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Background The Beijing Electron Positron Collider (BEPCII) is a high-brightness collider and operates in compatible mode of synchronous light source. This summer, BEPCII spare cavity, which was all made in China, had been put into BEPCII operation, and the LLRF system for the spare cavity was also upgraded at the time. Purpose The purpose is to stably control the amplitude and phase of the spare...
This paper designs a vertical-interconnect transmission structure which could be applied in PoP(Package on Package) package structure. In this model, Through Mold Via(TMV) transmission structure is utilized to realize inter-side and stacked-model interconnection. A quasi-coaxial via cluster connected to the strip line is designed for vertical RF transmission. It was found that the center distance...
In this paper, the potential influencing factors of BGA, such as shape, center distance and misalignment, were investigated and analyzed in the bands from DC to 20GHz by HFSS. In the model, two coplanar waveguide (CW) lines were connected by a half coaxial configuration which formed by five BGA balls. After the simulation, it was found that the transmission performance is significantly influenced...
A three-stage 60-GHz power amplifier was implemented in a 65 nm CMOS technology. High-quality-factor slow-wave coplanar waveguides were used for input, output and inter-stage matching networks in order to improve the performance. In Class-A operation, the power amplifier exhibits a measured maximum linear power gain G of 18.3 dB at 55 GHz, with a 3-dB bandwidth of 8.5 GHz. The measured 1-dB output...
A differential power divider based on the Defected Ground Structure (DGS) operating at S-Band is developed. A novel DGS structure is proposed and its performance in the power divider is analyzed using a 3D full-wave simulator. The DGS structure can eminently realize miniaturization by comparing the operating frequency with the one without DGS and the one using conventional DGS. The return loss of...
A full-wave bridge rectifier with high conversion efficiency and high input range is proposed. A power dividing network is used to handle the low reverse breakdown voltage of Schottky diodes to achieve high input power. The defected ground structure is used to increase the coupling coefficient of the power-dividing network. The power-dividing network couple the input RF power into four differential-type...
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