| Wireless communication is one of the most active and rapid development fields in the field of communication.Because of its convenient navigation and positioning technology,satellite navigation technology is widely used in the wireless communication,and it changes the country’s military field and civilian areas.Antenna is a bridge between user terminal and satellite navigation communication,which widely used in wireless communication system,and its rapid development has made great impetus to promote the change of antenna concept and technological innovation.According to the current development trend and application requirements of the antenna,in particular,the application of satellite navigation antenna requirements continue to improve.Single-frequency antenna can only receive the specified single-band signal,in addition to its narrow bandwidth,a single function,which are all limited to its scope of application.With the rapid development of satellite navigation technology,the antenna is facing multi-frequency,miniaturization,integration challenges.The research and development of multi-frequency antenna can meet the widely applications,versatility,bandwidth,integration,practical and other high demand.This paper mainly studies single-feed single-frequency antenna,double-fed dual-frequency antenna,double-fed tri-band combined antenna,double-fed quad-band combined antenna.Double-fed multi-frequency combined antenna can be applied to wireless satellite navigation system,all work independently in the respective frequency band,accept the multi-band signal.The main work and results of the author can be summarized as follows:1.Research on the establishment of LTCC passive components,the principle of the microstrip antenna,antenna basics,a simple single-feed single-frequency antenna with rectangular patch structure is designed.By constantly adjusting the size and the shape of the rectangular patch,the location of the feed point,a 1667MHz and a 1575MHz polarization antenna are finally designed to complete.2.Research on the design method of realize dual-frequency antenna with double coaxial feeds,a dual-fed dual-band polarization antenna is designed,which works in the GPS antenna band(1575MHz)and the Beidou antenna band(1561MHz),and can accept two bands of the signal.Compared to the single-feed single-frequency navigation antenna,the dual-fed dual-band antenna has a wider bandwidth,accepting a wider range of signals,and achieving better performance.3.On the basis of the design of the dual-fed dual-band antenna,the three-feed tri-band combined polarization antenna continues to use the structure of this antenna,which works in the Beidou antenns band(1268MHz,1616MHz,2492MHz),can receive three bands of signal and achieve multi-functional applications.4.Based on the research of the dual-fed dual-band polarization antenna and three-feed tri-band combined polarization antenna,multi-feed quad-band combined polarization antenna is designed,which works at 1268MHz,1575MHz,1616MHz and 2492MHz.The antenna can receive four bands of signal,used in wireless communication systems,achieving multi-functional applications,expanding the scope of the signal,finally to achieve the integration of the antenna structure,to solve the multi-functional antenna,multi-band,integrated application needs. |
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