CAJ | 학술논문

采用数值模拟和理论分析方法,研究了圆波导内置 n-Si 探测结构对 X波段几种常用电磁波模式的电场响应。首先基于强电场下的热载流子效应,设计了一种利用 n-Si 进行高功率脉冲实时测量的圆波导探测结构。接着采用三维并行电磁场时域有限差分方法,模拟研究并分析了 TE11(两种极化方向)、TM01和TE01模式作用下圆波导探测结构内的横向电场分布特点。结果表明：不同模式下探测芯片内的横向电场均以径向电场为主,径向和角向电场幅度比约为10,而芯片在圆波导内引入的横向电场驻波比均不大于1.3。最后推导了圆波导探测结构在不同模式电场作用下的灵敏度表达式,理论分析指出了探测结构的最大承受功率与圆波导模式有关,最高可达422 MW,响应时间则均为 ps 量级,初步证实了该探测结构可用于 X 波段百 MW级脉冲波源在线探测的可行性。
채용수치모의화이론분석방법,연구료원파도내치 n-Si 탐측결구대 X파단궤충상용전자파모식적전장향응。수선기우강전장하적열재류자효응,설계료일충이용 n-Si 진행고공솔맥충실시측량적원파도탐측결구。접착채용삼유병행전자장시역유한차분방법,모의연구병분석료 TE11(량충겁화방향)、TM01화TE01모식작용하원파도탐측결구내적횡향전장분포특점。결과표명：불동모식하탐측심편내적횡향전장균이경향전장위주,경향화각향전장폭도비약위10,이심편재원파도내인입적횡향전장주파비균불대우1.3。최후추도료원파도탐측결구재불동모식전장작용하적령민도표체식,이론분석지출료탐측결구적최대승수공솔여원파도모식유관,최고가체422 MW,향응시간칙균위 ps 량급,초보증실료해탐측결구가용우 X 파단백 MW급맥충파원재선탐측적가행성。
Electric field response of silicon detecting chip within circular waveguide to several usual electromagnetic wave modes in X-band is studied numerically and theoretically.Based on the hot carrier effect under high electric field,a silicon detec-ting structure is proposed to measure the high power microwave (HPM)pulse within circular waveguide in real time.Then cross-sectional electric field distributions are simulated and analyzed when HPMs with TE11 mode (with two orthogonal polarization di-rections),TM01 mode and TE01 mode are applied respectively by using the three dimensional parallel finite-difference time-domain (FDTD)method.Results of different modes show that the transverse electric fields are all dominated by radial components,and the amplitude ratios between radial and angular components are probably 10.The standing wave ratio of transverse electric field is no more than 1.3.At last,the sensitivities of the detecting structure for different modes in circular waveguide are derived. Therotical analysis indicates that the maximum enduring power of the detecting structure,which can reach as high as 422 MW,is dependent upon modes,and its response time is in the picosecond-level.It attests the feasibility of on-line measurements of X-band HPM pulses employing the designed detecting structure.