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A new, small-sized transmission line impedance transformer, with applications in high-speed optoelectronics

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3 Author(s)
Carvalho, M.C.R. ; Pontificial Catholic Univ. of Rio de Janeiro, Brazil ; Margulis, W. ; Souza, J.R.

A small-sized transmission line transformer (TLT) which matches 50- Omega circuits to low-input resistance components, such as semiconductor lasers and PIN photodiodes, is described. This TLT is formed by different coplanar waveguide configurations and printed on a very high-dielectric constant substrate ( in /sub r/=80). This TLT considerably improves the temporal response of high-speed photodiodes as compared with the conventional coupling scheme.<>

Published in:

Microwave and Guided Wave Letters, IEEE  (Volume:2 ,  Issue: 11 )