Proposal of Accurate Sar-probe Calibration Using Reference Antennas in the Liquid at Higher Frequency
نویسندگان
چکیده
(1) Faculty of Engineering, Niigata University, 8050, Ikarashi 2-nocho, Niigata, 950-2181, Japan and E-mail: [email protected] (2) NTT Advanced Technology Co., 3-9-11, Midori-cho, Musashino, Tokyo 180-0012, Japan, and E-mail: [email protected] (3) National Institute of Information and Communications Technology, 4-2-1, Nukui-Kitamachi, Koganei, Tokyo 184-8795, Japan and E-mail: [email protected] (4) As (3) above, but E-mail: [email protected]
منابع مشابه
A SAR-Probe Calibration System Using A Reference Waveguide Antenna in Tissue-Equivalent Liquid
INTRODUCTION A SAR-probe is usually calibrated using a rectangular waveguide with a matching dielectric spacer below 3 GHz [1, 2]. However, the probe diameter is comparable with the aperture size of the waveguide above 3 GHz, and it can deteriorate the accuracy of the calibration. Therefore, an alternative calibration method using a reference antenna in the phantom liquid has been examined [3]....
متن کاملProbe-Fed Rectangular Dielectric Resonator Antennas,Theoretical Modeling and Experiments
A Rectangular Dielectric Resonator Antenna (RDRA) is theoretically analyzed using the Conventional Dielectric Waveguide Model (CDWM), numerically simulated using the High Frequency Structure Simulator (HFSS) based on the Finite Element Method (FEM) software package and experimentally investigated with the consideration of the fundamental mode TE 111. Antenna parameters under investigation inclu...
متن کاملA New Measurement Principle for Determining the Polarization Direction of Calibration Transponder Antennas
Polarimetric synthetic aperture radar (SAR) systems require verification and calibration of their polarimetric performance after launch. Dual-antenna calibration transponders with freely rotatable, linearly-polarized antennas are one of the most common calibration targets for this task. Because the transponders are used as a measurement standard, any misorientation of the polarization direction...
متن کاملDetermination of Resonance Frequency of Dominant and Higher Order Modes in Thin and Thick Circular Microstrip Patch Antennas with Superstrate by MWM (RESEARCH NOTE)
An accurate model named as the Modified Wolff Model (MWM) is presented as an efficient CAD tool for determination of resonant frequency of the dominant and higher order modes under the multi-layer condition in thin and thick circular microstrip patch antennas. The effects of dielectric cover on the resonant frequency obtained from MWM have been compared against the result of theoretical method ...
متن کاملA Novel SAR-Probe Calibration Method Using a Waveguide Aperture in Tissue-Equivalent Liquid
A novel method for calibrating the probes used in standard measurement systems to evaluate SAR (specific absorption rate) of the radio equipment operating at frequencies over 3 GHz is proposed. As for the proposed method, the electric-field distribution produced by a waveguide aperture installed in a liquid container is used to calibrate the SAR probe. The field distribution is shown to be the ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2005