# IEEE Microwave and Wireless Components Letters

## Filter Results

Displaying Results 1 - 20 of 20
• ### Blank page [back cover]

Publication Year: 2008, Page(s): C4
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Publication Year: 2008, Page(s): C1
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• ### IEEE Microwave and Wireless Components Letters publication information

Publication Year: 2008, Page(s): C2
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• ### Complex Envelope Six-Stages Split-Step PML Algorithm for Open Region Electromagnetic Problems

Publication Year: 2008, Page(s):713 - 715
Cited by:  Papers (1)
| |PDF (138 KB) | HTML

An implicit complex envelope split-step perfectly matched layer algorithm is presented for modeling open region finite difference time domain (FDTD) problems. The algorithm is based on splitting the FDTD time-step into six stages with an equal time increment of Deltat/6 and it is suitable for band-limited electromagnetic applications. Numerical examples carried out in two dimensions sho... View full abstract»

• ### DIFFT: A Fast and Accurate Algorithm for Fourier Transform Integrals of Discontinuous Functions

Publication Year: 2008, Page(s):716 - 718
Cited by:  Papers (8)
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A new highly accurate fast algorithm is proposed for computing the Fourier transform integrals of discontinuous functions (DIFFT) by employing the analytical Fourier transforms of Gauss-Chebyshev-Lobatto interpolation polynomials and the scaled fast Fourier transform. This algorithm can achieve the exponential accuracy for evaluation of Fourier spectra at the whole frequency range with a low compu... View full abstract»

• ### An Alternating-Direction Implicit FDTD Modeling of Dispersive Media Without Constitutive Relation Splitting

Publication Year: 2008, Page(s):719 - 721
Cited by:  Papers (4)
| |PDF (247 KB) | HTML

In recent years, the alternating-direction implicit finite-difference time-domain (ADI-FDTD) method has been extended to dispersive media. To this end, a constitutive relation is appended to Maxwell's curl equations. A common feature of all of the existing formulations is that the integration over a full time step, of Maxwell's equations and the constitutive relation, is split into two sub-steps. View full abstract»

Publication Year: 2008, Page(s):722 - 724
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We present a parallel implementation of the alternating direction implicit-body of revolution-finite difference time domain (ADI-BOR-FDTD) method on a high performance computer using a Message Passing Interface (MPI) library. In BOR-FDTD codes, the body of revolution symmetry is exploited to reduce the computational complexity by projecting the 3-D Yee-cell in cylindrical coordinates onto a 2-D pl... View full abstract»

• ### Extension of a Memory-Efficient Formulation for the Unconditionally Stable WLP-FDTD Method

Publication Year: 2008, Page(s):725 - 727
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In this letter, a memory efficient modification to the unconditionally stable finite-difference time-domain (FDTD) method combined with weighted Laguerre polynomials (WLP) is proposed. The divergence theorem is applied to the lossy media and perfectly matched layer (PML). This leads to a more memory-efficient matrix equation, and the computation time is reduced. A numerical example considering a t... View full abstract»

• ### Generalized Model for Multiband Metamaterial Transmission Lines

Publication Year: 2008, Page(s):728 - 730
Cited by:  Papers (15)  |  Patents (1)
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In this letter, a generalized circuit model valid for the description of composite right/left handed metamaterial transmission lines with an arbitrary number of bands is presented for the first time. The model is a T- or pi-circuit where the series branch is composed of parallel connected series resonators, and the shunt branch consists on series connected parallel resonant tanks. It is demonstrat... View full abstract»

• ### A K-Band CMOS Voltage Controlled Delay Line Based on an Artificial Left-Handed Transmission Line

Publication Year: 2008, Page(s):731 - 733
Cited by:  Papers (16)
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A K-band voltage controlled delay line based on a left-handed transmission line (LHTL) with cascaded metal-oxide-semiconductor (MOS) varactors and shunt inductors using CMOS technology is demonstrated for the first time. A variable time delay can be obtained by changing the capacitance of MOS varactors without any power consumption. The figure of merit is 10.9deg/dB at 18 GHz. This result is bette... View full abstract»

• ### Compact Rat-Race Coupler Using Shunt-Stub-Based Artificial Transmission Lines

Publication Year: 2008, Page(s):734 - 736
Cited by:  Papers (50)  |  Patents (1)
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In this letter, a compact rat-race coupler is developed using shunt-stub-based artificial transmission lines (SSB ATLs). A conventional quarter-wavelength microstrip can be equivalent to an SSB ATL realized by two series high-impedance microstrips with the high-impedance branch-type shunt stubs. The circuit configuration of the SSB ATL is beneficial to miniaturize the circuit size using the foldin... View full abstract»

• ### An Unequal Wilkinson Power Divider for a Frequency and Its First Harmonic

Publication Year: 2008, Page(s):737 - 739
Cited by:  Papers (63)
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This letter presents a Wilkinson power divider operating at a frequency and its first harmonic with unequal power divider ratio. To obtain the unequal property, four groups of 1/6 wavelength transmission lines with different characteristic impedances are needed to match all ports. Theoretically, closed-form equations for the design are derived based on transmission line theory. Experimental result... View full abstract»

• ### Monolithic Rectangular Coaxial Lines and Resonators With Embedded Dielectric Support

Publication Year: 2008, Page(s):740 - 742
Cited by:  Papers (13)  |  Patents (5)
| |PDF (505 KB) | HTML

Monolithic rectangular coaxial lines and related transmission line resonators with dielectric support embedded within the body of the inner conductor are demonstrated in this letter. Effects of dielectric straps are thoroughly studied and conclusions are verified through simulations and experiments. A very low-loss of below 0.1 dB/cm and unloaded Q -factors around 400 are measured at Ka-ban... View full abstract»

• ### Concept of Virtual Electric/Magnetic Walls and its Realization With Artificial Magnetic Conductor Technique

Publication Year: 2008, Page(s):743 - 745
Cited by:  Papers (2)
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In this letter, we present a novel concept of virtual electric/magnetic walls which are formed by combining perfect electric conducting parallel plates and perfect magnetic conducting parallel plates. In practice, the perfect magnetic wall can be replaced with an artificial magnetic conductor surface. Two types of complementary transverse electromagnetic waveguides are built with the virtual elect... View full abstract»

• ### Ultra-Wideband CPW-to-Substrate Integrated Waveguide Transition Using an Elevated-CPW Section

Publication Year: 2008, Page(s):746 - 748
Cited by:  Papers (28)
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In this letter, an elevated-coplanar waveguide (ECPW) is proposed for an intermediate section of a coplanar waveguide (CPW)-to-substrate integrated waveguide (SIW) transition. The ECPW is used to attain a gradual mode matching and to achieve the consequent wide bandwidth. The measurement results show 70% fractional bandwidth at 10 dB return loss and 0.9 dB insertion loss from 19 to 40 GHz. We expe... View full abstract»

• ### A 67 dBm $OIP_{3}$ Multistacked Junction Varactor

Publication Year: 2008, Page(s):749 - 751
Cited by:  Papers (6)  |  Patents (3)
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A multistacked varactor is presented for ultra-linear tunable radio frequency applications. The varactor elements are applied in anti-series configuration and are characterized by an "exponential" C-VR relationship. Third-order intermodulation (IM3) is cancelled through proper harmonic loading of the terminals of the anti-series configuration. Multiple stacking is used to fur... View full abstract»

• ### Ring-Based Direct Injection-Locked Frequency Divider in Display Technology

Publication Year: 2008, Page(s):752 - 754
Cited by:  Papers (9)
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This letter presents the first RF frequency divider on glass to demonstrate the feasibility of system on display (SoD). The frequency divider is developed in 1P2M 3 mum low-temperature polycrystalline silicon (LTPS) thin-film transistor technology. The core cell of the LTPS direct injection-locked frequency divider is the single stage ring oscillator. The additional cross-coupled transistor pair i... View full abstract»

• ### A 27 GHz, 14 dBm CMOS Power Amplifier Using 0.18 $mu {rm m}$ Common-Source MOSFETs

Publication Year: 2008, Page(s):755 - 757
Cited by:  Papers (15)
| |PDF (332 KB) | HTML

A Ka-band three-stage CMOS power amplifier was designed and fabricated using 0.18 mum gate-length common-source transistors. For low loss and accurate matching networks for the amplifier, a substrate-shielded microstrip-line was used with good modeling accuracy up to 40 GHz. The measured insertion loss was 0.5 dB/mm at 25 GHz. The three-stage amplifier achieved a 14.5 dB small-signal gain, 14 dBm ... View full abstract»

• ### Impact of Power Amplifier Long Term Memory Effects in Spatial Derivative Superposition Systems

Publication Year: 2008, Page(s):758 - 760
Cited by:  Papers (1)
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In this letter, the impact of power amplifier (PA) long term memory effects on intermodulation distortion cancellation performance of spatial derivative superposition systems is evaluated. Employing a behavioral model derived from Volterra series analysis, these important nonlinear dynamic effects could be taken into account for evaluating the impairment of the linear characteristics sought in the... View full abstract»

• ### IEEE Microwave and Wireless Components Letters reviewers list

Publication Year: 2008, Page(s): C3
| |PDF (26 KB)

## Aims & Scope

The IEEE Microwave and Wireless Components Letters (MWCL) publishes three page papers that focus on microwave theory, techniques and applications as they relate to components, devices, circuits, biological effects, and systems involving the generation, modulation, demodulation, control, transmission, and detection of microwave signals.

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## Meet Our Editors

Editor in Chief
N. Scott Barker
Dept. Elect. Comp. Eng.
University of Virginia
Charlottesville, VA 22904
barker@virginia.edu
dsk6n@virginia.edu