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This paper presents an important improvement on Sherman’s method for angle estimation of two unresolved targets when using monopulse radar. The graphical or numerical solution for the 6th-order polynomial equation is replaced with a quadratic equation that has exact algebraic solutions for nonfluctuating or slowly fluctuating targets. The proposed method can also estimate the angle for a single target...
This paper describes designing a tip-tilt-piston motion controller of fast steering mirror(FSM) in the Giant Magellan telescope(GMT) as a preliminary study. The mathematical model of tip-tilt-piston motion system of FSM is derived by using second-order differential equation approximation, which the overall model is considered as Multi-Input Multi-Output(MIMO) system. Based on this model, a H∞ controller...
In a printed circuit board (PCB), a guard trace can be used to reduce crosstalk between adjacent traces. Regularly-spaced vias are generally used to connect the guard trace to the solid ground plane underneath it. However, when the ground plane is slotted or gapped, this approach may not be possible due to the openings. This paper proposes to solve this problem for slotted ground planes by using a...
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