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# IEEE Transactions on Microwave Theory and Techniques

## Filter Results

Displaying Results 1 - 25 of 30

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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• ### Frequency-Thermal Characterization of On-Chip Transformers With Patterned Ground Shields

Publication Year: 2007, Page(s):1 - 12
Cited by:  Papers (19)  |  Patents (2)
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Extensive studies on the performance of on-chip CMOS transformers with and without patterned ground shields (PGSs) at different temperatures are carried out in this paper. These transformers are fabricated using 0.18-mum RF CMOS processes and are designed to have either interleaved or center-tapped interleaved geometries, respectively, but with the same inner dimensions, metal track widths, track ... View full abstract»

• ### Fully Integrated Differential Distributed VCO in 0.35-μm SiGe BiCMOS Technology

Publication Year: 2007, Page(s):13 - 22
Cited by:  Papers (5)
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We present a fully integrated differential distributed voltage-controlled oscillator implemented in a 0.35-mum SiGe BiCMOS technology. The delay variation by a positive feedback tuning technique, adopted from the ring oscillators, is demonstrated as a fine-tuning alternative, which results to an approximately 420-MHz tuning range. The phase noise is -98 dBc/Hz at 1-MHz offset from the 14.25-GHz ca... View full abstract»

• ### A low phase-noise X-band MMIC VCO using high-linearity and low-noise composite-channel Al0.3Ga0.7N/Al0.05Ga0.95 N/GaN HEMTs

Publication Year: 2007, Page(s):23 - 29
Cited by:  Papers (25)
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A low phase-noise X-band monolithic-microwave integrated-circuit voltage-controlled oscillator (VCO) based on a novel high-linearity and low-noise composite-channel Al0.3Ga0.7N/Al0.05Ga0.95 N/GaN high electron mobility transistor (HEMT) is presented. The HEMT has a 1 μm x 100 μm gate. A planar inter-digitated metal-semiconductor-metal var... View full abstract»

• ### Ultra-Compact High-Linearity High-Power Fully Integrated DC–20-GHz 0.18-$mu{hbox {m}}$ CMOS T/R Switch

Publication Year: 2007, Page(s):30 - 36
Cited by:  Papers (76)
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A fully integrated ultra-broadband transmit/receive (T/R) switch has been developed using nMOS transistors with a deep n-well in a standard 0.18-mum CMOS process, and demonstrates unprecedented insertion loss, isolation, power handling, and linearity. The new CMOS T/R switch exploits patterned-ground-shield on-chip inductors together with MOSFET's parasitic capacitances to synthesize artificial tr... View full abstract»

• ### Analysis of the Survivability of GaN Low-Noise Amplifiers

Publication Year: 2007, Page(s):37 - 43
Cited by:  Papers (64)  |  Patents (1)
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This paper presents a detailed analysis of the stressing mechanisms for highly rugged low-noise GaN monolithic-microwave integrated-circuit amplifiers operated at extremely high input powers. As an example, a low-noise amplifier (LNA) operating in the 3-7-GHz frequency band is used. A noise figure (NF) below 2.3 dB is measured from 3.5 to 7 GHz with NF<1.8 dB between 5-7 GHz. This device surviv... View full abstract»

• ### A 16-GHz Triple-Modulus Phase-Switching Prescaler and Its Application to a 15-GHz Frequency Synthesizer in 0.18-$mu$m CMOS

Publication Year: 2007, Page(s):44 - 51
Cited by:  Papers (15)
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A triple-modulus phase-switching prescaler for high- speed operations is presented in this paper. By reversing the switching orders between the eight 45deg-spaced signals generated by the 8 : 1 frequency divider, the maximum operating frequency of the prescaler is effectively enhanced. With the triple-modulus switching scheme, a wide frequency covering range is achieved. The proposed prescaler is ... View full abstract»

• ### A New Envelope Predistorter With Envelope Delay Taps for Memory Effect Compensation

Publication Year: 2007, Page(s):52 - 59
Cited by:  Papers (21)
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We present a new linearization method for high-power amplifiers, using an envelope predistorter (EPD) including envelope delay taps and control circuits, for memory effect compensation. The lower and upper third-order intermodulation (IM3) components, generated by the EPD, can be separately controlled for their magnitudes and phases by the additional memory effect compensation circuits.... View full abstract»

• ### A Low Phase-Noise Voltage-Controlled SAW Oscillator With Surface Transverse Wave Resonator for SONET Application

Publication Year: 2007, Page(s):60 - 65
Cited by:  Papers (8)
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A surface transverse wave (STW) resonator-based oscillator was developed in response to SONET OC-48 application. To meet the low jitter objective, a high-Q STW resonator was designed and fabricated in this study. The residual phase-noise measurement techniques are used to evaluate the feedback oscillator components, such as the loop amplifier, STW resonator, and electronic phase shifter, which can... View full abstract»

• ### Phase-Noise Reduction of $X$-Band Push–Push Oscillator With Second-Harmonic Self-Injection Techniques

Publication Year: 2007, Page(s):66 - 77
Cited by:  Papers (21)  |  Patents (2)
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A low phase-noise X-band push-push oscillator using proposed feedback topology is presented in this paper. The oscillator core was implemented in a 0.18-mum CMOS process. By using a power splitter and a delay path in the feedback loop connecting the output and current source of the oscillator, a part of the oscillator output power injects to the oscillator itself. With the proper phase delay in th... View full abstract»

• ### Gold-Plated Micromachined Millimeter-Wave Resonators Based on Rectangular Coaxial Transmission Lines

Publication Year: 2007, Page(s):78 - 84
Cited by:  Papers (7)  |  Patents (2)
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Resonators based on microfabricated rectangular coaxial (recta-coax) transmission lines are presented. The resonators were fabricated using a multilayered nickel electroplating process that enables the fabrication of three-dimensional structures. As a method to improve performance, gold was plated on the resonators using an electroless process. A model for predicting the effect of the plating on a... View full abstract»

• ### Uniform Electric Field Distribution in Microwave Heating Applicators by Means of Genetic Algorithms Optimization of Dielectric Multilayer Structures

Publication Year: 2007, Page(s):85 - 91
Cited by:  Papers (16)
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In this paper, the design of a dielectric multilayer around a clay sample is presented to achieve a uniform electric field distribution over that sample. This structure is located within a multimode microwave-heating oven and is designed by means of genetic algorithms. The permittivity and geometric values for the sample surrounding layers are the selected parameters to be optimized in order to mi... View full abstract»

• ### Determination of Generalized Permeability Function and Field Energy Density in Artificial Magnetics Using the Equivalent-Circuit Method

Publication Year: 2007, Page(s):92 - 99
Cited by:  Papers (12)  |  Patents (1)
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The equivalent-circuit model for artificial magnetic materials based on various arrangements of broken loops is generalized by taking into account losses in the substrate or matrix material. It is shown that a modification is needed to the known macroscopic permeability function in order to correctly describe these materials. Depending on the dominating loss mechanism (conductive losses in metal p... View full abstract»

• ### Fast Numerical Computation of Green's Functions for Unbounded Planar Stratified Media With a Finite-Difference Technique and Gaussian Spectral Rules

Publication Year: 2007, Page(s):100 - 107
Cited by:  Papers (7)
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A computational methodology for the calculation of Green's functions for unbounded planar stratified media is proposed in this paper. Unlike several techniques that are based on analytical calculations in the spectral domain, this one is based on a previously proposed finite-difference discretization of the corresponding one-dimensional differential equation and the resulting spectral matrix probl... View full abstract»

• ### Efficient Modal Analysis of Bianisotropic Waveguides by the Coupled Mode Method

Publication Year: 2007, Page(s):108 - 116
Cited by:  Papers (2)
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A modal analysis based on the coupled mode method is performed for the resolution of partially filled waveguides with a general bianisotropic medium. The calculation of the generalized telegraphist's equations can be made by using two different strategies: direct and indirect formulations. In this paper, the indirect formulation of the method is extended to bianisotropic materials and exposed in d... View full abstract»

• ### HTS Quasi-Elliptic Filter Using Capacitive-Loaded Cross-Shape Resonators With Low Sensitivity to Substrate Thickness

Publication Year: 2007, Page(s):117 - 120
Cited by:  Papers (10)
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The design and implementation of a four-pole quasi-elliptic filter for X-band radar applications using high-temperature superconductors is presented. The resonators used consist of cross-shape ring resonators with additional interdigital capacitive loads that allow miniaturization with reduction of sensitivity to substrate thickness. The experimental and simulated results are shown together with t... View full abstract»

• ### Design of Compact Low-Pass Elliptic Filters Using Double-Sided MIC Technology

Publication Year: 2007, Page(s):121 - 127
Cited by:  Papers (12)
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A novel implementation of stepped-impedance low-pass elliptic filters is presented in this paper. The filters are based on the well-known technique of cascading high- and low-impedance sections to simulate the ladder LC lumped-circuit prototype. We propose in this study a new approach to build up the constitutive circuit elements by taking advantage of the use of both sides of the substrate. The u... View full abstract»

• ### Novel Multifold Finite-Ground-Width CPW Quarter-Wavelength Filters With Attenuation Poles

Publication Year: 2007, Page(s):128 - 136
Cited by:  Papers (1)
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This paper proposes a novel multifold finite-ground-width coplanar waveguide (CPW) lambda/4 resonator filter that has the capability of realizing attenuation poles by cross coupling of nonadjacent resonators. The newly proposed multifold structures not only greatly shrink the length of a resonator, but also provide a convenient way to implement cross coupling in a filter. The proposed multifold fi... View full abstract»

• ### Novel Patch-Via-Spiral Resonators for the Development of Miniaturized Bandpass Filters With Transmission Zeros

Publication Year: 2007, Page(s):137 - 146
Cited by:  Papers (24)  |  Patents (1)
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A novel patch-via-spiral resonator based on the dual-metal-plane configuration is proposed and examined. With the microstrip patch on the top plane serving as a capacitor and linking to the quasi-lumped spiral inductor on the bottom plane through a connecting via, the proposed dual-plane resonator structure located on the opposite sides of the single substrate may form a miniaturized one in the pr... View full abstract»

• ### Microstrip Realization of Generalized Chebyshev Filters With Box-Like Coupling Schemes

Publication Year: 2007, Page(s):147 - 153
Cited by:  Papers (84)  |  Patents (1)
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This paper presents generalized Chebyshev microstrip filters with box-like coupling schemes. The box-like coupling schemes taken in this paper include a doublet, extended doublet, and fourth-order box section. The box-like portion of the coupling schemes is implemented by an E-shaped resonator. Synthesis and realization procedures are described in detail. The example filters show an excellent matc... View full abstract»

• ### Tunable Dielectric Resonator Bandpass Filter With Embedded MEMS Tuning Elements

Publication Year: 2007, Page(s):154 - 160
Cited by:  Papers (45)  |  Patents (1)
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This paper presents a novel approach for constructing a tunable dielectric resonator bandpass filter by using the microelectromechanical system (MEMS) technology. The tunability is achieved by unique MEMS tuning elements to perturb the electrical and magnetic fields surrounding the dielectric resonators. The use of such elements as a tuning mechanism results in a wide tuning range at a relatively ... View full abstract»

• ### A Broadband Compact Microstrip Rat-Race Hybrid Using a Novel CPW Inverter

Publication Year: 2007, Page(s):161 - 167
Cited by:  Papers (45)
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A new compact microstrip rat-race hybrid with an octave bandwidth employing a novel frequency-independent coplanar waveguide (CPW) phase inverter is reported in this paper. The 270deg branch of a conventional rat-race is replaced by a -90deg branch, which is realized by a 90deg microstrip line and the CPW phase inverter. A new microstrip-to-CPW transition is introduced for which a lumped-element m... View full abstract»

• ### On the Fast and Rigorous Analysis of Compensated Waveguide Junctions Using Off-Centered Partial-Height Metallic Posts

Publication Year: 2007, Page(s):168 - 175
Cited by:  Papers (18)
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In this paper, we present an efficient and rigorous method, based on the 3-D boundary integral-resonant-mode expansion technique, for the analysis of multiport rectangular waveguide junctions compensated with partial-height cylindrical metallic posts. The electrical performance of a great variety of commonly used wideband microwave circuits has been improved drastically thanks to the introduction ... View full abstract»

• ### Nonlinear Distortion Due to Cross-Phase Modulation in Microwave Fiber-Optic Links With Optical Single-Sideband or Electrooptical Upconversion

Publication Year: 2007, Page(s):176 - 184
Cited by:  Papers (1)
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A new analytical model is presented to study nonlinear distortion due to cross-phase modulation in dispersive and nonlinear wavelength-division-multiplexing microwave fiber-optic links. The model is not based on the pump-probe approach. Hence, it can be used to analyze a larger variety of links, including, in particular, electrooptical upconversion links. Our simulations and experiments show that ... 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