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A compact E plane of 10 dB rectangular waveguide directional coupler with different lengths of branch waveguide operating at the center frequency of 340 GHz is presented. The coupler is fabricated using the micro-fabrication technology of deep reactive ion etching (DRIE). The S-parameter is measured by the two-port vector network analyzer and the result is consistent with that of simulation, which...
In this paper, the contour tracking control of multi-DOF serial robots is developed for the first time and a new cross coupling control algorithm is proposed, based on contour errors of the end-effector and tracking errors of the joints. The contour error of the end-effector is transformed to the equivalent tracking errors of the active joints by the Jacobian regulation, and the control law is implemented...
We present the design and realization of strong light-matter coupling in monolithic metamaterial nanocavities. We achieve a Rabi frequency of 2.5 THz (corresponding to a polariton splitting of 20%) in a mode volume of 1.34×10−3(λ/n)3.
In this paper, a wireless power transfer (WPT) system based on two spiral magnetic-coupled resonators is studied and realized on the printed circuit board (PCB). For the mid-range energy transfer, the microwave filter design theory can be employed to explain the basic principle of magnetic induction in WPT system. Based on the filtering transfer function, the power transfer efficiency is defined by...
In this paper, the new elements in 3DIC are examined for enabling optimal 3D products: including 3D interconnect which maybe the limiting factor to achievable speed; 3D chip design strategy (partition and implementation) to achive optimal performance; wireless testing to address the challenges in testing a partial system / chip before stacking and with limited observation points after stacking.
The physics-based phase variable model of permanent magnet synchronous machines is developed for the simulation study of machine control. The parameters of the physics-based phase variable model, inductances and flux linkages are calculated from the solutions of nonlinear FE computation covering a complete AC cycle to consider the geometry details, the rotor position, the armature currents, and the...
This paper presents an approach for performing the hardware-in-the-loop simulation of PWM-based drive utilizing the physics-based phase variable machine model to represent the actual machine. A 6-pole 2 hp permanent magnet synchronous machine is used as an example. The physics-based phase variable model of the sample machines is built with parameters (inductances, flux linkages, and the cogging torque)...
The physics-based phase variable model has been developed for several types of machines and transformers. The parameters (inductance/flux linkage) of the physics-based phase variable model were determined using the solutions of field computation to actually reproduce their variations during the machine operation. The developed physics-based phase variable model has the advantage over the conventional...
This paper describes the mutual consistency maintenance mechanism used in a prototype Data Traffic Management System (DTMS), which was designed and implemented to integrate several independent and stand-alone data systems owned by the U. S. Army, Corp of Engineers (CE). The major design constraints were that no modification to the data systems involved were allowed and that the update to each duplicate...
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