Dissertation > Excellent graduate degree dissertation topics show

Research of Circular Polarization Antennas in Satellite Navigation Position Systems

Author: ZhangMin
Tutor: YinYingZeng
School: Xi'an University of Electronic Science and Technology
Course: Electromagnetic Field and Microwave Technology
Keywords: Navigation Circularly polarized Wide lobe Microstrip antenna Cross dipole
CLC: TN967.1
Type: Master's thesis
Year: 2011
Downloads: 176
Quote: 1
Read: Download Dissertation

Abstract


With the development of satellite navigation and positioning technology, expanding the scope of the navigation application, one of the three world's fastest growing information industry. Antenna as a key component in the navigation and positioning system, a direct impact on the performance of the entire system. Therefore, the antenna used in satellite navigation and positioning system is very necessary. In this context, this paper studied the circularly polarized antenna, microstrip antenna dual-band technology and broadening lobe. A dual-band circularly polarized microstrip antenna design. The antenna using a a double overlap coaxial structure in the L-band and S-band, dual-band work; choice Wilkinson power divider to achieve the dual point feed to ensure that the antenna has a good circular polarization performance. Through theoretical analysis and simulation, production antenna prototype and physical test. The results show that within the entire frequency band, the antenna direction of maximum radiation axis ratio less than 2dB 3dB Beamwidth; the L-band and S-band, respectively, 97o and 90o, 10o angle of elevation greater than-3dB gain, to meet the design. indicators requirements, to achieve the purpose, and of the practical application of a small batch. Order broadening the 3dB beamwidth of the antenna, the paper developed a load 3D frustum-shaped floor structure of the dual-band circularly polarized microstrip antenna. The antenna lobe width and a low elevation angle performance can be improved by adjusting the frustum-shaped floor structure. Simulation results show that when the round table form the floor of the upper base radius to 37mm, the lower end of the radius of 60mm and height of 30mm, the antenna in the L-band and S-band of 3dB wave lobe width, respectively, can reach 116o and 108o, 10o angle of elevation gain are large -2dB, and with the elevation angle of 90o gain difference is less than 6.5dB and 6dB, respectively, the radiation beam of the antenna is more evenly. In order to further broadening antenna 3dB beamwidth, wide lobe dual-band vehicle antenna. The antenna using three-dimensional circular desk-shaped floor structure to show wide its L-band of the lobe width, S-band wave lobe width Exhibition wide by add a metal stents in the upper medium plate, increasing the radiation patch and the floor of the pitch to achieve the Optimize the design of antenna 3dB beamwidth in the L-band and S-band to reach 156o and 127o 10o angle of elevation gain than-2dB, and less than 5dB and 4 dB, respectively, with the difference between the 90o angle of elevation gain antenna radiation beam more uniform. S-band in order to improve the dual-band vehicle antenna beamwidth, crossed dipole antenna. By adjusting the four transducer arm lower inclined angle so that the lobe of the antenna S band width can be broadened, the low elevation gain becomes larger. The numerical results show that the beamwidth antenna L-band and S-band can reach 152o and 103o, 10o angle of elevation gain than-0.5dB, and less than 3dB and 3.5dB, respectively, with the difference between the 90o angle of elevation gain. The antenna has a good uniform radiation characteristics.

Related Dissertations

  1. Endgame Guidance Law Design and Analysis of Deep Space Impact Exploration,V448.2
  2. The Research of Navigation Multi-Sensor Data Fusion Technology Based on Micro Unmanned Platform,V249.32
  3. Algorithm Research on SINS/GPS Integrated Navigation Syste,V249.328
  4. Polarized-Light/Geomagnetism/GPS/SINS Integrated Navigation Algorithm,V249.328
  5. Research on Navigation System Related Technology for Moving Objects under Dynamic Environment,TP301.6
  6. The Relation between Fuzzy Logic Guidance Law and Homing Quality,TJ765
  7. Research on the Discipline Navigation Based on the Investigation and Analysis of User’s Demand in Universities of China,G252.6
  8. Research on CP Mircrostripantenna with Wide Beamwidth Andarrayantenna for GPS Band Application,TN822
  9. The Research of Mobile Machine Vision Navigation and Obstacle Avoidance System,TP242
  10. Optical Flow Aided Navigation Inspired by Honeybee Vision,TP391.41
  11. Robot Localization in Fusion with Vision and Inertial Navigation,TP242
  12. Design of a Ka-Band Meander-Line Circular Polarizer,TN820.81
  13. Design of Inertial Navigation System Attitude Information Correction,TN966
  14. Research and Design on Planar of Reconfigurable Antenna,TN820
  15. AUV Integrated Navigation Algorithm Study and System Implementation,U666.1
  16. NVD HD Video Editing System Design and Implementation,TP391.41
  17. Satellite Formation Satellite Relative Measurement Technology,V448.2
  18. Mining distributed dynamic traffic information and navigation,TP311.13
  19. High dynamic SINS navigation solution algorithm and parallelization of,TN966
  20. Real-time medical ultrasound puncture navigation positioning and soft tissue modeling,R318.6
  21. RFID antenna research and design,TN820

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radio navigation > Navigation systems of the various institutional > Satellite navigation system
© 2012 www.DissertationTopic.Net  Mobile