# IEEE Microwave and Wireless Components Letters

## Filter Results

Displaying Results 1 - 22 of 22

Publication Year: 2010, Page(s):C1 - C4
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• ### IEEE Microwave and Wireless Components Letters publication information

Publication Year: 2010, Page(s): C2
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• ### Transient Behavioral Modeling of Nonlinear I/O Drivers Combining Neural Networks and Equivalent Circuits

Publication Year: 2010, Page(s):645 - 647
Cited by:  Papers (4)
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In this letter, a new method for nonlinear behavioral modeling of high-speed I/O drivers is presented, combining neural networks with driver specific circuit knowledge. In the proposed technique, the circuit knowledge of the driver is exploited to preserve the physical property of the driver. In addition, several neural network sub-models are incorporated into the overall model structure to effect... View full abstract»

• ### Acceleration of LOD-FDTD Method Using Fundamental Scheme on Graphics Processor Units

Publication Year: 2010, Page(s):648 - 650
Cited by:  Papers (12)
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This letter presents the acceleration of locally one-dimensional finite-difference time-domain (LOD-FDTD) method using fundamental scheme on graphics processor units (GPUs). Compared to the conventional scheme, the fundamental LOD-FDTD (denoted as FLOD-FDTD) scheme has its right-hand sides cast in the simplest form without involving matrix operators. This leads to a substantial reduction in floati... View full abstract»

• ### A Low Dispersion Precise Integration Time Domain Method Based on Wavelet Galerkin Scheme

Publication Year: 2010, Page(s):651 - 653
Cited by:  Papers (7)
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To decrease the dispersion error of the precise integration time domain (PITD) method, a new algorithm named the wavelet Galerkin scheme-based PITD (WG-PITD) method is proposed in this letter. The novel method is based on both the wavelet Galerkin scheme and the precise integration technique. The dispersion relation of the WG-PITD method is derived analytically. It is found that the dispersion err... View full abstract»

• ### Extraction of the Model Parameters for the Attenuation in Printed Transmission Lines

Publication Year: 2010, Page(s):654 - 656
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A method for determining the parameters of the frequency-dependent attenuation model for transmission lines fabricated on printed circuit boards is presented in this letter. The proposed method allows the separate characterization of the conductor and dielectric losses even when the conductor losses present nonideal variation with frequency. Moreover, the steps for implementing a complete model fo... View full abstract»

• ### Systematic Modeling and Characterization of a Via-to-SIW Transition

Publication Year: 2010, Page(s):657 - 659
Cited by:  Papers (3)
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A model and parameter extraction method for a via-to-SIW transition is presented. The model is derived from an analysis of experimental data and full-wave simulations, allowing to obtain the equivalent circuit parameters for the via including its interaction with the SIW. It is demonstrated through a careful model-experiment correlation that the application of this method allows the correct repres... View full abstract»

• ### A Novel Ground Resonator Technique to Reduce Common-Mode Radiation on Slot-Crossing Differential Signals

Publication Year: 2010, Page(s):660 - 662
Cited by:  Papers (8)
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By symmetrically placing a pair of open-stub resonators on the slotted reference plane, the radiated emission induced by common-mode noise crossing the slot can be effectively suppressed. The ground resonators provide a shorting path below the slot-crossing differential line for common-mode return current around the resonant frequency and thus avoid the noise to excite the slot line. Based on this... View full abstract»

• ### A Miniaturized Microstrip Balun Constructed With Two $lambda/8$ Coupled Lines and a Redundant Line

Publication Year: 2010, Page(s):663 - 665
Cited by:  Papers (5)
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This work presents a miniaturized balun consisting of two re-entrant coupled line sections with ~ λ/8 length connected by a redundant line with ~ 0.04λ length fabricated by planar PCB technology. The structure of the balun was analyzed to obtain the appropriate lengths of couplers and redundant line for the balun realization. An experimental balun operated at -band was designed and f... View full abstract»

• ### A Novel Tri-Band Branch-Line Coupler With Three Controllable Operating Frequencies

Publication Year: 2010, Page(s):666 - 668
Cited by:  Papers (21)
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A novel branch-line coupler with three controllable operating frequencies is presented for tri-band operation. The tri-band operation is achieved by attaching a matching circuit to each port of the conventional branch-line coupler. Closed-form design equations are derived. For verification, a microstrip 3 dB branch-line coupler operating at 0.9/2/2.45 GHz is designed, fabricated and measured. The ... View full abstract»

• ### Frequency Response Control in Frequency-Tunable Bandstop Filters

Publication Year: 2010, Page(s):669 - 671
Cited by:  Papers (29)
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This letter presents a tunable bandstop filter with the capability of controlling the shape of the frequency response. The proposed filter structure can be tuned to have either a Butterworth or a Chebyshev response. The filter can also be tuned to have different center frequencies. Both the frequency response and the center frequency of the filter can be tuned by only adjusting the resonant freque... View full abstract»

• ### A Ka-Band Low Noise Amplifier Using Forward Combining Technique

Publication Year: 2010, Page(s):672 - 674
Cited by:  Papers (9)  |  Patents (1)
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This letter presents a wideband low noise amplifier (LNA) implemented in 0.15 μm InGaAs pHEMT technology. The forward combining technique is proposed to boost the amplifier gain at Ka band. Through gain enhancement, the noise characteristic of the amplifier can also be reduced. The Ka-band LNA exhibits a very wide 3 dB bandwidth from 29 to 44 GHz with the power gain of 14.2 dB. The measured... View full abstract»

• ### LC-VCO Design With Dual- ${rm G} _{rm m}$, Boosted for RF Oscillation and Attenuated for LF Noise

Publication Year: 2010, Page(s):675 - 677
Cited by:  Papers (8)  |  Patents (1)
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A VCO topology with a high at RF and low gm at low frequencies (LF) is presented. A high gm(RF) improves start-up conditions, and a low gm(LF) enables a significant improvement of the phase noise and the power supply rejection. The VCO with a modified prescaler was implemented in 0.25 μm CMOS technology. The measured phase is at 1 MH offset, when the VCO works at 3 GHz and consumes 7.5 mW. ... View full abstract»

• ### A Low Power 77 GHz Low Noise Amplifier With an Area Efficient RF-ESD Protection in 65 nm CMOS

Publication Year: 2010, Page(s):678 - 680
Cited by:  Papers (11)
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An area efficient electrostatic discharge (ESD) protection structure is presented to protect the RF input PAD of a 77 GHz low noise amplifier in a 65 nm CMOS process. The results show a measured small signal gain of 10.5 dB at 77 GHz with 37 mW dc power consumption. The measured noise figure at 77 GHz is 7.8 dB. The proposed RF-ESD protection co-design using an inductive cancellation method can ha... View full abstract»

• ### An Ultra-Low-Power 24 GHz Low-Noise Amplifier Using 0.13 $mu{rm m}$ CMOS Technology

Publication Year: 2010, Page(s):681 - 683
Cited by:  Papers (12)
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This study presents an ultra-low-power 24 GHz low-noise amplifier (LNA) using 0.13 μm CMOS technology. We propose of using the minimum noise measure (MMIN) as the guideline to determine the optimal bias and geometry of the transistors in the circuit. The power-constrained simultaneous noise and input matching (PCSNIM) technique is also employed for this design. With the proposed ... View full abstract»

• ### An Efficiency-Improved Outphasing Power Amplifier Using RF Pulse Modulation

Publication Year: 2010, Page(s):684 - 686
Cited by:  Papers (3)
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This letter presents a method for improving the efficiency of an outphasing amplifier by pulse modulating the input signals. By pulse modulating the two input signals to the outphasing amplifier, the outphasing angle can be kept small and hence attain higher efficiency. Whereas, compared to a pulse modulated polar transmitter, the need for high resolution pulsewidth modulation is reduced. To valid... View full abstract»

• ### The Layout Geometry Dependence of the Power Cells on Performances and Reliability

Publication Year: 2010, Page(s):687 - 689
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The performances and reliability of the NMOS power cells for power amplifiers (PA) were proposed. The performances of power cells with different layout geometries have been compared. The drain current degradation of the NMOS transistors due to hot-carrier effect and high RF power stresses induced by the load impedance mismatches was also present in this work. The load mismatch factors at fundament... View full abstract»

• ### 100 GHz Parametric CMOS Frequency Doubler

Publication Year: 2010, Page(s):690 - 692
Cited by:  Papers (8)
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A parametric MOS varactor-based integrated frequency doubler is reported. The circuit is implemented in 130 nm CMOS but uses a conservative 0.35 μm gate length and produces an output between 94 and 108 GHz with a minimum measured conversion loss of 14.5 dB and a maximum output power of -7.5 dBm. Slow-wave transmission line filters are employed to reduce circuit loss and the area required by... View full abstract»

• ### A 30 GHz Active Quasi-Circulator With Current-Reuse Technique in $0.18~mu{rm m}$ CMOS Technology

Publication Year: 2010, Page(s):693 - 695
Cited by:  Papers (20)
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An active quasi-circulator at 30 GHz is designed and fabricated in TSMC RF mixed signal CMOS technology. The current-reuse technique is integrated with a common-source stage to form the quasi-circulator core while reducing the power consumption at the same time. The transmitter-to-receiver leakage is alleviated by the out-of-phase cancellation of signals from two paths. The isolation and insertion... View full abstract»

• ### A Microwave Method for Accurate and Stable Retrieval of Constitutive Parameters of Low- and Medium-Loss Materials

Publication Year: 2010, Page(s):696 - 698
Cited by:  Papers (11)
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A promising microwave non-resonant method has been proposed for accurate constitutive parameter measurement of magnetic materials. The method eliminates the undesired ripples in the extracted parameters by using a medium-loss reference sample and employing one reflection and one transmission measurements. In addition, it is non-iterative and based on point-by-point (frequency-by-frequency) extract... View full abstract»

• ### 2010 Index IEEE Microwave and Wireless Components Letters Vol. 20

Publication Year: 2010, Page(s):699 - 728
| |PDF (341 KB)
• ### IEEE Microwave and Wireless Components Letters information for authors

Publication Year: 2010, Page(s): C3
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## 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