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�������պ����ѧѧ�� 2009, Vol. 35 Issue (11) :1311-1314    DOI:
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Optimal design of broadband matching network for electrically small antennas
Chen Aixin, Zhang Yanjun, Jiang Tiehua, Su Donglin*
School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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Abstract�� A novel network topology for electrically small antennas was presented and verified successfully. An optimal design approach which combines the real frequency method and the direct numerical optimization was used to design the broadband matching network. According to the characteristic of an electrically small antenna, a network topology which can improve the efficiency of the electrically small antenna observably was designed with two methods of full-band and piecewise-band frequency matching, and the design result was computed and validated with simulation software. Finally, the two methods were compared. Results show that the voltage standing wave ratio of the antenna is below 2.5 and its efficiency is above 30% in 100~180��MHz by the optimal design. The proposed network topology is especially useful in the matching of electrically small antennas and allows a good prospect of application on the designing of broadband matching networks for electrically small antennas.
Keywords�� broadband networks   loading   efficiency     
Received 2008-10-27;
Fund:

������Ȼ��ѧ����������Ŀ(60831001,F010610)

About author: �°���(1970-),��,�ӱ�������,������,axchen@buaa.edu.cn.
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�°���, ���޾�, ������, �ն���.��С���߿��ƥ��������Ż����[J]  �������պ����ѧѧ��, 2009,V35(11): 1311-1314
Chen Aixin, Zhang Yanjun, Jiang Tiehua, Su Donglin.Optimal design of broadband matching network for electrically small antennas[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2009,V35(11): 1311-1314
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