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Metamaterial antenna
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Metamaterial antennas are a class of antennas which use metamaterials to increase performance of miniaturized antenna systems. Their purpose, as with any electromagnetic antenna, is to launch energy into free space. However, this class of antenna incorporates metamaterials, which are materials engineered with novel, often microscopic, structures to produce unusual physical properties. Antenna designs incorporating metamaterials can step-up the antenna's radiated power.
This Z antenna tested at the National Institute of Standards and Technology is smaller than a standard antenna with comparable properties. Its high ef
This Z antenna tested at the National Institute of Standards and Technology is smaller than a standard antenna with comparable properties. Its high efficiency is derived from the "Z element" inside the square that acts as a metamaterial, greatly boosting the radiated signal. The square is 30 millimeters on a side.
Microstrip line (400) for a phased array metamaterial antenna system. 401 represents unit-cell circuits composed periodically along the microstrip. 40
Microstrip line (400) for a phased array metamaterial antenna system. 401 represents unit-cell circuits composed periodically along the microstrip. 402 series capacitors. 403 are T-junctions between capacitors, which connect (404) spiral inductor delay lines to 401. 404 are also connected to ground vias 405.
A keyless entry system key fob
A keyless entry system key fob
Negative-index metamaterial
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Negative-index metamaterial or negative-index material (NIM) is a metamaterial whose refractive index for an electromagnetic wave has a negative value over some frequency range.
A negative-index metamaterial causes light to refract, or bend, differently than in more common positive-index materials such as glass lenses
A negative-index metamaterial causes light to refract, or bend, differently than in more common positive-index materials such as glass lenses
A split-ring resonator array arranged to produce a negative index of refraction, constructed of copper split-ring resonators and wires mounted on inte
A split-ring resonator array arranged to produce a negative index of refraction, constructed of copper split-ring resonators and wires mounted on interlocking sheets of fiberglass circuit board. The total array consists of 3 by 20×20 unit cells with overall dimensions of 10×100×100 millimeters. The height of 10 millimeters measures a little more than six subdivision marks on the ruler, which is marked in inches.
Split-ring resonator consisting of an inner square with a split on one side embedded in an outer square with a split on the other side. Split-ring res
Split-ring resonator consisting of an inner square with a split on one side embedded in an outer square with a split on the other side. Split-ring resonators are on the front and right surfaces of the square grid, and single vertical wires are on the back and left surfaces.