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# IEEE Microwave and Wireless Components Letters

## Filter Results

Displaying Results 1 - 21 of 21

Publication Year: 2011, Page(s):C1 - C4
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• ### IEEE Microwave and Wireless Components Letters publication information

Publication Year: 2011, Page(s): C2
| PDF (44 KB)
• ### A Laguerre-FDTD Formulation for Frequency-Dependent Dispersive Materials

Publication Year: 2011, Page(s):225 - 227
Cited by:  Papers (15)
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In this letter, Laguerre finite-difference time domain (FDTD) formulation for linear dispersive materials is proposed. Laguerre-FDTD is a time-domain method using Laguerre polynomials that ensures unconditional stability. Being free from Courant-Friedrich-Lewy (CFL) stability condition, Laguerre-FDTD is advantageous in the simulation of multiscale structures. The derived formulation has been imple... View full abstract»

• ### FDTD Computational Study of Ultra-Narrow TM Non-Paraxial Spatial Soliton Interactions

Publication Year: 2011, Page(s):228 - 230
Cited by:  Papers (3)
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We consider the interaction between two (1+1)D ultra-narrow optical spatial solitons in a nonlinear dispersive medium using the finite-difference time-domain (FDTD) method for the transverse magnetic (TM) polarization. The model uses the general vector auxiliary differential equation (GVADE) approach to include multiple electric-field components, a Kerr nonlinearity, and multiple-pole Lorentz and ... View full abstract»

• ### Double-Band Tunable Magnetic Conductor Realized by a Grounded Ferrite Slab Covered With Metal Strip Grating

Publication Year: 2011, Page(s):231 - 233
Cited by:  Papers (2)
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The property of a perfect magnetic conductor (PMC) boundary is achieved at two frequency bands by using Faraday rotation in a grounded ferrite slab covered with a metal strip grating. The PMC boundary condition is obtained for the wave polarized perpendicularly to the strips. The two frequency bands correspond to 45° and 90° Faraday rotation across the slab, respectively. In the form... View full abstract»

• ### A Micromachined Terahertz Waveguide 90 $^{circ}$ Twist

Publication Year: 2011, Page(s):234 - 236
Cited by:  Papers (14)
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Waveguide twists are often necessary to provide polarization rotation between waveguide-based components. At terahertz frequencies, it is desirable to use a twist design that is compact in order to reduce loss; however, these designs are difficult if not impossible to realize using standard machining. This paper presents a micromachined compact waveguide twist for terahertz frequencies. The Rud-Ki... View full abstract»

• ### Ku Band High-Q Tunable Surface-Mounted Cavity Resonator Using RF MEMS Varactors

Publication Year: 2011, Page(s):237 - 239
Cited by:  Papers (12)  |  Patents (1)
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This paper presents a 14 GHz high-Q (quality factor) tunable resonator using microelectromechanical system (MEMS) varactors. A brass surface mountable cavity has been bonded on a fused silica wafer on which are processed three 1.1 mm long MEMS varactors. Their location has been optimized in order to obtain a wide frequency shift, when the cantilevers are actuated on the substrate. 15% tuning range... View full abstract»

• ### Novel Compact and Low-Loss Phase Shifters With Magnetodielectric Disturber

Publication Year: 2011, Page(s):240 - 242
Cited by:  Papers (12)  |  Patents (1)
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Magnetodielectric materials show great potential in tunable phase shifter designs with their high relative permeability and high permittivity. This paper presents a novel compact and low-loss tunable S-band phase shifter with a magnetodielectric perturber on a meander line microstrip controlled by a piezoelectric transducer. Compared with traditional dielectric perturbation, the phase tunability o... View full abstract»

• ### Split Ring Resonators (SRRs) Based on Micro-Electro-Mechanical Deflectable Cantilever-Type Rings: Application to Tunable Stopband Filters

Publication Year: 2011, Page(s):243 - 245
Cited by:  Papers (26)
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A new principle for the implementation of tunable split ring resonators (SRRs) is presented. The rings forming the SRRs are partly fixed to the substrate (anchor) and partly suspended (up-curved cantilever). Through electrostatic actuation, the suspended parts are deflected down, the distributed capacitance between the pair of coupled rings is modified, and hence the resonance frequency of the SRR... View full abstract»

• ### Integrated Dual-Band Radiating Bandpass Filter Using Dual-Mode Circular Cavities

Publication Year: 2011, Page(s):246 - 248
Cited by:  Papers (16)  |  Patents (1)
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A new technique for the design of integrated dual-band multilayer substrate integrated waveguide (SIW) bandpass filter and microstrip antenna is presented. The design is based on a dual-mode TM110 circular cavity structure, where two orthogonal modes co-exist in a single layer. The first layer has the first resonator for each band, and the second layer has the second radiating resonator... View full abstract»

• ### Design of Microwave Lossy Filter Based on Substrate Integrated Waveguide (SIW)

Publication Year: 2011, Page(s):249 - 251
Cited by:  Papers (12)
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In this letter, we propose a lossy three-pole Chebyshev filter centered at 5.15 GHz, based on the substrate integrated waveguide (SIW) with scattering characteristics shifted down by 5.68 dB. The filter is composed of three directly coupled SIW cavities with three lossy couplings between nonadjacent resonators. These additional couplings are realized using mixed coupled slot and microstrip lines c... View full abstract»

• ### Design of a Substrate Integrated Waveguide Balun Filter Based on Three-Port Coupled-Resonator Circuit Model

Publication Year: 2011, Page(s):252 - 254
Cited by:  Papers (15)
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A novel balun filter is proposed using the substrate integrated waveguide (SIW) technique, which is designed with a three-port coupled-resonator circuit model. Considering the loading effect of other resonators, a modified balanced resonant mode in a higher-order SIW cavity is utilized to provide both a negative cross-coupling and the conversion from an unbalanced signal to a balanced one. Our dev... View full abstract»

• ### Miniature Harmonic-Suppressed Microstrip Bandpass Filter Using a Triple-Mode Stub-Loaded Resonator and Spur Lines

Publication Year: 2011, Page(s):255 - 257
Cited by:  Papers (24)
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A miniature harmonic-suppressed microstrip band pass filter (BPF) with a new triple-mode stub-loaded resonator is presented in this letter. Four distinct mechanisms are utilized to create five transmission zeros (TZs), leading to sharp skirts and wide stopband. Both simulation and measurement results are presented. The simulated/measured minimum passband insertion loss is 0.66 dB/0.78 dB and the 2... View full abstract»

• ### Simple and Efficient High-Dimensional Parametric Modeling for Microwave Cavity Filters Using Modular Neural Network

Publication Year: 2011, Page(s):258 - 260
Cited by:  Papers (4)
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This letter presents a simple and efficient high-dimensional parametric model of microwave cavity filters utilizing a modular neural network technique. The filter structure is decomposed into several parts, and a set of neural networks are trained to learn the behavior of the filter parts. These neural networks considered as submodels, are then combined and incorporated into the final model struct... View full abstract»

• ### A Compact UWB Bandpass Filter With Embedded SIR as Band Notch Structure

Publication Year: 2011, Page(s):261 - 263
Cited by:  Papers (45)
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In this letter, an ultrawideband (UWB) bandpass filter with a band notch is proposed. The UWB BPF (3.1-10.6 GHz) is realized by cascading a distributed high-pass filter and an elliptic low-pass filter with an embedded stepped impedance resonator (SIR) to achieve a band notch characteristic. The notch band is obtained at 5.22 GHz. It is shown that the notch frequency can be tuned by changing the im... View full abstract»

• ### A 325 GHz InP HBT Differential-Mode Amplifier

Publication Year: 2011, Page(s):264 - 266
Cited by:  Papers (8)
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An MMIC amplifier operating at the highest reported frequency up to date for indium-phosphide double-heterojunction bipolar (DHBT) transistor technology is presented. The amplifier chain consists of seven unit-cell stages that contain differential-pair common-base HBTs and compact inverted microstrip matching networks. Amplifier operation in differential mode generates a virtual RF ground at a con... View full abstract»

• ### Sub-Micron Area Heterojunction Backward Diode Millimeter-Wave Detectors With 0.18 ${rm pW/Hz}^{1/2}$ Noise Equivalent Power

Publication Year: 2011, Page(s):267 - 269
Cited by:  Papers (47)  |  Patents (2)
| | PDF (476 KB) | HTML

InAs/AlSb/AlGaSb heterojunction backward diodes are promising detectors for millimeter-wave imaging applications due to their high sensitivity, low noise, and high cutoff frequency. By using a device heterostructure with a thin (11 Å) barrier layer, δ-doped cathode, and optimized AlxGa1-xSb anode composition (x=12%), in conjunction with submicron (0.4×0.4... View full abstract»

• ### A 45 GHz CMOS VCO Adopting Digitally Switchable Metal-Oxide-Metal Capacitors

Publication Year: 2011, Page(s):270 - 272
Cited by:  Papers (3)
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A 45 GHz millimeter-wave (MMW) VCO adopting digitally switchable metal-oxide-metal (MOM) capacitors as the tuning element is described in this work. The MOM capacitor is designed to have discrete capacitance values in order to extend frequency tuning range. The MMW VCO with the switchable MOM capacitor demonstrates an operation frequency ranging from 43.5 to 45.5 GHz. The measured phase noise at 3... View full abstract»

• ### Waveguide Dielectric Permittivity Measurement Technique Based on Resonant FSS Filters

Publication Year: 2011, Page(s):273 - 275
Cited by:  Papers (10)
| | PDF (368 KB) | HTML

A method to determine the dielectric permittivity of materials is presented. Such a method exploits the use of a low-cost frequency selective structure (FSS), transversally placed in a waveguide in the proximity of the sample under test. The presence of the additional dielectric placed close to the FSS leads to a shift of bandpass and bandstop resonance frequencies. The relationship between the fr... View full abstract»

Publication Year: 2011, Page(s): 276
| PDF (188 KB)
• ### IEEE Microwave and Wireless Components Letters Reviewers List

Publication Year: 2011, Page(s): C3
| PDF (162 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.

Full Aims & Scope

## 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