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# 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
| PDF (44 KB)
• ### On the Computation of Electromagnetic Dyadic Green's Function in Spherically Multilayered Media

Publication Year: 2011, Page(s):1433 - 1440
Cited by:  Papers (13)
| | PDF (775 KB) | HTML

The dyadic Green's function (DGF) method is an attractive approach for the calculation of electromagnetic scattering in spherically symmetric layered geometry. We investigate a recent formulation and reveal a problem that is associated with the nonconverging series that are employed for the calculation of the DGF in unbounded media. To overcome this deficiency, we introduce a new formulation that ... View full abstract»

• ### Gap Discontinuity in Microstrip Lines: An Accurate Semianalytical Formulation

Publication Year: 2011, Page(s):1441 - 1453
Cited by:  Papers (10)
| | PDF (955 KB) | HTML

A semianalytical full-wave formulation is used to analyze a narrow gap in a microstrip line. The analysis assumes that the length of the gap is small compared to the strip width, but allows for an arbitrarily high frequency. The formulation accounts for radiation from the gap into space and into surface waves. Based on this formulation, the scattering parameters of the gap are obtained along with ... View full abstract»

• ### Compact Wideband Equivalent-Circuit Model for Electrical Modeling of Through-Silicon Via

Publication Year: 2011, Page(s):1454 - 1460
Cited by:  Papers (47)  |  Patents (1)
| | PDF (714 KB) | HTML

This paper presents a compact wideband equivalent circuit model for electrical modeling of through-silicon vias (TSVs) in 3-D stacked integrated circuits and packaging. Rigorous closed form formulas for the resistance and inductance of TSVs are de rived from the magneto-quasi-static theory with a Fourier-Bessel expansion approach, whereas analytical formulas from static solutions are used to compu... View full abstract»

• ### Design of a Dual-Band Rotary Joint Operating in $X$- and $Ka$-Bands

Publication Year: 2011, Page(s):1461 - 1467
Cited by:  Papers (5)
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This paper illustrates the design guidelines and main features of a dual-channel rotary joint, operating in X- and Ka-bands. The core of the proposed solution is the double transducer between X and Ka rectangular waveguides and a nested coaxial waveguide, which shows very good performance in both bands. View full abstract»

• ### Improving the High-Frequency Performance of Coaxial-to-Microstrip Transitions

Publication Year: 2011, Page(s):1468 - 1477
Cited by:  Papers (8)  |  Patents (1)
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This paper presents a new design to improve the transmission characteristics of coaxial-to-microstrip transitions. A metallic ring is added to a conventional coaxial structure to serve as a buffer between a coaxial line and a microstrip line. The introduction of the metallic ring reduces the insertion loss of the transition caused by the sudden changes of the electromagnetic field distributions fr... View full abstract»

• ### Optimum Design of Asymmetrical Multisection Two-Way Power Dividers With Arbitrary Power Division and Impedance Matching

Publication Year: 2011, Page(s):1478 - 1490
Cited by:  Papers (34)
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A general analysis and design procedure is developed for the asymmetrical multisection power divider with arbitrary power division ratio and arbitrary specifications of input and output impedance matching over any desired frequency bandwidth. The even- and odd-mode analysis, which was previously applied to the design of multisection Gysel power dividers, required that the unequal power division ra... View full abstract»

• ### A Fundamental Limit on the Performance of Geometrically-Tuned Planar Resonators

Publication Year: 2011, Page(s):1491 - 1499
Cited by:  Papers (2)
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Geometric frequency tuning in planar electromagnetic resonators is common in many applications. It comes, however, at a penalty in the resonance quality, Q0. The literature traces the causes of such penalty often in terms of the shortcomings in the added elements and materials, which were used to achieve the tuning. In this paper, however, it is shown that another underlying sour... View full abstract»

• ### Filter Parameter Extraction for Triple-Band Composite Split-Ring Resonators and Filters

Publication Year: 2011, Page(s):1500 - 1508
Cited by:  Papers (27)
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A configuration of composite resonators consisting of three split-ring resonators is proposed to obtain a triple-band response with two transmission zeros between the passbands. Two new topologies are presented to design triple-band filters with controllable responses. A systematic filter design approach is presented based on a filter coupling model. The model is established to enable triple-band ... View full abstract»

• ### Compact Ultra-Wideband (UWB) Bandpass Filter With Ultra-Narrow Dual- and Quad-Notched Bands

Publication Year: 2011, Page(s):1509 - 1519
Cited by:  Papers (37)
| | PDF (1729 KB) | HTML

In this paper, compact ultra-wideband (UWB) bandpass filters with ultra-narrow dual- and quad-notched bands are proposed using the broadside-coupled microstrip/coplanar waveguide (CPW) structure. The multiple-modes UWB operation is obtained through the CPW detached-mode resonator (DMR) and broadside-coupled microstrip/CPW transition. To avoid the existing interferences such as the wireless local-a... View full abstract»

• ### A Comprehensive Study of High- $Q$ Island-Gate Varactors (IGVs) for CMOS Millimeter-Wave Applications

Publication Year: 2011, Page(s):1520 - 1528
Cited by:  Papers (7)
| | PDF (1035 KB) | HTML

This paper presents a comprehensive study on the high-Q island-gate varactor (IGV), which includes a comparison with the conventional multifinger varactors (MFVs) and analyses on the effect of structural variations on the varactor performance. The study shows that the IGV exhibits smaller Rs and larger Q factor compared to the MFV, while its capacitance tuning ratio is smaller. The effect of the d... View full abstract»

• ### Symmetric Offset Stack Balun in Standard 0.13-$mu{hbox {m}}$ CMOS Technology for Three Broadband and Low-Loss Balanced Passive Mixer Designs

Publication Year: 2011, Page(s):1529 - 1538
Cited by:  Papers (21)
| | PDF (2503 KB) | HTML

This paper presents symmetric offset stack Marchand single and dual baluns that are designed, analyzed, and implemented in a 0.18-μm CMOS process to verify the feasibility. Both single and dual baluns achieve measured bandwidths (BWs) of over 110% and 90%, and insertion losses of less than 4.4 and 7.4 dB at 38 GHz. The amplitude imbalance and phase imbalance of single and dual baluns are le... View full abstract»

• ### Design and Analysis of a Cascode Bipolar Low-Noise Amplifier With Capacitive Shunt Feedback Under Power-Constraint

Publication Year: 2011, Page(s):1539 - 1551
Cited by:  Papers (10)
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A cascode bipolar low-noise amplifier (LNA) with capacitive shunt feedback has been developed to present a solution for simultaneous noise and power match when the real part of the optimum source impedance is not 50 Ω in order to keep high current density under power constraint. The proposed LNA also has the capability for the simultaneous improvement of noise figure (NF) and linearity. In ... View full abstract»

• ### CMOS Programmable Gain Distributed Amplifier With 0.5-dB Gain Steps

Publication Year: 2011, Page(s):1552 - 1559
Cited by:  Papers (10)
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A new CMOS programmable gain distributed amplifier with 0.5-dB gain steps is fabricated in a 130-nm process. The circuit is designed to demonstrate broadband (>;1 decade) programmable gains with excellent matching and high isolation for use in RF integrated-circuit testing. The measured slope of S21 loss is approximately 3 dB/decade over frequencies from 0.8 to 9 GHz where inp... View full abstract»

• ### Automatic Hardware Reconfiguration for Current Reduction at Low Power in RFIC PAs

Publication Year: 2011, Page(s):1560 - 1570
Cited by:  Papers (4)
| | PDF (1881 KB) | HTML

This paper presents a novel hardware reconfiguration technique implemented in a dual integrated-circuit (IC) GaAs HBT power amplifier (PA) design and demonstrates reduced current and improved efficiency at low power. The method automatically reconfigures the hardware of an RF IC PA over a given power transmission. Hardware interfacing and synchronization from outside the PA is minimized, and autom... View full abstract»

• ### Effect of the Input and Output Impedance on Amplifier Large-Signal Noise Performances

Publication Year: 2011, Page(s):1571 - 1578
Cited by:  Papers (4)
| | PDF (1460 KB) | HTML

The effect of input and output amplifier impedance on the amplifier amplitude-modulation (AM) and phase-modulation (PM) noise, as well as on noise figure (NF) is studied in linear and nonlinear regimes. Simulations and measurements performed on different implemented amplifier prototypes corroborate that the behavior of the amplifier AM, PM, and effective NF levels in large-signal conditions depend... View full abstract»

• ### High-Efficiency Class E/F Lumped and Transmission-Line Power Amplifiers

Publication Year: 2011, Page(s):1579 - 1588
Cited by:  Papers (21)  |  Patents (2)
| | PDF (792 KB) | HTML

The theoretical analysis of a single-ended Class E/F n mode with explicit derivation of the idealized optimum voltage and current waveforms and load-network parameters with their verification by time- and frequency-domain simulations for a particular case of Class E/F3 mode with a 50% duty cycle are presented. The ideal collector voltage and current waveforms for driving signals ... View full abstract»

• ### A Zero-Voltage-Switching Contour-Based Power Amplifier With Minimal Efficiency Degradation Under Back-Off

Publication Year: 2011, Page(s):1589 - 1598
Cited by:  Papers (14)  |  Patents (4)
| | PDF (1009 KB) | HTML

A switching power amplifier (PA) architecture that offers up to 13 dB of output power back-off without any drain efficiency degradation is presented. The proposed zero-voltage-switching (ZVS) contour-based PA employs a series class-E PA in conjunction with duty cycle modulation and a proposed tunable impedance transformation network. So-called ZVS conditions that ensure ideally 100% drain efficien... View full abstract»

• ### A Wideband Transformer-Coupled CMOS Power Amplifier for $X$-Band Multifunction Chips

Publication Year: 2011, Page(s):1599 - 1609
Cited by:  Papers (32)
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This paper presents a wideband transformer-coupled CMOS power amplifier (PA). On-chip transmission-line transformers are used as key components of matching networks at output, input, and interstage. The wideband on-chip transformer is harnessed without any additional inductive devices so that a wideband power characteristic can be achieved. The PA is fabricated using a 0.18-μm CMOS process.... View full abstract»

• ### High-Efficiency Envelope-Tracking Transmitter With Optimized Class-${hbox{F}}^{-1}$ Amplifier and 2-bit Envelope Amplifier for 3G LTE Base Station

Publication Year: 2011, Page(s):1610 - 1621
Cited by:  Papers (13)  |  Patents (1)
| | PDF (2113 KB) | HTML

In this paper, a high-efficiency envelope-tracking (ET) transmitter incorporating a novel efficiency-boosting function is proposed and implemented. An inverse Class-F power amplifier is utilized and optimized using the proposed output loading condition, which enhances its efficiency at the high probability region. This matching network can be conveniently implemented by controlling the nonlinear c... View full abstract»

• ### Increased Group-Delay Slope Loop System for Enhanced-Resolution Analog Signal Processing

Publication Year: 2011, Page(s):1622 - 1628
Cited by:  Papers (28)
| | PDF (1021 KB) | HTML

A novel increased group-delay slope loop scheme is proposed to enhance the time-frequency resolution of dispersive delay structure (DDS) components for microwave analog signal processing systems. In this scheme, the signal at the output of the DDS is regenerated by an amplifier and reinjected via a nondispersive delay line toward its input along a loop. At each pass across the DDS, the effective g... View full abstract»

• ### A 0.6-V 0.33-mW 5.5-GHz Receiver Front-End Using Resonator Coupling Technique

Publication Year: 2011, Page(s):1629 - 1638
Cited by:  Papers (15)  |  Patents (2)
| | PDF (1195 KB) | HTML

In this study, a low-power and low-voltage 5.5-GHz receiver front-end circuit is designed using a resonator coupling technique. An on-chip transformer combined with the parasitic capacitances from a low-noise amplifier (LNA), a mixer, and the transformer itself comprises two coupled resonators of the resonator coupling network (RCN). The RCN functions as a balun, and couples energy from the LNA to... View full abstract»

• ### A 0.13-$mu{hbox {m}}$ 1-GS/s CMOS Discrete-Time FFT Processor for Ultra-Wideband OFDM Wireless Receivers

Publication Year: 2011, Page(s):1639 - 1650
Cited by:  Papers (5)  |  Patents (3)
| | PDF (1254 KB) | HTML

A discrete-time (DT) fast Fourier transform (FFT) processor is presented as an architectural approach to Fourier transform processing multigigahertz of spectral bandwidth. The processor is considered with the specific application of demodulating orthogonal frequency-division multiplexing (OFDM) modulation. The processor enables increased receiver linearity beyond that which is typically limited by... View full abstract»

• ### High-Resolution Flicker-Noise-Free Frequency Measurements of Weak Microwave Signals

Publication Year: 2011, Page(s):1651 - 1657
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Amplification is usually necessary when measuring the frequency instability of microwave signals. In this work, we develop a flicker-noise-free frequency measurement system based on a common or shared amplifier. First, we show that correlated flicker phase noise can be cancelled in such a system. We then compare the new system with the conventional system by simultaneously measuring the beat frequ... 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