منابع مشابه
Time-domain Measurement of Antenna Q
A time-domain technique applicable to numerical and experimental application is used to determine the radiation Q of a turnstile antenna as a function of relatï e phasing between the two dipoles. Results confirm the theory that Q is a minimum with the dipoles in phase quadrature. Q 2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 25: 95]100, 2000.
متن کاملExtending the Definitions of Antenna Gain and Radiation Pattern Into the Time Domain
Many of the classical parameters of frequency domain (CW) antennas, such as gain and radiation pattern, are defined only in the frequency domain, and currently have no meaning in the time domain. The purpose of this note is to extend their definitions into the time domain. We develop here the concept of waveform norms as a mechanism for comparing the radiated field to the driving voltage. The c...
متن کاملEvaluation of Gain Measurement Method for Long Antenna Using Synthetic Aperture Antenna
A cellular base station antenna has a narrow beam width in the vertical plane because the length of the antenna is more than 10 λ. While generally long distance measurements are needed to measure the antenna with high accuracy, some measurement methods in a short-range anechoic chamber have been used. The compact range method [1-2] and near-far field transformation method [3-6] are very popular...
متن کاملThe Engineering Implement of Antenna Time-domain Near-field Measurement System
At present, a complete measurement system has been built up successfully by our laboratory, besides its engineering implement has been accomplished also. We can show an antenna’s radiation field in a form of 3D animation dynamically with this measurement system, which demonstrates the time-domain near-field measurement theory and the time-domain near-field measurement system are practical. The ...
متن کاملPicosecond-Domain Radiation Pattern Measurement Using Fiber-Coupled Photoconductive Antenna
The photoconductive terahertz measurement technique was used for measurement of the radiation pattern from thick metal slits. Picosecond pulses were generated and detected by an ultrafast optoelectronic technique using a femtosecond pulse laser and a subpicosecond photoconductor. Photoconductive sampling measurements of the polarization-dependent diffraction of the picosecond electromagnetic pu...
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ژورنال
عنوان ژورنال: The Journal of Korean Institute of Electromagnetic Engineering and Science
سال: 2012
ISSN: 1226-3133
DOI: 10.5515/kjkiees.2012.23.11.1217