Design and analysis of balanced-tounbalanced and unbalanced-to-balanced power dividers

No Thumbnail Available
Journal Title
Journal ISSN
Volume Title
This research deals with various types of balanced-to-unbalanced and unbalanced-to-balanced power dividers. Balanced circuits are used to suppress common-mode noise and it has high immunity to crosstalk. To design a fully balanced transceiver, various types of balanced circuits are required. Among those balanced circuits, balanced power dividers are very important. It is used to divide the power equally or in a specific ratio. A balanced-to-unbalanced power divider, with a balanced input and several single-ended outputs, is suitable to feed unbalanced loads such as monopole antenna el- ements from a balanced amplifier. Similarly, an unbalanced-to-balanced power divider is suitable to feed a balanced antenna array from an unbalanced source. In this thesis, various types of balanced-to-unbalanced power dividers are proposed. Two Gysel type equal power dividers are analyzed, designed and fabricated, one for in-phase (phase difference between output signals is 0◦) and the other for out-of-phase (phase difference between output signals is 180◦) application. Another Wilkinson type equal power divider is also analyzed, designed and fabricated for out-of-phase application. Complete theoretical analysis of balanced-to-unbalanced power divider for arbitrary power division is also presented. Two power dividers of power division ratio 1:2 have been designed, fabricated and measured, one for in-phase and other is for out-of-phase application.
Supervisor: Ratnajit Bhattacharjee