We report on a simulation for terahertz aluminum gallium nitride (AlGaN)/gallium nitride (GaN) resonant tunneling diode (RTD) at room temperature by introducing deep-level defects into the polarized AlGaN/GaN/AlGaN quantum well. Results show that an evident degradation in negative-differential-resistance characteristic of RTD occurs when the defect density is higher than 10 cm , which is consis...

Material variations on an atomic scale enable the quantum mechanical functionality of devices such as resonant tunneling diodes (RTDs), quantum well infrared photodetectors (QWIPs), quantum well lasers, and heterostructure field effect transistors (HFETs). The design and optimization of such heterostructure devices requires a detailed understanding of quantum mechanical electron transport. NEMO...

Double-barrier GaAs/AlAs resonant tunneling diodes (RTDs) have become the promising elements for development of sub-mm and THz emitters. We report on fabrication RTD samples that were characterized via RF-reflectometry to determine parameters its equivalent circuit. By using numerical simulation we show coplanar transmission line with under study provides an amplification up 8 GHz.

• Convective heat transfer analysis was adopted to examine the performance of super critical CO2 with micro jet impingement. The coefficient for different operating conditions deduced. Analysis specific contribution conducted. Optimum alongside working condition ranges were presented. A new impingement correlation proposed. device a 206 µm nozzle diameter and standoff 7.3 fabricated used study ...

Deep inspiration breath-hold (DIBH) radiotherapy for left-sided breast cancer can reduce cardiac exposure and internal motion. We modified our in-house treatment planning system (TPS) to retrospectively analyze breath-hold motion log files to calculate the dosimetric effect of the motion during breath hold. Thirty left-sided supine DIBH breast patients treated using AlignRT were studied. Breath...

The MAX1464 can be easily configured to generate constant current excitation for sensors that is ratiometric to the power supply voltage for resistive transducer applications. Applications utilizing sensing elements with high temperature coefficients, TCR, such as piezo resistive bridges, RTDs, etc. are typically implemented with constant current excitation. This application note suggests a sim...

When developing new control, protection, and stability methods for power systems, it is important to study the complex interactions of the system dynamics with the real-time operation of the new methods. Historically hardware prototypes were developed to study these interactions. With the recent introduction of the much cheaper rapid hardware and software prototyping tools, developers are choos...