IEEE Microwave and Wireless Components Letters

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

Publication Year: 2009, Page(s): C2
| PDF (43 KB)
• A Fast Algorithm to Calculate the Transfer Impedance of an Arbitrarily Shaped Power Bus

Publication Year: 2009, Page(s):125 - 127
Cited by:  Papers (4)
| | PDF (162 KB) | HTML

This letter presents a fast algorithm for a modal expansion solution that can be used to calculate the transfer impedance of a power bus with an arbitrary shape. Being different from conventional studies that only discuss simple geometry, such as rectangular and triangular shapes, the present study deduces an integral theory to handle arbitrarily shaped power bus by the product of impedance matrix... View full abstract»

• A Novel Carrier Suppression Method for RFID

Publication Year: 2009, Page(s):128 - 130
Cited by:  Papers (9)
| | PDF (392 KB) | HTML

When passive RFID tags are used, RFID readers need to transmit a constant carrier, during uplink communication to provide sufficient operating power to the tag. This high power carrier with its associated noise, limits the receiver sensitivity and, hence, the possible reading range. This letter proposes a new way to cancel the received carrier. The topology, based on a directional coupler and a re... View full abstract»

• One-Directional Perfect Cloak Created With Homogeneous Material

Publication Year: 2009, Page(s):131 - 133
Cited by:  Papers (58)
| | PDF (314 KB) | HTML

A one-directional invisibility cloak is presented in this letter. Perfect invisibility can be achieved for TM waves along certain directions. The parameters are just homogeneously anisotropic and relatively easy for practical realizations. Nonmagnetic cloak is also studied to further reducing the complexity of the cloak parameters. Thin layered systems with alternating isotropic materials are then... View full abstract»

• Measurements and Modeling of Planar Metal Film Patterns Deposited on Dielectric Substrates

Publication Year: 2009, Page(s):134 - 136
Cited by:  Papers (7)
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Split dielectric resonator operating in a quasi TE011 mode was used for the measurements of resonance frequency shifts and Q-factor changes due to the presence of closely packed metal film circles deposited on low loss dielectric substrates. Several film patterns were investigated having various diameters of circles and made of films with different surface resistivity values. Fin... View full abstract»

• Two-Dimensional Subwavelength Focusing Using a Slotted Meta-Screen

Publication Year: 2009, Page(s):137 - 139
Cited by:  Papers (16)  |  Patents (1)
| | PDF (312 KB) | HTML

A transmission screen with subwavelength slots is described which can focus electromagnetic radiation to a 2-D subwavelength spot. Unlike negative-refractive-index focusing implementations, this ldquometa-screenrdquo does not suffer from image degradation when losses are introduced and is easily scalable from microwave to Terahertz frequencies and beyond. The slotted geometry is designed using a t... View full abstract»

• Piezoelectric Coefficients of Thin Film Aluminum Nitride Characterizations Using Capacitance Measurements

Publication Year: 2009, Page(s):140 - 142
Cited by:  Papers (9)
| | PDF (239 KB) | HTML

Piezoelectric materials have become very useful in MEMS devices because of their electrical-mechanical reciprocity. Aluminum nitride has attracted considerable attention in recent years owing to its unique properties. Here we report for the determination of aluminum nitride (AlN) piezoelectric thin film charge constants. When voltage is applied, the AlN film geometrical dimensions will change. The... View full abstract»

• Slot-Coupled Multisection Quadrature Hybrid for UWB Applications

Publication Year: 2009, Page(s):143 - 145
Cited by:  Papers (22)  |  Patents (1)
| | PDF (377 KB) | HTML

We present a three-section quadrature hybrid based on slot-coupled directional couplers, which operates over a bandwidth from 3.1 to 10.6 GHz. A prototype has been fabricated which exhibits a return loss better than 20 dB, isolation around 20 dB, an amplitude imbalance between output ports of less than plusmn0.75 dB and a phase imbalance between +1deg and -3deg across the 3.1... View full abstract»

• An Ultra-Wideband Bandpass Filter With an Embedded Open-Circuited Stub Structure to Improve In-Band Performance

Publication Year: 2009, Page(s):146 - 148
Cited by:  Papers (32)  |  Patents (2)
| | PDF (478 KB) | HTML

In this letter, we present a compact ultra-wideband bandpass filter (BPF) with a notch band in the BPF performance by using an embedded open-circuited stub structure. The filter mainly consists of conventional stepped impedance resonator (SIR) as the multiple-mode resonator and two enhanced coupled input/output lines. The bandwidth can be analyzed by using the image-parameter method to obtain the ... View full abstract»

• Compact Ultra-Wideband Conductor-Backed Coplanar Waveguide Bandpass Filter With a Dual Band-Notched Response

Publication Year: 2009, Page(s):149 - 151
Cited by:  Papers (20)
| | PDF (503 KB) | HTML

This work presents a novel ultra-wideband (UWB) bandpass filter (BPF) based on a conductor-backed coplanar waveguide structure with tunable transmission zeros. The symmetrical UWB BPF, which consists of the broadside-coupled transitions and the stub resonators in double-layer configuration, achieves a UWB bandwidth with transmission zeros. For characterizing this structure, the equivalent-circuit ... View full abstract»

• Quadruple-Mode UWB Bandpass Filter With Improved Out-of-Band Rejection

Publication Year: 2009, Page(s):152 - 154
Cited by:  Papers (98)
| | PDF (547 KB) | HTML

A quadruple-mode ultra-wideband (UWB) bandpass filter with sharp out-of-band rejection is presented in this work. As a starting part of designing a quadruple-mode filter, a mode graph of the initial triple-mode resonator is studied to choose its proper dimensions. Based on these pre-determined dimensions of this triple-mode resonator, two short-circuited stubs are introduced in this resonator to g... View full abstract»

• Dual-Wideband Bandpass Filter Using Short-Circuited Stepped-Impedance Resonators

Publication Year: 2009, Page(s):155 - 157
Cited by:  Papers (41)
| | PDF (252 KB) | HTML

A compact dual-wideband bandpass filter featuring two controllable passbands is presented and experimentally validated. The proposed filter uses shorted stepped-impedance resonators to achieve dual-wideband bandpass capability and to minimum size. Design curves are given for the filter design. It is found that the frequency ratio of the second to first band has a wide achievable range. An experime... View full abstract»

• A Class of Microwave Transversal Signal-Interference Dual-Passband Planar Filters

Publication Year: 2009, Page(s):158 - 160
Cited by:  Papers (39)
| | PDF (181 KB) | HTML

A new type of microwave dual-passband planar filter exploiting signal-interference techniques is presented. The described filter approach consists of transversal filtering sections shaped by two transmission lines connected in parallel. This transversal section, operating under feedforward signal-combination principles, allows dual-band bandpass filtering responses with several transmission zeros ... View full abstract»

• Evanescent-Mode Bandpass Filters Using Folded and Ridge Substrate Integrated Waveguides (SIWs)

Publication Year: 2009, Page(s):161 - 163
Cited by:  Papers (18)
| | PDF (484 KB) | HTML

A novel evanescent-mode bandpass filter (BPF) is presented using folded and ridge substrate integrated waveguides (FSIWs & RSIWs). Both measured and simulated S-parameters are presented to show the characteristics, with good agreements achieved between them. It is experimentally validated that such a BPF has better performance in spurious suppression and much smaller size than those of convent... View full abstract»

• A 2–40 GHz Active Balun Using 0.13 $\mu{\rm m}$ CMOS Process

Publication Year: 2009, Page(s):164 - 166
Cited by:  Papers (24)
| | PDF (164 KB) | HTML

A 2 to 40 GHz broadband active balun using 0.13 mum CMOS technology is presented in this letter. Using two-stage differential amplified pairs, the active balun can achieve a wideband performance with the gain compensation technique. This active balun exhibits a measured small signal gain of 0 plusmn1, with the amplitude imbalances below 0.5 dB and the phase differences of 180 plusmn10deg from 2 to... View full abstract»

• Design of Submillimeter Schottky Mixers Under Flat-Band Conditions Using an Improved Drift-Diffusion Model

Publication Year: 2009, Page(s):167 - 169
Cited by:  Papers (5)
| | PDF (189 KB) | HTML

Minimum conversion loss in millimeter and submillimeter-wave Schottky mixers is achieved when the diodes are slightly pushed into the flat-band regime. The discrepancies found between experimental results and physics-based harmonic balance simulations for a 330 GHz antiparallel diode pair subharmonic Schottky mixer showed that traditional drift-diffusion models with conventional boundary condition... View full abstract»

• A 98/196 GHz Low Phase Noise Voltage Controlled Oscillator With a Mode Selector Using a 90 nm CMOS Process

Publication Year: 2009, Page(s):170 - 172
Cited by:  Papers (13)
| | PDF (440 KB) | HTML

A 98/196 GHz low phase noise voltage controlled oscillator (VCO) with a fundamental/push-push mode selector using a 90 nm CMOS process is presented in this letter. An innovative concept of the VCO with the mode selector is proposed to switch the fundamental or second harmonic to the RF output. The VCO demonstrates a fundamental frequency of up to 98 GHz with an output power of greater than -8 dBm.... View full abstract»

• Millimeter Wave Varistor Mode Schottky Diode Frequency Doubler in CMOS

Publication Year: 2009, Page(s):173 - 175
Cited by:  Papers (13)
| | PDF (946 KB) | HTML

The first mm-wave varistor mode Schottky diode frequency doubler fabricated in CMOS is demonstrated. The doubler exhibits 14 dB conversion loss, -11 dBm output power at 132 GHz and 6 GHz 3-dB output bandwidth from 128 to 134 GHz. The input matching is better than -10 dB and the rejection of fundamental signal at output is greater than 14 dB from 62 to 70 GHz. View full abstract»

• A Fully Integrated 5 GHz Low-Voltage LNA Using Forward Body Bias Technology

Publication Year: 2009, Page(s):176 - 178
Cited by:  Papers (39)
| | PDF (233 KB) | HTML

A fully integrated 5 GHz low-voltage and low-power low noise amplifier (LNA) using forward body bias technology, implemented through a 0.18 mum RF CMOS technology, is demonstrated. By employing the current-reused and forward body bias technique, the proposed LNA can operate at a reduced supply voltage and power consumption. The proposed LNA delivers a power gain (S21) of 10.23 dB with a noise figu... View full abstract»

• Comparison of the Behavioral Modelings for RF Power Amplifier With Memory Effects

Publication Year: 2009, Page(s):179 - 181
Cited by:  Papers (11)
| | PDF (286 KB) | HTML

In this letter, three different kinds behavioral models are introduced to analyze the performance of power amplifiers (PAs) with strong memory. Among these models, the non-uniform delay memory polynomial model is compared with the traditional memory polynomial model for analyzing effect of sparse delays, and the enhanced memory polynomial model for evaluating nonlinear memory effect. Finally, a Wi... View full abstract»

• Study of Millimeter Wave Phase Shift in 40 GHz Hybrid Mode Locked Lasers

Publication Year: 2009, Page(s):182 - 184
Cited by:  Papers (5)
| | PDF (444 KB) | HTML

An investigation into using hybrid mode-locked lasers to implement millimeter wave phase shift is presented. The phase shift is measured directly using a vector network analyzer enabling straightforward characterization of such systems. Both magnitude and phase of the modulation response are measured and a ldquoplateaurdquo is observed in the magnitude response which corresponds to the locking ran... View full abstract»

• Editorial board

Publication Year: 2009, Page(s): C3
| PDF (24 KB)
• Blank page [back cover]

Publication Year: 2009, Page(s): C4
| PDF (5 KB)

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.

Full Aims & Scope

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