Journal ArticleDOI
An Automatic Precision IF-Substitution Vector Ratio Meter for the Microwave Frequency Range
TLDR
In this paper, a new automatic parallel intermediate frequency (IF) vector substitution principle is implemented in a dual-channel microwave vector ratio meter, and a combination of analog adaptive filtering and digital data processing provides short measurement times.Abstract:
A new automatic parallel intermediate frequency (IF) vector substitution principle is implemented in a dual-channel microwave vector ratio meter. A greater than 120-dB dynamic range and 0.001-dB and 0.1° resolutions are provided. A combination of analog adaptive filtering and digital data processing provides short measurement times. Theoretical performance limitations are analyzed.read more
Citations
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Journal ArticleDOI
Attenuation and ratio—National standards
H. Bayer,F.L. Warner,R.W. Yell +2 more
TL;DR: In this article, the most popular attenuation measurement techniques are: RF, IF, vector IF and AF substitution; power ratio, voltage ratio, time-interval ratio, and six-port methods; and a procedure that employs a Josephson junction in a superconducting ring.
Journal ArticleDOI
National standards and standard measurement systems for impedance and reflection coefficient
A.P. Jurkus,U. Stumper +1 more
TL;DR: A review of the current status of national impedance and reflection standards at RF and microwave frequencies is presented in this paper, where various proposals are examined for realizing a given characteristic impedance, or a calculable value of reflection coefficient, both in coaxial lines and in hollow rectangular waveguides.
Journal ArticleDOI
Estimation of uncertainty in impedance measurement at narrow and broadband microwave frequencies
TL;DR: In this paper, the authors report the analysis and improvement in the measurement uncertainty of impedance (reflection coefficient ∣Γ∣ and phase-shift ψ) measurement techniques at microwave frequencies using laboratory-developed standards.
Patent
Apparatus for analysing two-channel transmission/reflection characteristics
Hiroshi Itaya,Goro Saito +1 more
TL;DR: In this article, a reflection signal separator (35) has an output port (35b), and reflection signals sent from the test port and transmission signals via the through transmission path (45) are stored in first to third memory means (39, 40, 41) via heterodyne receivers (36, 37) having first and second levels correcting function.
References
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Journal ArticleDOI
Harmonic Mixing with an Anti-Parallel Diode Pair
TL;DR: In this paper, an analytical and experimental investigation of the properties of an antiparallel diode pair is presented, which has the following unique and advantageous characteristics as a harmonic mixer: reduced conversion loss by suppressing fundamental mixing products; lower noise figure through suppression of local oscillator noise sidebands; suppression of direct video detection; inherent self protection against large peak inverse voltage burnout.
Journal ArticleDOI
Relative Voltmeter for VHF/UHF Signal Generator Attenuator Calibration
Journal ArticleDOI
A Standard Attenuator and the Precise Measurement of Attenuation
D. L. Hollway,F. P. Kelly +1 more
TL;DR: In this article, an attenuator calibration system consisting of a waveguide-beyond-cutoff (WBE) attenuators operating at 31.25 Mc and electronic equipment designed for parallel substitution, series-substitution, and heterodyne measurements is described.
Journal ArticleDOI
A Method of Calibrating Standard-Signal Generators and Radio-Frequency Attenuators
TL;DR: In this paper, the relative magnitudes of radio-frequency signals are measured by passing the signals through a linear heterodyne frequency-convertor and comparing the magnitudes with those of signals from a standard i.f. generator of known performance.