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# IEEE Transactions on Microwave Theory and Techniques

## Filter Results

Displaying Results 1 - 25 of 34

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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• ### Novel Design of a 2.5-GHz Fully Integrated CMOS Butler Matrix for Smart-Antenna Systems

Publication Year: 2008, Page(s):1757 - 1763
Cited by:  Papers (22)
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This paper presents a novel design of monolithic 2.5-GHz 4times4 Butler matrix in 0.18-mum CMOS technology. To achieve a full integration of smart antenna system monolithically, the proposed Butler matrix is designed with the phase-compensated transformer-based quadrature couplers and reflection-type phase shifters. The measurements show an accurate phase distribution of 45plusmn3deg, 135 plusmn 4... View full abstract»

• ### Phase-Conjugated Arrays Using Low Conversion-Loss Resistive Phase-Conjugating Mixers and Stub-Loaded Patch Antennas

Publication Year: 2008, Page(s):1764 - 1773
Cited by:  Papers (8)
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A 1-D four-element and 2-D eight-element phase-conjugated retrodirective arrays employing low conversion-loss resistive field-effect transistor mixers and stub-loaded patch elements are proposed. The mixer, systematically designed using a multi- harmonic loading technique, offers a low 5.2-dB conversion loss at a 4.5-dBm local oscillator power level. The stub-loaded patch element is a square patch... View full abstract»

• ### A 5.2-GHz CMOS T/R Switch for Ultra-Low-Voltage Operations

Publication Year: 2008, Page(s):1774 - 1782
Cited by:  Papers (13)
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A novel CMOS transmit/receive (T/R) switch suitable for ultra-low-voltage operations is presented in this paper. Due to the use of resonators in the receiving and transmitting paths, enhanced performance in terms of insertion losses and isolation can be achieved. In addition, the forward-body-bias and body-floating techniques are also introduced to minimize the on-resistance of the MOSFETs at a re... View full abstract»

• ### Integrated Multilayered On-Chip Inductors for Compact CMOS RFICs and Their Use in a Miniature Distributed Low-Noise-Amplifier Design for Ultra-Wideband Applications

Publication Year: 2008, Page(s):1783 - 1789
Cited by:  Papers (10)
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A novel multilayered vertically integrated inductor structure is developed for miniature CMOS RF integrated circuits, and its properties are investigated. The effect of mutual inductance both within and between adjacent multilayer inductors is also studied. A distributed low noise amplifier is designed by incorporating this novel inductor structure in a standard JAZZ 0.18-mum RF/mixed signal CMOS ... View full abstract»

Publication Year: 2008, Page(s):1790 - 1796
Cited by:  Papers (23)
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A new configuration is proposed for an active balun, which uses a cascode and cascade pair with the shared input transistor. It is designed in the IBM 8HP 130-nm BiCMOS process, which operates over a broad bandwidth up to 17 GHz where the imbalance of the differential output is less than 1.8 dB in amplitude and less then 10 in phase, over the input's dynamic range of -25-5 dBm, under the dc power ... View full abstract»

• ### Improvements in the Noise Theory of the MMIC Distributed Amplifiers

Publication Year: 2008, Page(s):1797 - 1806
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Exact and simple expressions have been obtained for the intrinsic noise figure of monolithic microwave integrated circuit distributed amplifiers (DAs). The method has been applied on both MESFET and HBT DAs. It has been shown that the complexity of the obtained formulas is much less than that of the previously published literature. The results of the new theory are then compared with that of the p... View full abstract»

• ### Gain-Enhancement Techniques for CMOS Folded Cascode LNAs at Low-Voltage Operations

Publication Year: 2008, Page(s):1807 - 1816
Cited by:  Papers (38)
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In this paper, gain-enhancement techniques suitable for folded cascode low-noise amplifiers (LNAs) at low-voltage operations are presented. By employing a forward bias and a capacitive divider at the body of the MOSFETs, the LNA circuit can operate at a reduced supply voltage while maintaining an enhanced gain due to suppression of the negative impact of the body transconductance. In addition, G View full abstract»

• ### ESD-Protected Wideband CMOS LNAs Using Modified Resistive Feedback Techniques With Chip-on-Board Packaging

Publication Year: 2008, Page(s):1817 - 1826
Cited by:  Papers (43)  |  Patents (3)
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A novel modified resistive feedback structure for designing wideband low-noise amplifiers (LNAs) is proposed and demonstrated in this paper. Techniques including feedback through a source follower, an R-C feedback network, a gate peaking inductor inside the feedback loop, and neutralization capacitors are used. Bond-wire inductors and electrostatic devices (ESDs) are co-designed to improve ... View full abstract»

• ### An AlGaN/GaN HEMT-Based Microstrip MMIC Process for Advanced Transceiver Design

Publication Year: 2008, Page(s):1827 - 1833
Cited by:  Papers (39)
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A MMIC process in AlGaN/GaN technology for advanced transceiver design has been developed. The process is based on microstrip technology with a complete model library of passive elements and AlGaN/GaN HEMTs. The transistor technology in this process is suitable for both power and low noise design, demonstrated with a power density of 5 W/mm, and an NFmin of 1.4 dB at X-band. Process sta... View full abstract»

• ### Injection Locking in Concurrent Dual-Frequency Oscillators

Publication Year: 2008, Page(s):1834 - 1845
Cited by:  Papers (9)
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In a separate paper, the authors show that a nonlinear active core with a fourth-order resonator can generate two stable independent frequencies simultaneously. In this paper, the effect of injecting two frequencies into such a concurrent dual-frequency oscillator is analyzed and experimentally verified. It is shown that, for weak injection, the effect of injection at one frequency is decoupled fr... View full abstract»

• ### Concurrent Dual-Frequency Oscillators and Phase-Locked Loops

Publication Year: 2008, Page(s):1846 - 1860
Cited by:  Papers (11)
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A dual-frequency oscillator employing a fourth-order tank is shown to have the ability to generate simultaneous oscillations at two frequencies. A nonlinear analysis to determine the steady-state and transient behavior of this oscillator is presented. Further, the phase-noise expression for the dual-frequency oscillator is derived and compared with that of a single-frequency oscillator. A dual-loo... View full abstract»

• ### Dual-Band Adjustable and Reactive I/Q Generator With Constant Resistance for Down- and Up-Converters

Publication Year: 2008, Page(s):1861 - 1868
Cited by:  Papers (6)
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Adjustable and reactive in-phase/quadrature (I/Q) generators with constant resistance are proposed for the first time in this paper with the properties of low loss, dual-band implementation, and high quadrature accuracy. The quadrature phase property and input matching of the I/Q generator can be achieved at all frequencies simultaneously by the constant-resistance I/Q generator. However, the magn... View full abstract»

• ### Design and Analysis of CMOS Subharmonic Injection-Locked Frequency Triplers

Publication Year: 2008, Page(s):1869 - 1878
Cited by:  Papers (46)
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K- and V-band CMOS differential subharmonic injection-locked frequency triplers (ILFTs) are proposed, analyzed, and designed. Based on the proposed ILFT structure, models for the injection-locking range and the output phase noise are developed. A K-band ILFT is designed and fabricated using 0.18-m standard CMOS technology. The measured injection-locking range is 1092 MHz with a dc power consumptio... View full abstract»

• ### A Silicon Monolithic Phase-Inverter Rat-Race Coupler Using Spiral Coplanar Striplines and Its Application in a Broadband Gilbert Mixer

Publication Year: 2008, Page(s):1879 - 1888
Cited by:  Papers (11)
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This paper realized a broadband uniplanar phase-inverter rat-race coupler using a standard silicon process, and then analyzed this coupler under a lossy condition. A phase inverter is employed in this coupler, not only to extend the operation bandwidth, but also to generate balanced outputs by providing equal lossy paths, while symmetrical spiral-shaped coplanar striplines (CPSs) are also utilized... View full abstract»

• ### A Planar Compatible Traveling-Wave Waveguide-Based Power Divider/Combiner

Publication Year: 2008, Page(s):1889 - 1898
Cited by:  Papers (642)  |  Patents (1)
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The operation of a planar compatible traveling-wave power divider and combiner structure is presented. Design guidelines of the scalable structure are presented as are simulated and measured results of two- and four-way devices at -band frequencies. A transmission line model of the divider/combiner is presented to provide additional insight into its operation. The measured 15-dB return-loss bandwi... View full abstract»

• ### A High-Power $Ka$-Band (31–36 GHz) Solid-State Amplifier Based on Low-Loss Corporate Waveguide Combining

Publication Year: 2008, Page(s):1899 - 1908
Cited by:  Papers (35)
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A method of using low-loss waveguide septum combiners is developed into a high-power -band (31-36 GHz) amplifier producing 50 W at 33 GHz (Ka-band) using 32 low-power (>2 W) solid-state amplifier modules. By using low-loss waveguide combining and a packaged monolithic microwave integrated circuit with a low-loss microstrip-to-waveguide launcher, the output loss is minimized, allowing for the ov... View full abstract»

• ### Eigenfrequencies of a Truncated Conical Resonator via the Classical and Wentzel–Kramers–Brillouin Methods

Publication Year: 2008, Page(s):1909 - 1916
Cited by:  Papers (4)
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The eigenfrequencies within a truncated conical cavity resonator have similarities to the eigenfrequencies within both the cylindrical and spherical cavity resonators. This paper first find the family of eigenfrequencies of the truncated conical cavity resonator by solving the classical boundary value problem in the spherical coordinate system, similar to a spherical cavity resonator. Next, eigenf... View full abstract»

• ### Memory-Efficient Method for Wideband Self-Adjoint Sensitivity Analysis

Publication Year: 2008, Page(s):1917 - 1927
Cited by:  Papers (16)
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Sensitivity analysis is crucial in microwave imaging and design procedures. We proposed a time-domain self- adjoint method for the computation of response Jacobians. The responses and their derivatives are computed with a single time-domain analysis. The overhead of the Jacobian computation is negligible compared to the time required by the simulation even when the number of optimizable parameters... View full abstract»

• ### Efficient Finite-Difference Time-Domain Modeling of Driven Periodic Structures and Related Microwave Circuit Applications

Publication Year: 2008, Page(s):1928 - 1937
Cited by:  Papers (11)
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The sine-cosine method for the finite-difference time-domain-based dispersion analysis of periodic structures is extended to incorporate the presence of nonperiodic wideband sources. A new formulation of this method is presented to clearly demonstrate that it can be employed for the characterization of periodic structures over a broad bandwidth. Moreover, its coupling with the array-scanning techn... View full abstract»

• ### A New Class of Dual-Mode Dual-Band Waveguide Filters

Publication Year: 2008, Page(s):1938 - 1944
Cited by:  Papers (27)
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This paper presents a new class of dual-mode dual-band filters in which each polarization is dedicated to a selected band. The equivalent circuit is a parallel combination of two inline networks that represent each polarization. A transmission zero is generated between the two bands by properly adjusting the relative orientations of the input and output coupling apertures. For filters where each b... View full abstract»

• ### A New Class of Low-Loss High-Linearity Electronically Reconfigurable Microwave Filter

Publication Year: 2008, Page(s):1945 - 1953
Cited by:  Papers (22)
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A novel electronically reconfigurable microwave bandpass filter based on a switched delay-line approach is presented. In contrast to conventional tunable filters, the approach enables the lossy and nonlinear switching elements to be used as part of the coupling elements rather than within the resonators. Therefore, the filter distinguishes itself through its ability to provide a wide tuning bandwi... View full abstract»

• ### Quasi-Static Derived Physically Expressive Circuit Model for Lossy Integrated RF Passives

Publication Year: 2008, Page(s):1954 - 1961
Cited by:  Papers (6)
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This paper presents a novel approach for deriving a physically meaningful circuit model for integrated RF lossy passives such as spiral inductors on a silicon substrate. The approach starts from a quasi-static partial element equivalent circuit (PEEC) model. The concept of complex inductance and capacitance is introduced to uniformly deal with the conductor and dielectric losses. Basic Y- D... View full abstract»

• ### Modeling of Eye-Diagram Distortion and Data-Dependent Jitter in Meander Delay Lines on High-Speed Printed Circuit Boards (PCBs) Based on a Time-Domain Even-Mode and Odd-Mode Analysis

Publication Year: 2008, Page(s):1962 - 1972
Cited by:  Papers (10)
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Crosstalk induced in a meander delay line produces a significant amount of waveform distortion and data-dependent jitter at the output port. This paper introduces an interpretation of the eye-diagram distortion and the jitter generation mechanism based on a time-domain even- and odd-mode analysis of a coupled transmission line structure. From the proposed analysis, this paper proposes jitter-estim... 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