Design Of Multiband And Ultra-wideband Miniaturization Printed Antenna

With the wide application of modern wireless communication in various fields and the extensive development of information transmission technology.As an important component of wireless communication system,the performance of Antenna is directly related to the quality of system communication.Ultra-wideband printed antenna can meet the needs of modern communication system for wide operating bandwidth and has the advantages of small size and low profile.It can avoid the interference with other equipment of the system by the notch technology and meet the requirements of communication system.This paper focuses on the design of ultra-wideband notch antenna,the specific work is as follows:Firstly,the background and significance of the broadband microstrip printed antenna is described,and the development of the UWB antenna is analyzed.Then the performance parameters of the antenna,the classification and principle of the ultra-wideband antenna,the structure and resonance of SRR and CSRR and other related theories are discussed.Secondly,dual band band-notched UWB monopole antennas are proposed for UWB antennas with band-notched characteristics.The first antenna realizes band-notched in the WLAN and Wi MAX by adding rectangular slot and L-shaped branch.The second antenna achieves band-notched characteristics by loading the U-shaped slot and the floor slot.By analyzing the surface current distribution,the working principle of the resonant structure is studied,and the influence of the parameters on the performance of the antenna is analyzed.The two antennas are designed to cover 2.8GHz~11.8GHz and 3.25GHz~9.8GHz respectively,and achieve good notch-banded characteristics in the WLAN,Wi MAX wave band.The antenna has good omnidirectional characteristic and stable gain in the working band.Finally,a miniaturized UWB monopole antenna is designed for miniaturized UWB antenna.Half-cut technology is used to realize the miniaturization of the antenna,and SRR and etched CSRR structure to realize duel band-notched characteristics.The simulation results show that the working frequency band of the antenna is 3.18GHz~11.4GHz,and band-notched characteristic realized in the band of 3.5GHz and 5.5GHz.The antenna has nice omnidirectional characteristic and stable gain in the working band.