# IEEE Transactions on Microwave Theory and Techniques

## Filter Results

Displaying Results 1 - 25 of 32

Publication Year: 2011, Page(s):C1 - C4
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• ### IEEE Transactions on Microwave Theory and Techniques publication information

Publication Year: 2011, Page(s): C2
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• ### A Semianalytical Spectral Element Method for the Analysis of 3-D Layered Structures

Publication Year: 2011, Page(s):1 - 8
Cited by:  Papers (19)
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A semianalytical spectral element method (SEM) is proposed for electromagnetic simulations of 3-D layered structures. 2-D spectral elements are employed to discretize the cross section of a layered structure, and the Legendre transformation is then used to cast the semidiscretized problem from the Lagrangian system into the Hamiltonian system. A Riccati equation-based high precision integration me... View full abstract»

• ### A Common Electromagnetic Framework for Carbon Nanotubes and Solid Nanowires—Spatially Dispersive Conductivity, Generalized Ohm's Law, Distributed Impedance, and Transmission Line Model

Publication Year: 2011, Page(s):9 - 20
Cited by:  Papers (20)
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General equations are presented for the spatially dispersive conductivity, distributed impedance, Ohm's law relation, and transmission line model of both carbon nanotubes (CNTs) and solid material nanowires. It is shown that spatial dispersion results in an intrinsic (material-dependent) transmission-line capacitance. Spatial dispersion is numerically unimportant in metal nanowires, but leads to a... View full abstract»

• ### Neural-Network Modeling for 3-D Substructures Based on Spatial EM-Field Coupling in Finite-Element Method

Publication Year: 2011, Page(s):21 - 38
Cited by:  Papers (4)  |  Patents (3)
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This paper presents a new neural-network method to describe the electromagnetic (EM) behavior at the interface between the substructures from an internally decomposed EM structure. A set of neural networks is used to represent the EM behavior of the substructure as seen from the interface. This allows EM coupling between substructures to be effectively represented. The method is developed in a fin... View full abstract»

• ### Adaptive Sampling Algorithm for Macromodeling of Parameterized $S$ -Parameter Responses

Publication Year: 2011, Page(s):39 - 45
Cited by:  Papers (25)
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This paper presents a new adaptive sampling strategy for the parametric macromodeling of -parameter-based frequency responses. It can be linked directly with the simulator to determine up front a sparse set of data samples that characterize the design space. This approach limits the overall simulation and macromodeling time. The resulting sample distribution can be fed into any kind of macromodeli... View full abstract»

• ### A General Approach for Sensitivity Analysis of Distributed Interconnects in the Time Domain

Publication Year: 2011, Page(s):46 - 55
Cited by:  Papers (5)
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With the continually increasing operating frequencies, simulation and optimization for signal integrity in high-speed designs is becoming increasingly important. In this paper, a novel and generic method for sensitivity analysis of distributed interconnects is developed. Advantages of the proposed method are that it is independent of the macromodel used to represent the interconnects, and it does ... View full abstract»

• ### Efficient Implementation for 3-D Laguerre-Based Finite-Difference Time-Domain Method

Publication Year: 2011, Page(s):56 - 64
Cited by:  Papers (24)
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When the Laguerre-based finite-difference time-domain (FDTD) method is used for electromagnetic problems, a huge sparse matrix equation results, which is very expensive to solve. We previously introduced an efficient algorithm for implementing an unconditionally stable 2-D Laguerre-based FDTD method. We numerically verified that the efficient algorithm can save CPU time and memory storage greatly ... View full abstract»

• ### Linear Circuit Models for On-Chip Quantum Electrodynamics

Publication Year: 2011, Page(s):65 - 71
Cited by:  Papers (7)
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We present equivalent circuits that model the interaction of microwave resonators and quantum systems. The circuit models are derived from a general interaction Hamiltonian. Quantitative agreement between the simulated resonator transmission frequency, qubit Lamb shift, and experimental data will be shown. We demonstrate that simple circuit models, using only linear passive elements, can be very u... View full abstract»

• ### A Planar Magic-T Structure Using Substrate Integrated Circuits Concept and Its Mixer Applications

Publication Year: 2011, Page(s):72 - 79
Cited by:  Papers (17)
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In this paper, a planar 180 phase-reversal T-junction and a modified magic-T using substrate integrated waveguide (SIW) and slotline are proposed and developed for RF/microwave applications on the basis of the substrate integrated circuits concept. In this case, slotline is used to generate the odd-symmetric field pattern of the SIW in the phase-reverse T-junction. Measured results indicate that 0... View full abstract»

• ### Exact Synthesis and Implementation of New High-Order Wideband Marchand Baluns

Publication Year: 2011, Page(s):80 - 86
Cited by:  Papers (14)
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New ultra-wideband high-order Marchand baluns with one microstrip unbalanced port and two microstrip balanced ports are proposed in this paper. The proposed Marchand baluns are synthesized based on an -plane high-pass prototype using the Richards' transformation. The responses of the synthesized high-order Marchand baluns are exactly predicted at all real frequencies. All circuit elements are comm... View full abstract»

• ### Microstrip Branch-Line Couplers for Crossover Application

Publication Year: 2011, Page(s):87 - 92
Cited by:  Papers (47)
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The branch-line coupler may be redesigned for crossover application. The bandwidth of such a coupler can be extended by suitably incorporating additional sections into the composite design. Laboratory tests on microstrip prototypes have shown the return loss and isolation of the three- and four-section couplers to be better than 20 dB over bandwidths of 22% and 33%, respectively. The insertion los... View full abstract»

• ### Modeling the Effects of Interference Suppression Filters on Ultra-Wideband Pulses

Publication Year: 2011, Page(s):93 - 98
Cited by:  Papers (4)  |  Patents (2)
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In this paper, we study the effects of interference suppression filters (multiple stopbands) on ultra-wideband (UWB) short pulses. Multiple stopbands of the filter, which is placed in the receiver, affect the UWB pulse amplitude, pulsewidth, and ringing; resulting in reduced signal-to-noise ratio and degradation in receiver performance. An analytical method is proposed in this paper to model the e... View full abstract»

• ### A Distributed Dual-Band LC Oscillator Based on Mode Switching

Publication Year: 2011, Page(s):99 - 107
Cited by:  Papers (21)
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In this paper, we present a distributed dual-band LC oscillator suitable for low-phase-noise applications. It switches between the odd and even resonant modes of a fourth-order LC resonator. In contrast to other switched-resonator designs, the switches used for mode selection do not carry current, and therefore, do not affect the quality factor of the resonator, which leads to low phase noise. Ana... View full abstract»

• ### Broadband Differential Low-Noise Amplifier for Active Differential Arrays

Publication Year: 2011, Page(s):108 - 115
Cited by:  Papers (16)
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In this paper, differential low-noise amplifiers are presented as a very powerful solution for radio astronomy applications. A fully differential amplifier topology has been analyzed and implemented in microstrip technology with discrete surface mount components. The amplifier design is made for an active receiving dense antenna array. Thus, the differential amplifier source impedance is no longer... View full abstract»

• ### A 0.18-$mu{hbox {m}}$ Dual-Gate CMOS Device Modeling and Applications for RF Cascode Circuits

Publication Year: 2011, Page(s):116 - 124
Cited by:  Papers (3)
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A merged-diffusion dual-gate CMOS device model is presented in this paper. The proposed large-signal model consists of two intrinsic BSIM3v3 nonlinear models and parasitic components. The parasitic elements, including the substrate networks, the distributed resistances, and the inductances, are extracted from the measured S-parameters. In order to verify the model accuracy, a cascode configuration... View full abstract»

• ### Six-Port Gigabit Demodulator

Publication Year: 2011, Page(s):125 - 131
Cited by:  Papers (28)
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This paper presents measurement results for a six-port-based demodulator designed for a center frequency of 7.5 GHz and with a bandwidth of 1 GHz for operation in the ultra-wideband band. The demodulator includes the six-port correlator, diodes, and amplifiers needed to recover the baseband data. Measurement results show that the prototype supports data rates at 1.7 Gbit/s with bit-error rate if a... View full abstract»

• ### Differential Amplifier Characterization Using Mixed-Mode Scattering Parameters Obtained From True and Virtual Differential Measurements

Publication Year: 2011, Page(s):132 - 142
Cited by:  Papers (3)
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This paper examines the differences in large signal mixed-mode scattering parameter characterization of differential amplifiers arising from virtual and true differential probing. The analysis is carried out by means of differential gain compression curves obtained from exemplary amplifier test assemblies with variable common mode rejection ratio. Based on analytical derivations involving basic no... View full abstract»

• ### Efficiency Enhancement of Doherty Amplifier Through Mitigation of the Knee Voltage Effect

Publication Year: 2011, Page(s):143 - 152
Cited by:  Papers (45)  |  Patents (1)
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This paper presents an approach to maximize the efficiency of a Doherty power amplifier (PA) with the knee voltage effect. Since the carrier PA with , which is the usual matching impedance for a carrier PA at a low power region, does not reach to the saturated operation at the 6-dB back-off power level, the maximum efficiency could not be achieved. However, the carrier amplifier can be driven into... View full abstract»

• ### Modeling and Design Methodology of High-Efficiency Class-F and Class- ${hbox{F}}^{{hbox{-}1}}$ Power Amplifiers

Publication Year: 2011, Page(s):153 - 165
Cited by:  Papers (31)
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In this paper, efficiency-limiting physical constraint effects imposed on the knee voltage, along with a variation of the optimum load resistance, are investigated for highly efficient Class-F and Class- amplifiers. First, for an accurate analysis and comparison, new current waveform models are identified, and a realistic approach incorporated using a nonzero knee voltage and voltage-dependent non... View full abstract»

• ### Design and Performance of a 600–720-GHz Sideband-Separating Receiver Using ${hbox{AlO}}_{x}$ and AlN SIS Junctions

Publication Year: 2011, Page(s):166 - 177
Cited by:  Papers (13)  |  Patents (29)
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We present the design, modeling, construction, and characterization of a sideband separating heterodyne receiver that covers the frequency range from 600 to 720 GHz. The receiver has been constructed using waveguide technology in the split-block technique. The core of the mixer consists of a quadrature hybrid, two directional couplers to inject the local oscillator signal, two superconductor-insul... View full abstract»

• ### A Calibration Method for RF and Microwave Noise Sources

Publication Year: 2011, Page(s):178 - 187
Cited by:  Papers (9)
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Uncertainties in noise-figure and noise-parameter measurements depend to a large degree on the accuracy with which noise sources are calibrated. In some cases, the uncertainties are similar to measured quantities. This paper discusses a method for calibration of RF and microwave noise sources against a reference noise source. This method takes into account noise parameters of the receiver used for... View full abstract»

• ### A Compact Variable-Temperature Broadband Series-Resistor Calibration

Publication Year: 2011, Page(s):188 - 195
Cited by:  Papers (10)
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We present a broadband on-wafer calibration from 45 MHz to 40 GHz for variable temperature measurements, which requires three standards: a thru, reflect, and series resistor. At room temperature, the maximum error of this technique, compared to a benchmark nine-standard multiline thru-reflect-line (TRL) method, is comparable to the repeatability of the benchmark calibration. The series-resistor st... View full abstract»

Publication Year: 2011, Page(s):196 - 205
Cited by:  Papers (2)
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This paper presents an analysis of noise adding radiometers that includes the effects of flicker, or 1/f, noise which often limits radiometer performance. The 1/f noise processes within the detector are affected by the modulation of the detector voltage as a result of the injected noise power and cause the overall 1/f noise to increase. The functional dependence of the 1/f noise parameters on degr... View full abstract»

• ### Corrections to "Editorial"

Publication Year: 2011, Page(s): 206
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## 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