title: Measurements of complex impedance in microwave high power systems with a new bluetooth integrated circuit.
abstract: By using a new integrated circuit, which is marketed for bluetooth applications, it is possible to simplify the method of measuring the complex impedance, complex reflection coefficient and complex transmission coefficient in an industrial microwave setup. The Analog Devices circuit AD 8302, which measures gain and phase up to 2.7 GHz, operates with variable level input signals and is less sensitive to both amplitude and frequency fluctuations of the industrial magnetrons than are mixers and AM crystal detectors. Therefore, accurate gain and phase measurements can be performed with low stability generators. A mechanical setup with an AD 8302 is described; the calibration procedure and its performance are presented.
authors.affiliation: Laboratoire de Spectroscopie et des Techniques Microondes, Universite Henri Poincare, Nancy, France.
authors.forename: Georges
authors.initials: G
authors.lastname: Roussy
authors.forename: Bernard
authors.initials: B
authors.lastname: Dichtel
authors.forename: Haykel
authors.initials: H
authors.lastname: Chaabane
mesh_terms: D000669:Amplifiers, Electronic; D002138:Calibration; D017097:Electric Impedance; D004581:Electronics; D019544:Equipment Failure Analysis / Q000379:methods*; D008872:Microwaves; D011874:Radiometry / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity