Design Of Ku-band Microstrip Array By Software Based On Parallel FDTD

The Finite-Difference Time-Domain (FDTD) method is one of three kinds of electromagnetism field numerical algorithm, it is widely used and becomes very popular for its so many advantages, such as simple, intuitionistic and easily to be grasped. With the development of computer, it has gained great improvement and been used in more field. But its functions are limited by computers'memory and capability. Because the FDTD discrete mesh grid must satisfy the Courant stability condition, the size of the mesh shouldn't be too large. So when you use this method to simulate complex and larger objects, you have to consume huge memory and take too much time, those problems heavily obstruct the wide use of FDTD. FDTD algorithm itself has the advantage in parallel computing, using parallel FDTD algorithm is an effective way to solve this problem.This paper first give out the basic theory of FDTD and parallel FDTD, then describe in detail of basic method of simulating antenna by using GEMS which is based on the parallel FDTD. In this paper,an element of Ku-band antenna array is proposed, and by using this element, 2×2 microstrip antenna array, 4×2 microstrip antenna array and 4×4 microstrip antenna array operating in Ku-band were designed. Through these simulation, the best size of 4×4microstrip antenna array was got,and the impact of some important parameters on the antenna array and antenna element were presented; when the antenna element increases, the gain and pattern of the antenna array changes in trends . Finally, the 4×4 microstrip antenna array operating in Ku-band was fabricated, and the simulation results and actual test results were compared.