<![CDATA[ IEEE Microwave and Wireless Components Letters - new TOC ]]>
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TOC Alert for Publication# 7260 2019April 18<![CDATA[Table of contents]]>294C1C4207<![CDATA[IEEE Microwave and Wireless Components Letters publication information]]>294C2C2169<![CDATA[Stability-Improved Spectral-Element Time-Domain Method Based on Newmark-<inline-formula> <tex-math notation="LaTeX">$beta$ </tex-math></inline-formula>]]>$beta $ scheme is proposed. The algorithm preserves the explicit solution property, and the time step is doubled compared with that of the traditional SETD method. In addition, the novel algorithm has a significant effect on the suppression of late-time instability. Some numerical results demonstrate the ability and accuracy of this algorithm.]]>294243245775<![CDATA[Design of Ultraflat Phase Shifters Using Multiple Quarter-Wavelength Short-Ended Stubs]]>$lambda /4$ ) short-ended stubs. The proposed topology consists of a uniform line with multi-$lambda /4$ short-ended stubs and a reference line. Inspired by the high-pass filter design, the phase difference can be analytically determined by the impedance and the number of the short-ended stubs. In order to obtain a wider phase bandwidth with ultraflat phase difference around the center operating frequency, a generalized design equation is newly derived over a wide achievable range from 15° to 360°. As a validation, the third-order proposed phase shifter with 135° phase difference is designed and implemented at 3 GHz. The measured results show a good agreement with those obtained from simulation. The measured 10-dB impedance bandwidth achieves 102%, and the bandwidth of 135° ±5° phase difference is about 78%.]]>294246248784<![CDATA[A Novel Structure to Suppress Transverse Modes in Radio Frequency TC-SAW Resonators and Filters]]>294249251737<![CDATA[Wideband Filtering Phase Shifter Using Transversal Signal-Interference Techniques]]>294252254919<![CDATA[Varactor Tuned Dual-Band Bandpass Filter With Independently Tunable Band Positions]]>2942552571024<![CDATA[Controlled Out-of-Band Rejection of Filters Based on SIW With Alternating Dielectric Line Sections]]>$2f_{o}$ . Moreover, the selection of the filter order (i.e., the number of sections with and without dielectric) can affect the depth of the rejection band. A study of the width and the depth of the rejection band is performed with different permittivities and orders for two different filters. Then, for validation purposes, the prototypes of both filters have been manufactured and measured.]]>2942582601030<![CDATA[Multiband Acoustic-Wave-Lumped-Element Resonator-Based Bandpass-to-Bandstop Filters]]>2942612631466<![CDATA[Compact Tunable Balanced Bandpass Filter With Constant Bandwidth Based on Magnetically Coupled Resonators]]>$K_{12}$ and external quality factor $Q_{e}$ can be obtained by the mixed coupling between the two resonators and SIPCF structure, respectively. Two differential-mode (DM) transmission zeros (TZs) near the lower and upper passband edges are created by the mixed coupling and source–load coupling, respectively. Furthermore, intrinsic high CM suppression in the DM tunable operating passband can be maintained because of the magnetically coupled resonator structure. Finally, a compact tunable balanced BPF prototype with constant fractional bandwidth of 6.5% is implemented and fabricated. The measured results agree well with the simulated ones.]]>2942642661047<![CDATA[Integrated Waveguide Filter Amplifier Using the Coupling Matrix Technique]]>$N,+,4$ active coupling matrix is proposed for the first time to describe the coupling topology. High-$Q$ waveguide resonators are featured in the design, achieving simultaneous filtering and matching at both the input and output ports. Easy integration of the transistor with waveguide resonators is demonstrated through filter synthesis, where a hybrid waveguide/ microstrip structure is implemented for the structural and impedance transition. In this letter, an X-band device is constructed as a demonstrator, but the technique is also applicable to higher frequencies where waveguide is widely utilized for its low loss.]]>2942672691017<![CDATA[A 3-dB Coupler in Slow Wave Substrate Integrated Waveguide Technology]]>2942702721189<![CDATA[A Novel 3-dB Waveguide Hybrid Coupler for Terahertz Operation]]>294273275901<![CDATA[A Compact <italic>V</italic>-Band Upconversion Mixer With −1.4-dBm OP1dB in SiGe HBT Technology]]>$0.13-,mu text{m}$ SiGe BiCMOS technology. The detailed design procedure for the on-chip transformer baluns is provided, which enables the compact implementation. The mixer occupies an area of $365,,mu text{m},,times 400,,mu text{m}$ with pads and $175,,mu text{m},,times 300,,mu text{m}$ without pads, consuming 52 mW from a 2.5-V power supply. The mixer achieves an OP1dB of −1.4 dBm at 60-GHz radio frequency, intermediate frequency (IF) bandwidth of 0.5–8.5 GHz on both sidebands, a maximum conversion gain of 13.4 dB, and a 3-dB bandwidth of 50 to above 67 GHz. The performance of the proposed mixer outperforms other state-of-the-art V-band mixers in terms of chip area, IF bandwidth, and linearity.]]>2942762781068<![CDATA[12-mW 97-GHz Low-Power Downconversion Mixer With 0.7-V Supply Voltage]]>2942792811050<![CDATA[A Compact 140-GHz, 150-mW High-Gain Power Amplifier MMIC in 250-nm InP HBT]]>$S_{21}$ gain and over 125-mW output power across 115–150-GHz operation. The peak 153-mW output power was measured at 140 GHz using only 2.7-mW RF input power—the associated large-signal gain is 17.5 dB with 9.8% power added efficiency (PAE). The 140-GHz OP_{1 dB} 1-dB gain compression power is 106 mW with 7.0% PAE. The dc power dissipation is 1.54 W and its size is only 0.75 mm^{2}. The 3-dB $S_{21}$ gain roll-off is between 112 and 147 GHz. The 115–150-GHz output power variation at 0-dBm input drive is only ±0.5 dB. The peak PAE varies between 8.2% and 10.5%. This D-band result improves upon by $2.3times $ at 140 GHz the state-of-the-art peak RF power previously demonstrated by SSPA MMICs.]]>2942822841481<![CDATA[On the Thermal Memory Effect Reduction of Power Amplifiers Using Pulse Modulation]]>2942852871643<![CDATA[High-Efficient Broadband CPW RF Rectifier for Wireless Energy Harvesting]]>$22.5times 31,,text {mm}^{2}$ . In order to accurately characterize the rectifier performance, the electromagnetic and harmonic balance simulations are conducted using the Agilent, ADS software. The comparison shows good agreement between the simulation and measurement results. For instance, the peak measured efficiency is 74.8% at 10-dBm RF input power and the corresponding simulated value is 75% with a terminal load of 1 $text{k}Omega $ . The efficient frequency range is extending from 0.1 to 2.5 GHz, with an efficiency of more than 45% at input power 10 dBm.]]>294288290969<![CDATA[Cooperative Integration of RF Energy Harvesting and Dedicated WPT for Wireless Sensor Networks]]>294291293836<![CDATA[In-Band Digital Predistortion for Concurrent Dual-Broadband Phased Array Transmitters]]>$1times 4$ phased array antennas fed by a Ka-band power amplifier, a concurrent dual-band signal with modulated bandwidth of 200 MHz at 27 and 28.2 GHz can be effectively linearized with the processing bandwidth of only 240 MHz. The proposed method presents great effectiveness and a bright prospect for ultrabroadband multiband applications in future communication systems.]]>294294296725<![CDATA[A 16-QAM 100-Gb/s 1-M Wireless Link With an EVM of 17% at 230 GHz in an SiGe Technology]]>$mu text{m}$ SiGe HBT technology featuring full chip-on-board packaging. Using a 16-quadrature amplitude modulation, data rates from 20 to 100 Gb/s with an error vector magnitude from 7% to 17% were achieved at a 1-m distance. Thanks to the new mixer-first Rx, the maximum data rate improved from 90 to 100 Gb/s compared with our previous work using the amplifier-first Rx. The peak performance was reached at 230 GHz. The Tx operates at a 3.5 dB backoff from $text{P}_{textbf {sat}}$ showing a 3-dB RF bandwidth (BW) of 28 GHz, a $text{P}_{textbf {out}}$ of 5 dBm, and an IQ imbalance below 0.7 dB. The Rx features a peak conversion gain of 8 dB, a single-sideband noise figure of 14 dB, a 3-dB RF BW of 26 GHz, and an IQ imbalance below 1 dB. This letter also provides an analysis of the RF front-end imperfections related to the large link BW.]]>2942972991087<![CDATA[Random Multiplexing for an MIMO-OFDM Radar With Compressed Sensing-Based Reconstruction]]>294300302913<![CDATA[Microwave Sensing Schemes of CPW Resonators Fully Printed on Humidity Sensitive Substrates]]>$S_{21}$ phase were used as the measurement variables. The sensor was proven highly sensitive and wide range. In the 60–100 %RH range, the frequency sensitivity of the sensor reached 3.88 MHz/%RH, and its phase sensitivity reached 1.25°/%RH.]]>294303305883<![CDATA[Design of Microwave-Based Angular Displacement Sensor]]>2943063081027<![CDATA[IEEE Microwave and Wireless Components Letters information for authors]]>294C3C3110