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�������պ����ѧѧ�� 2007, Vol. 33 Issue (06) :682-685    DOI:
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����1, ����ΰ1, �翡��1, ����Ө2*
1. �������պ����ѧ ������Ϣ����ѧԺ, ���� 100083;
2. �й�����ƹ����Ź�˾ ��Ժ��ʮ����, ���� 100854
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

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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��.
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�ؼ����� FDTD   PWS   FDTD-PWS����㷨   ���泡   ͸������     
Abstract�� 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.
Keywords�� FDTD   PWS   FDTD-PWS hybrid method   focal field   lens antenna     
Received 2006-07-18;


About author: �� ��(1980-), ��, ������, ��ʿ��, zhangyan_buaa@yahoo.com.cn.
����, ����ΰ, �翡��, ����Ө.FDTD-PWS�����ڷ������ײ�͸�����߽��泡[J]  �������պ����ѧѧ��, 2007,V33(06): 682-685
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
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