Open AccessDefected ground structure (DGS)‐integrated rectangular microstrip patch for improved polarisation purity with wide impedance bandwidth
Author(s) -
Kumar Chandrakanta,
Guha Debatosh
Publication year - 2014
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.2013.0567
Subject(s) - ground plane , materials science , microstrip , bandwidth (computing) , electrical impedance , aspect ratio (aeronautics) , microstrip antenna , characteristic impedance , acoustics , optics , optoelectronics , physics , engineering , electrical engineering , telecommunications , antenna (radio)
Defected ground structure (DGS)‐integrated rectangular microstrip patch has been experimentally investigated with an aim to improve polarisation purity in radiated fields. Width to length ratio (aspect ratio) of a patch attributes different characteristic features. Therefore present experimental studies have been executed for four different aspect ratio values like 1.6, 1.3, 1.0 and 0.8. Folded defects have been employed in H ‐plane. Possibility of achieving high polarisation purity (over 25 dB isolation between co‐ to cross‐polarised fields) with improved impedance bandwidth has been demonstrated. The variation in XP fields as a function of the patch aspect ratio has been investigated and a strong physical insight into the modal fields with and without DGS has been developed.