Small Size Antenna Designs for GPS/WLAN Applications

• Main Authors: Fong- kun Jiang, 江鳳坤
• Other Authors: 徐文修
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/79652151832403528792

碩士 === 樹德科技大學 === 電腦與通訊系碩士班 === 100 === The study of this paper is design of operating system antenna, There are three kinds of antenna designs to be proposed, first is Low profile microstrip printed IFAs for GPS/WiFi operation in the handset and design of the coupled microstrip antenna for GPS/WLAN(2.4/5.2) operations , the last one is the design of a microstrip antenna to possess inductance multi-band(GPS/WiFi/WLAN) operation , all of three antennas can be covered GPS, WiFi , WLAN band specifications. The first antenna design is printed on a 0.8-mm thick FR4 substrate and will occupy a small area of about 5.6 x 20 mm2 above the no-ground area of the PCB ground, which is soldering by 4 pins on the no-ground area. The antenna radiation metal used IFAs type comprises of two routes of GPS/WiFi. By using these design features, it can easy to cover GPS, WiFi, WLAN bands. The second antenna design approach is an extension on a first antenna theme , The antenna radiation metal comprises two routes of different sizes . the first one has a length of 18 mm, which can support a quarter-wavelength mode at about 5200 MHz for WLAN operation the antenna radiation mode has a length of 18 mm, which can support a quarter-wavelength mode at about 5200 MHz for WLAN operation and then coupling feed to upside the rectangular metal excite two radiation mode .The rectangular metal inserts the L-shape slit to separate into two metal routes, one is for GPS band, and the other is for WLAN operation. The third design is a microstrip antenna to possess inductance. By using the Directly feed and the tuning element, the propose antenna can achieved (GPS, WiFi, WLAN) operation bandwidth.