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Taking theories and stimulation as the starting points, this paper gives the optimal design for dichroic plate in the advanced technology of imaging diagnostic. Dichroic plate is firstly analyzed theoretically, whose result shows that it is a wavelength-sensitive device, different from the traditional understanding of dichroic plate. In fact, a dichroic plate is a wavelength selective, and its outward manifestation is a frequency selective plate. There are two ways of putting medium into the dichroic plate. It can be seen that with the increase of the medium's semidiameter, the passband bandwidth increases obviously and the rising slope is sharper. When the medium is fully populated, the passband bandwidth reaches its maximum, the freguency increasing upto 12 GHz, and in the meanwhile the rising slope possessing the top speed. The other is to adopt the method of coating. If a hollow dielectric cylinder is filled to become a waveguide, it can also be seen that with the thickening of the wall of the dielectric cylinder, the passband bandwidth also increases obviously and the rising slope is sharper. When the medium is fully filled in the circular waveguide, the result is the same as that of the first method.
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Keywords:
- microwave imaging diagnostic /
- Gaussian beam /
- spatial filtering /
- dichroic plate
[1] Hartfuss H J, Geist T, Hirsch M 1997 Plasma Phys. Control. Fusion 39 1693
[2] Cima G, Bravenec R V, Wootton A J, Rempel T D, Gandy R F, Watts C, Kwon M 1995 Phys. Plasmas 2 720
[3] Mase A, Kogi Y, Ohashi M, Ohsako S, Nagayama Y, Kawahata K, Aoi S, Sakata E 2003 Rev. Sci. Instrum. 74 1445
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[5] Park H, Mazzucato E, Munsat T, Domier C W, Johnson M, Luhmann Jr N C, Wang J, Xia Z, Classen I G J, Donné A J H, van de Pol M J 2004 Rev. Sci. Instrum. 75 3787
[6] Austin M E, Lohr J 2003 Rev. Sci. Instrum. 74 1457
[7] Hsia R P, Deng B H, Geck W R, Liang C, Domier C W, Luhmann Jr N C, Brower D L, Cima G 1997 Rev. Sci. Instrum. 68 488
[8] Gao B X 2013 Ph. D. Dissertation (Hefei: University of Science and Technology of China) (in Chinese) [高炳西 2013 博士学位论文(合肥: 中国科学技术大学)]
[9] Q J J 2012 M.S. Dissertation (Hefei: University of Science and Technology of China) (in Chinese) [秦津津 2012 硕士学位论文 (合肥: 中国科学技术大学)]
[10] Deng B H, Hsia R P, Domier C W, Burns S R, Hillyer T R, Luhmann Jr N C, Oyevaar T, Donné A J H RTP team 1999 Rev. Sci. Instrum. 70 998
[11] Munsat T, Domier C W, Kong X Y, Liang T R, Luhmann Jr N C, Tobias B J, Lee W C, Park H K, Yun G S, Classen I G J, Donné A J H
[12] Munk B A (translated by Hou X Y) 2009 Frequency Selective Surface Theory and Design (Beijing: Science Press) (in Chinese) [Munk B A 著(侯新宇 译) 2009 频率选择表面理论与设计(北京: 科学出版社)]
[13] Winnewisser C, Lewen F, Helm H
[14] Ebbesen T W, Lezec H J, Ghaemi H F, Thio T, Wolff P A 1998 Nature 391 667
[15] Chen C C 1973 Transmission of Microwave Through Perforated Flat Plates of Finite Thickness IEEE pp1-6
[16] Pickett H M, Farhoomand J, Chiou A E 1984 Appl. Opt. 23 4228
[17] Wang X Z, Gao J S, Xu N X 2013 Acta Phys. Sin. 62 167307 (in Chinese) [王秀芝, 高劲松, 徐念喜 2013 62 167307]
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[1] Hartfuss H J, Geist T, Hirsch M 1997 Plasma Phys. Control. Fusion 39 1693
[2] Cima G, Bravenec R V, Wootton A J, Rempel T D, Gandy R F, Watts C, Kwon M 1995 Phys. Plasmas 2 720
[3] Mase A, Kogi Y, Ohashi M, Ohsako S, Nagayama Y, Kawahata K, Aoi S, Sakata E 2003 Rev. Sci. Instrum. 74 1445
[4] Oyama N, Mase A, Negishi H, Tokuzawa T, Itakura A, Tamano T, Yatsu K, Watabe K, Mizuno K, Nagayama Y, Kawahata K, Matsuura H, Miura A 1997 Rev. Sci. Instrum. 68 500
[5] Park H, Mazzucato E, Munsat T, Domier C W, Johnson M, Luhmann Jr N C, Wang J, Xia Z, Classen I G J, Donné A J H, van de Pol M J 2004 Rev. Sci. Instrum. 75 3787
[6] Austin M E, Lohr J 2003 Rev. Sci. Instrum. 74 1457
[7] Hsia R P, Deng B H, Geck W R, Liang C, Domier C W, Luhmann Jr N C, Brower D L, Cima G 1997 Rev. Sci. Instrum. 68 488
[8] Gao B X 2013 Ph. D. Dissertation (Hefei: University of Science and Technology of China) (in Chinese) [高炳西 2013 博士学位论文(合肥: 中国科学技术大学)]
[9] Q J J 2012 M.S. Dissertation (Hefei: University of Science and Technology of China) (in Chinese) [秦津津 2012 硕士学位论文 (合肥: 中国科学技术大学)]
[10] Deng B H, Hsia R P, Domier C W, Burns S R, Hillyer T R, Luhmann Jr N C, Oyevaar T, Donné A J H RTP team 1999 Rev. Sci. Instrum. 70 998
[11] Munsat T, Domier C W, Kong X Y, Liang T R, Luhmann Jr N C, Tobias B J, Lee W C, Park H K, Yun G S, Classen I G J, Donné A J H
[12] Munk B A (translated by Hou X Y) 2009 Frequency Selective Surface Theory and Design (Beijing: Science Press) (in Chinese) [Munk B A 著(侯新宇 译) 2009 频率选择表面理论与设计(北京: 科学出版社)]
[13] Winnewisser C, Lewen F, Helm H
[14] Ebbesen T W, Lezec H J, Ghaemi H F, Thio T, Wolff P A 1998 Nature 391 667
[15] Chen C C 1973 Transmission of Microwave Through Perforated Flat Plates of Finite Thickness IEEE pp1-6
[16] Pickett H M, Farhoomand J, Chiou A E 1984 Appl. Opt. 23 4228
[17] Wang X Z, Gao J S, Xu N X 2013 Acta Phys. Sin. 62 167307 (in Chinese) [王秀芝, 高劲松, 徐念喜 2013 62 167307]
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