نتایج جستجو برای: vector network analyzer

تعداد نتایج: 865903  

2008
Karl Will Tobias Meyer Abbas Omar

This paper introduces an interferometric technique for the phase measurement of microwave devices. A handheld vector network analyzer (VNA) is presented for HF and VHF applications. A wideband synthesizer with multiple synchronized outputs is developed for extending the frequency range to the microwave band. The phase differences between the output signals can be set digitally with sub-degree a...

2016
Sweety Jain Pankaj Kumar Mishra Vandana Vikas Thakare

The paper summarize that moisture sensor based on microstrip patch antenna. Microstrip patch sensors have become useful and widely used in every fields such as agricultures, industrials, food products, medicals communication etc. It have been more useful for detecting i.e., broken rice detection, Impurities detection in water, Soil moisture measurement, Rice Grain moisture, Rice quality detecti...

2011
Karam Noujeim Jon Martens Tom Roberts

An overview of the high-frequency reflectometer technology deployed in Anritsu’s VectorStar Vector Network Analyzer (VNA) family is given, leading to a detailed description of the architecture used to extend the frequency range of VectorStar into the high millimeter waves. It is shown that this technology results in miniature frequency-extension modules that provide unique capabilities such as ...

Journal: :IEEE Transactions on Information Theory 2004

Journal: :IEEE Transactions on Instrumentation and Measurement 2023

This article describes an established D-band waveguide impedance standard. The 8-term vector network analyzer (VNA) error model is used for our measurement system. A set of shims, a flush short, thru, and reciprocal device are as calibration standards to determine the coefficients VNA model. From measured raw scattering parameters dimensions each shim, model, propagation constant reflection coe...

Journal: :The Annals of Statistics 2017

2010
Duje Čoko Dinko Begušić Zoran Blažević

The ultra-wideband wireless personal area networks are expected to be most commonly employed in desktop environments. This paper presents a measurement campaign conducted on a typical office desk. A pair of omnidirectional UWB antennas and a vector network analyzer were used to measure the impulse responses over a frequency range spanning from 6 GHz to 8.5 GHz, in accordance with the UWB regula...

Journal: :Optics express 2005
Zhaolin Lu Shouyuan Shi Christopher Schuetz Dennis Prather

We studied a two-dimensional square-lattice photonic crystal with all-angle negative refraction at its first band. Using this photonic crystal, we designed and fabricated a flat lens functioning as a cylindrical lens by increasing the vertical dimension of the photonic crystal. Two-dimensional finite-difference time-domain simulation validated negative refraction imaging. To perform the experim...

Journal: :IEEE Trans. Instrumentation and Measurement 2000
Gian Luigi Madonna Andrea Ferrero Marco Pirola Umberto Pisani

This paper describes a new approach for fast and accurate determination of the source reflection coefficient in microwave source-pull measurements. To the authors' knowledge, this is the only technique that allows the simultaneous measurement of the source and the device-under-test input reflection coefficients. A traditional vector network analyzer is used as a four-channel receiver. The calib...

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