# IEEE Transactions on Microwave Theory and Techniques

## Filter Results

Displaying Results 1 - 25 of 32

Publication Year: 2008, Page(s):C1 - C4
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• ### IEEE Transactions on Microwave Theory and Techniques publication information

Publication Year: 2008, Page(s): C2
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• ### Effect of Process Mismatches on Integrated CMOS Phased Arrays Based on Multiphase Tuned Ring Oscillators

Publication Year: 2008, Page(s):1305 - 1315
Cited by:  Papers (4)
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Tuned ring oscillators are used to generate multiple phases of a sinusoid for a variety of applications including phased- array transceivers and clock and data recovery circuits. A variable-phase ring oscillator (VPRO) is presented that generates outputs with a controllable phase progression, enabling its use in a compact low-power single-chip phased-array transceiver architecture. The VPRO functi... View full abstract»

• ### Investigation of High-Accuracy Indoor 3-D Positioning Using UWB Technology

Publication Year: 2008, Page(s):1316 - 1330
Cited by:  Papers (87)  |  Patents (1)
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There are many challenges in building an ultra-wideband (UWB) indoor local positioning system for high-accuracy applications. These challenges include reduced accuracy due to multipath interference, sampling rate limitations, tag synchronization, and antenna phase-center variation. Each of these factors must be addressed to achieve millimeter or sub-millimeter accuracy. The developed system archit... View full abstract»

• ### Bandwidth Potential of Cascode HBT-Based TWAs as a Function of Transistor ${ f} _{max} /{ f} _{ T}$ Ratio

Publication Year: 2008, Page(s):1331 - 1337
Cited by:  Papers (7)
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The bandwidth potential of cascode HBT-based broadband amplifiers following the traveling-wave amplifier (TWA) concept is studied. An approximate expression for the gain of the circuit is derived, which is based on the transistor small-signal model and the artificial transmission-line parameters. In this way, a relation between the HBT cutoff frequencies fT and fmax and the 3... View full abstract»

• ### A 1-V 5-GHz CMOS Multiple Magnetic Feedback Receiver Front-End

Publication Year: 2008, Page(s):1338 - 1348
Cited by:  Papers (3)
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In this paper, a receiver front-end module operating at 5 GHz and suitable for low-voltage operation is presented. The design consists of a single amplifying transistor low-noise amplifier topology that utilizes multiple magnetic feedback in order to simultaneously achieve high gain and high reverse isolation. In addition, a mixer topology for optimum performance regarding gain, noise, and lineari... View full abstract»

• ### An Ultra-Compact CMOS Variable Phase Shifter for 2.4-GHz ISM Applications

Publication Year: 2008, Page(s):1349 - 1354
Cited by:  Papers (33)
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An ultra-compact monolithic microwave integrated circuit active variable phase shifter is proposed and implemented using CMOS technology. It is a reflective-type phase shifter consisting of a compact three-transistor active circulator and a second-order LC network. The use of an active inductor in the second-order LC network makes this phase shifter all active and ultra compact with a size of only... View full abstract»

• ### Improvement of Intermodulation Distortion Asymmetry Characteristics With Wideband Microwave Signals in High Power Amplifiers

Publication Year: 2008, Page(s):1355 - 1363
Cited by:  Papers (12)  |  Patents (2)
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This paper presents the improvement techniques of intermodulation-distortion asymmetries with wide carrier-spacing signals in L/S-band high power amplifiers. We proposed a novel circuit technique to directly connect LC series resonant circuits to the gate and drain electrodes of the transistor die in a package for baseband terminations with a wide frequency range. By applying this circuit techniqu... View full abstract»

• ### $Ka$-Band Low-Loss and High-Isolation Switch Design in 0.13-$mu{hbox {m}}$ CMOS

Publication Year: 2008, Page(s):1364 - 1371
Cited by:  Papers (48)
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This paper presents designs and measurements of Ka-band single-pole single-throw (SPST) and single-pole double-throw (SPDT) 0.13-CMOS switches. Designs based on series and shunt switches on low and high substrate resistance networks are presented. It is found that the shunt switch and the series switch with a high substrate resistance network have a lower insertion loss than a standard designs. Th... View full abstract»

• ### Six-Port Interferometric Technique for Accurate $W$ -Band Phase-Noise Measurements

Publication Year: 2008, Page(s):1372 - 1379
Cited by:  Papers (6)
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An innovative six-port (SP) phase-noise measurement technique for millimeter-wave high-power sources is proposed in this paper. Simulation results using a 94-GHz rectangular waveguide SP circuit model validates the measurement principle for both millimeter-wave oscillators and amplifiers. Phase-noise measurement results of a 100-W extended interaction Klystron amplifier are presented and discussed... View full abstract»

• ### A Submillimeter-Wave HEMT Amplifier Module With Integrated Waveguide Transitions Operating Above 300 GHz

Publication Year: 2008, Page(s):1380 - 1388
Cited by:  Papers (37)
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In this paper, we report on the first demonstration of monolithically integrated waveguide transitions in a submillimeter-wave monolithic integrated circuit (S-MMIC) amplifier module. We designed the module for a targeted frequency range of 300-350 GHz, using WR2.2 for the input and output waveguides. The waveguide module utilizes radial -plane transitions from S-MMIC to waveguide. We designed bac... View full abstract»

• ### 3-D Aspect in the Five-Port Technique for Zero-IF Receivers and a New Blind Calibration Method

Publication Year: 2008, Page(s):1389 - 1396
Cited by:  Papers (6)
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The five- or six-port circuit uses one or two additional outputs in comparison with classical homodyne demodulators. This paper demonstrates that the five- or six-port technique can take advantage of this particularity. The geometrical approach allows us to represent the 3-D aspect of the five-port technique. This study in space demonstrates the natural rejection of the even-order signal at the ou... View full abstract»

• ### A 2.45-GHz Near-Field RFID System With Passive On-Chip Antenna Tags

Publication Year: 2008, Page(s):1397 - 1404
Cited by:  Papers (37)
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The design of a 2.45-GHz near-field RF identification (RFID) system with passive on-chip antenna (OCA) tags is very challenging as the efficiency of RF power conversion is very low. It poses multidisciplinary research challenges such as ultra-low-power circuits design, semiconductor process technology, and integrated antenna design. This paper describes the designs of such an RFID system, the read... View full abstract»

• ### Novel Microwave Network for the Leaky-Wave Analysis of Evanescent Fields in Stub-Loaded Structures

Publication Year: 2008, Page(s):1405 - 1412
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In this paper, a new transverse equivalent network for the modal analysis of stub-loaded leaky-wave antennas is developed. The derived network is useful for the study of the radiation of evanescent fields that occurs when they reach the top aperture of the parallel-plate stub. This transverse network is based, for the first time, on a nonhybrid formulation of the constituent parallel-plates modes ... View full abstract»

• ### A Fast Procedure to Accurately Determine Leaky Modes in Multilayered Planar Dielectric Substrates

Publication Year: 2008, Page(s):1413 - 1422
Cited by:  Papers (13)
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Leaky modes of multilayered substrates play an important role in efficient numerical electromagnetic solvers. In this paper, the location of the propagation constants of the transverse electric and transverse magnetic leaky modes are determined in an efficient way for multilayered substrates with commensurable layer thicknesses. It is shown that, for all practical applications, accurate quasi-stat... View full abstract»

• ### Determining the Effective Constitutive Parameters of Finite Periodic Structures: Photonic Crystals and Metamaterials

Publication Year: 2008, Page(s):1423 - 1434
Cited by:  Papers (6)
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A novel approach to find the effective electric and magnetic parameters of finite periodic structures is proposed. The method uses the reflection coefficients at the interface between a homogenous half-space and the periodic structure of different thicknesses. The reflection data are then approximated by complex exponentials, from which one can deduce the wavenumber, and the effective electric and... View full abstract»

• ### Finite-Element Time-Domain Simulation of Electric Discharges

Publication Year: 2008, Page(s):1435 - 1439
Cited by:  Papers (5)
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A formulation to deal with materials having dispersive and nonlinear characteristics in the finite-element time-domain method is proposed. The approach is illustrated by an electric discharge simulation in a spark gap switch based on the collision plasma vector differential equation with a polarization current dependent resistivity. The simulated voltage response across the spark gap switch matche... View full abstract»

• ### Improved Finite-Difference Time-Domain Algorithm Based on Error Control for Lossy Materials

Publication Year: 2008, Page(s):1440 - 1445
Cited by:  Papers (1)
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This paper discusses the development of a reduced-error finite-difference time-domain algorithm, capable of handling conducting media in an efficient manner. Founded on a spatially extended stencil, the proposed scheme introduces a novel design procedure, whose basic idea is to enforce conditions of the continuous space to the discrete level. In this way, we derive reliable space-time models for 2... View full abstract»

• ### Fast Computation of Layered Medium Green's Functions of Multilayers and Lossy Media Using Fast All-Modes Method and Numerical Modified Steepest Descent Path Method

Publication Year: 2008, Page(s):1446 - 1454
Cited by:  Papers (16)
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A fast and accurate approach, based on the fast all-modes method (FAM) and the numerical modified steepest descent path method (NMSP), was previously used to calculate the spatial Green's function for a single-layer lossless dielectric medium over a perfect electric conductor. This paper successfully extends that approach to two new cases. The first is the multilayer case where the medium has an a... View full abstract»

• ### A Dual-Band Balun Using Partially Coupled Stepped-Impedance Coupled-Line Resonators

Publication Year: 2008, Page(s):1455 - 1460
Cited by:  Papers (8)
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In this paper, a recently proposed dual-band resonator structure consisting of a pair of partially coupled stepped-impedance lines is theoretically investigated. The new resonator configuration contains a number of attractive features for dual-band applications. A new type of dual-band balun that is constructed using a pair of such coupled stepped-impedance resonators is fully studied both theoret... View full abstract»

• ### A New Approach to the Realization of a Dual-Band Microstrip Filter With Very Wide Upper Stopband

Publication Year: 2008, Page(s):1461 - 1467
Cited by:  Papers (18)
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This paper presents the design of a new dual-band filter with very wide upper stopband. The proposed circuit offers a simple and compact structure with low insertion loss. Spurious suppression is achieved by using specially designed coupling and resonator sections. Moreover, a systematic analysis is applied to the proposed topology with closed-form design equations derived. For verification purpos... View full abstract»

• ### A Microstrip Bandpass Filter With Ultra-Wide Stopband

Publication Year: 2008, Page(s):1468 - 1472
Cited by:  Papers (20)  |  Patents (2)
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This paper develops a novel microstrip bandpass filter with ultra-wide stopband. With the assistance of open stubs and interdigital capacitors, a very wide stopband with a sufficient rejection level can be achieved easily. Detailed design and synthesis procedures are provided. Moreover, the electromagnetic simulator IE3D is used, and the prototype of the bandpass filter is fabricated and measured.... View full abstract»

• ### Eight-Way Substrate Integrated Waveguide Power Divider With Low Insertion Loss

Publication Year: 2008, Page(s):1473 - 1477
Cited by:  Papers (69)  |  Patents (3)
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We describe a compact radial cavity power divider based on the substrate integrated waveguide (SIW) technology in this paper. The equivalent-circuit model is used to analyze the multiport structure, and a design procedure is also established for the structure. An eight-way C-band SIW power divider with low insertion loss is designed, fabricated, and measured. Good agreement between simulated and m... View full abstract»

• ### Design of Conical Transmission Line Power Combiners Using Tapered Line Matching Sections

Publication Year: 2008, Page(s):1478 - 1484
Cited by:  Papers (22)  |  Patents (1)
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An axially symmetric power combiner, which utilizes a tapered conical impedance matching network to transform ten 50-Omega inputs to a central coaxial line over the X-band, is presented. The use of a conical line allows standard transverse electromagnetic design theory to be used, including tapered impedance matching networks. This, in turn, alleviates the problem of very low impedance levels at t... View full abstract»

• ### Evaluation of Measurement Uncertainties Caused by Common and Cross Modes in Differential Measurements Using Baluns

Publication Year: 2008, Page(s):1485 - 1492
Cited by:  Papers (3)
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Two-port vector network analyzers can be used for measuring differential circuits by integrating baluns. However, due to the imperfection of the baluns, measurement uncertainties occur even under the most accurate calibration conditions. These uncertainties are caused by the common and cross modes of the baluns and the device-under-test. This paper proposes a new algorithm, which evaluates these m... 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