In this paper, an experiment study with aspect ratio 100 of a circular cylinder was conducted in wave-current channel. The FBG sensors were attached on the which are used to capture vibration signal, two high-precision bellows type monitor fluctuant support force, and dynamic response finally calculated by modal analysis method. effect flow velocity, mass top tension amplitude ratio, frequency ...

The objective of this research was to design a 2.4 GHz class AB Power Amplifier (PA), with 0.18um Semiconductor Manufacturing International Corporation (SMIC) CMOS technology by using Cadence software, for health care applications. The ultimate goal for such application is to minimize the trade-offs between performance and cost, and between performance and low power consumption design. This pap...

To coordinate the robot manipulator along the desired trajectory, the exact model of the dynamics is required. The added mass and added moment of inertia, buoyancy, drag force, and friction mainly affect the dynamics of the undersea robot manipulator, and they are quite complex and unknown. In this reason, the exact model of the undersea robot manipulator is difficult to obtain. In this paper, ...

—A 48 GHz fully integrated two stages power amplifier (PA) for mm-wave application is presented in this paper. The PA is implemented in 90 nm LP CMOS technology with Cascode topology to enhance gain and stability. The single ended PA achieves around 15 dB small signal gain, 4.5 dBm saturated output power and a peak power added efficiency of 9% in measurement. Patterned ground shield coplanar tr...

The Internet is rapidly changing from a set of wires and switches that carry packets into a sophisticated infrastructure that delivers a set of complex value-added services to end users. Services can range from bit transport all the way up to distributed value-added services like video teleconferencing, data mining, and distributed interactive simulations. Before such services can be supported ...

One of the most important requirements that RF and microwave power amplifiers designed for radiocommunication systems must meet is an optimum power added efficiency (PAE) or an optimal combination of PAE and linearity. A harmonic active load–pull system which allows the control of the first three harmonic frequencies of the signal coming out of the transistor under test is a very useful tool to...

A Class F power amplifier (PA) at 2.5GHz has been designed and fabricated. Test results show 15.7 dB gain with 75.75% power added efficiency (PAE ), at an input level of 25 dBm. The design procedure is presented, with various issues illustrated and addressed. A new method is proposed to obtain the optimum load and source impedances without iterations, which would usually be necessary.

This paper presents a new procedure to design of high efficiency class E power amplifiers (PAs) using nonlinear transistors. The active device (MESFET-ATF34143) has been investigated and load harmonic networks have also been designed to match the requirement. By using the new procedure, the power added efficiency (PAE) of PAs could be increased to over 70%. The effect of the stabilized resistor...