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IEEE Microwave and Wireless Components Letters

Issue 10 • Date Oct. 2006

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  • Table of contents

    Publication Year: 2006, Page(s): c1
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  • IEEE Microwave and Wireless Components Letters publication information

    Publication Year: 2006, Page(s): c2
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  • Solutions to the two-dimensional boundary value problem for microwave breast tumor detection

    Publication Year: 2006, Page(s):525 - 527
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB) | HTML iconHTML

    This letter presents a noninvasive microwave application method for breast tumor detection. Forward equations are developed using the signals' scattering effect at the presence of an object inside the breast model. It is shown how the complex backscattered signals which characterize the internal material properties are analyzed using cylindrical coordinates to obtain required information. The algo... View full abstract»

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  • A FDTD-based modal PML

    Publication Year: 2006, Page(s):528 - 530
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (162 KB) | HTML iconHTML

    The finite-difference time-domain (FDTD) method is one of the most popular numerical methods for solving electromagnetic problems because of its algorithmic simplicity and flexibility. For an open waveguide structure, modal perfectly matched layer (PML) schemes have been developed as efficient absorbing terminations. However, since these PML schemes are not derived directly from the FDTD algorithm... View full abstract»

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  • Unstructured PEEC formulation by dual discretization

    Publication Year: 2006, Page(s):531 - 533
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (217 KB) | HTML iconHTML

    This letter presents a new lumped parameter approach for the solution of the electromagnetic problem of a system of conductors lying in a homogeneous region. By exploiting duality relations between two systems of meshes, an equivalent network of lumped parameters is obtained. This approach is conceptually equivalent to the partial element equivalent circuit formulation but it can overcome the limi... View full abstract»

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  • Hybrid analytical modeling of noise coupling to signal traces in a power bus with embedded film capacitor

    Publication Year: 2006, Page(s):534 - 536
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (402 KB) | HTML iconHTML

    An accurate hybrid analytical method is proposed to determine the coupling of switching noise to signal traces in a multilayer power bus with embedded film capacitor. We used the induction equivalent theorem to derive the solution of noise coupling and the segmentation method to calculate the electric field of the noise in a power bus. The proposed method was verified by measurements of impedance ... View full abstract»

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  • Transmission-line directional couplers for impedance transforming

    Publication Year: 2006, Page(s):537 - 539
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (347 KB) | HTML iconHTML

    Normalized scattering parameters of a two-port circuit terminated in arbitrary impedances are derived and design equations of directional couplers for impedance transforming are derived. To verify the design equations, a microstrip directional coupler is designed at a center frequency of 2GHz, fabricated on a substrate (epsivr=3.5,H= 30mil, tandelta= 0.04) and measured. The measured per... View full abstract»

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  • Compact bandpass filters with wide controllable fractional bandwidth

    Publication Year: 2006, Page(s):540 - 542
    Cited by:  Papers (45)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (263 KB) | HTML iconHTML

    In this letter, complementary split ring resonators (CSRR) are proposed to design bandpass filters (BPFs) having wide controllable 3-dB fractional bandwidth (FBW). FBW can be varied between 10% and 100%. In addition, filters have the advantages of compactness, sharp rejection, low insertion loss (IL), and low cost. Two prototype fabricated filters of FBW 10.8% and 81.6% show a maximum passband IL ... View full abstract»

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  • On the electrical characteristics of complementary metamaterial resonators

    Publication Year: 2006, Page(s):543 - 545
    Cited by:  Papers (87)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (259 KB) | HTML iconHTML

    In this letter, a method to obtain the electrical characteristics of complementary split ring resonators (CSRRs) coupled to planar transmission lines is presented. CSRRs have been recently proposed by some of the authors as new constitutive elements for the synthesis of metamaterials with negative effective permittivity, and they have been applied to the fabrication of metamaterial-based circuits ... View full abstract»

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  • Miniaturized CBCPW bandpass filter basedon thin film polyimide on lossy silicon

    Publication Year: 2006, Page(s):546 - 548
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (159 KB) | HTML iconHTML

    This letter reports a miniaturized conductor-backed coplanar waveguide (CBCPW) bandpass filter (BPF) based on a thin film polyimide layer coated on a lossy silicon. With a 20-mum-thick polyimide interface layer and back metallization, the interaction of electromagnetic fields with the lossy silicon substrate has been isolated, and as a result low-loss and low-dispersive CBCPW line has been obtaine... View full abstract»

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  • Tunable BST capacitor loss compensation using active circuit

    Publication Year: 2006, Page(s):549 - 551
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB) | HTML iconHTML

    The compensation of the ohmic and the material dielectric losses in a barium strontium titanate (BST) capacitor using an active circuit is reported in this letter. The negative resistance (NR) circuit creates an effective conductance of -|Gn| which adds to the positive conductance of the passive BST-based tuned capacitor. As a result, the compensation of the losses is significantly impr... View full abstract»

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  • A low-phase-noise K-band CMOS VCO

    Publication Year: 2006, Page(s):552 - 554
    Cited by:  Papers (45)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (293 KB) | HTML iconHTML

    A novel circuit topology for low-phase-noise voltage controlled oscillators (VCOs) is presented in this letter. By employing a PMOS cross-coupled pair with a capacitive feedback, superior circuit performance can be achieved especially at higher frequencies. Based on the proposed architecture, a prototype VCO implemented in a 0.18-mum CMOS process is demonstrated for K-band applications. From the m... View full abstract»

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  • A 140-GHz fundamental mode voltage-controlled oscillator in 90-nm CMOS technology

    Publication Year: 2006, Page(s):555 - 557
    Cited by:  Papers (42)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB) | HTML iconHTML

    Fundamental mode voltage-controlled oscillators in F-band (90-140GHz) were fabricated using the UMC 90-nm logic CMOS process. The maximum operating frequencies of these three oscillators are 110, 123, and 140GHz, respectively. The 140-GHz voltage controlled oscillator provides -22 to -19-dBm output power, a frequency tuning range of 1.2GHz and phase noise of -85dBc/Hz at 2-MHz offset from the carr... View full abstract»

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  • A 15-gb/s 2:1 multiplexer in 0.18-μm CMOS

    Publication Year: 2006, Page(s):558 - 560
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (723 KB) | HTML iconHTML

    By employing the inductive peaking technique and the super-dynamic flip-flops, a 2:1 multiplexer (MUX) is presented for high-speed operations. The proposed circuit is realized in a 0.18-mum CMOS process. With a power consumption of 110mW from a 2-V supply voltage, the fully integrated MUX can operate at an output rate up to 15Gb/s. From the measured eye-diagrams, the 15-Gb/s half-rate MUX exhibits... View full abstract»

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  • A harmonic injection-locked frequency divider in 0.18-μm SiGe BiCMOS

    Publication Year: 2006, Page(s):561 - 563
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (365 KB) | HTML iconHTML

    A harmonic injection-locked frequency divider for high-speed applications is presented in this letter. In order to enhance the bandwidth of the high-order frequency division, a positive feedback is employed in the design of the subharmonic mixer loop. The proposed circuit is implemented in a 0.18-mum SiGe BiCMOS process. With a singled-ended super-harmonic input injection of 0dBm, the frequency di... View full abstract»

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  • A 40-GHz static frequency divider with quadrature outputs in 80-nm CMOS

    Publication Year: 2006, Page(s):564 - 566
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (629 KB) | HTML iconHTML

    The implemented static frequency divider provides quadrature (Q) clock outputs and divides frequencies up to 44GHz. The core divider circuit consists of two current-mode logic (CML) latches and consumes 3.2mW from a 1.1-V supply. The divided outputs result in a peak-to-peak and rms jitter of 6.3 and 0.8ps, respectively, and the maximum phase mismatch between the in-phase (I) and Q-outputs amounts ... View full abstract»

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  • A power re-use technique for improved efficiency of pulsed oscillating amplifiers

    Publication Year: 2006, Page(s):567 - 569
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (132 KB) | HTML iconHTML

    This letter presents a power re-use technique for pulsed oscillating amplifiers. By rectifying the upconverted switching harmonics of the pulsed oscillating output, some portions of wasted power can be returned to the power supply. The efficiency of the amplifier can be enhanced without degradation of the linearity. The measured results show that the overall efficiency of the amplifier with power ... View full abstract»

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    Publication Year: 2006, Page(s): 570
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  • Quality without compromise

    Publication Year: 2006, Page(s): 571
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    Publication Year: 2006, Page(s): 572
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  • IEEE Microwave and Wireless Components Letters Information for authors

    Publication Year: 2006, Page(s): c3
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  • Blank page [back cover]

    Publication Year: 2006, Page(s): c4
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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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