Dissertation > Excellent graduate degree dissertation topics show

Design of Dual-frequency Dual-polarized Base-station Antennas for Mobile Communications

Author: JiangChun
Tutor: JiaoYongChang
School: Xi'an University of Electronic Science and Technology
Course: Electromagnetic Field and Microwave Technology
Keywords: Dual-band dual-polarized Base station antenna Beamforming Genetic Algorithms
CLC: TN828.6
Type: Master's thesis
Year: 2011
Downloads: 224
Quote: 0
Read: Download Dissertation

Abstract


The antenna is the key to one of the hardware devices of the mobile communication system. With the rapid development of mobile communications, increasing the complexity of the system, the escalating communication system hope that an effective solution to multipath fading problems, to reduce the number of antennas, reduce the cost of the antenna and location, while the dual-band dual-polarized base station antenna able to meet these requirements. Study dual-band dual-polarized base station antenna is necessary, and has a theoretical significance and practical value. Thesis, the tiled and coaxial two different implementations of dual-band dual-polarized base station antenna. A comparative study of band designed dual-band dual-polarized base station antenna VSWR, isolation, radiation pattern, etc., through different programs. The papers summarized as the following aspects: 1, design different the bipolaron high isolation wideband base station antenna unit. Dual-band dual-polarized base station antenna at the same time work in CDMA/GSM900 band (824MHz-960MHz) and DCS1800/3G band (1710MHz-2170MHz). Side-by-side dual-band dual-polarized base station antenna, the paper designed two kinds of oscillators: die-casting mold dipole and printed dipole, each oscillator including two units of work in different frequency bands. Coaxial programs designed combination of a dual-band characteristics oscillator, DCS1800/3G band L-shaped probe coupled feed cross printed dipole, low band uses the double ring of the T-probe coupled feed shaped metal sheets as the radiating element, the two mutually nested, and have the same phase centers. In addition, an L-shaped probe fed dual-band circular patch oscillator simulation. 2, depending on the program, the design of a dual-band dual-polarized antenna array. First, determine the spacing of the antenna unit, to select the appropriate shape and size of the antenna reflector plate. Programs side-by-side, the spacing between the columns of the array of different bands on the array pattern analysis to find out the optimal size of the spacing. The coaxial dual-band dual-polarized antenna array, the analysis of the coupling of the antenna. Antenna processing and testing of two scenarios, compare different programs under the dual-band dual-polarized base station antenna array VSWR, isolation, radiation pattern and other characteristics, and to analyze the pros and cons of the base station antenna performance in two ways sex. 3, the direction of the base station antenna pattern beam consolidated imprinting method. Needs in the practical application of the base station antenna array pattern shaped design using genetic algorithms optimized vertical plane pattern of the antenna on the side lobe, the first under the zero angle of the main lobe. Array elements are ignored for the traditional array mutual coupling lead to inaccurate optimization results, the extracted simulation software to consider unit mutual coupling and array environment of the unit after the unit impact pattern included in the optimization process, improve the calculation results accuracy.

Related Dissertations

  1. Research on Smart Antenna Technology Application in WiMAX System,TN821.91
  2. The Technology Research on Channel Coding and Channel Estimation in MC-CDMA Systems,TN929.533
  3. Development of the on-line Training and Examination System of Army,TP311.52
  4. Designs and Applications of Fuzzy Synthetic Evaluation Models Based on Parallel Algorithms,TP18
  5. Based on Genetic Algorithm Pishihang irrigation canal water allocation marshalling model of,S274
  6. Genetic Algorithm in logistics and warehousing Optimization Research,F259.2
  7. Mining resources based on genetic algorithm optimization model of,O224
  8. The Research and Application of Modified Algorithms About Fuzzy Predictive Functional Control,TP273
  9. Optimal Control of Emulsion System in Cold Rolling,TP273
  10. Research on the Marshalling-scheduling Model and Algorithms of Freight Trains Based on Game Theory,O225
  11. Multi-directional Mutation Genetic Algorithm and Research on Neural Network Optimization,TP18
  12. The Application of Using Genetic Algorithms on Universities Course-arranging System,TP18
  13. Research on Mobile Robot Path Planning and Simulation Realization,TP242
  14. Research on Chinese Speech Processing and Speech Enhancement in Hearing Aids,TN912.3
  15. Research on Routing Algorithmin Sensor Networks Based on Cluster with Mobile Sink,TP212.9
  16. Desgin and Investigate of Multi-standard Base Station Antenna,TN828.6
  17. Research and Implement of the Theme Crawler for Automotive Industry,TP391.3
  18. The Research and Implement on Camera Calibration Technology Based on Trifocal Tensor,TP391.41
  19. Decision Support System of Vehicle Scheduling in Double Level Garage,TP242
  20. The Studies on Some Improvements of the GA and Their Applications in SVM,TP18
  21. A Reduction Method for Artificial Neural Network Inputs Based on An Improved Genetic Algorithm,TP18

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radio equipment,telecommunications equipment > Antenna > Antenna: zoning > Mobile communications antenna
© 2012 www.DissertationTopic.Net  Mobile