Design Of Miniaturized Microstrip Antenna And Radar Detection System

Based on the real time,all day and precise of the radar to identify and detect a variety of target.It is making the radar has applications in the military field.Therefore,a radar system of detection is designed in this paper.The purpose of the system is to detect suspicious target,such as tanks,artillery,and terrorists of holding guns when these enter military-managed areas.The front-end transmitter of the system emits a signal of electromagnetic wave which is covered of the whole area.When the target of suspicious enter into the area military management,the signal of the transmission encounter the abstraction of target which is moving,the signal is reflected and received by the antenna.Then when the signal is processed of the circuit,the detection is completed.The main work of in this paper is including the following parts:?1?.Based on reading a large number of literatures about radar and the design of antenna at home and abroad,the background of research and present situation of radar and antenna in recent of years are briefly introduced,meanwhile the method of miniaturization in antenna is analyzed and summarized.?2?.The system of the overall program is determine.The system is made by the circuit of oscillation,circuit of signal coupling,the antenna of the emission and reception,circuit of mixer,filter circuit,module of and components of software.?3?The antenna is modeled by the software of HFSS and microstrip antenna of miniaturization that the frequency of working is f= 9GHz is designed.In this paper,the method of miniaturization of the antenna is analyzesd,the material of TP-1/2 which consists of copper foil of microwave composite dielectric and the method of radiation patch slotting is used to miniaturization of antenna.The impedance matching implant 1/4 converters of matching,at the same time the frequency of choose is detailed of the antenna,what's more,the software of HFSS is used to simulation and optimization of the antenna and the product of antenna is made and tested.The size of the final antenna unit of miniaturized is 16 mm10 mm,and with the antenna unit the size of the array of the antenna is 40mm×40 mm.The results of simulation show that the return loss of the antenna is|S₁₁|=35d B,the VSWR is less than 1.5 which close to 1,the antenna bandwidth is 5.4%.By analyzer of vector network the return loss of antenna is |S₁₁|=30.992 dB,and the error of the antenna was analyzed.?4?In this paper the power of buck module?filter circuit and Data of processing and module of filtering is designed.?5?The platform of the whole system is built and the tested.In this paper,two experiments of system test and distance test are designed.Whether the test of system is working properly,it is up to the LED of red to verify the working of the system.The test of distance is used to check the distance that the system can detect.The results of test show that the system can work,and the distance of detection can reach 22 meters.The indicators of design are met.