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Investigation and Design of Microstrip Antennas for Wireless Communication

Author: XuJie
Tutor: ShenDongZuo
School: Yunnan University
Course: Communication and Information System
Keywords: Microstrip antenna Miniaturization Broadband Mobile
CLC: TN822
Type: Master's thesis
Year: 2010
Downloads: 116
Quote: 3
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Abstract


The rapid development of wireless communication technology , to promote the related electronic technology continues to progress. Antenna wireless communication system for any parts necessary for the performance of the communication system plays an important role in the decision . Microstrip patch antenna has a low profile , light weight and ease of integration with the advantages of a microwave circuit , which in practice has been widely used. However, there are narrow band microstrip antenna itself , the gain is low, low efficiency , greatly limiting its scope of application. Through the tireless efforts of many researchers , the relative bandwidth of microstrip antenna has been extended from the original 7% to 60 % -70 % relative bandwidth of many UWB antennas can already exceed 100%. Based on the number of reference and summarized , mainly for the work in the GSM900, DCS, PCS and UMTS band antennas have been studied by simulation software HFSS and CST (3) designed to operate in the frequency band of the new microstrip antenna . The main paper as follows: 1 . Studied to achieve miniaturization technology microstrip antenna ( 1, using short circuit plate and the ground plate ; 2 , optimizing the structure of the antenna ; 3 , the use of high dielectric constant load ) , and used by a wide bandwidth the method of ( 1, increase the thickness of the medium ; 2 , the ground plane of the patch or slot ; 3, using the three-dimensional structure ) . (2) design work in GSM900/1800 dual band antenna. The antenna consists of two operating at 900MHz and 1800MHz antenna units , a simple T- junction feed . Two antenna elements can be adjusted independently , thus simplifying the design process. 3 design work in the DCS / PCS / UMTS band broadband antenna. The H-shaped aperture-coupled antenna is fed shorted patch antenna structure . Patch antenna width, length and height are 40mm, 23.5mm and 10mm. The antenna can be a good cover from 1700MHz to 2200MHz frequency band width , suitable for DCS, PCS and UMTS band applications . 4 design work in the 0.7GHz to 10GHz band broadband antenna. The patch antenna using fork and L- shaped ground floor . Increases the vertical ground plane , the feed point of the patch using the gradient mode, and the patch to open a rectangular groove , in order to achieve broadband characteristics . The antenna can operate from 0.7GHz to 10GHz (VSWR lt; 2), covering a number of commonly used frequency bands , such as : GSM900, DCS, PCS, UMTS and WLAN.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radio equipment,telecommunications equipment > Antenna > Antenna: the band and the wave mode of transmission points
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