Open AccessCPW balun for printed balanced antennas
Author(s) -
Sánchez A.M.,
Ribó M.,
Pradell L.,
Anguera J.,
Andújar A.
Publication year - 2014
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2014.0907
Subject(s) - balun , electronic engineering , directional antenna , electrical engineering , optoelectronics , computer science , materials science , physics , engineering , antenna (radio)
In coplanar waveguide (CPW) circuits, printed balanced antennas must be excited through baluns. These baluns often feature coplanar‐to‐slotline transitions that must be tuned and matched by electromagnetic optimisation, and may interfere with the antenna backward radiation. A new CPW balun for printed balanced antennas is presented and modelled. As its multimodal circuit model makes clear, it integrates an impedance‐matching network within its structure that can be analytically designed. The balun has been experimentally tested, exhibiting good agreement with its circuit model and a weak electromagnetic interaction with the antenna radiation.