Design of Multi-band Small Antenna Based on Single Split-Ring Resonator

To use the single split-ring resonator(SRR)as a basic unit cell for small antenna with multi-band frequency response is proposed.The structure of antenna is consisted of a single spilt-ring resonator and a coupled microstrip line.The designed antenna is numerically optimized with CST Microwave Studio.The radiation properties of the antenna show that there are three frequency bands among which two bands are 1.3 GHz and 2.1 GHz ultra-wideband(UWB),respectively,where S11 is less than-10 dB.The gain at every fr...     

稳态法测算导热系数的原理

分析了测量导热系数传统模型与相关文献中的修正模型的原理与不足,提出一个较为严密的三维传热学模型,利用MATLAB数值模拟验证了其合理性。推导出计算圆柱型试样导热系数的公式,并得到了适合实际应用的简化公式。以真空橡皮盘为例,定量分析了侧壁散热对导热系数测量值的影响程度,给出了试样规格与测算精度的关系曲线。当试样半径与厚度的比值大于28.9时,侧壁散热的影响将小于5%,故可忽略。     

Miniaturized multi-band antenna using deformed splot ring resonator

A 48mm×60mm×1mm miniaturized multi-band antenna based on deformed split ring resonators was presented.The antenna was consisted of a micro-strip line and a deformed split square ring.Its /S11/parameters were determined through numerical simulation and experimental measurement within three working bands of 2.6GHz to 3.0GHz,3.9GHz to 4.4GHz and 5.2GHz to 5.8GHz and the results showed that the parameters within all the bands were less than-10dB.The gain at every frequency for the antenna was above 2.2dB and it increased monotonously with the frequency from 5.5GHz to 7.0GHz.     

光控微波固体器件研究进展

本文概述了近年来光控微波固体器件方面的研究成果,并论述了其发展趋势。