# IEEE Microwave and Wireless Components Letters

## Filter Results

Displaying Results 1 - 24 of 24

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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Publication Year: 2009, Page(s):425 - 427
Cited by:  Papers (7)
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In this letter, a circular absorbing boundary using the radial perfectly matched layer (RPML) is investigated for the alternating-direction-implicit finite-difference time-domain (ADI-FDTD) method. A staircase approach is used to approximate the circular boundary so that it is directly compatible with the commonly used Yee's lattice. The proposed RPML boundary is computationally more efficient tha... View full abstract»

• ### Time-Domain Green's Function-Based Sensitivity Analysis of Multiconductor Transmission Lines With Nonlinear Terminations

Publication Year: 2009, Page(s):428 - 430
Cited by:  Papers (6)
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Time-domain sensitivity analysis of multiconductor transmission lines is derived from the dyadic Green's function of the 1-D wave propagation problem. The rational nature of the Green's function permits the generation of a time-domain macromodel for the computation of transient voltage sensitivities with respect to both electrical and physical parameters, completely avoiding similarity transformat... View full abstract»

• ### Enhanced CRLH Transmission Line Performances Using a Lattice Network Unit Cell

Publication Year: 2009, Page(s):431 - 433
Cited by:  Papers (25)
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A novel topology for the composite right/left-handed transmission line (CRLH TL) is presented. This type of CRLH TLs has the advantage of exhibiting an all-pass behavior and a frequency-independent characteristic impedance, in the so-called balanced case. Moreover, it presents a larger group velocity than its conventional counterpart, thereby allowing for wider bandwidth operation. This letter inv... View full abstract»

• ### Microstrip Coupled Line Composite Right/Left-Handed Unit Cell

Publication Year: 2009, Page(s):434 - 436
Cited by:  Papers (24)
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This letter presents a new composite right/left-handed (CRLH) unit cell, which takes advantage of the microstrip coupled line even and odd modes. The new cell does not require vias, it is patterned on a single metal layer, and it has a geometrical circuit model that simplifies the design flow. A novel CRLH transmission line is also proposed. It does not have a cutoff frequency, the operating bandw... View full abstract»

• ### Design of a Low Loss Metallo-Dielectric EBG Waveguide at Submillimeter Wavelengths

Publication Year: 2009, Page(s):437 - 439
Cited by:  Papers (12)
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In this letter we show the viability of using concentric cylindrically-periodic (CP) dielectrics to realize low-loss propagation at submillimeter wavelengths. Most of the power in the CP Waveguide (WG) is confined to an air core propagating a TE01 mode. The TM11 mode degeneracy is removed over a very wide bandwidth by a series of periodically spaced dielectric rings that are ... View full abstract»

• ### Miniaturized Microstrip Wilkinson Power Divider With Harmonic Suppression

Publication Year: 2009, Page(s):440 - 442
Cited by:  Papers (49)
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A microstrip Wilkinson power divider with harmonic suppression and size reduction is presented in this letter. The proposed power divider not only effectively reduces its occupied area to 36.5% of the conventional design at 2.65 GHz but also has higher order harmonics suppression. From the measured results, a 29 dB suppression for the third harmonic and a 34 dB suppression for the fifth harmonic a... View full abstract»

• ### Microstrip Balun Over High Impedance Wire-Ground

Publication Year: 2009, Page(s):443 - 445
Cited by:  Papers (1)
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This letter presents a novel idea for the design of coupled line balun, where the operation relies on rejecting the common mode due to the presence of a high impedance wire-ground. This concept is verified by circuit modeling, EM simulations, and practical measurements of the proposed structure. The simple, though accurate, circuit model provides clear understanding of the concept of operation and... View full abstract»

• ### A Miniaturized Multilayered Marchand Balun Using Coupled Artificial Transmission Lines

Publication Year: 2009, Page(s):446 - 448
Cited by:  Papers (25)
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A miniaturized Marchand balun is investigated in this letter. The Marchand balun is realized on a six-layered printed circuit board by integration of two coupled artificial transmission line sections. An additional artificial line is inserted in-between the coupled lines for compensating the asymmetry. With the help of the even odd mode analysis, the electrical characteristics of the coupled lines... View full abstract»

• ### A Narrow Band Dual Mode HTS Patch Filter With High Power Capability

Publication Year: 2009, Page(s):449 - 451
Cited by:  Papers (8)
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A novel structure is presented to optimize the design of narrow band dual mode patch filters. Using this method, a narrow band dual mode high power HTS filter with center frequency 2.015 GHz, fractional bandwidth less than 0.35%, return loss greater than 20 dB, near band-edge rejection close to -45 dB, and insertion loss less than 0.2 dB has been designed and fabricated. The filter can work at a p... View full abstract»

• ### LTCC Wideband Filter Design With Selectivity Enhancement

Publication Year: 2009, Page(s):452 - 454
Cited by:  Papers (9)
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A new design scheme for the wideband filters with the low temperature co-fired ceramic (LTCC) technology is proposed in this letter. Based on the traditional second-order combline filter, an extra shunt capacitor is added in the middle of the coupled line, and a new transmission zero is thus obtained. The proposed design not only possesses excellent selectivity at both sides of the passband, the f... View full abstract»

• ### 150 GHz Band-Pass Filter Using LTCC Technology

Publication Year: 2009, Page(s):455 - 457
Cited by:  Papers (4)
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A low temperature co-fired ceramic 150 GHz bandpass filter is, for the first time, designed and manufactured. Experimental electric performances are encouraging and validate the use of LTCC technology at submillimeter wave range. A Chebyshev 2-pole bandpass filter is achieved, with 1.6% bandwidth and 4.6 dB insertion loss. The unloaded quality factor is found to be 290. View full abstract»

• ### A Novel 3–5 GHz Active Matched Filter for Impulse Radio Ultra-Wideband

Publication Year: 2009, Page(s):458 - 460
Cited by:  Papers (1)
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In this letter, a novel active matched filter for UWB-IR lower band (3.1-4.85 GHz) is presented. The signal to noise ratio is improved at the output using a tapped delay line with a common source amplifier. An artificial transmission line is used for wideband impedance matching. The matched filter achieves a power gain of 9.8 dB at center frequency. Input matching is better than -19 dB and output ... View full abstract»

• ### Microwave Active Inductors

Publication Year: 2009, Page(s):461 - 463
Cited by:  Papers (19)
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In this letter, the experimental proofs of two microwave active inductors with very high quality factor, namely Differential Boot-Strapped Inductor (D-BSI) and Cross-Coupled Differential Boot-Strapped Inductor (CCD-BSI), are presented. These circuits can be effectively implemented in modern RF-CMOS processes for high-Q equivalent integrated inductors at high frequency. The cases of study at 13 GHz... View full abstract»

• ### A 2.4 GHz Current-Reused CMOS Balun-Mixer

Publication Year: 2009, Page(s):464 - 466
Cited by:  Papers (6)
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A 0.13 mum CMOS 2.4 GHz balun-mixer is proposed, where a current-reused noise-canceling topology is adopted as the transconductance stage to reduce dc power consumption. After frequency conversion, noise-cancellation is achieved only when a specified condition is satisfied, but single-to-differential signal conversion is inherently obtained by the mixer operation. The fabricated chip shows a conve... View full abstract»

• ### A 38% Tuning Bandwidth Low Phase Noise Differential Voltage Controlled Oscillator Using a 0.5 $mu$m E/D-PHEMT Process

Publication Year: 2009, Page(s):467 - 469
Cited by:  Papers (7)
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This paper presents a 38% tuning bandwidth low phase noise differential voltage controlled oscillator (VCO) using a 0.5 mum enhancement/depletion-pseudomorphic high-electron mobility transistor (E/D-PHEMT) process. The proposed VCO is based on a differential topology with two common-gate transistors. To achieve a wide tuning range with low phase noise, varactor in the VCO core employs the E-mode P... View full abstract»

• ### Low Noise Wide Tuning Range Quadrature Ring Oscillator for Multi-Standard Transceiver

Publication Year: 2009, Page(s):470 - 472
Cited by:  Papers (22)
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This letter presents a low phase noise quadrature ring oscillator with new start-up circuit. The oscillator architecture is a two-stage differential ring with an additional pair of transition-assistance transistors. The circuit was implemented in 0.18 mum CMOS technology and the measured tuning range of the prototype device is from 1.7 GHz to 5.5 GHz and figure of merit (FOM) is -162 dB. The propo... View full abstract»

• ### Peak Class F and Inverse Class F Drain Efficiencies Using Si LDMOS in a Limited Bandwidth Design

Publication Year: 2009, Page(s):473 - 475
Cited by:  Papers (11)
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This paper compares two popular high power, high efficiency modes of operation, class F and inverse class F, and assesses the peak obtainable drain efficiencies when using Si LDMOS devices in a limited bandwidth design. Optimum class F and inverse class F conditions are presented using active harmonic load-pull measurements, and it was found that a higher drain efficiency was achieved in the class... View full abstract»

• ### A Wideband Analog Predistortion Power Amplifier With Multi-Branch Nonlinear Path for Memory-Effect Compensation

Publication Year: 2009, Page(s):476 - 478
Cited by:  Papers (6)
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A wideband, multi-branch analog predistorter (MBAPD) is reported to compensate for memory effects as well as memoryless nonlinearity of the power amplifier (PA) for repeater systems with wideband modulated signals. For verification, the MBAPD with three-branch nonlinear path is implemented with a 30 W class-AB PA and tested using a two-carrier wideband code division multiple access (WCDMA) signal ... View full abstract»

• ### A 2.4 GHz Fully Integrated Linear CMOS Power Amplifier With Discrete Power Control

Publication Year: 2009, Page(s):479 - 481
Cited by:  Papers (39)  |  Patents (1)
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A fully integrated 2.4 GHz CMOS power amplifier (PA) in a standard 0.18 mum CMOS process is presented. Using a parallel-combining transformer (PCT) and gate bias adaptation, a discrete power control of the PA is achieved for enhancing the efficiency at power back-off. With a 3.3 V power supply, the PA has a peak drain efficiency of 33% at 31 dBm peak output power. By applying discrete power contro... View full abstract»

• ### Wideband LNA Compatible for Differential and Single-Ended Inputs

Publication Year: 2009, Page(s):482 - 484
Cited by:  Papers (13)  |  Patents (3)
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This letter presents a wideband low-noise amplifier (LNA) that supports both differential and single-ended inputs, while providing differential output. The LNA is implemented in 0.13 mum CMOS technology. For sub-1 GHz wideband applications, this LNA achieves 22.5 dB voltage gain, +1 dBm IIP3, and 2.5 dB NF in the differential receiving mode, while achieving 23 dB voltage gain, -0.5 dBm IIP3, and 2... View full abstract»

• ### IEEE Microwave and Wireless Components Letters Reviewers List

Publication Year: 2009, Page(s): C3
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• ### Blank page [back cover]

Publication Year: 2009, 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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## 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