Metamaterial Substrate and Superstrate Based Circular Microstrip Antenna
A circular microstrip patch antenna partially loaded with homogeneous substrate and superstrate consisting of double-negative (DNG), epsilon negative (ENG), and mu negative (MNG) is investigated to observe the changes in resonance. It is observed that embedded double-negative substrate placed under the patch displays dual band resonance characteristics with moderate realized peak gain bandwidth and superstated disc increases the gain as high as 10 dBi. Embedded ε-negative substrate provides moderate peak gain with bandwidth as high as 500 MHz and superstate metamaterial depicting dual resonance phenomena with similar gain in both bands. In either case of embedded substrate and superstate, µ- negative material exhibits dual band characteristic with poor impedance matching. The DNG or ENG metamaterial embedded substrate antenna exhibits broadside null in its elevation plane radiation pattern but that is not observed for the case of metamaterial superstate disc loading on patch.
KeywordsMetamaterial (MTM) Dispersive media Circular microstrip antenna
- 3.Itoh, T. et al.: Composite right/left-handed transmission line metamaterials. IEEE Microw. Magazine 34–50 (2004)Google Scholar
- 9.Xiong, J., Li, H., Jin, Y., He, S.: Modified TM020 mode of a rectangular patch antenna partially loaded with metamaterial for dual-band applications. IEEE Antennas Wireless Propag. Lett. 8 1006–1009 (2009)Google Scholar
- 10.Ghatak, R., Chiranjib, G., Poddar, D.R.: Investigation on resonance and radiation properties of rectangular microstrip antennas with partially filled metamaterial substrates and superstrates. Int. J. RF Microw. Comput. Aided Eng. Special Issue on “Metamaterial: RF and Microwave Applications”, 22(4), 558–568 (2012)CrossRefGoogle Scholar
- 12.Computer Simulation Technology (CST). http://www.cst.com