Open AccessGraphical approach to designing high‐gain low‐noise MWPLs
Author(s) -
Jahanbozorgi Mandana,
Hosseini Seyyed Esmail
Publication year - 2019
Publication title -
iet optoelectronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.379
H-Index - 42
eISSN - 1751-8776
pISSN - 1751-8768
DOI - 10.1049/iet-opt.2018.5144
Subject(s) - noise figure , smith chart , noise (video) , computer science , automatic gain control , low noise amplifier , photonics , figure of merit , noise figure meter , electronic engineering , high gain antenna , chart , amplifier figures of merit , effective input noise temperature , constant (computer programming) , amplifier , electrical engineering , engineering , artificial intelligence , mathematics , impedance matching , optics , telecommunications , physics , statistics , bandwidth (computing) , image (mathematics) , computer vision , electrical impedance , programming language
This study introduces an analytical approach to compromise between the figures of merit of a microwave photonic link (MWPL) and accordingly to design its corresponding matching networks using a graphical tool such as the Smith chart. In particular, the concept of constant gain and noise figure circles in the Smith chart is introduced in the field of microwave photonics. An analytical approach is used and expressions for circles of constant gain and noise figure are derived for unconditionally stable MWPLs. Then a procedure for designing high‐gain low‐noise MWPLs in the Smith chart is presented which involves trade‐offs between gain and noise figure. Since the presented systematic approach is similar to the one used in high‐gain low‐noise amplifier design, using this approach to designing the intrinsic link leads to a consistency in the whole design procedure.