Study Of Resultant Field Of Cicular Array Composed By Parabolic Antenna

Nowadays Digital Warfare needs the wireless equipment tremendously, along with the technology's developing. Being the energy transition and eradiating/receiving setting in Wireless Communications procedure, antenna became one of the most important technologies to be studied. Especially after the Second World War, single radiator can not match the request of high gain, high efficiency and high concentrative electromagnetic, but what is in great need. Then, scholars and researchers apply themselves to approach the array antenna to solve the problem.In this thesis, the overall scheme is to establish a Circular Array system which is formed from units of parabolic antenna. Then, the resultant field will be detailed studied, in order to find out a steady-going array antenna system with the best combined efficiency. Based on all the above, after plenty work as investigate and requirement analysis has been done, the paper propose the collectivity system design.While carrying out the scheme, at first, the basic theory of antenna, array antenna and electromagnetic absorption, the performance parameter of antenna and parabolic antenna are deeply researched.In conformity, the characteristic and calculation of aperture field and near-to-far-field transformation for radiation pattern are detailed analyzed. Second, the factors such as, the amount of the antenna elements, mutual coupling between each element, ground and the buildings on earth's surface, which affect the performance of array antennas'resultant field are stressed discussed. At last, do experiment with hardware design and software emulate under the laboratory facilities now we have. The hardware of the system is sum up with the purchased television aerial, Agilent 8482H power sensor, DSP, oscillograph, etc. For the software part, the architecture takes advantage of the mathematical rule of both the antenna's radiation field and electromagnetic field, for example, the Finite-Difference Time-Domain (FDTD) Method.As the result, Circular Array composed by parabolic antenna can satisfies...