# IEEE Microwave and Wireless Components Letters

## Filter Results

Displaying Results 1 - 25 of 35

Publication Year: 2007, Page(s):C1 - C2
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• ### IEEE Microwave and Wireless Components Letters publication information

Publication Year: 2007, Page(s): C2
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• ### Mixed $E$–$B$ Finite Elements for Solving 1-D, 2-D, and 3-D Time-Harmonic Maxwell Curl Equations

Publication Year: 2007, Page(s):313 - 315
Cited by:  Papers (7)
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Using a unified discretization approach based on differential forms, we describe mixed finite element methods (FEMs) in simplicial grids to solve time harmonic Maxwell curl equations in one-, two-, and three-dimensions. The proposed mixed FEM utilizes the electric field intensity Eoarr and magnetic flux density Boarras simultaneous state variables. Appropriate elements are used as interpolants for... View full abstract»

• ### A Modified High Order FDTD Method Based on Wave Equation

Publication Year: 2007, Page(s):316 - 318
Cited by:  Papers (5)
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A modified (2M, 4) scheme of the high-order two-dimensional finite-difference time-domain (FDTD) method based on wave equation is proposed. It has the fourth-order accuracy in the time domain using the symplectic integrator propagator, and the 2M-order accuracy in the space domain using the discrete singular convolution method. The distinctive features between the modified scheme and the tradition... View full abstract»

• ### Numerical Dispersion Analysis With an Improved LOD–FDTD Method

Publication Year: 2007, Page(s):319 - 321
Cited by:  Papers (43)
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In this letter, a modified locally one-dimensional finite-difference time-domain (LOD-FDTD) method is proposed. The dispersion behavior is investigated and compared with the conventional LOD-FDTD method. It is found that for a Courant-Friedrich-Levy number equal to 5 the modified LOD-FDTD method performs approximately 20% better than the conventional LOD-FDTD method View full abstract»

• ### An Efficient Implementation of the Stretched Coordinate Perfectly Matched Layer

Publication Year: 2007, Page(s):322 - 324
Cited by:  Papers (3)
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An unsplit-field and efficient algorithm to implement the stretched coordinate perfectly matched layer (SC-PML) is proposed for truncating the finite-difference time-domain lattices. The main advantage of the proposed algorithm is that only one auxiliary variable is required in all corners and some edges of the PML regions by means of direct discretizing the second-order differential equation and ... View full abstract»

• ### Conical Double-Dielectric Fresnel Zone Lens and Antenna

Publication Year: 2007, Page(s):325 - 327
Cited by:  Papers (2)
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A conical double-dielectric phase-reversal Fresnel-zone plate (FZP) lens is introduced. We present the lens design equations as functions of cone opening angle. As an example, the phase-reversal lens has been applied to four millimeter-wave antennas with different lens opening semi-angles: 45deg, 60deg, and 75deg (conical lenses) and 90deg (plane lens). The radiation characteristics of these anten... View full abstract»

• ### A Coaxial Bragg Reflector for Cyclotron Autoresonance Maser Oscillators

Publication Year: 2007, Page(s):328 - 330
Cited by:  Papers (20)
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A coaxial Bragg reflector is suggested for the application in the cyclotron autoresonance masers (CARMs), where both the outer wall and inner rod are corrugated with weak axisymmetric-sinusoidal-ripple, and a concept design is presented. It is found that, compared to the cylindrical Bragg reflector, the coaxial Bragg reflector has larger dimensional size, narrower bandwidth, and larger eigenvalue ... View full abstract»

• ### A Novel 3-dB Directional Coupler With Broad Bandwidth and Compact Size Using Composite Right/Left-Handed Coplanar Waveguides

Publication Year: 2007, Page(s):331 - 333
Cited by:  Papers (24)
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A wideband composite right/left-handed (CRLH) coplanar waveguide (CPW) coupler with 3-dB coupling value and quadrature phase difference is presented. Compared with the conventional edge-coupled CPW coupler, this symmetrical structure, consisting of a gap capacitor, a broadside-coupled capacitor, and a meandering short-circuited stub inductor, achieves wider operating bandwidth and larger coupling ... View full abstract»

• ### Synthesis of Cul-De-Sac Filter Networks Utilizing Hybrid Couplers

Publication Year: 2007, Page(s):334 - 336
Cited by:  Papers (8)  |  Patents (4)
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A synthesis procedure is described for the design of Cul-De-Sac networks realizing either bandpass or bandstop filter characteristics. The prototypes comprise a pair of one-port ladder sub-networks each connected at one of the coupled ports of a 3-dB, 90deg or 180deg hybrid coupler. Numerical examples and simulated filter layouts are presented to illustrate the design methodology View full abstract»

• ### General Synthesis of $N$-Band Resonator Based on $N$-Order Dual Behavior Resonator

Publication Year: 2007, Page(s):337 - 339
Cited by:  Papers (15)
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This letter deals with a general method and synthesis devoted to the achievement of N-band resonators. The general topology is based on the dual behavior resonator. Indeed, this kind of topology allows the independent control of different transmission zeros and resonances. Thus, the topology proposed in this study consists of a parallel association of N+1 different bandstop structures to get N ban... View full abstract»

• ### Broadband Cascade Quadruplet Bandpass Filter With Low-Temperature Co-Fired Ceramic Technology

Publication Year: 2007, Page(s):340 - 342
Cited by:  Papers (4)
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The broadband bandpass filter (BPF) designed with low-temperature co-fired ceramic technology has been proposed in this letter. By adopting a quadruple resonator, the broadband BPF with compact size can be fabricated. A quadruple resonator with metal-insulator-metal capacitors is employed to make inductive and capacitive couplings. The coupling scheme can create two transmission zeros at both side... View full abstract»

• ### Miniature CPW Parallel-Coupled Bandpass Filter Based on Inductive Loaded Coupled-Lines and Lumped-Element J-Inverters

Publication Year: 2007, Page(s):343 - 345
Cited by:  Papers (6)
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This study presents a compact coplanar-waveguide (CPW) parallel-coupled bandpass filter (BPF) with good selectivity and stopband rejection. The inductive terminations are introduced to the conventional anti-parallel coupled-lines, and lumped-element J-inverters are employed, to achieve both size reduction and spurious suppression. Additionally, the inductive cross-coupling effect is introduced to ... View full abstract»

• ### Integrated Bandpass Filter at 77 GHz in SiGe Technology

Publication Year: 2007, Page(s):346 - 348
Cited by:  Papers (37)
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The implementation and characterization of an integrated passive bandpass filter at 77GHz is presented. A lumped elements filter occupying very small die area (110times60mum2, without pads) is demonstrated. It is realized with spiral inductors and metal-insulator-metal capacitors. The filter is fabricated in an advanced SiGe:C technology. It has a center frequency of 77.3GHz and a bandw... View full abstract»

• ### An Exploration of Substrate Coupling at K-Band Between a SiGe HBT Power Amplifier and a SiGe HBT Voltage-Controlled-Oscillator

Publication Year: 2007, Page(s):349 - 351
Cited by:  Papers (3)
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This work presents a case study of circuit-to-circuit substrate coupling between a 24-GHz power amplifier (PA) and a 23-GHz voltage-controlled oscillator (VCO) implemented in a commercially-available SiGe heterojunction bipolar transistor BiCMOS technology. The concurrent operation of these two circuits on the same silicon die results in -33dB of coupling between the PA's output and the VCO's outp... View full abstract»

• ### A Novel SiGe PIN Diode SPST Switch for Broadband T/R Module

Publication Year: 2007, Page(s):352 - 354
Cited by:  Papers (17)
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A novel octagonal SiGe p-type intrinsic n-type (PIN) diode single pole single throw (SPST) switch is first implemented in a standard 0.18-mum SiGe BiCMOS technology. Distinctive radio frequency performance of monolithic silicon PIN diode switch is achieved for broadband applications with improvement of its geometry. Over the 2-16GHz frequency band, the PIN diode SPST switch exhibits an insertion l... View full abstract»

• ### 1$/f$ Noise of Sb-Heterostructure Diodes for Pre-Amplified Detection

Publication Year: 2007, Page(s):355 - 357
Cited by:  Papers (6)
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The 1/f noise of a series of Sb-heterostructure diodes with varying area has been measured. Standard power law formulas for the frequency and voltage dependence were found adequate to summarize the data. An inverse dependence of voltage noise spectral density on the area was determined, consistent with the simple resistor model. Simulations using the noise formula predict that pre-amplification ga... View full abstract»

• ### Extraction of Substrate Resistance in Bulk FinFETs Through RF Modeling

Publication Year: 2007, Page(s):358 - 360
Cited by:  Papers (4)
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A new method to extract substrate resistance (Rsub) for small-sized nano-scale metal oxide semiconductor field effect transistors (MOSFETs) including bulk FinFETs is proposed and compared with conventional method. The Rsub's extracted from small-size MOSFETs by using the proposed method are shown to have frequency independent characteristics, unlike those from the conventiona... View full abstract»

• ### Determination and Validation of New Nonlinear FinFET Model Based on Lookup Tables

Publication Year: 2007, Page(s):361 - 363
Cited by:  Papers (34)
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The Fin field effect transistor (FinFET) is a multiple gate structure, which is recently emerging as a leading structure to continue the scaling of CMOS technology into the nanometer regime. This promising multiple gate structure has not only the advantage of reducing short channel effects but also of being compatible with the conventional planar CMOS technology. To our knowledge, this is the firs... View full abstract»

• ### On the RF Extrinsic Resistance Extraction for Partially-Depleted SOI MOSFETs

Publication Year: 2007, Page(s):364 - 366
Cited by:  Papers (8)
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We have investigated the radio frequency (RF) extrinsic resistance extraction for partially-depleted (PD) silicon-on-insulator (SOI) metal-oxide-semiconductor field effect transistors (MOSFETs). Although the thick buried oxide in SOI devices can block the substrate coupling, the SOI neutral-body coupling effect is significant for RF applications. An equivalent circuit considering this effect has b... View full abstract»

• ### A Low Power Folded Mixer for UWB System Applications in 0.18-$mu$m CMOS Technology

Publication Year: 2007, Page(s):367 - 369
Cited by:  Papers (35)
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This letter presents a wideband mixer using a commercial 0.18-mum CMOS technology process for ultra-wideband (UWB) system applications. To achieve wideband frequency response and low dc power consumption for UWB system applications, the folded approach is utilized to reduce supply voltage as well as dc power consumption, and wideband input matching network is used to achieve wideband frequency res... View full abstract»

• ### 10-GHz Highly Symmetrical Sub-Harmonic Gilbert Mixer Using GaInP/GaAs HBT Technology

Publication Year: 2007, Page(s):370 - 372
Cited by:  Papers (13)
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A 10-GHz sub-harmonic Gilbert mixer is demonstrated using GaInP/GaAs hetero-junction bipolar transistor technology. The local oscillator (LO) signal time-delay path in the sub-harmonic LO stage is compensated using the fully symmetrical stacked-LO doubler; therefore, the balance of the sub-harmonic LO stage, the radio frequency to intermediate frequency isolation, and IIP2 are improved.... View full abstract»

• ### A Low Voltage Divide-by-4 Injection Locked Frequency Divider With Quadrature Outputs

Publication Year: 2007, Page(s):373 - 375
Cited by:  Papers (35)  |  Patents (3)
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This letter presents a low voltage quadrature divide-by-4 (divide4) injection-locked frequency divider (QILFD). The QILFD consists of a 1.8-GHz quadrature voltage controlled oscillator (QVCO) and two NMOS switches, which are inserted into the quadrature outputs of the QVCO for signal injection. The low-voltage CMOS divide4 QILFD has been implemented with the TSMC 0.18-mum 1P6 M CMOS technology and... View full abstract»

• ### A Low Voltage and Power $LC$ VCO Implemented With Dynamic Threshold Voltage MOSFETS

Publication Year: 2007, Page(s):376 - 378
Cited by:  Papers (26)  |  Patents (1)
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A 1.1-GHz voltage control oscillator (VCO) using a standard 0.18-mum CMOS 1P6M process is fabricated. The VCO was designed with dynamic threshold voltage metal-oxide-semiconductor field-effect transistors and extremely-low-voltage and low power operation is achieved using on-chip transformers in positive feedback loops to swing the output signals above the supply and below the ground potential. Th... View full abstract»

• ### Extraction Technique of Differential Second Harmonic Output in CMOS $LC$ VCO

Publication Year: 2007, Page(s):379 - 381
Cited by:  Papers (6)
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A technique to extract differential second harmonic output signals in a CMOS LC voltage-controlled oscillator (VCO) is introduced. In a cross-coupled n-type field effect transistor (NFET) and p-channel field effect transistor (PFET) VCO topology, the upper and lower common source nodes of the FET pairs can provide well-balanced differential second harmonic output by resonating the impedances at th... View full abstract»

## 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