A new design tapered slot antenna for ultra-wideband applications
✍ Scribed by E. Guillanton; J. Y. Dauvignac; Ch. Pichot; J. Cashman
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 166 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
The performance of S-bends, which are used for connecting wa¨eguides offset with respect to each other, is ¨ery important in integrated-optic wa¨eguide circuits. Se¨eral approaches for the design of S-bends ha¨e been reported in the literature. These include, in particular, designs based on simple sinusoidal cur¨es as well as relati¨ely complicated, but more general, polynomial cur¨es. This paper reports a comparison of the calculated pure bend loss of such S-bends for a typical silica-based wa¨eguide operating at a wa¨elength of 1550 nm. It is shown that the simple cosine S-bands yield a performance which is close to that obtained from the general polynomial cur¨e-based S-bends. Design cur¨es are also presented for these two types of S-bends. The calculations are based on the analytical expression for bend loss proposed by Marcuse.