Dissertation > Excellent graduate degree dissertation topics show

Design of Ka -band phase shift LiZn ferrite

Author: ZhuangYaMing
Tutor: YuZhong
School: University of Electronic Science and Technology
Course: Electronic Science and Technology
Keywords: Ferrite phase shifter LiZn ferrite Phase shifter driver circuit HFSS simulation
CLC: TM277
Type: Master's thesis
Year: 2011
Downloads: 82
Quote: 1
Read: Download Dissertation

Abstract


Phase shifter is a kind of microwave control device. Its main function is to control the phase of the microwave signal so that the phase can meet the need of the system. Microwave ferrite phase shifters have dominated position due to high power capacity, low insertion loss, high reliability and long service life.Based on the LiZn ferrite with high saturation magnetization, low coercive force, low loss and high rectangular, we have designed and simulated the LiZn ferrite phase shifter. The research contents and conclusion are listed as follows:1. The effects of iron-deficient composition, addition of SnO2 and ZrO2 on the electromagnetic properties of LiZn ferrite have been investigated. Iron deficiency and adding ZrO2 can increase the resistivity of LiZn ferrite significantly. The addition of SnO2 could promote grain growth; improve the saturation magnetization and reduce the coercivity of LiZn ferrite.2. Impedance matching was simulated by Ansoft HFSS software, and the results showed that the steps shaped impedance matching can effectively reduce the VSWR.3. A 4-bit ferrite phase shifter which works in frequency bandwidth of 32-34GHz has been simulated. The results showed that when the remanent magnetization is 3700Gs, the phase shift is 0-380°, and the insertion loss and VSWR basically met the requirement.4. By researching the relationship between the remanent magnetization and phase shift, we found that the amount of phase shift is proportional to the remanent magnetization.5. By designing a universal driving circuit controlled by MCS-51 which is easy to operate and flexible to apply, the driving current of the driver can be controlled flexibly.

Related Dissertations

  1. Low H_cLiZn dielectric properties of ferrite,TM277
  2. Nanophase Spinel-type Ferrite for Microwave Absorption: Preparation and Microwave Absorption Properties Research,TB383.1
  3. Structure Simulation and Technology of BST Ferroelectric Films Phase Shifter,TN623
  4. Research on Desigh and Fabrication of MEMS Probe Card,TN407
  5. The Design and Research of Microstrip Patch Antenna and Power Amplifier Based on Wireless Data Communication System,TN822.4
  6. Optimal Design Research on Microwave Oven Used for Making the Caramel Pigment Based on the HFSS Simulation Technology,TM925.5
  7. Study on the Microfabrication Technology and Characteristics of RF MEMS Microinductors Microcapacitors,TM55
  8. Study of Ba1-xSrxTiO3-based Ferroelectric Film Materials and Simulation for Film Phase Shifter in Structure and Performance,TB383.2
  9. Research on the Antennas of Wireless Personal Area Network,TN828.6
  10. Four coaxial connectors characteristic impedance calculation and simulation modeling,TM503.5
  11. Study on Printed Inverted-F Antenna of Remote Control System for Pruning Machine,S776
  12. The Study of Ultra-Wideband Antennas That Based on Wide Slot Structure,TN822
  13. Microwave Power Film Resistors TaN Preparation and Properties of,TM544
  14. Ferrite Electromagnetic Properties of LiZn,TM277
  15. The Research of Improved Particle Swarm Optimization Algorithm and Its Application in the Antenna Design,TN820
  16. Lithium ferrite shift in the phase detector in the microwave,TN623
  17. Reggia-Spencer phase shifter Used lithium ferrite materials research,TM277
  18. New broadband multi-port circulator modeling, simulation and trial research,TN621
  19. The Research of L-Band DAB Broadcasting Antenna and Feeding Network,TN919.72
  20. Ferrite phase feed integrated network of electronic control,TN958.92

CLC: > Industrial Technology > Electrotechnical > Electrical materials > Magnetic materials,ferrite > Ferrite,oxide magnetic materials
© 2012 www.DissertationTopic.Net  Mobile