The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The design and performance of a compact 6–18GHz power amplifier MMIC utilizing 0.2 pm gallium nitride (GaN) high electron mobility transistor (HEMT) technology is presented. An output power of 41.4 dBm to 43.3 dBm (average 42.3dBm) with over 16 dB power gain and a power added efficiency (PAE) of 21% to 35% over the band of 6–18 GHz under a drain voltage of 28 V in CW mode have been achieved. The chip...
The design and performance of a compact 6–18GHz power amplifier MMIC utilizing 0.2 μm gallium nitride (GaN) high electron mobility transistor (HEMT) technology is presented. An output power of 41.4 dBm to 43.3 dBm (average 42.3dBm) with over 16 dB power gain and a power added efficiency (PAE) of 21% to 35% over the band of 6–18 GHz under a drain voltage of 28 V in CW mode have been achieved. The chip...
The recovery voltage method based on the time domain dielectric response, as a non-destructive electrical diagnostic method, is widely used in condition diagnosis of oil-paper insulation power transformers. However, its main characteristics are insufficient to distinguish the respective effects of thermal aging and moisture on oil-paper insulation. At present, some scholars have studied on how to...
The mid-wavelength infrared (MWIR) imageries of Suomi-NPP Visible Infrared Imaging Radiometer Suite (VIIRS) and HIMAWARI-8 Advanced Himawari Imager (AHI) enable monitoring temperature variation of heat sources such as hot spots and urban heat islands. The 3.75 um band of VIIRS provides imagery in high spatial resolution (∼375 m) twice a day and can be used to monitor temperature variation of hot spots...
Material-based thermal compensation and temperature monitoring are combined to improve the thermal stability of wavelength measurement systems. Experimental results show that the frequency drift can be reduced more than three orders of magnitude.
A portable, real-time, wireless indoor air monitoring system is designed using the Arduino Yun platform. Because of the importance of a clean indoor environment on human health, the proposed prototype is designed to monitor the temperature, humidity, volatile organic compounds (VOCs) and miniature dust particles. The Arduino Yun platform incorporates an MCU that acquires and sends the data to a Wi-Fi...
Oxygen vacancies were introduced by MgO additive in alpha-Al2O3 transparent ceramics and formed the F and F+-centers which are the main contribution to luminescence. TL curves showed three peaks at 368, 456 and 614 K, respectively.
Wireless sensor networks (WSNs) have promised us a new monitor and control model over the distributed computing environment. In general, these networks consist of a large number of sensor nodes densely distributed over the region of interest for collecting information or monitor & track certain specific phenomena from the physical environment. Network management in WSNs becomes extremely important...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.