Defected ground structure (DGS)-integrated rectangular microstrip patch for improved polarisation purity with wide impedance bandwidth
- Author(s): Chandrakanta Kumar 1 and Debatosh Guha 2
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View affiliations
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Affiliations:
1:
Department of Space, Government of India, Communication Systems Group, ISRO Satellite Centre, HAL Airport Road, Bangalore 560017, India;
2: Institute of Radio Physics and Electronics, University of Calcutta, 92 A P C Road, Kolkata 700009, India
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Affiliations:
1:
Department of Space, Government of India, Communication Systems Group, ISRO Satellite Centre, HAL Airport Road, Bangalore 560017, India;
- Source:
Volume 8, Issue 8,
04 June 2014,
p.
589 – 596
DOI: 10.1049/iet-map.2013.0567 , Print ISSN 1751-8725, Online ISSN 1751-8733
© The Institution of Engineering and Technology
Received
04/09/2012,
Accepted
09/01/2014,
Revised
04/12/2013,
Published
14/02/2014
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.
Inspec keywords: geometry; frequency selective surfaces; rectangular waveguides; microstrip antennas; antenna radiation patterns
Other keywords: DGS; aspect ratio; patch attributes; radiated fields; frequency selective property; modal fields; co-polarised fields; width-to-length ratio; wide impedance bandwidth; defected ground structure-integrated rectangular microstrip patch; polarisation purity improvement; cross-polarised fields
Subjects: Antenna theory; Artificial electromagnetic wave materials and structures; Combinatorial mathematics; Waveguides and microwave transmission lines; Single antennas; Microwave materials and structures
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