Composite right/left-handed transmission line based compact...

Details Composite right/left-handed transmission line based compact... Composite right/left-handed transmission line based compact...

2006-12-20

2008-11-04

Nguyen, Hoang V (Department: 2821)

Communications: radio wave antennas

Antennas

Microstrip

C343S749000, C343S754000, C343S909000

Reexamination Certificate

active

07446712

ABSTRACT:
An apparatus based on composite right-handed or left-handed (CRLH) principles to provide a transmission line or antenna structure having a plurality of cells to which one or more feed ports are attached. The apparatus is based on an equivalent circuit Right-Hand (RH) series induction (LR) and shunt capacitor (CR), and Left-Hand (LH) series capacitor (CL) and induction (LL), in which effective permittivity (e) and permeability (m) of the structure are manipulated by the choice of CR, LR, CL, and LL. One embodiment describes mushroom antenna cells (1D or2D array) in which vias extend up from a feed network on a ground plane through at least one dielectric region to each of a first plurality of conductive elements (plates or strips). Optionally, a second plurality of conductive elements are disposed between first and second dielectric layers to form metal-insulator-metal (MIM) capacitors to lower resonance frequency.

REFERENCES:
patent: 6426722 (2002-07-01), Sievenpiper et al.
patent: 6552696 (2003-04-01), Sievenpiper et al.
patent: 7196666 (2007-03-01), Allen et al.
patent: 2006/0145927 (2006-07-01), Choi et al.

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