# IEEE Microwave and Wireless Components Letters

## Issue 2 • Feb. 2018

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## Filter Results

Displaying Results 1 - 25 of 35

Publication Year: 2018, Page(s):C1 - C4
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• ### IEEE Microwave and Wireless Components Letters publication information

Publication Year: 2018, Page(s): C2
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• ### Efficient Modeling and Analysis of the Multiple Air Hole Effect in Substrate-Integrated Waveguide

Publication Year: 2018, Page(s):93 - 95
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A wide spectrum of potential applications using substrate-integrated waveguide (SIW) technologies in conjunction with air hole regions is introduced, and an efficient analysis method to cope with the multiple air hole effect in the SIW is proposed where we present the generalized wave equation satisfying the boundary and phase matching conditions to solve the multiple air interface problem, which ... View full abstract»

• ### Generalized Memory Polynomial Model Dimension Selection Using Particle Swarm Optimization

Publication Year: 2018, Page(s):96 - 98
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This letter presents a new method which uses particle swarm optimization and the Akaike information criterion for determining the dimensions of nonlinear amplifier behavioral models, applied to the generalized memory polynomial model. Determining the size of this model has always been a challenge as it depends on eight parameters, and the proposed method provides a fast and efficient solution whic... View full abstract»

• ### High-Performance MMIC Inductors for GaN-on-Low-Resistivity Silicon for Microwave Applications

Publication Year: 2018, Page(s):99 - 101
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Novel MMIC spiral inductors on GaN-on-low-resistivity silicon (LR-Si) substrates ( $sigma < 40~Omega cdot text {cm}$ ) are demonstrated with enhanced self-resonance frequency ( $f_{mathrm{ SRF}}$ ) and $Q$ View full abstract»

• ### Novel High-Performance Bondwire Chip-to-Chip Interconnections for Applications Up to 220 GHz

Publication Year: 2018, Page(s):102 - 104
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This letter presents a novel chip-to-chip interconnect technology for millimeter-wave and ultra-wideband applications. The technique relies on magnetic coupling between half-loop bondwires to transfer power over pads of semiconductor dies provided with crack stops. Conventional aluminum wires with a diameter of $17~mu text{m}$ View full abstract»

• ### Dual of Defected Ground Structure for Coplanar Stripline

Publication Year: 2018, Page(s):105 - 107
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Defected ground structures (DGS) have been used with microstrip and coplanar waveguide (CPW), but until now no comparable structure has been demonstrated for coplanar stripline (CPS), probably because there is no “ground plane.” This letter introduces a dual of DGS for CPS with dual properties, or it acts as a shunt, series RLC circuit that creates an equivalent shunt short circuit a... View full abstract»

• ### A Uniplanar Left-Handed Metamaterial for Terrestrial Microwave Links

Publication Year: 2018, Page(s):108 - 110
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This letter reveals a $30 times 18$ mm2 metamaterial unit cell using coupled rectangular split-ring resonator (SRR), fabricated on only one side of the epoxy resin fiber substrate material. The proposed design consists of two separate SRRs outside and three split array rectangles with a small rectangle inside. It g... View full abstract»

• ### 12-Way 100 kW Reentrant Cavity-Based Power Combiner With Doorknob Couplers

Publication Year: 2018, Page(s):111 - 113
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We present radio frequency (RF) and thermal characterization of a compact 12-way power combiner designed for operation at 352 MHz at a power level of 100 kW with 5% duty factor. The combiner is based on a reentrant cavity with 12 input doorknob couplers and one output coupler that is integrated with the post of the cavity and forms doorknob type geometry. We introduce convenient design form... View full abstract»

• ### Wilkinson Power Divider With Fixed Width Substrate-Integrated Waveguide Line and a Distributed Isolation Resistance

Publication Year: 2018, Page(s):114 - 116
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This letter proposes a new modified architecture of the Wilkinson power divider (WPD) based on fixed-width substrate-integrated waveguides (SIW) lines with optimal network isolation resistors. To overcome the problem related impedance variation of the SIW line without altering other characteristics, a reference impedance is used in all parts of WPD. The length of branches is designed considering t... View full abstract»

• ### Four-Way Chained Quasi-Planar Slotted-HMSIW Power Divider

Publication Year: 2018, Page(s):117 - 119
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A four-way chained quasi-planar slotted power divider, using half-mode substrate-integrated waveguide technology, is presented in this letter. Based on the equivalent-circuit model, slotted capacitive coupling model has been achieved. In order to verify the validity of the design method, a four-way power divider operating at X-band is designed, fabricated and measured. The simulation and measured ... View full abstract»

• ### A High-Performance Dual-Mode Filtering Power Divider With Simple Layout

Publication Year: 2018, Page(s):120 - 122
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This letter presents a simple microstrip dual-mode filtering power divider (FPD) with sharp frequency selectivity and good in-band isolation. A new topology is proposed to integrate only a single resonator and a resistor to realize the dual functions of the power division and filtering. In order to further improve its frequency selectivity and obtain wide upper stopband, three open-ended stubs are... View full abstract»

• ### Characteristic Impedance Control for Branch-Line Coupler Design

Publication Year: 2018, Page(s):123 - 125
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This letter presents a new approach to control impedance for branch-line coupler (BLC) design. With the proposed method, the highest impedance of the two-section BLC can be set to a realistic value (below $100~Omega$ ), so that it can be implemented with ordinary planar technology. The measured results are compared with the si... View full abstract»

• ### A Multiband Directional Coupler Using SOI CMOS for RF Front-End Applications

Publication Year: 2018, Page(s):126 - 128
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This letter introduces a novel multiband directional coupler for RF front-end applications. Conventional narrowband directional couplers are widely used for mobile applications because of their compact size. However, excessive power loss due to strong coupling in the higher frequency range severely limits their bandwidth. To resolve this issue, we propose a dual directional coupler employing a cou... View full abstract»

• ### Differential Bandpass Filters Based on Dumbbell-Shaped Defected Ground Resonators

Publication Year: 2018, Page(s):129 - 131
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This letter presents a dumbbell-shaped defected ground resonator and its application in the design of differential filters. The operation principle of the dumbbell-shaped resonator (DSR) coupled to differential microstrip lines is studied through a circuit model analysis. The proposed circuit model is validated through the comparison with the electromagnetic simulation results. It is shown that th... View full abstract»

• ### Balanced Filter With Wideband Common-Mode Suppression in Groove Gap Waveguide Technology

Publication Year: 2018, Page(s):132 - 134
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This letter is focused on the design and realization of balanced bandpass filters (BPFs) in gap waveguide technology. The procedure of filter design and resonance-mode selection to achieve the desired differential bandpass behavior with intrinsic deep and wideband common-mode suppression is explained. A third-order differential BPF is designed and fabricated for demonstration. Agreement between th... View full abstract»

• ### New Negative Coupling Structure for ${K}$ -Band Substrate-Integrated Waveguide Resonator Filter With a Pair of Transmission Zeros

Publication Year: 2018, Page(s):135 - 137
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In this letter, we present a new negative coupling structure applicable to a substrate-integrated waveguide (SIW) resonator filter structure. Unlike conventional negative coupling structure, the proposed coupling structure can achieve a negative coupling value without employing an additional substrate or slots on ground planes. To demonstrate the new negative coupling structure, we designed, fabri... View full abstract»

• ### An Improved RF MOSFET Model Accounting Substrate Coupling Among Terminals

Publication Year: 2018, Page(s):138 - 140
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An RF CMOS model incorporating an improved substrate coupling network is developed. The proposed model focuses on characterizing the nonlinear phase of S12 when a transistor is under zero-bias condition. In addition, a corresponding parameter extraction technique of the model is proposed. To validate this model, a set of transistors fabricated in a commercial 90-nm CMOS process is inves... View full abstract»

• ### Three-State Microwave Tunable Resonator Integrating Several Active Elements on Silicon Technology in a Global Design

Publication Year: 2018, Page(s):141 - 143
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This letter addresses a discrete tunable resonator with three different states controlled by a single dc source. The passive components are designed together with the active elements, and both are integrated into a silicon substrate. This method of codesign offers great flexibility in doped area sizing and positioning, allowing for easy management of novel three-state resonators based on two diffe... View full abstract»

• ### Negative Resistance-Based Electronic Impedance Tuner

Publication Year: 2018, Page(s):144 - 146
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An electronic impedance tuner using the negative resistance of tunneling diodes is proposed in this paper. Aside from the fact that it is an interesting solution to synthesize impedance with reflection coefficient larger than one, this scheme is proven to be simpler and consume less power than the state-of-the-art techniques. The overall circuit topology consists of two parts, namely, impedance tu... View full abstract»

• ### A 2.6–3.4 GHz Fractional- $N$ Sub-Sampling Phase-Locked Loop Using a Calibration-Free Phase-Switching-Sub-Sampling Technique

Publication Year: 2018, Page(s):147 - 149
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Sub-sampling phase-locked loop (SSPLL) achieves lower in-band phase noise compared to a conventional charge-pump phase-locked loop with frequency dividers. Recently, several works have been reported to enable fractional-N operation of SSPLL to broaden its applications. However, they require careful calibrations with extra silicon area and adjusting time (~20 ms measured) to achieve low phas... View full abstract»

• ### A $K$ -Band CMOS Amplifier With Temperature Compensation for Gain Variation Reduction

Publication Year: 2018, Page(s):150 - 152
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This letter proposes a new temperature compensation method that automatically generates the adaptive bias voltage for a microwave amplifier to obtain nearly constant gain over a wide temperature range. The method uses a two-segment polyline to linearly fit the ideal bias curve, and each segment is realized through digitally controlled superposition of proportional-to-absolute temperature and const... View full abstract»

• ### A Low Phase Noise Feedback Oscillator Based on SIW Bandpass Response Power Divider

Publication Year: 2018, Page(s):153 - 155
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A low phase noise X-band oscillator based on the bandpass response power divider in single-layer substrate integrated waveguide (SIW) technology is presented in this letter. The power divider is embedded in the SIW filter; therefore, lower insertion loss and more compact area size can be realized than those using the independent design of both components. To achieve better phase noise performance,... View full abstract»

• ### Novel Design Space of Load Modulated Continuous Class-B/J Power Amplifier

Publication Year: 2018, Page(s):156 - 158
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A novel design space of load modulated (LM) continuous Class-B/J power amplifiers (PAs) is proposed, and a detailed mathematical analysis is presented. The combination of LM technique and continuous mode is introduced to enhance the wideband performance of LM PAs. An inversely proportional relationship between $Z_{L}$ and View full abstract»

• ### Design of Broadband High-Efficiency Power Amplifiers Based on the Hybrid Continuous Modes With Phase Shift Parameter

Publication Year: 2018, Page(s):159 - 161
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The hybrid continuous modes are constituted by a continuum of power amplifier (PA) modes between class-J and continuous class-F. In this letter, a phase shift parameter is introduced in the voltage waveform formula of the hybrid continuous modes to generate complex fundamental and harmonic load impedances, leading to a further extension on the operation bandwidth. Based on the proposed theory, a g... 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