# IEEE Microwave and Wireless Components Letters

## Issue 4 • April 2018

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## Filter Results

Displaying Results 1 - 25 of 33

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
| PDF (76 KB)
• ### Implicit Space Mapping for Variable-Fidelity EM-Driven Design of Compact Circuits

Publication Year: 2018, Page(s):275 - 277
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Space mapping (SM) belongs to the most successful surrogate-based optimization (SBO) methods in microwave engineering. Among available SM variations, implicit SM (ISM) is particularly attractive due to its simplicity and separation of extractable surrogate model parameters and design variables of the circuit/system at hand. Unlike other SM approaches, ISM exploits a set of preassigned parameters t... View full abstract»

• ### Automatic Reduction-Order Selection for Finite-Element Macromodels

Publication Year: 2018, Page(s):278 - 280
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An automatic reduction-order selection algorithm for macromodels in finite-element analysis is presented. The algorithm is based on a goal-oriented a posteriori error estimator that operates on low-order reduced blocks of matrices, and hence, it can be evaluated extremely quickly. View full abstract»

• ### Inductance Modeling of Interconnections in 3-D Stacked-Chip Packaging

Publication Year: 2018, Page(s):281 - 283
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This letter explores the inductance of interconnections including through-silicon vias (TSVs) and redistribution layers (RDLs) in 3-D stacked-chip packaging. It is described that the common summing method of partial inductances will result in some deviations from the full inductance. Then, the inductances of TSVs and RDLs are, respectively, calculated and are verified by a commercial electromagnet... View full abstract»

• ### A Compact Two-via Hammer Spanner-Type Polarization-Dependent Electromagnetic Bandgap Structure

Publication Year: 2018, Page(s):284 - 286
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In this letter, a compact two-via hammer spanner-type polarization-dependent electromagnetic bandgap (TVHS-PDEBG) structure is proposed. Asymmetrical structure of the TVHS-PDEBG results in different bandgap properties in the $x$ - and $y$ -directions. Comp... View full abstract»

• ### Highly Sensitive Microwaves Sensors for Fluid Concentration Measurements

Publication Year: 2018, Page(s):287 - 289
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Although electromagnetic-stored energy of planar electrically-small resonators is mostly concentrated in an electrically small volume, most of the energy, however, is concentrated in the host substrate, thus limiting the sensitivity to detect changes in the material under test which is different from the host substrate. In this letter, a sensor design for enhancing the electromagnetic stored energ... View full abstract»

• ### A Negative Group Delay Microwave Circuit Based on Signal Interference Techniques

Publication Year: 2018, Page(s):290 - 292
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A novel self-matched negative group delay (NGD) microwave circuit based on the signal interference technique is proposed to eliminate the performance degradation due to the temperature-dependent resistance variation. The proposed circuit consists of unequal power dividing/combining structures and coupled-line phase shifter, which can be directly synthesized with prescribed NGD time and insertion l... View full abstract»

• ### Design of a Compact Planar Crossover With Four Intersecting Channels

Publication Year: 2018, Page(s):293 - 295
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A compact planar crossover with four intersecting channels is proposed. By using two cascoded rings, the crossover with eight ports is constructed. The derived electrical lengths and selected impedance ratio between the interconnected lines and the outer ring are also used to achieve the desired central frequency. The measured and theoretically calculated results match well so that the feasibility... View full abstract»

• ### On the Split-Block Realization of Millimeter-Wave Ridge Waveguide Components

Publication Year: 2018, Page(s):296 - 298
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A method to reduce RF leakage in split-block fabricated metallic ridged waveguide is presented. By placing a pin wall into the split-block seam, RF leakage and detrimental performance spikes are significantly reduced. Three different split-block double-ridge waveguide components of varying design complexity operating over 18–45-GHz bandwidth are fabricated and measured. It is shown that the... View full abstract»

• ### Impedance Transforming Tandem Couplers With Increased Bandwidth and Transformation Ratio

Publication Year: 2018, Page(s):299 - 301
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A novel concept of impedance transforming directional couplers for applications in balanced networks has been proposed. The proposed networks consist of a tandem connection of two asymmetric directional couplers having different coupling coefficients. Theoretical analysis of the proposed networks has been shown and the maximum achievable transformation ratio versus the required reflection coeffici... View full abstract»

• ### Symmetrical Quasi-Reflectionless BSFs

Publication Year: 2018, Page(s):302 - 304
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A type of symmetrical bandstop filters (BSFs) with quasi-reflectionless behavior is reported. The engineered BSF configuration is made up of a bandstop section with resistively terminated bandpass sections that are connected at its input/output accesses. These bandpass sections, which exhibit a nearly complementary transfer function with regard to the one of the bandstop section, dissipate the non... View full abstract»

• ### Extended-Doublet Half-Mode Substrate Integrated Waveguide Bandpass Filter With Wide Stopband

Publication Year: 2018, Page(s):305 - 307
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A half-mode substrate integrated waveguide (HSIW) filter incorporated with co-planar waveguide (CPW) and co-planar strip (CPS) is proposed. Quarter-wavelength CPW and half-wavelength CPS resonators etched on the top metal layer are used to realized extended-doublet topology. Meanwhile, wide stopband characteristic is obtained, which is due to different higher order resonant frequencies of HSIW, CP... View full abstract»

• ### A Novel Dual-Band Controllable Bandpass Filter Based on Fan-Shaped Substrate Integrated Waveguide

Publication Year: 2018, Page(s):308 - 310
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A compact dual-band bandpass filter with controllable center frequencies based on the 90° fan-shaped substrate integrated waveguide resonator (FSSIWR) is first proposed in this letter. Dual-band response is achieved by the fundamental mode (TM101 mode) and high mode (TM201 mode) of the FSSIWR, respectively. In this design, two pairs of the posts are loaded at the 45&#x... View full abstract»

• ### Miniaturized Dual-Band SIW Filters Using E-Shaped Slotlines With Controllable Center Frequencies

Publication Year: 2018, Page(s):311 - 313
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In this letter, a simple method for miniaturized dual-band bandpass filters (BPFs) through E-shaped slotlines has been proposed. The slotlines are etched on the edge sides of the substrate-integrated waveguide (SIW) cavities coupled with magnetic fields of the resonant modes, which makes the proposed cavity operate below its fundamental resonant frequency. Moreover, out-of-band rejection has been ... View full abstract»

• ### Low-Loss Directional Filters Based on Differential Band-Reject Filters With Improved Isolation Using Phase Inverter

Publication Year: 2018, Page(s):314 - 316
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In this letter, a novel approach to the design of directional filters (DFs) based on the differential bandstop filter and delay lines is proposed. It is shown that utilization of a phase inverter (PI) and reference line as a mode-converting phase shifter allows for obtaining theoretically ideal bandpass-to-bandstop channels isolation over an infinite bandwidth. The presented theoretical analysis i... View full abstract»

• ### Compact SIW Diplexer With Flexibly Allocated Bandwidths Using Common Dual-Mode Cavities

Publication Year: 2018, Page(s):317 - 319
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A realization method for compact diplexers using mixed dual-mode and single-mode resonators is presented based on an advanced coupling scheme. An example with one common dual-mode (TE101 and TE201) cavity and each channel of two single-mode (TE101) cavities is demonstrated using substrate-integrated waveguide technology. The footprint of the diplexer is reduced com... View full abstract»

• ### Wideband Diplexer Design and Optimization Based on Back-to-Back Structured Common Port

Publication Year: 2018, Page(s):320 - 322
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A “back-to-back” structured common port is proposed with high isolation obtained between the two channels. This port has the advantage of being able to easily achieve a low external quality factor ( $Q_{e}$ ). By introducing this type of port, a “back-to-back” structured diplexer with wide bandwidth ... View full abstract»

• ### Detection of Minimum Geometrical Variation by Free-Space-Based Chipless Approach and its Application to Authentication

Publication Year: 2018, Page(s):323 - 325
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A free-space-based chipless approach using a second-order bandpass filter model is presented in this letter to detect minimum geometrical variations along the dimensions of a C-folded scatterer. With the help of this model, further randomness inherent in fabrication process can also be analyzed and forecast. Quad C-folded scatterers are used to realize chipless tags and three groups of tags exhibi... View full abstract»

• ### Technology-Independent Analysis of the Double Current-Gain Peak in Millimeter-Wave FETs

Publication Year: 2018, Page(s):326 - 328
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This letter is aimed at discovering and analyzing anomalous phenomena affecting millimeter-wave FETs, focusing on a GaN HEMT as a case study. For the first time, we show that the real parts of the impedance parameters can increase and then decrease with frequency, due to the resonance of the extrinsic reactive elements. This resonance may be detected as a peak in the magnitude of the short-circuit... View full abstract»

• ### A Broadband Microwave Noise Generator Using Zener Diodes and a New Technique for Generating White Noise

Publication Year: 2018, Page(s):329 - 331
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A microwave noise generator using Zener diodes as the source of noise has been designed and built. It generates almost constant noise power about 20 dB above the noise floor up to 3.2 GHz. The noise generator circuit employs two independent current sources and two identical Zener diodes to generate independent noise powers optimized for lower frequencies (<1.4 GHz) and higher frequencies (&... View full abstract»

• ### An Interband Time-Delay Compensation Algorithm for Concurrent Dual-Band Power Amplifier Characterization

Publication Year: 2018, Page(s):332 - 334
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In this letter, an interband time-delay compensation algorithm that is based on correlation enhancement technique has been proposed to process the signals used for concurrent dual-band power amplifier (PA) characterization, where the characterization is a crucial step of behavioral modeling and digital predistortion (DPD) of the PA, and the interband time delay represents the difference of delay t... View full abstract»

• ### Compact and Broadband RF Rectifier With 1.5 Octave Bandwidth Based on a Simple Pair of L-Section Matching Network

Publication Year: 2018, Page(s):335 - 337
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This letter proposes a novel wideband rectifier circuit for RF energy harvesting. The proposed circuit can collect signals efficiently over broad bandwidth spanning from 0.87 to 2.7 GHz which includes UHF ISM 900 MHz, GSM 900 and 1800 MHz, wireless communication, PCS, and ISM 2.4 GHz. In order to obtain sufficiently large rectifier bandwidth, a matching circuit based on high-pass type L-section fo... View full abstract»

• ### A Miniature 200-GHz Subharmonic Mixer With a Folded 180° Hybrid Using Equal-Length Edge- and Broadside-Coupled Lines

Publication Year: 2018, Page(s):338 - 340
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A miniature 180° hybrid is proposed to demonstrate a 200-GHz subharmonic mixer (SHM) using a 0.18- $mu text{m}$ SiGe BiCMOS process. The reduced-size 180° hybrid is achieved by folding the shared coupled lines between the in-phase power divider and the out-of-phase Marchand balun. The shared coupled lines demand ... View full abstract»

• ### 300-GHz Balanced Varactor Doubler in Silicon CMOS for Ultrahigh-Speed Wireless Communications

Publication Year: 2018, Page(s):341 - 343
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This letter presents a 300-GHz varactor doubler suitable for ultrahigh-speed wireless communications. The doubler employs balance configuration to enhance the second harmonic efficiently. The proposed varactor doubler realized in TSMC 40-nm CMOS can be integrated with other CMOS components to generate millimeter-wave signals at 300-GHz frequency band. At the pumping frequency of 150 GHz and input ... 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