USB
VIA MICRO WAVE
The
BrainWave is a desktop microwave that will come in handy for workaholics and
bookworms, who can’t seem to tear themselves away from their computer screens.
The appliance works with the C8 port connected to the mains and is controlled
through a computer application connected via USB. A RFID-tagged plastic spoon
comes along with specially packaged meals and scanning the tag transmits the
meal info to the microwave. This in turn auto sets the heating time. I’m not a
fan of ready-to-eat meals, but piping hot microwave spaghetti beats eating a
cold sandwich any day!
hermal
sensors can generally be divided into two main categories, thermocouple power
sensors and thermistor-based power sensors. Thermal sensors depend on the
process of absortbing the rF and microwave signal energy, and sense the
resulting heat rise. Therefore they respond to true average power of the
signal, whether it is pulsed, CW, AM/FM or any complex modulation. (Agilent
2008). Thermocouple power sensors make up the majority of the thermal power
sensors sold at present. They are generally reasonably linear and have a
reasonably fast response time and dynamic
range. The microwave power is absorbed in a load
whose temperature rise is measured by the thermocouple. Thermocouple sensors
often require a reference DC or microwave power source for calibration
before measuring; this can be built into the power meter. Thermistor-based
power sensors such as the Agilent 8478B are generally only used in situations where
their excellent linearity is important, as they are both much slower and have a
smaller dynamic range than either thermocouple or diode-based
sensors.Thermistor-based power sensors are still the sensor of choice for power
transfer standards because of their DC power substitution capability (Agilent
2006). Other thermal sensing technologies include microwave calorimeters
and bolometers,and
quasi-optic pulsed microwave sensors.
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