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A Ka-band push-push oscillator and a Ku- band fundamental oscillator designed using GaAs pHEMT 0.15 mum technology are reported in this paper. The use of finite ground CPW structure that enhanced Q value of the passive element and improved the phase noise with the value of -113.2 dBc/Hz at 1 MHz offset of the push-push oscillator. The push-push oscillator achieves an oscillating frequency of 30.3...
In this paper, we propose a power assist system that amplifies sinusoidal human's torque and attains minimization of control input requirement using an impedance control and resonance. This impedance control is designed to realize the following features: 1) sinusoidal torque amplification. 2) Minimization of control input requirement by adjusting stiffness. 3) No requirement for the knowledge of amplitude,...
Impact of reflections on SNR in single-stage EDFA based long-haul communication systems is investigated numerically and experimentally. Necessity of EDFA's input isolator and return losses of passive elements are discussed.
In this study a wideband coplanar active microstrip integrated antenna has been designed for satellite related applications. The frequency for this particular design ranges from 3.7 to 12.2 GHz. This covers C and K bands which are 3.7 to 4.2 GHz and 11.7 to 12.2 GHz respectively. To allow the dual band reception the antenna was designed to reject the other frequencies and thus behaves like a band...
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