# IEEE Transactions on Microwave Theory and Techniques

## Filter Results

Displaying Results 1 - 25 of 36
• ### Table of contents

Publication Year: 2007, Page(s):C1 - C4
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• ### IEEE Transactions on Microwave Theory and Techniques publication information

Publication Year: 2007, Page(s): C2
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• ### The Stochastic Gabor Function Enhances Bandwidth In Finite-Difference-Time Domain $S$-Parameter Estimation

Publication Year: 2007, Page(s):601 - 606
Cited by:  Papers (3)
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This paper introduces the stochastic Gabor function, an excitation waveform that can be used for finite-difference time-domain S-parameter estimation. The stochastic Gabor function is a Gaussian function modulated by uniformly distributed noise; it has wide frequency spectrum representation regardless of the stimuli pulse length. The stochastic Gabor function was studied in the time-frequency doma... View full abstract»

• ### Modeling and Characterization of On-Chip Transformers for Silicon RFIC

Publication Year: 2007, Page(s):607 - 615
Cited by:  Papers (62)  |  Patents (1)
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A broadband and scalable lumped-element model for silicon on-chip transformers is presented. Model elements are driven from layout and process technology specifications. We provide simple and accurate expressions for evaluating the self inductance and the mutual coupling coefficient. The effects of various layout parameters, including transformer area, number of turns, and turns ratio, on transfor... View full abstract»

• ### Intermodulation Distortion in Coupled-Resonator Filters With Nonuniformly Distributed Nonlinear Properties—Use in HTS IMD Compensation

Publication Year: 2007, Page(s):616 - 624
Cited by:  Papers (12)  |  Patents (1)
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We present a general procedure for calculating intermodulation distortion in coupled-resonator filters that allows one to predict the performance of a nonlinear filter as a function of the general nodal matrix defining the filter and the material parameters that cause the nonlinear behavior. It is valid for almost any type of nonlinear distributed effects, including those produced by high-temperat... View full abstract»

• ### An Ultra-Wideband Distributed Active Mixer MMIC in 0.18-$mu$m CMOS Technology

Publication Year: 2007, Page(s):625 - 632
Cited by:  Papers (16)
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In this paper, a distributed circuit topology for active mixers suitable for ultra-wideband operations is presented. By employing nonuniform artificial transmission lines with the complementary transconductance stages in the Gilbert-cell multiplier, the proposed mixer demonstrates broadband characteristics at microwave frequencies while maintaining a high conversion gain (CG) with improved gain fl... View full abstract»

• ### The Doherty Power Amplifier With On-Chip Dynamic Bias Control Circuit for Handset Application

Publication Year: 2007, Page(s):633 - 642
Cited by:  Papers (25)  |  Patents (3)
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A monolithic-microwave integrated-circuit Doherty power amplifier (PA) with an on-chip dynamic bias control circuit for cellular handset application has been designed and implemented. To improve the linearity and efficiency in the operation power ranges, the base and collector biases of the amplifiers, except the drive amplifier of the main path, are controlled according to the average output powe... View full abstract»

• ### Static and Dynamic Error Vector Magnitude Behavior of 2.4-GHz Power Amplifier

Publication Year: 2007, Page(s):643 - 647
Cited by:  Papers (12)  |  Patents (2)
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This paper presents error vector magnitude (EVM) behavior under two different modes of a reference voltage (Vref); one is a static EVM with a constant Vref and the other is a dynamic EVM with a pulsed Vref. A 2.4-GHz two-stage power amplifier (PA) is implemented by GaAs HBT technology to investigate EVM behavior for IEEE 802.11 g wireless local area network application. A squ... View full abstract»

• ### Nonohmic Contact Planar Varactor Frequency Upconverters for Terahertz Applications

Publication Year: 2007, Page(s):648 - 655
Cited by:  Papers (7)  |  Patents (1)
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The development of tunerless millimeter and sub-millimeter wavelength frequency upconverters with integrated planar varactor circuits is described in this paper. An upconverter operating at 200 GHz is implemented as a proof-of-principle demonstration, and designs using both ohmic and nonohmic contacts are tested. The nonohmic contact facilitates fabrication. Both the ohmic and nonohmic devices pro... View full abstract»

• ### 2-D Terahertz Metallic Photonic Crystals in Parallel-Plate Waveguides

Publication Year: 2007, Page(s):656 - 663
Cited by:  Papers (38)  |  Patents (3)
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2-D metallic photonic crystals without defects, with point defects, and with a Fabry-Perot (F-P) defect are characterized by terahertz time-domain spectroscopy. The metal parallel-plate waveguide (PPWG) with single TEM-mode propagation is used as a tool to simulate 2-D photonic crystals in free space. The 2-D metallic photonic-crystal structures were fabricated by coating Au on an SU-8 polymer cyl... View full abstract»

• ### Design Considerations for Traveling-Wave Single-Pole Multithrow MMIC Switch Using Fully Distributed FET

Publication Year: 2007, Page(s):664 - 671
Cited by:  Papers (11)
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The circuit design considerations for the traveling-wave switch (TWSW) single-pole double-throw (SPDT) monolithic microwave integrated circuit (MMIC) utilizing a fully distributed FET (FD-FET) are presented here for the first time. The normalized length of the impedance transformer for a single-pole multithrow TWSW using the FD-FET is found to be less than a quarter-wavelength at the operating fre... View full abstract»

• ### Manufacturing Tolerance Analysis, Fabrication, and Characterization of 3-D Submillimeter-Wave Electromagnetic-Bandgap Crystals

Publication Year: 2007, Page(s):672 - 681
Cited by:  Papers (20)
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The sensitivity of the characteristic band edge frequencies of three different 500-GHz electromagnetic-bandgap crystals to systematic variations in unit cell dimensions has been analyzed. The structures studied were square bar woodpiles made with dielectric having epsiv rap12 and epsivr=37.5 and two wide bandgap epsivr=37.5 crystals designs proposed by Fan and John... View full abstract»

• ### A 2.4-GHz Low-Power Low-IF Receiver and Direct-Conversion Transmitter in 0.18-$mu{hbox {m}}$ CMOS for IEEE 802.15.4 WPAN Applications

Publication Year: 2007, Page(s):682 - 689
Cited by:  Papers (40)  |  Patents (1)
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In this paper, a low-power low-IF receiver and a direct-conversion transmitter (DCT) suitable for the IEEE standard 802.15.4 radio system at the 2.4-GHz band are presented in 0.18-mum deep n-well CMOS technology. By using vertical NPN (V-NPN) bipolar junction transistors in the baseband analog circuits of the low-IF receiver, the image rejection performance is improved and the power consumption is... View full abstract»

• ### High-Efficiency Power Amplifier Using Novel Dynamic Bias Switching

Publication Year: 2007, Page(s):690 - 696
Cited by:  Papers (10)  |  Patents (1)
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A novel bias-switching scheme for a high-efficiency power amplifier is proposed. Two voltage levels for the drain bias of the RF power amplifier are generated using a combination of a class E dc/ac inverter and a class E rectifier with offset voltage. When signal peaks occur, the output of the class E dc/ac inverter is rectified and the rectified dc is added to the offset voltage by the class E re... View full abstract»

• ### Equivalent Resonant Cavity Model of Arbitrary Periodic Guided-Wave Structures and Its Application to Finite-Difference Frequency-Domain Algorithm

Publication Year: 2007, Page(s):697 - 702
Cited by:  Papers (22)
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An equivalent resonant cavity model is proposed and developed for efficiently and accurately extracting the complex propagation constant of any arbitrary bounded and unbounded periodic guided-wave structures, which is known as a difficult eigenvalue problem with respect to a deterministic or S-parameter-based field solver. In this study, this problem is formulated as a standard eigenvalue one, whi... View full abstract»

• ### An Alternative Algorithm for Both Narrowband and Wideband Lorentzian Dispersive Materials Modeling in the Finite-Difference Time-Domain Method

Publication Year: 2007, Page(s):703 - 708
Cited by:  Papers (11)
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In this study, an alternative algorithm is proposed for modeling narrowband and wideband Lorentzian dispersive materials using the finite-difference time-domain (FDTD) method. Previous algorithms for modeling narrowband and wideband Lorentzian dispersive materials using the FDTD method have been based on a recursive convolution technique. They present two different and independent algorithms for t... View full abstract»

• ### A Novel Approach to Modeling Metal–Insulator–Metal Capacitors Over Vias With Significant Electrical Length

Publication Year: 2007, Page(s):709 - 714
Cited by:  Papers (4)
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In monolithic-microwave integrated-circuit design, a metal-insulator-metal (MIM) capacitor is one of the key passive components. Some commonly used MIM capacitor models are optimized for series capacitor applications. These conventional models, however, face a challenge as a need for a shunt capacitor application arises. This paper is a solution provider, ushering in a new approach to modeling a s... View full abstract»

• ### Efficient Analysis of Arbitrarily Shaped Inductive Obstacles in Rectangular Waveguides Using a Surface Integral-Equation Formulation

Publication Year: 2007, Page(s):715 - 721
Cited by:  Papers (14)
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In this paper, we propose to use the surface integral-equation technique for the analysis of arbitrarily shaped H-plane obstacles in rectangular waveguides, which can contain both metallic and/or dielectric objects. The Green's functions are formulated using both spectral and spatial images series, whose convergence behavior has been improved through several acceleration techniques. Proceeding in ... View full abstract»

• ### Planar Models of Reconfigurable MEMS Circuits

Publication Year: 2007, Page(s):722 - 728
Cited by:  Papers (4)
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This paper presents a general procedure for the electromagnetic modeling of arbitrarily shaped reconfigurable planar circuits using RF microelectromechanical systems switches. In this model, the reconfigurable structure is represented by a linear time-invariant planar multiport, which is connected through internal ports to as many variable lumped-element circuits as the switches. Unlike convention... View full abstract»

• ### System and Circuit Models for Microwave Antennas

Publication Year: 2007, Page(s):729 - 735
Cited by:  Papers (5)
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This paper describes how circuit and system models are derived for antennas from measurement of the input reflection coefficient. Circuit models are used to optimize the antenna performance and to calculate the radiated power and the transfer function of the antenna. System models are then derived for transmitting and receiving antennas. The most important contribution of this study is to show how... View full abstract»

• ### A Note on the Multiplicity of Poles in the Vector Fitting Macromodeling Method

Publication Year: 2007, Page(s):736 - 741
Cited by:  Papers (15)
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Vector fitting is a robust macromodeling tool for rational approximation of spectral data obtained by full-wave electromagnetic simulators or high-frequency measurements. The technique iteratively calculates a suitable set of poles, and solves the residues of the transfer function in a two-step procedure. If poles with a higher order multiplicity occur during the pole-identification step, numerica... View full abstract»

• ### A Novel Band-Reject Element for Pseudoelliptic Bandstop Filters

Publication Year: 2007, Page(s):742 - 746
Cited by:  Papers (11)
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A novel band-reject element for the design of inline waveguide pseudoelliptic band-reject filters is introduced. The element consists of an offset partial-height post in a rectangular waveguide in which the dominant TE10 mode is propagating. The location of the attenuation pole is primarily determined by the height of the post that generates it. The element allows the implementation of ... View full abstract»

• ### Design and Analysis of Super-Wide Bandpass Filters Using a Novel Compact Meta-Structure

Publication Year: 2007, Page(s):747 - 753
Cited by:  Papers (32)
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This paper presents a novel compact meta-structure, which is characterized by left-handed properties. In the novel structure, two linear arrays of metallic vias and short-stub inductors are used to generate shunt inductors besides the series interdigital capacitors. Compared with conventional composite right/left-handed transmission-line structures, the new structure has weaker coupling to other c... View full abstract»

• ### A 12-Pole Narrowband Highly Selective High-Temperature Superconducting Filter for the Application in the Third-Generation Wireless Communications

Publication Year: 2007, Page(s):754 - 759
Cited by:  Papers (21)
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An ultra-selective high-temperature superconducting bandpass filter was designed and fabricated to satisfy the demands of the third-generation wireless communications. This filter was designed to have 12-pole quasi-elliptic response with 4.68-MHz bandwidth in the third-generation communications band (a fractional bandwidth of 0.0023). Full-wave simulations were conducted by using Sonnet software. ... View full abstract»

• ### A New Coupling Matrix Extracting Method From the Frequency Response

Publication Year: 2007, Page(s):760 - 767
Cited by:  Papers (5)
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Coupled resonators are widely used in many applications, especially for filters. It is necessary to know the coupling matrix of those resonators in order to further modify and/or optimize the existing design. In recent years, many efforts have been made to generate a coupling matrix. In this paper, a new method is proposed, which can be applied for both the synchronous and asynchronous coupled res... 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