In opinion of substructure cascade, multimode feed network is composed of impedance transforming substructure and isolating substructure. Starting from the characteristic of the substructure in multimode feed network, a method of measurement for its three-port scatter parameters of substructure is presented, based on the applying of the available two-port vector network analyzer (VNA), consider...

Thisstudy describes the person thinking that how brain communicates through handwriting styles, thinking behavior using brainwaves and brain activity models. Everything put on paper is a response of two way circuit between brain and motor reflex muscles of hand. Brain can work on different layers and multiple voxel. Different layers communication are interconnected with each other, Coding of br...

This paper provides a principal overview of the time domain measurement instrumentation and information about the implementation of the time domain option in the Agilent PNA microwave network analyzer E8364A. The paper also presents practical experiences with antenna measurements realized by sweep mode of a vector network analyzer with data processing in a time domain. The new single antenna me...

Abstract This paper reports the use of non destructive, microstrip patch antenna as moisture sensor. Microstrip is designed to resonate at 2.4GHz. design simulated and fabricated on copper clad type FR4 (εr= 4.4) having thickness 1.6mm. Patch dimension are 27mm × 30mm substrate 63mm 60mm. The transmission line used provide excitation for antenna. after fabrication showed a resonance 2.38 GHz ve...

Received Jan 13, 2018 Revised Mar 15, 2018 Accepted Mar 30, 2018 Quartz Crystal Microbalance (QCM) is a device that allows non-destructive measurements of r in situ reaction activities. In this article, an array comprising of six 3MHz QCM sensors in an array were characterized using a vector network analyzer and OpenQCM, a portable measuring instrument that measures change in resonance frequenc...

To study the S-parameters and dielectric permittivity of polycor GaAs samples, a vector network analyzer R4-MWM-118 with special measuring cell modified Nicholson–Ross–Weir method were used. The use polynomial Chebyshev criteria in for approximation digital filtering made it possible to reduce distortion achieved approximations S-parameters. eliminate subjective error operator analysis measurem...

We present a 2-port terahertz vector network analyzer (VNA) based on four continuous-wave (CW) photomixers and pair of telecom-wavelength CW lasers. The presented optoelectronic VNA is free-space coupled can operate continuously from 0.1 THz to 1 with resolution 2 MHz. demonstrate two different applications it: the determination material properties quartz wafer characterization distributed Brag...

Observations of surface deformation are essential for understanding a wide range of geophysical problems, including earthquakes, volcanoes, landslides, and glaciers. Current geodetic technologies, such as global positioning system (GPS), interferometric synthetic aperture radar (InSAR), borehole and laser strainmeters, are costly and limited in their temporal or spatial resolutions. Here we pre...