LOW-LOSS SPOT-SIZE TRANSFORMER BY DUAL TAPERED WAVE-GUIDES (DTW-SST)

被引:41
作者
YAMAGUCHI, N [1 ]
KOKUBUN, Y [1 ]
SATO, K [1 ]
机构
[1] YOKOHAMA NATL UNIV,FAC ENGN,DIV ELECT & COMP ENGN,HODOGAYA KU,YOKOHAMA,KANAGAWA 240,JAPAN
关键词
D O I
10.1109/50.50765
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The insertion loss of a spot-size transformer by dual tapered waveguides (DTW-SST) is extremely reduced by controlling the shape of the tapered portion. This novel spot-size transformer is easily fabricated by using a shadow mask sputtering method. We describe a method to control independently the parameters of tapered portion such as maximum tapered angle, length, and position of tapered portion with respect to the edge of the shadow mask. A large transformation ratio (5 and 1/5) and a low insertion loss (0.7 dB) are successfully obtained. © 1990 IEEE
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页码:587 / 594
页数:8
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