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- W2041802023 abstract "A unique new type of RF ammeter is described. The ammeter combines broad frequency coverage with broad current range and is designed for use in a 50-ohm coaxial transmission line. The ammeter consists of an elliptic-cylinder silver reflector of infrared energy with a cylindrical thick-film heater along one focus and a heat-sensing thermopile along the other focus. Advantages over older ammeter designs include a shielded construction with inherent electrical isolation between the RF and dc circuits, a large dc output (approximately 1-100 mV) corresponding to a decade dynamic range (0.25-2.5 amperes), and a frequency range from dc to about 1 GHz. This coaxial ammeter is believed to be the first to have very low standing-wave ratio (SWR) (1.03) in a 50-ohm transmission line. Ammeters of lower current range can be built, but at a penalty of increased SWR due to the larger heater resistance required." @default.
- W2041802023 created "2016-06-24" @default.
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- W2041802023 date "1970-01-01" @default.
- W2041802023 modified "2023-09-25" @default.
- W2041802023 title "New Coaxial RF-DC Ammeter" @default.
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- W2041802023 doi "https://doi.org/10.1109/tim.1970.4313921" @default.
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