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Microstrip antenna has many attractive features , such as small size , light weight , easy processing . However, the main drawback of conventional microstrip antenna such as a narrow bandwidth and low efficiency . This paper focuses on the basis of the detailed study of the antenna show wide bandwidth and increase the gain of the principle and the means of achieving resonance of double curved slot microstrip antenna feed of the L - type probe slotted microstrip antenna , broadband EBG structure and media antenna research and analysis, and on this basis the three wide-band high-gain antenna , and one of the two processing , test results show that these antennas have good bandwidth, gain and pattern . The thesis is divided into five parts . First, the paper describes the meaning and status of a wide-band high -gain antenna , and introduced the use of numerical methods , as well as three-dimensional simulation software . Secondly, proposed a new type of antenna, and this antenna is mainly used to expand the bandwidth of microstrip antennas with an arcuate slit . Then, this antenna is combined with double-layer structure , a broadband high-gain microstrip antenna . Simulation software to optimize the design of an ordinary microstrip antenna used to compare with the antenna . The test results show that : the double antenna design , wide bandwidth and high gain . Then, the paper uses the L-shaped probe fed patch structure and the use of air-filled media patch slotted technology , designed a small area , broadband , high-gain , compact antenna . The test results show that this antenna can achieve a bandwidth of 27.3% ( center frequency of 2.6 GHz ) , the maximum gain of up to 8.4 dB . Paper analyzes then the equivalent circuit of the EBG structure , studied broadening EBG method , a broadband electromagnetic bandgap (EBG) structure , and this structure is used to increase the antenna gain of the dielectric resonators . Simulation results show that this broadband EBG structure of the dielectric resonator antenna gain in the 180MHz band range of more than 8dB, and has a better effect than the literature [ 53] , an annular EBG structure . Finally, the paper summarizes the entire work , research work done in the future prospects .
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