This paper presents design and characterization of single-chip 110-170-GHz ( D-band) direct conversion in-phase/quadrature-phase (I/Q) transmitter (TX) receiver (RX) monolithic microwave integrated circuits (MMICs), realized in a 250-nm indium phosphide (InP) double heterojunction bipolar transistor (DHBT) technology. The chipset is suitable for low-power ultrahigh-speed wireless communication can be used both homodyne heterodyne architectures. TX consists an I/Q modulator, frequency...

This paper presents the design and characterization of single-chip 220-GHz heterodyne receiver (RX) transmitter (TX) monolithic microwave integrated circuits (MMICs) with antennas fabricated in 0.1- μm GaAs metamorphic high electron-mobility transistor technology. The MMIC consists a modified square-slot antenna, three-stage low-noise amplifier, sub-harmonically pumped resistive mixer on-chip local oscillator frequency multiplication chain. chip is dual by inverting direction RF amplifier....

The present work investigates the temperature distribution, heat transfer rate, efficiency and optimization of porous pin fins in fully wet conditions. thickness varies along length fin lateral surface equation is defined as functions that include diversification (rectangular, triangular, convex parabolic concave sections). Fins are made aluminium tips insulated. Furthermore, it assumed coefficient depends on changes according to changes. In order derivethe equation, energy balance Darcy...

Two single-chip frequency multiplier chains targeting 118 and 183 GHz output frequencies are presented. The chips fabricated in a 0.1 ¿m GaAs metamorphic high electron-mobility transistor process. D-band doubler chain covers 110 to 130 with peak power of 5 dBm. chip requires 2 dBm input consumes only 65 mW dc power. signal at the fundamental is suppressed more than 25 dB compared desired over band interest. G-band sextupler (×6) 155 195 0 6.5 92.5 can be reduced 4 while drops by 0.5 dB....

In this paper, laminar fluid flow and heat transfer in channel with permeable walls the presence of a transverse magnetic field is investigated. Least square method (LSM) for computing approximate solutions nonlinear differential equations governing problem. We have tried to show reliability performance present compared numerical (Runge–Kutta fourth-rate) solve The influence four dimensionless numbers: Hartmann number, Reynolds Prandtl number Eckert on non-dimensional velocity temperature...

We present the theory of high-order modulation for near-field RF identification (RFID) and wireless power transfer (WPT) systems. show that while related, design RFID WPT systems differ. The calculation load modulated quadrature amplitude (QAM) phase shift keying (PSK) is presented. then two experimental prototypes. first demonstrates a 16-QAM link achieving 480 kb/s at 2.38-MHz carrier (>19.8 fractional bandwidth), significantly higher than 1% bandwidth traditional second prototype 4-PSK...

Abstract. Analytical and numerical analyses have been performed to study the problem of magneto-hydrodynamic (MHD) flow heat transfer an upper-convected Maxwell fluid in a parallel plate channel. The governing equations continuity, momentum energy are reduced two ordinary differential equation forms by introducing similarity transformation. Homotopy Analysis Method (HAM), Perturbation (HPM) fourth-order Runge-Kutta method (NUM) used solve this problem. Also, velocity temperature fields...

A cryogenic wideband 4-8 GHz hybrid low-noise amplifier, based on a 110 nm gate length InAs/AlSb HEMT process is presented. At room temperature the three-stage amplifier exhibited transducer gain of 29 dB and noise 150 K with 17.6 mW power consumption. When cooled to 13 K, showed minimum 19 at consumption 6 (66% reduction compared temperature). temperature, optimum drain voltage for best performance was reduced from 0.55 V down 0.3 V, demonstrating very low-power low-voltage capabilities...

In this paper, we have tried to find a solution for quick transfer of nuclear wastes from pools cool water dry stores reduce the environmental concerns and financial cost burying atomic waste. Therefore, rate heat waste materials outer surface container should be increased. This can achieved by covering bottom pool space with conical fins (vertically) embedded in porous medium allowing natural convection flow Newtonian nanofluid upon it. research, studied using such special space. study,...

A compact two-stage differential cascode power amplifier is designed and fabricated in 45 nm standard LP CMOS. The configuration, with the common gate device placed a separate P-well, provides reliable operating condition for devices. shows 20 dB small-signal gain centered at 60 GHz flat frequency response 1-dB bandwidth of 10 GHz. broadband large-signal operation also ensured by providing constant load resistance to both stages over entire band coupling them dual resonance matching network....

Traditional hollow metallic waveguide manufacturing techniques are readily capable of producing components with high-precision geometric tolerances, yet generally lack the ability to customize individual parts on demand or deliver finished low lead times. This paper proposes a Rapid-Prototyping (RP) method for relatively low-loss millimeter-wave waveguides produced using consumer-grade stere-olithographic (SLA) Additive Manufacturing (AM) technology, in conjunction an electroless...

This paper presents design and characterization of D-band (110-170 GHz) monolithic microwave integrated quadrature up- down-converting mixer circuits with on-chip RF local oscillator (LO) baluns. The are fabricated in 250-nm indium-phosphide double heterojunction bipolar transistor technology. mixers require an external LO signal can be used as direct carrier modulator demodulator to implement higher order amplitude modulation formats. up-converter has a single-sideband (SSB) conversion gain...

In this paper, the design and characterization of a broadband image reject mixer for next generation point to-point microwave links is presented. The manufacturing has been made in commercially available 0.15 mum gate length GaAs mHEMT technology. measured performance demonstrates conversion loss 9 dB an rejection ratio 25 on average across full E-band (71-76 81-86 GHz). Performance peaks at 77 GHz with 7 40 dB. Furthermore, these results have achieved LO power requirement 4 dBm. To best...

Wireless power transfer (WPT) has gained renewed interest due to emerging low-power applications and high efficiency. Coupled with in many is the need for communication, whether regulation of or information between source load. Several communication methods have been proposed use WPT, including adjacent channel (non-WPT), as well WPT-based methods, such load modulation passive backscattering. However, approaches using WPT link historically low-speed (<;400 kb/s). In this letter, we report on...

<title>Abstract</title> This numerical simulation study investigates a pillow plate heat exchanger, exploring the influence of changes in channel height, longitudinal, and transverse distances welding points on Nusselt number, friction factor, thermal performance across range Reynolds numbers from 1000 to 7000. The fluid inlet temperature is held constant at 298 K, with flux 5000 W/m² applied both upper lower plates all simulations, providing consistent basis for comparison. Firstly,...

This paper introduces the use of coupled transmission lines structure for impedance matching networks which is suitable power amplifier design at millimeter-wave frequency bands. The can replace conventional stub and MIM (Metal-Insulator-Metal) capacitors DC blocking. Five MMIC amplifiers have been designed based on transformers 35 GHz, 60 GHz 100 GHz. fabricated two-stage PA has a small-signal gain 20 dB input output reflection coefficients less than −10 deliver 16 dBm power. shows 15dB...

In this paper, we present results of work done in packaging highly integrated circuits based on 100nm mHEMT technology. We several examples fully receivers and sources for frequencies bands 90-130 GHz 160-210 GHz. The are packaged into waveguide blocks, characterized compared to on-wafer measurements. Waveguide microstrip transitions 50 um alumina substrate, including via holes, used effectively interface the MMICs a rectangular at RF without using tuning structures resonate wire-inductance....

In this letter, we present results of fully integrated 90-130 GHz receiver based on 100 nm mHEMT technology. The contains a low noise amplifier (LNA), mixer and LO multiplier chain into single monolithic microwave circuit (MMIC). is packaged waveguide block, characterized compared to on-wafer measurements. Waveguide microstrip transitions are used interface the MMIC waveguide. A breakout LNA also packaged, its performance receiver. was wafer after packaging. module measured at both room...

In this present study, the problem of two-dimensional magnetohydrodynamic (MHD) boundary layer flow steady, laminar an incompressible, viscoelastic fluid in a parallel plate channel with slip at boundaries is presented. The upper convected Maxwell model implemented due to its accuracy simulating highly elastic flows high Deborah numbers. Moreover, paper deals solution third order nonlinear ordinary differential equations which are solved by using three analytical approximate methods, namely...

A highly linear low-noise amplifier (LNA) based on a commercial Gallium Nitride (GaN) high electron mobility transistor (HEMT) technology is presented. The can be operated at three frequency bands of 1, 2 and 3 GHz. maximum measured gain 31 dB 1GHz the output referred third-order intercept point (OIP3) constant for all equal to 41±1 dBm power consumption 1.2 W. minimum noise figure (NF) 0.5 same bias demonstrating simultaneous linearity low performance. presented performance together with...