Title :
A new, small-sized transmission line impedance transformer, with applications in high-speed optoelectronics
Author :
Carvalho, M. Cristina R ; Margulis, W. ; Souza, J.R.
Author_Institution :
Pontificial Catholic Univ. of Rio de Janeiro, Brazil
Abstract :
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.<>
Keywords :
impedance matching; optical communication equipment; optoelectronic devices; strip line components; 50 ohm circuits; CPW; PIN photodiodes; coplanar waveguide; coupling scheme; high-dielectric constant substrate; high-speed optoelectronics; high-speed photodiodes; impedance transformer; low-input resistance components; semiconductor lasers; small-sized type; temporal response; transmission line; Coplanar transmission lines; Coplanar waveguides; Dielectric substrates; Distributed parameter circuits; Impedance; PIN photodiodes; Semiconductor lasers; Semiconductor waveguides; Transmission lines; Waveguide lasers;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
