# IEEE Transactions on Microwave Theory and Techniques

## Filter Results

Displaying Results 1 - 25 of 31

Publication Year: 2010, Page(s):C1 - C4
| PDF (49 KB)
• ### IEEE Transactions on Microwave Theory and Techniques publication information

Publication Year: 2010, Page(s): C2
| PDF (44 KB)

Publication Year: 2010, Page(s):489 - 497
Cited by:  Papers (27)
| | PDF (1369 KB) | HTML

This paper presents a new type of monolithic microwave integrated circuit (MMIC)-based active quasi-circulator using phase cancellation and combination techniques for simultaneous transmit and receive (STAR) phased-array applications. The device consists of a passive core of three quadrature hybrids and active components to provide active quasi-circulation operation. The core of three quadrature h... View full abstract»

• ### A Transimpedance Amplifier With a Tunable Bandwidth in 0.18-$\mu{\hbox{m}}$CMOS

Publication Year: 2010, Page(s):498 - 505
Cited by:  Papers (11)
| | PDF (1562 KB) | HTML

In this paper, a transimpedance amplifier (TIA) with a tunable 3-dB bandwidth is presented for optical communications. The proposed TIA is composed of two cascaded stages in which an input network with inductive peaking elements is employed in the first stage for broadband operations while a modified distributed amplifier is utilized as the second stage for enhanced transimpedance gain. In additio... View full abstract»

• ### Cascaded Constructive Wave Amplification

Publication Year: 2010, Page(s):506 - 517
Cited by:  Papers (18)
| | PDF (1575 KB) | HTML

A high-frequency amplifier technique is introduced based on traveling-wave amplification. As opposed to distributing amplifiers to support traveling waves, the proposed technique amplifies forward traveling waves while attenuating backward traveling waves through a cascade of stages that share a single transmission line. The behavior of the cascaded constructive wave amplifier is analyzed in terms... View full abstract»

• ### RF CMOS Parametric Downconverters

Publication Year: 2010, Page(s):518 - 528
Cited by:  Papers (10)  |  Patents (1)
| | PDF (595 KB) | HTML

Parametric amplifiers are absent today from the majority of electronics applications. This is especially the case for parametric downconverters (PDCs). Coupled with the increasing emphasis on millimeter-wave applications and the cost of transistor scaling, the time may be right to reconsider these circuits. By employing coupled-mode theory, we arrive at a general description of PDCs. Consequently,... View full abstract»

• ### Efficient Modal Analysis of Periodic Structures Loaded With Arbitrarily Shaped Waveguides

Publication Year: 2010, Page(s):529 - 536
Cited by:  Papers (6)
| | PDF (729 KB) | HTML

In this paper, a novel full-wave method for the modal characterization of closed metallic periodic structures based on arbitrarily shaped waveguides is presented. This method relies on an integral equation formulation solved via the method of moments, which finally leads to the solution of a standard eigenvalue problem. The required modal spectrum of waveguides with arbitrary cross section is dete... View full abstract»

• ### Hybrid Mode Matching and Method of Moments Method for the Full-Wave Analysis of Arbitrarily Shaped Structures Fed Through Canonical Waveguides Using Only Electric Currents

Publication Year: 2010, Page(s):537 - 544
Cited by:  Papers (9)
| | PDF (809 KB) | HTML

A new hybrid mode matching and method of moments formulation based only on electric currents is presented in this paper. The use of only one equivalent current allows the introduction of a new set of unknowns. The chosen new unknowns are the weights related to the scattered modes that emerge from the ports to the waveguides that feed the problem. Applying this new formulation, the matrices that mu... View full abstract»

• ### Derivation of Lichtenecker's Logarithmic Mixture Formula From Maxwell's Equations

Publication Year: 2010, Page(s):545 - 550
Cited by:  Papers (68)
| | PDF (179 KB) | HTML

Lichtenecker's logarithmic mixture formula for dielectrics has proven to be a useful practical formulation for determining the effective permittivity of homogenized dielectric mixtures. However, the formula itself has long been regarded as semiempirical in nature without firm theoretical justification. This paper shows that Lichtenecker's formula can be derived by applying Maxwell's equations and ... View full abstract»

• ### A Near-Field Probe for Subwavelength-Focused Imaging

Publication Year: 2010, Page(s):551 - 558
Cited by:  Papers (12)
| | PDF (1090 KB) | HTML

A near-field antenna array probe is presented that can perform subwavelength-focused imaging at a distance of 0.25¿ . The array is composed of a centrally fed dipole with open-circuited secondary dipoles placed less than half a wavelength away on each side. Together, they produce a subwavelength focal spot that can be used to detect the presence of small wire loops with subwavelength resolution. T... View full abstract»

• ### Integral-Equation Equivalent-Circuit Method for Modeling of Noise Coupling in Multilayered Power Distribution Networks

Publication Year: 2010, Page(s):559 - 565
Cited by:  Papers (21)
| | PDF (1100 KB) | HTML

Power distribution networks are the major source of noise coupling in high-speed and high-density electronic packages and printed circuit boards. We present the integral equation hybrid with the modal decoupling as a simple and efficient method for the modeling of multilayered power distribution networks. In this method, the power distribution network is decoupled into three simple parts: power-gr... View full abstract»

• ### Identification of Highly Efficient Delay-Rational Macromodels of Long Interconnects From Tabulated Frequency Data

Publication Year: 2010, Page(s):566 - 577
Cited by:  Papers (12)  |  Patents (3)
| | PDF (1098 KB) | HTML

We introduce a novel formulation of black-box models for long multiconductor interconnects, together with an identification algorithm from tabulated scattering parameters. The fundamental assumption requires a modal decomposition matrix that does not depend on frequency. The model structure includes low-order rational coefficients with suitable delay operators. The latter are included in a feedbac... View full abstract»

• ### Towards the Development of an Unconditionally Stable Time-Domain Meshless Method

Publication Year: 2010, Page(s):578 - 586
Cited by:  Papers (46)
| | PDF (1060 KB) | HTML

In this paper, an unconditionally stable mesheless method is proposed with the implementation of the leapfrog alternating-direction-implicit scheme in the 3-D radial point interpolation meshless method. The unconditional stability of the proposed method is analytically proven and numerically verified. The accuracy and efficiency of the method are assessed through experiments. Compared with the con... View full abstract»

• ### Analysis of Near-Carrier Phase-Noise Spectrum in Free-Running Oscillators in the Presence of White and Colored Noise Sources

Publication Year: 2010, Page(s):587 - 601
Cited by:  Papers (20)
| | PDF (1102 KB) | HTML

This paper presents the stochastic characterization of the phase-noise spectrum of free-running oscillators in the envelope domain. The flicker-noise sources are modeled as an infinite summation of Ornstein-Uhlenbeck processes. Inputs of the formulation are parameters extracted with harmonic balance (HB) by means of the carrier-modulation approach. These parameters can be easily identified with co... View full abstract»

• ### Closed-Form Green's Functions in Planar Layered Media for All Ranges and Materials

Publication Year: 2010, Page(s):602 - 613
Cited by:  Papers (66)
| | PDF (532 KB) | HTML

An important extension of the two-level discrete complex image method is proposed to eliminate any concerns on and shortcomings of the approximations of the spatial-domain Green's functions in closed form in planar multilayered media. The proposed approach has been devised to account for the possible wave constituents of a dipole in layered media, such as spherical, cylindrical, and lateral waves,... View full abstract»

• ### Multilayer Dual-Band Bandpass Filter in Low-Temperature Co-Fired Ceramic Substrate for Ultra-Wideband Applications

Publication Year: 2010, Page(s):614 - 623
Cited by:  Papers (32)
| | PDF (2330 KB) | HTML

In this paper, we propose a new multilayer dual-band bandpass filter in a low-temperature co-fired ceramic (LTCC) substrate for ultra-wideband (UWB) applications. This bandpass filter consists of two wideband bandpass filters and matching circuits. It is for UWB applications, which use the band group 1 (3.168-4.752 GHz) and the band groups 3 and 4 (6.336-9.504 GHz) of multiband orthogonal frequenc... View full abstract»

• ### Development of Multilayered Bandpass Filters With Multiple Transmission Zeros Using Open-Stub/Short-Stub/Serial Semilumped Resonators

Publication Year: 2010, Page(s):624 - 634
Cited by:  Papers (16)  |  Patents (1)
| | PDF (1401 KB) | HTML

This paper proposes novel multilayered bandpass filters with multiple transmission zeros. These filters are developed with the assistance of semilumped resonators. Moreover, three resonant structures, i.e., open-stub, short-stub, and serial semilumped resonators, used for transmission zeros are provided as well. The fabricated examples are in agreement with theoretical predictions; therefore, our ... View full abstract»

• ### Design of Bandpass Filter Based on Hybrid Planar Waveguide Resonator

Publication Year: 2010, Page(s):635 - 644
Cited by:  Papers (8)
| | PDF (794 KB) | HTML

This paper presents a new concept of bandpass resonator based upon the association of planar and substrate integrated waveguide technologies. The selectivity, control of rejection, and ease of design are significantly enhanced by the hybrid planar waveguide resonator compared to the classical substrate integrated waveguide resonators. The hybrid planar waveguide resonator is built from the associa... View full abstract»

• ### Analytical Modeling of Multilayered Coplanar Waveguides Including Ferromagnetic Thin Films on Semiconductor Substrates

Publication Year: 2010, Page(s):645 - 650
Cited by:  Papers (1)
| | PDF (599 KB) | HTML

A review of analytical modeling for conventional coplanar waveguides (CPWs) is carried out. Thus, a refined model based on an electrical equivalent circuit with distributed elements is proposed to properly describe the frequency behavior of a multilayered CPW on a semiconductor substrate. Furthermore, inductors based on such CPWs using a ferromagnetic thin film are studied. Realizations are shown ... View full abstract»

• ### Dual-Band Branch-Line Coupler With Port Extensions

Publication Year: 2010, Page(s):651 - 655
Cited by:  Papers (39)
| | PDF (433 KB) | HTML

A new branch-line coupler structure with port extensions is proposed for the dual-band operation. The conventional branch-line coupler structure is adapted to the dual-band operation by inserting a transmission line section at the input ports and modifying the branch parameters. The dual-band performance of the proposed coupler is verified theoretically through the rigorous microwave circuit analy... View full abstract»

• ### An Accurate Calibrate-Able Multiharmonic Active Load–Pull System Based on the Envelope Load–Pull Concept

Publication Year: 2010, Page(s):656 - 664
Cited by:  Papers (16)
| | PDF (1117 KB) | HTML

After calibration, since the systematic imperfections of the envelop load-pull (ELP) components were now fully accounted for, the user is able to rapidly set accurate terminations with full Smith chart coverage. This functionality has been achieved by optimizing the hardware configuration of the envelop load-pull concept. Development of a system whose systematic errors could be described by a magn... View full abstract»

• ### Quadratic Electrooptic Effect for Frequency Down-Conversion

Publication Year: 2010, Page(s):665 - 673
Cited by:  Papers (5)
| | PDF (513 KB) | HTML

A novel optical frequency down-conversion approach employing the quadratic electrooptic effect is proposed, analyzed, and verified. This down-conversion method can seamlessly integrate with an optical phase-locked-loop linear phase demodulator. It has the potential to achieve a large dynamic range and low conversion loss. Comprehensive theoretical studies are performed to investigate the noise, ef... View full abstract»

• ### Spread Spectrum Orthogonal Frequency Coded SAW Tags and Sensors Using Harmonic Operation

Publication Year: 2010, Page(s):674 - 679
Cited by:  Papers (4)
| | PDF (1501 KB) | HTML

This paper presents a preliminary investigation of orthogonal frequency coding (OFC) surface acoustic wave tags and sensors at a 500- and 900-MHz operational frequency range using conventional contact lithography techniques. The higher frequency devices are achieved using second harmonic operation; eliminating the need for advanced lithography techniques. The objective of this effort is to increas... View full abstract»

• ### Irradiation of a Six-Layered Spherical Model of Human Head in the Near Field of a Half-Wave Dipole Antenna

Publication Year: 2010, Page(s):680 - 690
Cited by:  Papers (10)
| | PDF (864 KB) | HTML

The interaction between a six-layered lossy spherical human head model and a half-wave dipole antenna is analyzed in this paper. The proposed method is based on deriving a simple form of Green's function for multilayer lossy sphere. To derive the Green's function of the six-layered sphere, first the Sommerfeld integral is used to expand the field of a simple electric dipole as a sum of an infinite... View full abstract»

• ### A 3-D Microdosimetric Study on Blood Cells: A Permittivity Model of Cell Membrane and Stochastic Electromagnetic Analysis

Publication Year: 2010, Page(s):691 - 698
Cited by:  Papers (28)
| | PDF (896 KB) | HTML

This paper describes a microdosimetric study on erythrocytes in two parts: an assessment of the membrane dielectric model from permittivity measurements of erythrocyte solutions and its uncertainty, and a quasi-static electromagnetic (EM) analysis solving the Laplace equation, both analytically and numerically. To evaluate the role of the estimated uncertainty, a stochastic EM solution has been co... 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..

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Luca Perregrini
luca.perregrini@unipv.it

Editor-in-Chief
Jose Carlos Pedro
edit.tmtt@ua.pt