Optimal Design Of Standard Antenna Array From 1.7GHz To 2.1GHz

With the sustainable development of modern communication technologies,antenna arrays are widely used in civilian and military with the advantages such as high gain,high power,low sidelobes and other characteristics.Antenna measurement has always been an important issue in the field of antenna,and it has been developed in synchrorry with all kinds of new antennas.Faced with a complex antenna measurement system,how to quickly and accurately verify its accuracy has become a practical problem that needs urgent solution.In this thesis,a standard antenna array based on the requirement of metering is designed according to the demand,and it is able to obtain the radiation characteristics through theoretical calculation,so as to determine the effectiveness of antenna measurement system quickly and accurately.The main work and innovations are as follows:(1)The designs of an equal-power divider of 1.0GHz-5.5GHz and a microstrip balun of 1.0GHz-3.0GHz for balanced feed of dipole antennas are proposed which satisfies the design requirements of feed network in multi-element dipole antenna arrays.In addition,to meet the wideband characteristics,a power diver of DC-100GHz is designed.These designs have the characteristics of low cost and easy to integrate,which can be used in large quantities in antenna arrays.(2)Considering the characteristics of computability,a multi-element linear double polarized dipole antenna array is designed.The basic characteristics of the antenna array are verified,and the effect of coupling among antenna elements on cross-isolation of the antenna elements is analyzed systematically.By adjusting the distance between the array elements and using two kinds of antenna elements with the center frequencies of 1.8GHz and 2.0GHz respectively to optimizes the cross-polarization isolation of the antenna elements and extend the bandwidth of the antenna array.(3)A detachable multi-element antenna array is designed by determining the arrangement pattern of antenna array.The detachable multi-element antenna array includes two 1×8 antenna arrays which can work independently or splice into the 1×16 antenna array.A wideband feed network of 1.0GHz-3.0GHz which provides equal-amplitude signal for each antenna elements and balanced feed for each pair of dipole antennas is also proposed to achieve the better performance.