Open AccessClass of miniaturised/arbitrary power division ratio couplers with improved design flexibility
Author(s) -
Honari Mohammad Mahdi,
Mirzavand Rashid,
Mousavi Pedram,
Abdipour Abdolali
Publication year - 2015
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2015.0009
Subject(s) - microstrip , division (mathematics) , power dividers and directional couplers , electric power transmission , transmission line , electronic engineering , power (physics) , harmonic , engineering , topology (electrical circuits) , electrical engineering , mathematics , acoustics , physics , arithmetic , quantum mechanics
This study describes a new class of couplers using single‐layer microstrip lines that reduce the occupied area, suppress the harmonic components and provide arbitrary power division ratios. It consists of lumped reactances between transmission lines to reach realisable impedances and shorten line lengths. To provide a design guideline, closed‐form formulas are derived and five different designs are produced and built to investigate the couplers performance and design accuracy. The simulation results prove to be in good agreement with measurements. More than 70% size reduction with respect to the conventional structures, 12 dB harmonic suppression and high power division ratios (9:1) achieved in various presented branch line, rat race and multi‐section Wilkinson dividers. This proposed class of coupler structures can effectively be used in miniaturised and/or arbitrary power division ratio couplers with harmonic suppression.