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# IEEE Transactions on Microwave Theory and Techniques

## Issue 5  Part 1 • May 2010

This issue contains several parts.Go to:  Part 2

## Filter Results

Displaying Results 1 - 25 of 32

Publication Year: 2010, Page(s):C1 - C4
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• ### IEEE Transactions on Microwave Theory and Techniques publication information

Publication Year: 2010, Page(s): C2
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• ### Pulsed-IV Pulsed-RF Cold-FET Parasitic Extraction of Biased AlGaN/GaN HEMTs Using Large Signal Network Analyzer

Publication Year: 2010, Page(s):1077 - 1088
Cited by:  Papers (8)
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A new pulsed-IV pulsed-RF cold field-effect transistor (cold-FET) technique is presented to extract the parasitics of AlGaN/GaN HEMTs under various quiescent dc-biasing points. The measurement system implemented with a large signal network analyzer applies the technique of multiple recording to acquire pulsed-RF small-signal S-parameters with no loss of dynamic range as the pulse dut... View full abstract»

• ### A 44-GHz SiGe BiCMOS Phase-Shifting Sub-Harmonic Up-Converter for Phased-Array Transmitters

Publication Year: 2010, Page(s):1089 - 1099
Cited by:  Papers (7)
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A compact 44-GHz phase-shifting direct up-conversion transmitter for phased-array transmitters, based on a doubled local oscillator (LO) phase-shifting approach, is fabricated in a 0.18-??m silicon germanium BiCMOS process. The upconverter includes a frequency doubler, an LO phase shifter, double balanced mixers, and an output driver. The upconverter has a conversion gain of 18 dB and continuous 3... View full abstract»

• ### Investigation of the S-PIN Diodes for Silicon Monolithic Antennas With Reconfigurable Aperture

Publication Year: 2010, Page(s):1100 - 1106
Cited by:  Papers (2)
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Investigations of surface p-i-n (S-PIN) diodes developed for silicon monolithic antennas with reconfigurable aperture have been described. The main criteria for choosing a suitable substrate for the S-PIN diodes have been extensively discussed. Based on this analysis, it has been found that dedicated silicon-on-insulator (SOI) substrates meet the requirements of efficient and lossless wave propaga... View full abstract»

• ### Design of a 4 $times$ 10 Gb/s VCSEL Driver Using Asymmetric Emphasis Technique in 90-nm CMOS for Optical Interconnection

Publication Year: 2010, Page(s):1107 - 1115
Cited by:  Papers (12)  |  Patents (4)
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This paper describes the design and experimental results of a 4 × 10 Gb/s vertical-cavity surface-emitting laser (VCSEL) driver using the asymmetric emphasis technique. Conventional symmetric emphasis techniques can compensate for the influences of parasitic capacitances; however, they cannot compensate for the nonlinear effects of a VCSEL. To overcome this problem, an asymmetric emphasis tec... View full abstract»

• ### Efficiency Enhancement of Feedforward Amplifiers by Employing a Negative Group-Delay Circuit

Publication Year: 2010, Page(s):1116 - 1125
Cited by:  Papers (43)
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We will demonstrate an alternative topology for the feedforward amplifier. This amplifier does not use a delay element, thus providing an efficiency enhancement and a size reduction by employing a distributed-element negative group-delay circuit. The insertion loss of the delay element in the conventional feedforward amplifier seriously degrades the efficiency. Usually, a high-power coaxial cable ... View full abstract»

• ### A CMOS Broadband Low-Noise Mixer With Noise Cancellation

Publication Year: 2010, Page(s):1126 - 1132
Cited by:  Papers (36)
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This paper presents a broadband low-noise mixer in CMOS 0.13-??m technology that operates between 1-5.5 GHz. The mixer has a Gilbert cell configuration that employs broadband low-noise transconductors designed using the noise-cancelling technique used in low-noise amplifer designs. This method allows broadband input matching and without the use of inductors that are frequently required in low-nois... View full abstract»

• ### Low Phase-Noise Planar Oscillators Based on Low-Noise Active Resonators

Publication Year: 2010, Page(s):1133 - 1139
Cited by:  Papers (15)
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A very low phase-noise planar X -band oscillator employing an active resonator has been demonstrated. The high frequency selectivity of the active filter, used as the resonator, is the key factor in phase-noise reduction. A design procedure to achieve the resonator's optimum performance for low phase-noise applications is presented. In particular, the effect of the excess noise introduced b... View full abstract»

• ### Wideband IF-Integrated Terahertz HEB Mixers: Modeling and Characterization

Publication Year: 2010, Page(s):1140 - 1150
Cited by:  Papers (4)
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This paper presents a detailed study of the IF properties of phonon-cooled NbN hot electron bolometer (HEB) terahertz mixers and receivers, performed over the widest intermediate frequency range reported so far. First, a broadband technique is used to obtain the IF small-signal output impedance of HEB mixers using network analyzer measurements. The impedance is measured over an IF range of 300 kHz... View full abstract»

• ### A Millimeter-Wave Sub-Harmonic Self-Oscillating Mixer Using Dual-Mode Substrate Integrated Waveguide Cavity

Publication Year: 2010, Page(s):1151 - 1158
Cited by:  Papers (8)
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This paper presents a novel sub-harmonic self-oscillating mixer (SOM) topology that makes use of the transmission characteristics of two operating modes in a substrate integrated waveguide (SIW) cavity. The SOM circuit consists of a dual-mode SIW bandpass filter, a common source heterojunction field-effect transistor, and a low-pass filter. The fundamental mode ( H 101) of the SI... View full abstract»

• ### Dual-Band Impedance-Matching Networks Based on Split-Ring Resonators for Applications in RF Identification (RFID)

Publication Year: 2010, Page(s):1159 - 1166
Cited by:  Papers (26)
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This paper is focused on the design of dual-band impedance-matching networks of interest in RF identification (RFID) systems. By cascading an impedance-matching network between the chip and antenna, the performance of the RFID tags can be improved. The main aim of this study is to demonstrate the possibility of designing such networks by means of split-ring resonators coupled to microstrip transmi... View full abstract»

• ### Closed-Form Expressions for the Equivalent Circuit Model of Square-Waveguide T-Junctions and Its Application in Ortho-Mode Transducer Design

Publication Year: 2010, Page(s):1167 - 1174
Cited by:  Papers (5)
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In this paper, closed-form expressions for the equivalent circuit model of square-waveguide T-junctions are presented. The square-waveguide T-junction is first modeled as a generalized admittance matrix and then reduced to a general five-port network. It is theoretically seen that the general five-port network can be simplified as a combination of a two-port subnetwork and a three-port subnetwork ... View full abstract»

• ### The Barnes–Hut Hierarchical Center-of-Charge Approximation for Fast Capacitance Extraction in Multilayered Media

Publication Year: 2010, Page(s):1175 - 1188
Cited by:  Papers (6)
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The Barnes-Hut algorithm is widely used in astrophysics for solving large gravitational N -body problems using O(N logN) time and memory. This reduction in computational cost is achieved by a hierarchical application of the classical center-of-mass approximation. As both gravitational and electrostatic potentials are subject to a 1/R dependence, the Barnes-Hut al... View full abstract»

• ### Using the LU Recombination Method to Extend the Application of Circuit-Oriented Finite Element Methods to Arbitrarily Low Frequencies

Publication Year: 2010, Page(s):1189 - 1195
Cited by:  Papers (8)
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The circuit-oriented finite-element method (FEM) is a method that combines a finite-element field solver with a circuit analyzer and is suitable for analyzing electromagnetic field/circuit coupled problems. This paper describes a significant improvement to existing circuit-oriented FEMs that reduces the number of circuit elements and eliminates low-frequency stability problems. A modified LU recom... View full abstract»

• ### Computer Simulation of Temperature Distribution of Frozen Material Heated in a Microwave Oven

Publication Year: 2010, Page(s):1196 - 1204
Cited by:  Papers (5)
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In this study, the temperature distribution of a material (frozen tuna) that was heated in a commercial microwave oven is calculated by a coupled method using the finite-difference time-domain method, the semi-implicit method for pressure linked equations, the Monte Carlo method, and the radiative energy absorption distribution method. This method takes into consideration the melting heat during t... View full abstract»

• ### Multiresolution Channel-Select Filter With Ultrawide Frequency Coverage

Publication Year: 2010, Page(s):1205 - 1212
Cited by:  Papers (1)  |  Patents (1)
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A multiresolution channel select filter topology is proposed for implementing a digitally-tunable bandpass response with ultra-wideband tuning range. This filter is composed of a chain of bimodal filter stages with self-complementary periodic frequency response. The frequency response behavior of this filter, the effect of parasitics, and the nonlinearities are studied in detail. A four-stage impl... View full abstract»

• ### Compact Dual-Band Branch-Line and Rat-Race Couplers With Stepped-Impedance-Stub Lines

Publication Year: 2010, Page(s):1213 - 1221
Cited by:  Papers (72)
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This study constructs stepped-impedance-stub lines for a dual-band branch-line coupler design with improved design flexibility. The proposed structure demonstrates dual-band performance and a compact size due to additional stepped-impedance stubs to branches. The developed synthesis method has two degrees of freedom which can be exploited to miniaturize circuit size and/or replace impractical impe... View full abstract»

• ### A New Approach to the Synthesis of Microwave Lossy Filters

Publication Year: 2010, Page(s):1222 - 1229
Cited by:  Papers (12)
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In this paper, we first present a novel synthesis method based on an even- and odd-mode decomposition. This method is capable of synthesizing a network under very general hypotheses and is, therefore, suitable for lossy filter design. To exploit the increased flexibility of this new synthesis method over the traditional lossy design techniques, we then introduce a new approach to the design of los... View full abstract»

• ### Linear–Nonlinear Interaction and Passive Intermodulation Distortion

Publication Year: 2010, Page(s):1230 - 1237
Cited by:  Papers (7)
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This paper describes several consequences of a linear-nonlinear interaction that was recently found to be of importance in microwave circuits that produce passive intermodulation (PIM) distortion. This paper briefly discusses how this linear-nonlinear interaction operates in an example system. It then discusses how an understanding of the linear-nonlinear interaction allows us to distinguish betwe... View full abstract»

• ### On Passivity Characterization of Symmetric Rational Macromodels

Publication Year: 2010, Page(s):1238 - 1247
Cited by:  Papers (2)
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This paper provides a theoretical framework for passivity characterization of symmetric rational macromodels. These may be obtained for linear and time-invariant reciprocal structures if structural symmetry is preserved during the rational fitting stage of the macromodel generation. Standard Hamiltonian-based methods can be used to characterize any passivity violation of such macromodels. Recent d... View full abstract»

• ### Magnetic Metamaterials as 1-D Data Transfer Channels: An Application for Magneto-Inductive Waves

Publication Year: 2010, Page(s):1248 - 1256
Cited by:  Papers (30)
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Magneto-inductive waves are a form of propagation that only exists in certain types of magnetic metamaterials formed from inductively coupled resonant circuits. These waves are candidates for forming a contactless data channel between suitably designed devices. This paper reports on an investigation into the data carrying capacity of these novel channels in one dimension from both an analytical an... View full abstract»

• ### Dual-Band Impedance Transformer Using Two-Section Shunt Stubs

Publication Year: 2010, Page(s):1257 - 1263
Cited by:  Papers (46)
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This study presents a modified shunt-stub dual-band impedance transformer. The load impedances can be complex and unequal at two uncorrelated frequencies. The proposed transformer has two parts; each part is composed of a two-section transmission line. Similar to the single-stub matching network at a single frequency, a two-section transmission line is connected to the load and transforms the load... View full abstract»

• ### MEMS-Based 180$^{circ}$ Phase Switch for Differential Radiometers

Publication Year: 2010, Page(s):1264 - 1272
Cited by:  Papers (6)
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In this paper, a new uniplanar 180° phase switch suitable for space differential radiometers is proposed. It is based on two dc-contact-microelectromechanical system (MEMS) single-pole-double-throw switches that switch between two different back-to-back coplanar-to-slotline transitions. Since these transitions are multimodal structures, rigorous multimodal models are developed to analyze them... View full abstract»

• ### Automated Broadband High-Dynamic-Range Nonlinear Distortion Measurement System

Publication Year: 2010, Page(s):1273 - 1282
Cited by:  Papers (15)
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This paper presents an intermodulation distortion measurement system based on automated feedforward cancellation that achieves 113 dB of broadband spurious-free dynamic range for discrete tone separations down to 100 Hz. For 1-Hz tone separation, the dynamic range is 106 dB, limited by carrier phase noise. A single-tone cancellation formula is developed requiring only the power of the probing sign... 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