Active millimeter‐wave pyrometer

New Optical Pyrometer for Measuring the Temperature of Aluminum

Fiber-Optic Pyrometer with Optically Powered Switch for Temperature Measurements

We report the experimental results on a new infrared fiber-optic pyrometer for very localized and high-speed temperature measurements ranging from 170 to 530 °C using low-noise photodetectors and high-gain transimpedance amplifiers with a single gain mode in the whole temperature range. We also report a shutter based on an optical fiber switch which is optically powered to provide a reference s...

Modeling and Design of Microwave- Millimeterwave Filters and Multiplexers

Title of dissertation: MODELING AND DESIGN OF MICROWAVE-MILLIMETERWAVE FILTERS AND MULTIPLEXERS Yunchi Zhang, Doctor of Philosophy, 2006 Dissertation directed by: Professor Kawthar A. Zaki Department of Electrical and Computer Engineering Modern communication systems require extraordinarily stringent speci…cations on microwave and millimeter-wave components. In mobile and integrated communicati...

Scanning optical pyrometer for measuring temperatures in hollow cathodes.

Life-limiting processes in hollow cathodes are determined largely by the temperature of the electron emitter. To support cathode life assessment, a noncontact temperature measurement technique which employs a stepper motor-driven fiber optic probe was developed. The probe is driven inside the hollow cathode and collects light radiated by the hot interior surface of the emitter. Ratio pyrometry ...

Millimeterwave INP DHBT power amplifier based on poweroptimized cascode configuration

This letter describes the use of a power-optimized cascode configuration for obtaining maximum output power at millimeter-wave (mm-wave) frequencies for a two-way combined power amplifier (PA). The PA has been fabricated in a high-speed InP double heterojunction bipolar transistor technology and has a total active emitter area of 68.4 lm2. The experimental results demonstrate a small signal gai...