High-Impedance Surfaces With Periodically Perforated Ground Planes

Because of the design limitations of conventional high-impedance surfaces (HIS), it is not possible to miniaturize the HIS and increase the bandwidth, simultaneously. To overcome this, a novel HIS is proposed with a periodically perforated ground plane. The magnetic flux flowing through the perforat...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2014-09, Vol.62 (9), p.4510-4517
Main Authors: Durgun, Ahmet Cemal, Balanis, Constantine A., Birtcher, Craig R., Hai Huang, Hongyu Yu
Format: Article
Language:English
Subjects:
Antennas
Asymmetry
Bands
Bandwidth
Bandwidth enhancement
electromagnetic bandgap (EBG)
Geometry
Ground plane
high-impedance surface (HIS)
Impedance
Inductance
miniaturization
Perforations
Periodic structures
Surface impedance
surface wave suppression
Surface waves
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Summary:Because of the design limitations of conventional high-impedance surfaces (HIS), it is not possible to miniaturize the HIS and increase the bandwidth, simultaneously. To overcome this, a novel HIS is proposed with a periodically perforated ground plane. The magnetic flux flowing through the perforations results in an extra inductance which increases the fractional bandwidth and decreases the center frequency. Since the perforated HIS can also be considered as a defected ground structure (DGS), surface wave suppression can also be achieved by properly determining the geometry of the perforations. Therefore, a bandgap can be obtained without the need of vias, which considerably increase fabrication costs. It is also possible to tune and overlap the reflection phase and surface wave suppression bands. However, due to the rotational asymmetry of the structure, surface wave suppression is achieved in only one direction.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2014.2331703