished by the use of dual-band quarter-wavelength impedance transformer with controllable phase slopes over the two designated frequency bands. The adjustment of phase slopes is attained by the proper selection of the circui... View full abstract»

• Ultra-Wideband Single and Dual Baluns Based on Substrate Integrated Coaxial Line Technology

Publication Year: 2012, Page(s):3062 - 3070
Cited by:  Papers (19)
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In this paper, ultra-wideband (UWB) Marchand baluns using substrate integrated coaxial line (SICL) technology are first proposed. SICL is a shielded planar coaxial line, which is very suitable for wideband and high-speed applications due to its broad unimodal operation band, low insertion loss, very small dispersion, and easy integration with other planar circuits. In order to achieve wider bandwi... View full abstract»

• Substrate Integrated Waveguide Quasi-Elliptic Filters With Controllable Electric and Magnetic Mixed Coupling

Publication Year: 2012, Page(s):3071 - 3078
Cited by:  Papers (40)
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This paper proposes a type of quasi-elliptic filter with controllable electric and magnetic mixed coupling based on substrate integrated waveguide cavity resonators using two-layer printed circuit board process. For the second-order mixed coupling filter, an embedded short-ended strip line is combined with a conventional inductive window between two cavities to create the mixed coupling, in which ... View full abstract»

• A Finite-Element Algorithm for the Adjustment of the First Circulation Condition of the Turnstile Waveguide Circulator

Publication Year: 2012, Page(s):3079 - 3087
Cited by:  Papers (3)
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The adjustment of the first circulation condition of the waveguide turnstile junction is an eigenvalue problem. It fixes all the physical parameters of the circulator, except for the gyrotropy. This paper describes an algorithm in conjunction with a finite-element solver for the adjustment of this class of junction. It is met provided the in-phase and counter-rotating eigen-networks of the junctio... View full abstract»

• A 3-D Table-Based Method for Non-Quasi-Static Microwave FET Devices Modeling

Publication Year: 2012, Page(s):3088 - 3095
Cited by:  Papers (9)
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A highly accurate method of building a large-signal modeling approach considering dispersive effect of field-effect transistors is presented in this paper. The non-quasi-static effect of the transistor is described through high-order constitutive nonlinear current sources and charge sources. The extraction and building of these sources are executed by polynomial regression, which is fast and deter... View full abstract»

• A High-Reliability High-Linearity High-Power RF MEMS Metal-Contact Switch for DC–40-GHz Applications

Publication Year: 2012, Page(s):3096 - 3112
Cited by:  Papers (37)
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This paper presents an mN-level contact and restoring force RF microelectromechanical systems metal-contact switch exhibiting high reliability, high linearity, and high power handing for dc-40-GHz applications. The device, which is insensitive to stress and temperature effects, achieves 1.2-1.5 mN of contact force (per contact) from 80 to 90 V and 1.0 mN of restoring force (per contact). The up-st... View full abstract»

• Analysis and Design of 60-GHz SPDT Switch in 130-nm CMOS

Publication Year: 2012, Page(s):3113 - 3119
Cited by:  Papers (22)
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This paper proposes a new 60-GHz single-pole-double-throw (SPDT) switch. It is designed in a 1.2-V 130-nm bulk CMOS and has a small core area of 222 μm × 92 μm. The switch exhibits measured insertion loss of 1.7 dB, isolation of 22 dB, input return loss of 20 dB, output return loss of 14 dB, and simulated power-handling capability of 13.8 dBm at 60 GHz. The proposed SPDT switc... View full abstract»

• Pulse-Biased Low-Power Low-Phase-Noise UHF LC-QVCO for 866 MHz RFID Front-End

Publication Year: 2012, Page(s):3120 - 3125
Cited by:  Papers (5)
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This paper discusses an 866-MHz UHF quadrature voltage-controlled oscillator (QVCO) for RFID front-end. The VCO achieved an improved phase noise performance of -130 dBc/Hz at a carrier-offset of 1 MHz using an improved architecture employing pulsed self-biasing. It was fabricated using the IBM 130-nm CMOS process with the core VCO occupying around 0.36 mm2 die area. The loading effect o... View full abstract»

• Large-Signal Oscillator Design Procedure Utilizing Analytical $X$-Parameters Closed-Form Expressions

Publication Year: 2012, Page(s):3126 - 3136
Cited by:  Papers (12)
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New analytical behavioral model formulations based on the polyharmonic distortion (PHD) model have been successfully used to describe the nonlinear behavior of transistors and circuits. In this paper, the PHD model and its associated analytical X -parameters formulation will be utilized to provide an analytical design procedure for use in nonlinear microwave circuit design. For RF oscillato... View full abstract»

• Analysis of Oscillation Modes in Free-Running Ring Oscillators

Publication Year: 2012, Page(s):3137 - 3150
Cited by:  Papers (4)
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An in-depth investigation of oscillation modes in ring oscillators is presented. The small-signal stability is initially considered, demonstrating that the poles associated with the dc regime are uniformly distributed on a circle on the complex plane, with increasing density for a higher number of stages. The existence of multiple pairs of poles on the right-hand side of the complex plane gives ri... View full abstract»

• Design of Low Phase-Noise Microwave Oscillator and Wideband VCO Based on Microstrip Combline Bandpass Filters

Publication Year: 2012, Page(s):3151 - 3160
Cited by:  Papers (19)
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This paper presents a new low phase-noise microwave oscillator and wideband voltage-controlled oscillator (VCO) based on microstrip combline bandpass filters. For this type of oscillator, the passband filter is embedded into the feedback loop to treat as a frequency stabilization element. Instead of designing the oscillator at the group-delay-peak frequency of the filter to achieve a good phase-no... View full abstract»

• Low-Power-Consumption Wide-Locking-Range Dual-Injection-Locked 1/2 Divider Through Simultaneous Optimization of VCO Loaded $Q$ and Current

Publication Year: 2012, Page(s):3161 - 3168
Cited by:  Papers (7)
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A new 1/2 dual-injection-locked frequency divider (dual-ILFD) with wide locking range and low-power consumption is proposed, analyzed, and developed together with a divide-by-2 current-mode logic (CML) divider. The chip was fabricated using a 0.18-μm BiCMOS process. The 1/2 dual-ILFD enhances the locking range with low-power consumption through optimized load quality factor (QL) and ... 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