天津商学院学报
天津商學院學報
천진상학원학보
Journal of Tianjin University of Commerce
2006年
3期
46~48
,共null页
金涛斌 丁荣林 辛文莉
金濤斌 丁榮林 辛文莉
금도빈 정영림 신문리
缺陷接地结构 周期性缺陷接地结构 FDTD法 周期单元数 传输特性
缺陷接地結構 週期性缺陷接地結構 FDTD法 週期單元數 傳輸特性
결함접지결구 주기성결함접지결구 FDTD법 주기단원수 전수특성
defected ground structures(DGS) ; periodic defected ground structures (PDGS) ; finite-difference time-domain (FDTD) method; periodic unit amounts; transmission properties
周期性缺陷接地结构(PDGS)是在微波电路的接地金属平面上,人为地蚀刻出周期性的“缺陷”结构,以改变接地电流的分布,从而改变传输线的频率特性。本文针对PDGS结构的传输特性进行了时域有限差分(FDTD)数值分析,绘制了它们精确的传输特性曲线,得出了PDGS结构的周期单元数与其传输特性之间的变化规律。通过分析知:当周期单元数较大时,PDGS结构具有良好的阻带特性;当周期单元数变小时,阻带宽度变窄、阻带深度变浅。
週期性缺陷接地結構(PDGS)是在微波電路的接地金屬平麵上,人為地蝕刻齣週期性的“缺陷”結構,以改變接地電流的分佈,從而改變傳輸線的頻率特性。本文針對PDGS結構的傳輸特性進行瞭時域有限差分(FDTD)數值分析,繪製瞭它們精確的傳輸特性麯線,得齣瞭PDGS結構的週期單元數與其傳輸特性之間的變化規律。通過分析知:噹週期單元數較大時,PDGS結構具有良好的阻帶特性;噹週期單元數變小時,阻帶寬度變窄、阻帶深度變淺。
주기성결함접지결구(PDGS)시재미파전로적접지금속평면상,인위지식각출주기성적“결함”결구,이개변접지전류적분포,종이개변전수선적빈솔특성。본문침대PDGS결구적전수특성진행료시역유한차분(FDTD)수치분석,회제료타문정학적전수특성곡선,득출료PDGS결구적주기단원수여기전수특성지간적변화규률。통과분석지:당주기단원수교대시,PDGS결구구유량호적조대특성;당주기단원수변소시,조대관도변착、조대심도변천。
The periodic defected ground structures (PDGS) are the structures that are etched periodically on its ground plane. PDGS can be used to prohibit the propagation of electromagnetic waves within a certain band of frequencies. In this paper, the precise parameters of transmission properties of PDGS are obtained on the basis of FDTD(finite-difference timedomain method)analysis. PDGS has good stop-band when periodic unit amounts are biggish, and the deepness and width of stop-band will decrease with the decrease of periodic unit amounts. The relation between periodic unit amounts and transmission properties of PDGS given in the paper will provide powerful tool for the analysis and design of PDGS.