Multi-band radiating elements with composite right/left-handed meta-material transmission line
First Claim
1. A multi-mode resonant radiating element, comprising:
- a plurality of composite right/left-handed (CRLH) transmission line (TL) unit-cells configured for operation at multiple radio frequency bands;
each said unit-cell comprising a conductive patch connected to a ground plane through a via; and
said plurality of unit-cells forming a resonator;
wherein said radiating element radiates an ith radiation pattern at the ith resonant frequency, and a, jth radiation pattern at a different jth resonant frequency;
wherein said ith radiation pattern is of a different shape than said jth radiation pattern; and
wherein a single patch spans a plurality of said unit cells and connects to said ground plane through a plurality of vias in forming an inductor-loaded transmission line unit-cell implementation.
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Accused Products
Abstract
Dual-band and multi-band radiating elements are described based on composite right/left-handed (CRLH) meta-material transmission line (TL). These elements can operate as resonators and/or antennas depending on feed-line configuration. The radiating elements are based on the fundamental backward wave supported by a composite right/left-handed (CRLH) meta-material transmission line (TL). Unit-cells of the transmission line comprise conductive patches coupled through vias to a ground plane. The physical size and operational frequencies of the radiating element is determined by the unit cell of the CRLH meta-material. This radiating element is configured for monopolar radiation at a first resonant frequency and patch-like radiation at a second resonant frequency. The first and second resonant frequencies are not constrained to a harmonic relationship.
252 Citations
16 Claims
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1. A multi-mode resonant radiating element, comprising:
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a plurality of composite right/left-handed (CRLH) transmission line (TL) unit-cells configured for operation at multiple radio frequency bands; each said unit-cell comprising a conductive patch connected to a ground plane through a via; and said plurality of unit-cells forming a resonator; wherein said radiating element radiates an ith radiation pattern at the ith resonant frequency, and a, jth radiation pattern at a different jth resonant frequency; wherein said ith radiation pattern is of a different shape than said jth radiation pattern; and wherein a single patch spans a plurality of said unit cells and connects to said ground plane through a plurality of vias in forming an inductor-loaded transmission line unit-cell implementation. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A dual-mode resonant radiating element, comprising:
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a plurality of composite right/left-handed (CRLH) transmission line (TL) unit-cells; each said unit-cell comprising a conductive patch connected to a ground plane through a via; and said plurality of unit cells forming a resonator; wherein said radiating element radiates a monopolar radiation pattern at a first resonant frequency, and a patch-like radiation pattern at a second resonant frequency; and wherein a single patch spans a plurality of said unit cells and connects to said ground plane through a plurality of vias in forming an inductor-loaded transmission line unit-cell implementation. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A dual-mode, resonant radiating element, comprising:
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a plurality of composite right/left-handed (CRLH) transmission line (TL) unit-cells; at least one conductive patch; a ground plane; and a plurality of vias coupled between said at least one conductive patch and said ground plane forming an inductor-loaded transmission line (TL); said via provides an inductance LL as a left-handed (LH) attribute; wherein right-handed (RH) attributes arise in response to inductance LR from current flow on the unit-cell, and in response to capacitance CR from an electric field between the conductive patch and the ground plane; wherein said radiating element radiates a monopolar radiation pattern at a first resonant frequency and a patch-like radiation pattern at a second resonant frequency; wherein the first and second resonant frequencies are not constrained to being harmonics of one another; and wherein a single patch spans a plurality of said unit cells and connects to said ground plane through a plurality of vias in forming an inductor-loaded transmission line unit-cell implementation.
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Specification