# IEEE Transactions on Microwave Theory and Techniques

## Filter Results

Displaying Results 1 - 25 of 32

Publication Year: 2009, Page(s):C1 - C4
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• ### IEEE Transactions on Microwave Theory and Techniques publication information

Publication Year: 2009, Page(s): C2
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• ### Analysis of Series-Connected Discrete Josephson Transmission Line

Publication Year: 2009, Page(s):1865 - 1873
Cited by:  Papers (12)
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Employing a generalized resistive-capacitive shunted junction model for Josephson junctions (JJs), the nonlinear wave propagation in the series-connected discrete Josephson transmission line (DJTL) is investigated. A DJTL consists of a finite number of unit cells, each including a segment of superconducting transmission line with a single array stack, or generally a block including an N ide... View full abstract»

• ### A Programmable Lens-Array Antenna With Monolithically Integrated MEMS Switches

Publication Year: 2009, Page(s):1874 - 1884
Cited by:  Papers (49)
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This paper describes a reconfigurable millimeter-wave lens-array antenna based on monolithically integrated microelectromechanical systems (MEMS) switches. This device is constructed as a planar array of 2-bit programmable MEMS antenna-filter-antenna (AFA) unit cells that are used to provide a 1-D programmable ldquoaperture transfer functionrdquo between the input and output wavefronts. The fully ... View full abstract»

• ### Analysis and Compensation of Phase Variations Versus Gain in Amplifiers Verified by SiGe HBT Cascode RFIC

Publication Year: 2009, Page(s):1885 - 1894
Cited by:  Papers (23)
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The transmission phase variations versus gain in common emitter and common base amplifiers are analyzed revealing that these stages can be tuned to yield opposite phase characteristics versus gain. By cascading these two stages, e.g., on the basis of a cascode, and optimizing added feedback elements, it is possible to compensate these phase variations. A universal analysis based on bipolar transis... View full abstract»

• ### A 40-GHz Low-Noise Amplifier With a Positive-Feedback Network in 0.18-$mu{hbox{m}}$ CMOS

Publication Year: 2009, Page(s):1895 - 1902
Cited by:  Papers (27)  |  Patents (2)
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A novel circuit topology for a CMOS millimeter-wave low-noise amplifier (LNA) is presented in this paper. By adopting a positive-feedback network at the common-gate transistor of the input cascode stage, the small-signal gain can be effectively boosted, facilitating circuit operations at the higher frequency bands. In addition, LC ladders are utilized as the inter-stage matching for the cas... View full abstract»

• ### A 22–29-GHz UWB Pulse-Radar Receiver Front-End in 0.18-$mu{hbox{m}}$ CMOS

Publication Year: 2009, Page(s):1903 - 1914
Cited by:  Papers (38)
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The design of a CMOS 22-29-GHz pulse-radar receiver (RX) front-end for ultra-wideband automotive radar sensors is presented. The chip includes a low-noise amplifier, in-phase/quadrature mixers, a quadrature voltage-controlled oscillator (QVCO), pulse formers, and baseband variable-gain amplifiers. Fabricated in a 0.18-mum CMOS process, the RX front-end chip occupies a die area of 3 mm2.... View full abstract»

• ### CMOS Active Inductor Linearity Improvement Using Feed-Forward Current Source Technique

Publication Year: 2009, Page(s):1915 - 1924
Cited by:  Papers (14)
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MOSFET drain current second-order nonlinearity has a significant impact on the linearity of current regulated CMOS active inductors. It tends to compress MOSFET transconductance (g m) by generating excess dc current (I EX) in the channel, which is a function of incoming input signal amplitude. This generated excess dc current can change the original dc operating... View full abstract»

• ### A 90-W Peak Power GaN Outphasing Amplifier With Optimum Input Signal Conditioning

Publication Year: 2009, Page(s):1925 - 1935
Cited by:  Papers (64)  |  Patents (22)
| |PDF (1161 KB) | HTML

A 90-W peak-power 2.14-GHz improved GaN outphasing amplifier with 50.5% average efficiency for wideband code division multiple access (W-CDMA) signals is presented. Independent control of the branch amplifiers by two in-phase/quadrature modulators enables optimum outphasing and input power leveling, yielding significant improvements in gain, efficiency, and linearity. In deep-power backoff operati... View full abstract»

• ### Theory and Experimental Results of a Class F AB-C Doherty Power Amplifier

Publication Year: 2009, Page(s):1936 - 1947
Cited by:  Papers (31)
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The aim of this paper is to present a closed-form formulation suitable for a direct computer-aided design synthesis of a Doherty amplifier employing a Class F design strategy for the Main (or Carrier) device. For this purpose, starting from a simplified model for the adopted active devices, the behavioral analysis of the Class F Doherty amplifier is carried out as a function of the input signal. A... View full abstract»

• ### Design of 24-GHz 0.8-V 1.51-mW Coupling Current-Mode Injection-Locked Frequency Divider With Wide Locking Range

Publication Year: 2009, Page(s):1948 - 1958
Cited by:  Papers (20)
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A 0.8-V CMOS coupling current-mode injection-locked frequency divider (CCMILFD) with 19.5% locking range and a current-injection current-mode logic (CICML) frequency divider have been designed and fabricated using 0.13-mum 1p8m CMOS technology. In the proposed CCMILFD, the current-mode technique to minimize the loss of input signals and the coupling circuit to enlarge the phase response have been ... View full abstract»

• ### Low Phase-Noise Planar Oscillators Employing Elliptic-Response Bandpass Filters

Publication Year: 2009, Page(s):1959 - 1965
Cited by:  Papers (30)
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In this paper, a low phase-noise planar oscillator employing an elliptic bandpass filter as a frequency stabilization element within its feedback loop is presented. The oscillator phase noise is significantly reduced by taking advantage of the group-delay peaks formed at the passband edges of the elliptic filter. A filter optimization technique for low phase-noise oscillator designs is introduced ... View full abstract»

• ### Analysis and Design of Reduced-Size Marchand Rat-Race Hybrid for Millimeter-Wave Compact Balanced Mixers in 130-nm CMOS Process

Publication Year: 2009, Page(s):1966 - 1977
Cited by:  Papers (17)
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The analysis and design flow for reduced-size Marchand rat-race hybrids are presented in this paper. A simplified single-to-differential mode is used to analyze the Marchand balun, and the methodology to reduce the size of Marchand balun is developed. The 60-GHz CMOS singly balanced gate mixer and diode mixer using the reduced-size Marchand rat-race hybrid are implemented to verify the design meth... View full abstract»

• ### A 5-GHz CMOS Type-II PLL With Low $K_{rm VCO}$ and Extended Fine-Tuning Range

Publication Year: 2009, Page(s):1978 - 1988
Cited by:  Papers (8)
| |PDF (925 KB) | HTML

A 5-GHz dual-path integer-N Type-II phase-locked loop (PLL) uses an LC voltage-controlled oscillator and softly switched varactors in an overlapped digitally controlled integral path to allow a large fine-tuning range of approximately 160 MHz while realizing a low susceptibility to noise and spurs by using a low K VCO of 3.2 MHz/V. The reference spur level is less t... View full abstract»

• ### Analysis of a Post Discontinuity in an Oversized Circular Waveguide

Publication Year: 2009, Page(s):1989 - 1995
Cited by:  Papers (2)
| |PDF (1306 KB) | HTML

This paper presents the analysis of scattering characteristics of a radially directed thin post in a circular waveguide using the method of moments. Electric type dyadic Green's function has been used to compute the scattered field in a circular waveguide considering variation of current only in the axial direction of the post. Simulated data on return loss and power coupling in the dominant mode ... View full abstract»

• ### Characterization of the Propagation Properties of the Half-Mode Substrate Integrated Waveguide

Publication Year: 2009, Page(s):1996 - 2004
Cited by:  Papers (126)
| |PDF (909 KB) | HTML

The propagation properties of the half-mode substrate integrated waveguide (HMSIW) are studied theoretically and experimentally in this paper. Two equivalent models of the HMSIW are introduced. With the first model, equations are derived to approximate the field distribution inside and outside the HMSIW. Using the second model, an approximate closed-form expression is deduced for calculating the e... View full abstract»

• ### Implicit Element Clustering for Tetrahedral Transmission-Line Modeling (TLM)

Publication Year: 2009, Page(s):2005 - 2014
Cited by:  Papers (9)
| |PDF (1359 KB) | HTML

Time-domain electromagnetic simulations employing unstructured tetrahedral meshes can be sensitive to local mesh characteristics. In particular, the maximum permissible time step for stable operation can be unacceptably small. In this paper, a cell clustering technique is described for the transmission line modeling algorithm that reduces the sensitivity to local mesh characteristics and permits s... View full abstract»

• ### A 3-D Radial Point Interpolation Method for Meshless Time-Domain Modeling

Publication Year: 2009, Page(s):2015 - 2020
Cited by:  Papers (56)
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In this paper, the radial point interpolation method, one of the meshless numerical techniques that has recently emerged in the area of computational electromagnetics, is extended to three dimensions for time-domain electromagnetic modeling. Its capabilities of conformal and multiscale modeling of arbitrary geometries over conventional grid-based numerical techniques are numerically validated and ... View full abstract»

• ### A Linear-Time Complex-Valued Eigenvalue Solver for Full-Wave Analysis of Large-Scale On-Chip Interconnect Structures

Publication Year: 2009, Page(s):2021 - 2029
Cited by:  Papers (5)
| |PDF (985 KB) | HTML

This paper proposes a linear-time complex-valued eigenvalue solver for solving large-scale on-chip interconnect problems. The fast eigenvalue solution is achieved by eigenvalue clustering, fast system reduction with negligible computational cost, and fast linear-time solution of the reduced system. Numerical and experimental results are presented to demonstrate the accuracy and efficiency of the p... View full abstract»

• ### Incorporation of Multiport Lumped Networks Into the Hybrid Time-Domain Finite-Element Analysis

Publication Year: 2009, Page(s):2030 - 2037
Cited by:  Papers (18)
| |PDF (986 KB) | HTML

A systematic and efficient algorithm is presented for incorporating multiport lumped networks in terms of admittance matrices into a hybrid field-circuit solver based on the extended time-domain finite-element method. The Laplace-domain admittance matrices are cast into the time-domain stepping equations for port voltages and currents to form a lumped-network subsystem, which is then interfaced wi... View full abstract»

• ### RF Design, Power Handling, and Hot Switching of Waveguide Water-Based Absorptive Switches

Publication Year: 2009, Page(s):2038 - 2046
Cited by:  Papers (3)
| |PDF (1421 KB) | HTML

This paper presents the first complete water-based waveguide absorptive switch from 25-40 GHz integrated with commercially available micropumps. The design exploits the absorptive properties of water in the microwave and millimeter-wave bands along with innovative techniques to achieve an optimized performance in both switching states. Besides its static RF performance, the hot-switching response ... View full abstract»

• ### Design and Modeling of a Stopband-Enhanced EBG Structure Using Ground Surface Perturbation Lattice for Power/Ground Noise Suppression

Publication Year: 2009, Page(s):2047 - 2054
Cited by:  Papers (34)
| |PDF (1274 KB) | HTML

Based on the ground surface perturbation concept, a novel stopband-enhanced electromagnetic-bandgap (EBG) structure has been proposed to suppress the power/ground noise on a three-layer package. This structure consists of a coplanar periodic pattern on the top layer, a ground plane on the third layer, and a ground surface perturbation lattice on the second layer with eight vias connecting to the g... View full abstract»

• ### Broadband Lumped-Element Integrated $N$-Way Power Dividers for Voltage Standards

Publication Year: 2009, Page(s):2055 - 2063
Cited by:  Papers (23)
| |PDF (1664 KB) | HTML

This paper presents a monolithically integrated broadband lumped-element Wilkinson power divider centered at 20 GHz, which was designed and fabricated to uniformly distribute power to arrays of Josephson junctions (JJs) for superconducting voltage standards. This solution achieves a fourfold decrease in chip area, and a twofold increase in bandwidth (BW) when compared to the previous narrowband di... View full abstract»

• ### Optimum Design of Wideband Compensated and Uncompensated Marchand Baluns With Step Transformers

Publication Year: 2009, Page(s):2064 - 2071
Cited by:  Papers (7)
| |PDF (844 KB) | HTML

This paper presents a design approach for wideband compensated and uncompensated Marchand baluns with stepped-impedance transformers. In order to obtain an equal-ripple bandpass response, conventional Chebyshev polynomials are modified to compensate the effect of the transfer function's dc poles. Unlike the available microwave filter design approaches, which usually require redundant elements, thi... View full abstract»

• ### Physics-Based Via and Trace Models for Efficient Link Simulation on Multilayer Structures Up to 40 GHz

Publication Year: 2009, Page(s):2072 - 2083
Cited by:  Papers (97)  |  Patents (1)
| |PDF (2301 KB) | HTML

Analytical models for vias and traces are presented for simulation of multilayer interconnects at the package and printed circuit board levels. Vias are modeled using an analytical formulation for the parallel-plate impedance and capacitive elements, whereas the trace-via transitions are described by modal decomposition. It is shown that the models can be applied to efficiently simulate a wide ran... 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..

Full Aims & Scope

## Meet Our Editors

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

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