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We reported a new low-frequency active vibration isolation system called by compound pendulum which is mainly composed of a pair of two-dimensional elastic reeds and two pendulums. The response to the ground horizontal and tilt vibration of the compound pendulum is investigated. The simulations show that the compound pendulum is not only sensitive to low-frequency tilt vibration but also restrains...
An automatic computer controlled technique is proposed to measure the resonant frequency, loaded quality factor and coupling factor of a dielectric resonator coupled to a microstrip line. The complex transmission coefficient of the system is measured, as a function of frequency, by means of a network analyzer. At each frequency, the reflection coefficient is calculated and its magnitude is processed...
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