Hybrid FDTD-PWS method for focal field analysis of lens antenna at millimeter-wave band
Zhang Yan1, Lü Shanwei1, Miao Jungang1, Li Yuying2*
1. School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;
2. Institute No. 25 of the Second Academy, Chinese Aerospace Science and Industry Corporation, Beijing 100854, China
ժҪ ���һ���µĽ�ʡ����ռ��FDTD-PWS����㷨,��Ӧ���������ߵĽ��泡����.���Ȳ���FDTD(Finite-Difference Time-Domain)���õ��۽������ߵĿ��泡�ķ��Ⱥ���λ�ֲ�,��ͨ��PWS(Plane Wave Spectrum)��������ƽ��,���ó����泡�ֲ�.�������߳��ֲ��ĶԳ���,��PEC(Perfect Electric Conductor)��PMC(Perfect Magnetic Conductor)�߽�Ӧ����FDTD�ķ������,ʹ����ģ������Ϊԭģ�͵�1/4,��һ����ʡ�˼���ռ�.Ӧ���ں��ײ��۽������ߵĽ��泡�������,�����佹�泡����ƽ�����ɨ�����,������������̽ͷ��������ʵ���������Ƚ�,֤���÷����Ǿ�ȷ��Ч��.
A novel hybrid finite-difference time-domain (FDTD) method and plane wave spectrum (PWS) method was presented for analysis focal field distribution of lens antenna. Firstly, the amplitude and phase distribution in the aperture was simulated by the FDTD method. Moreover, the antenna model was reduced to 1/4 by the pertect electric conductor (PEC) and perfect magnetic conductor (PMC) boundary conditions. And secondly PWS method was applied to calculate the focal field distribution. In order to demonstrate the accuracy and efficiency of this new method, a lens antenna at millimeter-wave band was designed and simulated as an example. Then this lens antenna was measured by the planar-near-fields (PNF) method. Finally, the influence of the measurement probe was characterized also by the FDTD method and taken into account by the calibration. And it is found that the results of focal spot size obtained by the FDTD-PWS method are in good agreement with the experiment data by the probe compensation.
Zhang Yan, L�� Shanwei, Miao Jungang, Li Yuying.Hybrid FDTD-PWS method for focal field analysis of lens antenna at millimeter-wave band[J] JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2007,V33(06): 682-685
Kraus ��J D, Marhefka R J. ����(��)[M]. ������. ����ѫ��.����:���ӹ�ҵ������, 2005:140-147 Kraus J D, Marhefka R J. Antennas[M]. 3rd Edition. Translated by Zhang Wenxun. Beijing:Publishing House of Electronics Industry, 2005:140-147 (in Chinese)
��ı�. ���ײ��������뼼��[M]. �ڶ���. ����:�ߵȽ���������, 2006:173-193 Dou Wenbin. Millimeter wave quasioptical theory and techniques[M]. 2nd Edition. Beijing:Higher Education Press, 2006:173-193 (in Chinese)
Godi G, Sauleau R, Thouroude D. Performance of reduced size substrate lens antennas for millimeter-wave communications[J].IEEE Transactions on Antennas and Propagation.2005, 53(4):1278-1286
���E V. �ھ���������������[M]. ���Ľ���. �ɶ�:�ɶ���Ѷ����ѧԺ������, 1987:16-20 Jull E V. Aperture antennas and diffraction theory[M]. Translated by Qiu Wenjie. Chengdu:Chengdu Telecommunication Engineering College Press, 1987:16-20 (in Chinese)
Shi Jin, Cracraft M A, Slattery K P, et al. Calibration and compensation of near-field scan measurements[J].IEEE Transactions on Electromagnetic Compatibility.2005, 47(8):642-650