# IEEE Microwave and Wireless Components Letters

## Filter Results

Displaying Results 1 - 25 of 29

Publication Year: 2009, Page(s): C1
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• ### IEEE Microwave and Wireless Components Letters publication information

Publication Year: 2009, Page(s): C2
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• ### FDTD Modeling for Dispersive Media Using Matrix Exponential Method

Publication Year: 2009, Page(s):53 - 55
Cited by:  Papers (6)
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This letter presents a finite-difference time-domain formulation to model electromagnetic wave propagation in dispersive media using matrix exponential method. The Maxwell's curl equations and the time domain relations between electric fields and auxiliary variables are formulated as a first order differential matrix system. The fundamental solution to such a system is derived in terms of matrix e... View full abstract»

• ### LOD-BOR-FDTD Algorithm for Efficient Analysis of Circularly Symmetric Structures

Publication Year: 2009, Page(s):56 - 58
Cited by:  Papers (11)
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The unconditionally stable locally 1-D (LOD) scheme is used to develop an efficient implicit body-of-revolution (BOR) finite-difference time-domain (FDTD) method. In the LOD-BOR-FDTD, the number of arithmetic operations of the resultant finite-difference equations is significantly reduced, when compared with the alternating-direction implicit (ADI) BOR-FDTD. Numerical results of circular cavity re... View full abstract»

• ### Stable Parametric Macromodeling Using a Recursive Implementation of the Vector Fitting Algorithm

Publication Year: 2009, Page(s):59 - 61
Cited by:  Papers (14)
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A novel least-squares fitting technique is presented for the macromodeling of parameterized frequency responses. Such parametric macromodel can be used for the design, study, and optimization of microwave structures. A key benefit of the proposed method, is that the poles of the macromodel are guaranteed stable by construction. This can easily be enforced when using the presented macromodel repres... View full abstract»

• ### A 3-D Spectral Integral Method (SIM) for Surface Integral Equations

Publication Year: 2009, Page(s):62 - 64
Cited by:  Papers (7)
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An efficient 3-D spectral integral method (SIM) has been proposed to speed up the method of moments (MOM) calculation of induced currents on a cuboid. This method utilizes the Toeplitz structure in the impedance matrix and the fast Fourier transform to accelerate the MOM solution. It reduces the memory and CPU time per iteration from O(N 2) in the MOM to O(N ... View full abstract»

• ### A Spectral Approach to Frequency-Domain Sensitivity Analysis of Multiconductor Transmission Lines

Publication Year: 2009, Page(s):65 - 67
Cited by:  Papers (7)
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Frequency-domain sensitivity analysis of multiconductor transmission lines is derived from the spectral form of the Green's function of the 1-D wave propagation problem. It enables efficient sensitivity analysis of interconnects with respect to both electrical and physical transmission line parameters, completely avoiding decoupling or similarity transformation. View full abstract»

• ### Hybrid Use of AWE With Spatial Matrix Interpolation in the Analysis of Printed Structures

Publication Year: 2009, Page(s):68 - 70
Cited by:  Papers (2)
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In the asymptotic waveform evaluation (AWE) method, most of the CPU time is spent in the generation of the method of moment (MoM) matrix and its derivatives. In this letter, the hybrid use of the AWE method with the spatial interpolation of the MoM matrix is introduced to reduce the matrix generation time. The numerical results demonstrate the efficiency and the accuracy of the proposed technique. View full abstract»

• ### An EM-Coupled Triangular Open-Loop Filter With Transmission Zeros Very Close to Passband

Publication Year: 2009, Page(s):71 - 73
Cited by:  Papers (14)
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This letter presents a novel EM mixed coupled triangular resonator filter with a backed aperture. Strong and controllable electric and magnetic coupling is constructed to realize transmission zeros very close to passband. Simulation and measurement results show good performances of the proposed filter such as low insertion loss, high rejection levels, as well as asymmetric characteristics. The fab... View full abstract»

• ### Effective Design of Novel Compact Fractal-Shaped Microstrip Coupled-Line Bandpass Filters for Suppression of the Second Harmonic

Publication Year: 2009, Page(s):74 - 76
Cited by:  Papers (18)
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Novel compact fractal-shaped microstrip coupled-line bandpass filters employing Koch curves for suppression of the second harmonic are proposed, and their effective design procedure is provided. The proposed filters are implemented and measured, and the measurement results show the proposed filters achieved a maximum harmonic suppression of more than 60 dB, and a maximum circuit size reduction of ... View full abstract»

• ### A Dual-Frequency Transformer for Complex Impedances With Two Unequal Sections

Publication Year: 2009, Page(s):77 - 79
Cited by:  Papers (41)
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In this letter, a small dual-frequency transformer with two unequal sections for complex impedances is proposed. To design this transformer, two different groups of nonlinear equations and the corresponding solutions processes are obtained. The results of numerical examples show that two complex impedances can be matched at two different frequencies simultaneously. This proposed transformer can be... View full abstract»

• ### A Novel GCPW to Rectangular Waveguide Transition for 60 GHz Applications

Publication Year: 2009, Page(s):80 - 82
Cited by:  Papers (9)
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A new type of grounded coplanar waveguide (GCPW) to rectangular waveguide transition in an LTCC multi-layer structure for 60 GHz applications is proposed in this letter. The GCPW and rectangular waveguide are fully integrated on the same substrate, and the ground wall of the rectangular waveguide is made up of a staggered via fence. The transition is accomplished by inserting a bent short stub. We... View full abstract»

• ### A CMOS UWB Pulse Generator for 6–10 GHz Applications

Publication Year: 2009, Page(s):83 - 85
Cited by:  Papers (56)  |  Patents (2)
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A CMOS ultra wideband (UWB) pulse generator with low energy dissipation and high peak amplitude is presented for 6-10 GHz applications. The pulse generator complies with the FCC spectral mask for indoor UWB systems. It consists of a glitch generator, a pulsed oscillator, and a pulse shaping filter. The pulsed oscillator is switched on by the glitch signal only for a short duration, so as to make a... View full abstract»

• ### Process-Dependence of the Even-Order Nonlinearity in Anti-Parallel Diode Pair Mixers

Publication Year: 2009, Page(s):86 - 88
Cited by:  Papers (2)
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Diode mismatch in an anti-parallel diode mixer can generate a product at the second-harmonic of the local oscillator frequency. This product is referred to as the virtual local oscillator leakage. Variability in the fabrication process results in diode mismatch and is noticeable as an asymmetry in the current-voltage characteristics. Its impact on the virtual local oscillator leakage is analyzed b... View full abstract»

• ### A Highly Linear Wideband Up-Conversion Differential CMOS Micromixer Using IMD3 Cancellation for a Digital TV Tuner IC

Publication Year: 2009, Page(s):89 - 91
Cited by:  Papers (5)
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In this letter, a highly linear wideband up-conversion differential CMOS micromixer with a linearized transconductor employing a third order intermodulation (IMD3) cancellation technique for a digital TV tuner IC is proposed and designed. It is fabricated in a 0.18 mum CMOS process and draws 22 mA from a 1.8 V supply voltage. It shows a voltage gain of more than 6 dB, a noise figure lower than 11.... View full abstract»

• ### A Low Voltage Mixer With Improved Noise Figure

Publication Year: 2009, Page(s):92 - 94
Cited by:  Papers (24)
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A 5.2 GHz low voltage mixer with improved noise figure using TSMC 0.18 mum CMOS technology is presented in this letter. This mixer utilizes current reuse and ac-coupled folded switching to achieve low supply voltage. The noise figure of the mixer is strongly influenced by flicker noise. A resonating inductor is implemented for tuning out the parasitic components, which not only can improve noise f... View full abstract»

• ### A 10–40 GHz Broadband Subharmonic Monolithic Mixer in 0.18 $mu$ m CMOS Technology

Publication Year: 2009, Page(s):95 - 97
Cited by:  Papers (11)
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A 10-40 GHz broadband subharmonic monolithic passive mixer using the standard 0.18 mum CMOS process is demonstrated. The proposed mixer is composed of a two-stage Wilkinson power combiner, a short stub and a low-pass filter. Likewise, the mixer utilizes a pair of anti-parallel gate-drain-connected diodes to achieve subharmonic mixing mechanism. The two-stage Wilkinson power combiner is used to exc... View full abstract»

• ### W-Band Active Down-Conversion Mixer in Bulk CMOS

Publication Year: 2009, Page(s):98 - 100
Cited by:  Papers (21)
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A W-band (76-77 GHz) active down-conversion mixer has been demonstrated using low leakage (higher VT) NMOS transistors of a 65-nm digital CMOS process with 6 metal levels. It achieves conversion gain of -8 dB at 76 GHz with a local oscillation power of 4 dBm ( ~ -2 dBm after de-embedding the on-chip balun loss), and 3 dB bandwidth of 3 GHz. The SSB noise figures are 17.8-20 dB (11.3-13.... View full abstract»

• ### A 320–360 GHz Subharmonically Pumped Image Rejection Mixer Using Planar Schottky Diodes

Publication Year: 2009, Page(s):101 - 103
Cited by:  Papers (17)
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This letter presents the design, fabrication and test of an integrated 320-360 GHz subharmonic image rejection mixer using planar Schottky diodes. The integrated circuit uses two separate anti-parallel pairs of diodes mounted onto a single quartz-based circuit. Measurement results give best single sideband (SSB) receiver noise temperatures of approximately 3400 K at 340 GHz, with an image rejectio... View full abstract»

• ### A 1.8 V 900 $\mu$ W 4.5 GHz VCO and Prescaler in 0.18 $\mu$m CMOS Using Charge-Recycling Technique

Publication Year: 2009, Page(s):104 - 106
Cited by:  Papers (14)  |  Patents (3)
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This letter presents a charge-recycling VCO and divider in 0.18 mum CMOS technology. The power consumption of the proposed circuit is significantly reduced by stacking the low-voltage divider on the top of the low-voltage VCO, and hence, the VCO reuses the current from the divider. To enhance the reliability of the proposed circuit under supply voltage variation, transistor sharing and adaptive bo... View full abstract»

• ### A V-Band Parallel-Feedback Oscillator With a Micromachined Cavity Integrated on a Thin-Film Substrate

Publication Year: 2009, Page(s):107 - 109
Cited by:  Papers (7)
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This letter presents a V-band cavity oscillator based on a thin-film substrate with a flip-chip interconnection. A cavity serves as a parallel-feedback element, which is fabricated using a micromachining technique and is flip-chip mounted on a thin-film substrate with integrated passives. A GaAs pseudomorphic high electron-mobility transistor is flip-chip mounted on the thin-film substrate as an a... View full abstract»

• ### A Broadband Balanced Distributed Frequency Doubler With a Sharing Collector Line

Publication Year: 2009, Page(s):110 - 112
Cited by:  Papers (15)
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A broadband balanced distributed frequency doubler fabricated by 0.35 mum SiGe BiCMOS technology is developed to operate from 4 to 18 GHz output frequency. This balanced doubler consists of an active balun and a distributed doubler. A sharing collector line is used in the balanced distributed doubler to reduce the chip size. This circuit exhibits a measured conversion loss of less than 8 dB and a ... View full abstract»

• ### LC-Tank Colpitts Injection-Locked Frequency Divider With Even and Odd Modulo

Publication Year: 2009, Page(s):113 - 115
Cited by:  Papers (20)
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A new injection-locked frequency divider (ILFD) using a standard 0.18 mum CMOS process is presented. The ILFD is based on a differential Colpitts voltage controlled oscillator (VCO) with a direct injection MOSFET for coupling an external signal to the resonators. The VCO is composed of two single-ended VCOs coupled with two transformers. Measurement results show that at the supply voltage of 1.4 V... View full abstract»

• ### A Low-Power Low-Noise Amplifier for K-Band Applications

Publication Year: 2009, Page(s):116 - 118
Cited by:  Papers (25)
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This study presents a high performance K-band low noise amplifier. By utilizing transformer feedback at the input stage, an excellent noise figure (NF) of 4.3 dB is obtained at 22 GHz. With the current-reused technique between the two stages, the amplifier achieves a maximum power gain of 10.1 dB under a supply voltage of 1.8 V and a power consumption of only 7.2 mW. The proposed LNA has comparabl... View full abstract»

• ### Performance of On-Body Chest-to-Waist UWB Communication Link

Publication Year: 2009, Page(s):119 - 121
Cited by:  Papers (24)
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On-body area ultra wideband (UWB) communication is promising for biomedical applications. In this letter, the performance of an on-body UWB chest-to-waist link, which corresponds to a communication link from a biotical sensor at the chest to a coordinator receiver at the waist, is investigated. The channel model is first derived based on the frequency-dependent finite difference time domain method... 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