【英文视频】CST天线仿真04 - 射频干扰

内容简介：

• 什么是干扰

• 信道敏感度(wifi，手机）
  

• 汽车案例

• 耦合矩阵 (S参数，Friss vs 3D全波）

• Interference Task 共址干扰分析 demo

• 结果分析 (违规矩阵图，接收功率或密度，EMI余量）demo

• 利用低通滤波器减少VHF谐波 demo

注：字幕为机译，未经人工专业校对，内容以原音为准。
What we call RF interference is “Degradation in the performance of an RF system due to other electronic or RF systems typically co-located on the same platform”. What is interesting in this definitionis that the interferer is not necessary another RF system. It can be any type of electronic sysbstem, for example one that is actually not intended for wireless for example a data bus. Typically the systems are located on the same platform. It is also important to note that degradation does not mean that the system is completely malfunctioning. What might happen is that the performance of a system drops, for example by decreasing the link speed.

In this video, the platform is a vehicle with two occupants. The car is equipped with GPS satellite navigation,FM broadcast radio and two two-way radio systems in the VHF and UHF businessbands. In addition, the passenger is holding a smartphone which includes aWi-Fi transceiver. These antennas are also mountedin close proximity between each other and for this reason the couplingbetween these antennas can lead to cosite interference effects, degrading theperformance of the systems or disrupting them altogether.

First, the coupling matrix of a possible scenario of antenna placement on car platform has been computed using a full wave simulation performed with the time domain solver. Then, the interference analysis was carried out using the new Interference task feature.

In the interference Task, the RF behavior, the RF systems are defined and the (parasitic) received power at each receiver are obtained. The results of the interference task analysis is the violation matrix that displays an overview of all the systems under investigation and provides information onthe worst case interference and the cause of this type of interference.