D Sievenpiper High Impedance Electromagnetic Surfaces Ph D.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 53, NO. 4, APRIL 2005 1377 An Application of High-Impedance Ground Planes to Phased Array Antennas Romulo F. Jimenez Broas, Daniel F. Sievenpiper, Senior Member, IEEE, and Eli Yablonovitch, Fellow, IEEE Abstract—The high-impedance surface was used as the antenna.
This work numerically explores the relations between the positions and the widths of the frequency bandgaps that occur in some shielded high impedance surfaces and the geometrical dimensions of the structures. The reported parameterized results are useful for design issues and for circuit models conception and validation.
Introduction; Electromagnetic Band Gap Structures in Antenna Engineering. High Impedance electromagnetic surfaces, Ph. D. dissertation, Electrical Engineering Department, University of California. Diaz, R. E., and McKinzie, W. E., “ Design methodology for Sievenpiper high-impedance surfaces: an artificial magnetic conductor for positive.
Because of its high impedance, the surface wave modes on this EBGS are very different from those on a smooth metal sheet. It can support tightly bound, It can support TE modes that are bound to the surface at some frequencies, but radiate readily at other frequencies.
The electromagnetic characteristics of low-permittivity ceramics, including silica, willemite, forsterite and alumina, as substrates for a mushroom-like high impedance surface (HIS) for enhancing microstrip patch antenna (MPA) performance from 1 to 6 GHz have been explored based on a parametric study evaluating the effects of ceramic substrate thickness and permittivity on resonance frequency.
By incorporating a high impedance surface (HIS) on a conducting surface it is possible to alter its radio frequency electromagnetic properties and suppress surface waves(2). David Jefferies and Dan Handelsman(3), reported the concept of the Zagi, an antenna made from slow wave structures which has controlled coupling between the elements and which can be made significantly smaller than a.
High-impedance electromagnetic surfaces have two note- worthy characteristics over a designed frequency band that makes it an ideal choice for antenna ground planes. Its ability to suppress the propagation of surface currents allows it to partially isolate the radiating elements from the nearby electromagnetic surroundings.