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In this work, substrate integrated waveguide (SIW) bandpass filters were designed and fabricated using LTCC process. The proposed scheme consists of SIW cavities with coupling slots and coplanar waveguide (CPW) transitions. To reduce the component size and surface occupation, three SIW cavities are laminated vertically. Both horizontal transition and vertical transition are used between the two CPW...
A dual-band bandpass filter with dual coupling paths is presented in this work. The filter is formed of two dual-mode patch resonators, one half-wavelength or full-wavelength straight-line resonator and a hair-pin resonator. The patch resonators act as a signal splitter, combiner and resonant pole in the dual-band bandpass filter. The patch resonators are coupled with the hair-pin and the straight-line...
For the battery/super-capacitor hybrid system as the wireless power transfer system load, it is rarely discussed. In this paper, the characteristics of such a system are considered, a charging topology is proposed. And a control strategy is proposed to not only meet the requirements of the system energy output, but also maintain the high efficiency of the system based on rational design of power allocation...
It might not seem dangerous for a person to leave some pieces of personal information on the Internet since everyone tends to do this. But the truth is that if someone ever tries to collect those pieces of information together, he might be able to find out the true identity of the person in reality after analyzing the collected data, which is what we call “cyber hunting”. This work focuses on the...
Dualband Bandpass Filter (BPF) is a microwave device used in communication systems for selecting two wanted frequency bands while rejecting the unwanted frequencies. A Dual-band BPF provides the opportunity to have two BPF's built together. It reduces cost and can occupy less space when compared with two BPF's with the same properties. In [1] three pairs of U-shaped resonators were coupled in a parallel...
Diplexers are three-port filtering devices with a junction connecting two channel filters; the common port connects to an antenna which serves the two channel filters bearing the second and the third port. Conventionally, diplexers are designed using transmission line based junctions or circulators, but recently a new approach of designing diplexers with resonant junctions was introduced and this...
An effective coupling topology for multi-phase oscillators is proposed and demonstrated in a standard 90nm CMOS technology. Compared with the conventional parallel or series coupling methods, the PMOS-source-follower coupled (PSFC) technique with the coupling transistors operated in the cut-off region can significantly reduce the flicker noise and hence the phase noise of VCO. The proposed PSFC QVCOs...
A new technique for coupling the electromagnetic, thermal, and air-flow analysis is proposed especially for electric machines that exhibit a reduced dependency of core losses with temperature and load, and have low rotor losses. Within the overall iterative loop, another inner loop that cycles only the thermal calculations and employs a simplified model for estimating losses is introduced. The thermal...
This paper presents a frequency-agile bandpass filter with constant absolute bandwidth and high linearity. The proposed resonator is composed of an open-ended transmission line with back-to-back varactor diodes loaded at one end. A novel mixed electric and magnetic coupling scheme is proposed to contorll the coupling coefficients in order to keep the bandwidth constant when the frequency is tuned...
A novel micromachined coupled-resonator waveguide diplexer operating in frequency range 220–325 GHz is presented. The diplexer has been synthesised using coupling matrix optimization of multiple coupled resonators, and constructed with innovative structure using micromachining technology. The diplexer structure consists of waveguide cavity resonators, waveguide extensions, and embedded bends, and...
Using Lyapunov function approach, some sufficient conditions about the existence and global asymptotic stability of a cluster synchronization invariant-manifold in a non-diffusively coupled network are derived. The effectiveness of the sufficient conditions is illustrated by an example. In addition, the example also shows that cluster number can vary as coupling strength varies.
Linkage control panels are important parts of the port machinery cab, weather it is correctly operated is directly impact the usable of the machine. Based on the theories and principles of ergonomics, took the crane cab of Shanghai Zhenhua port machine company as an research object, optimization suggests about how to layout the linkage control panels in the space and how to position the control elements,...
The developed nonlinear permanent magnet synchronous machine (PMSM) model established a virtual model to simulate and assess the sensorless drive schemes for PMSMs avoiding the experimental trial and error method. In this paper, three sensorless PMSM drive schemes are investigated and compared, which are all based on the high frequency signal injection. The nonlinear PMSM machine model is employed...
Plug-in hybrid electric vehicle (PHEV) depends mostly on the electric drive system where the internal combustion engine just acts as the auxiliary unit, which has strict constraints for the drive machine. According to the Toyota Prius configuration, one novel PHEV drive system in this paper has been brought forward which primarily includes one drive machine operating as both motor and generator, energy...
The train propelled by a single-sided linear induction motor (SLIM) has been paid much attention recently by both academia and industry. The SLIM drive has advantages such as the direct thrust without the need of friction between wheel and railway track, small cross-sectional area, lack of gear box, and flexible line choice thanks to the greater climbing capability and smaller turning circle compared...
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