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A 8–12 GHz monolithic microwave integrated circuit (MMIC) low noise amplifier (LNA) was designed for X-ray astronomy with cryogenic temperature and under radiation. The LNA was fabricated using a 0.15µm gate length GaAs-based pseudomorphic high electron mobility transistor (pHEMT) process. At 10 GHz, the LNA module has a gain of 32.7 dB and a noise figure of 2.1 dB at 300 K. The module was cooled...
The multi-stage GaN amplifier with dual output power was explained for the application of microwave communication and power transmission. For the compact transmitter, single-tone and time-division operation is adopted in this study. The maximum output power of 91.8 W and the PAE around 55.4 % were obtained at 2.1 GHz in the high power transmitter operation. In the low power transmitter operation,...
This research proposes a wide power range operable 3-stage microwave rectifier for microwave wireless power transfer systems. The proposed rectifier is fabricated and measured at S-band. The proposed rectifier system consists of three rectifiers which has different operational range. Also, the system automatically selects the appropriate rectifier based on input power level. The rectifiers utilize...
High power operable and miniaturized rectifier is one of the most important issues for spacecraft health monitoring system. This is because the flexibility of location, number, and power consumption regarding sensor tag is indispensable for reliable health monitoring. Previous single rectifiers focusing on schottky diode are unsuitable since operating at high power and considering integrated MMIC...
A small size low noise amplifier (LNA) module operating at 10GHz capable of a cryogenic cooling for radio astronomy is presented. The LNA has been fabricated using a 0.15μm gate length GaAs-based pseudomorphic high electron mobility transistor (pHEMT) monolithic microwave integrated circuit (MMIC) technology. This MMIC amplifier is a single chip consisting of three-stages was assembled in a module...
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