Effects of Superstrate on Electromagnetically and Gap Coupled Patch Antennas

In this paper the effects of water loading (termed as superstrate) on the characteristics of an electromagnetically (EM) and coupled pentagonal patch antennas operating in the ISM band have been described. The proposed antenna structures are analyzed using HFSS and the influence of the superstrate on resonant frequency, bandwidth, VSWR and radiation characteristics have also been analyzed. The obtained results also reveal that a larger bandwidth can be found in case the dielectric substrate is separated by air gap spacing. In addition, though impedance matching is little deteriorated due to loading, however the operating frequency band (BW) shifted to lower side significantly.

[1]  Analysing radiation from a cylindrical-rectangular microstrip patch antenna loaded with a superstrate and an air gap, using the electric surface current model , 2006, 2006 First European Conference on Antennas and Propagation.

[2]  S. Stuchly,et al.  Design of microstrip antennas covered with a dielectric layer , 1982 .

[3]  Margarita Tecpoyotl Torres,et al.  Pentagonal Microstrip Antenna Equivalent to a Circular Microstrip Antenna for GPS Operation Frequency , 2016 .

[4]  K.F. Lee,et al.  Effects of dielectric superstrates on a two-layer electromagnetically coupled patch antenna , 1989, Digest on Antennas and Propagation Society International Symposium.

[5]  A. K. Bhattacharyya,et al.  Effects of dielectric superstrate on patch antennas , 1988 .

[6]  J. Pribetich,et al.  Modelling of microstrip antenna with dielectric protective layer for lossy medium , 1988 .

[7]  Ji jun Wang,et al.  A Composite Heterostructure Mesh-shaped Patch Antenna Based on Left Handed Material , 2014 .

[8]  G. Kumar,et al.  Broadband microstrip antennas , 2002, Microstrip and Printed Antenna Design.

[9]  Qinjiang Rao,et al.  Electromagnetically coupling fed broadband low profile microstrip antenna array , 2007, 2007 IEEE Antennas and Propagation Society International Symposium.

[10]  Bhaskar Gupta,et al.  Variation of resonant frequency of a rectangular microstrip patch antenna due to accumulation of water over its surface , 2010, 2010 International Conference on Applications of Electromagnetism and Student Innovation Competition Awards (AEM2C).

[11]  Y. Lo,et al.  Superstrate effect on the resonant frequency of microstrip antennas , 1992 .

[12]  Tan Phu Vuong,et al.  A Discussion of a 60GHz Meander Slot Antenna for an RFID TAG with Lumped Element , 2014 .

[13]  Kai Fong Lee,et al.  Characteristics of a two-layer electromagnetically coupled rectangular patch antenna , 1987 .

[14]  A.B. Nandgaonkar,et al.  Design of High Gain Two-Layer Electromagnetically Coupled Patch Antenna in the ISM Band , 2007, 2007 International Conference on Electromagnetics in Advanced Applications.