Photonic Hybrid Couplers

Microwave photonics has been introduced as a tool of achieving ultra broad communication systems. RADAR, navigation, and radio astronomy systems can also utilize microwave photonics to achieve broader bandwidths. Hybrid couplers play a major role in microwave equipments. Traditional wideband hybrid couplers are already available in the microwave domain but there are still limitations on bandwidth and phase ripple as well as input/output impedance. The aim of this work is to develop a wideband quadrature hybrid coupler utilizing microwave photonics technology and to demonstrate the application of such a coupler. Major contributions made by this work include the implementation of a photonic Hilbert transformer, used to achieve in-phase and quadrature-phase generation over a wideband frequency range with low phase ripple. This Hilbert transformer is used as a hybrid coupler to implement a microwave photonic instantaneous frequency measurement system and a photonic feed for a reconfigurable sinuous antenna. This book is recommended for students and researchers working in the area of optical communication and microwave photonics.

Autorentext

Dr. Niusha Sarkhosh is currently a research fellow at RMIT University Australia. She received the Bachelor of Electrical Eng (1st class Hons) from RMIT University in 2005. She was awarded an APA and ICT scholarship to do the PhD, which was awarded in Dec 2009. Dr. Sarkhosh's research interests include Microwave photonics and photonic devices.