[1] Marcos R P et al 2002 IEEE. Trans. Antennas
Propagat. 50 785

[2] Zhang Y et al 2005 IEEE. Trans. Antennas Propagat.
53 1631

[3] Colak D, Burkholder R J and Newman E H 2000 IEEE.
Antennas and Propagation Society Int. Symp. 4 2124

[4] Zhang M et al 2007 Chin. Phys. Lett. 24 1563

[5] Sha W et al 2006 Chin. Phys. Lett. 23 103

[6] J. T. Johnson 2001 IEEE. Microwave Opt. Technol.
Lett. 30 130

[7] Cui K, Xu X J and Mao S Y 2001 J. Electron. Inform.
Technol. 30 1500

[8] Yu W D, Hua F et al 1998 Chin. Phys. Lett. 15
931

[9] Hasselmann D E 1980 J. Phys. Oceanogr. 10 1264

[10] Michaeli A 1984 IEEE. Trans. Antennas Propagat.
32 252

[11] Ando M et al 1991 IEE. Proc. H 138 289

[12] Obelleiro F et al 1995 IEEE. Trans. Antennas
Propagat. 43 356

[13] Anderson W C 1987 IEEE. Trans. Antennas Propagat.
35 1154

[14] Okino N, KaKazu Y and Morimoto M 1984 IEEE. Comput.
Graph. Appl. 4 79

[15] Arnold-Bos A, Khenchaf A and Martin A 2007 IEEE.
Trans.Geosci. Remote Sensing. 45 3372