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AssigneeActiontec Electronics, Inc.
InventorsWilliam E. McKinzie, III, Gregory S. Mendolia, Rodolfo E. Diaz
Estimating the term…
DC inductive FSS technology is a printed slow wave structure usable for reduced size resonators in antenna and filter applications of wireless applications. It is a dispersive surface defined in terms of its parallel LC equivalent circuit that enhances the inductance and capacitance of the equivalent circuit to obtain a pole frequency as low as 300 MHz. The effective sheet impedance model has a resonant pole whose free-space wavelength can be greater than 10 times the FSS period. A conductor-backed DCL FSS can create a DC inductive artificial magnetic conductor (DCL AMC), high-impedance surface with resonant frequencies as low as 2 GHz. Lorentz poles introduced into the DCL FSS create multi-resonant DCL AMCs. Antennas fabricated from DCL FSS materials include single-band elements such as a bent-wire monopole on the DCL AMC and multi-band (dual and triple) shorted patches, similar to PIFAs with the patch/lid being a DCL FSS.
A frequency selective surface comprising a first conductive layer having a periodic structure of capacitive patches with a first period, the frequency selective surface modeled by an equivalent circuit having second Foster canonical form with a fundamental resonant frequency lower that of a second frequency selective surface consisting of a square lattice of Jerusalem crossed slots with a second period equal to the first period.
A frequency selective surface comprising a first conductive layer having a periodic structure of capacitive patches and a second layer separated from the first conductive layer, the second layer coupled to the first conductive layer such that one of an effective inductance and capacitance of an effective inductive-capacitive circuit that models electromagnetic characteristics of the frequency selective surface is substantially affected by presence of the second layer.
Dependencies are inferred from the claim text.