2012版必威体育精装版网络分析仪测天线s参数应用实例（2012 edition of the latest network analyzer antenna s parameter application examples）.docVIP

2012版必威体育精装版网络分析仪测天线s参数应用实例（2012 edition of the latest network analyzer antenna s parameter application examples） In the microwave detection system, the antenna is usually closed loop point automatic control loop system. Antenna is an important part of a sending / receiving of the control system, its performance will directly affect the detection capacity and detection accuracy of the whole system. In actual use, all kinds of microwave device on the electrical characteristics of the antenna parameters and components (such as high frequency cable) of the scattering parameters, such as antenna, antenna impedance matching characteristics of microwave device, reflection and transmission characteristics parameters have to carry out stringent testing. It is necessary for accurate parameters of antenna and part of microwave device is tested by network analyzer is undoubtedly the best way. Due to limited space, this paper only discusses the application of network analyzer in S antenna parameter test. The design of S antenna parameter testing system The network analyzer is used to describe the various characteristics of active and passive devices, these devices can be a single port, or dual port or ports. The network analyzer can input characteristic measurement of each port and one port to another port transmission characteristics. The network analyzer, whether scalar network analyzer or vector network analyzer, measurement of electric network parameters are dependent on diode detection technique (broadband) or super heterodyne receiver technology (narrowband). Narrowband detection suitable for phase measurement and evaluation of frequency suppression devices such as filters etc.. The characteristics of broadband detection is more suitable for the measurement of frequency converter such as tuner etc., especially those devices with internal local oscillator. Compared with the diode detector, using tunable receiver can provide measurement of high sensitivity and wide dynamic range