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Antenna designs incorporating metamaterials can improve the radiated power of an antenna. The newest metamaterial antennas radiate as much as 95 percent of an input radio signal. Standard antennas need to be at least half the size of the signal wavelength to operate efficiently. At 300 MHz, for instance, an antenna would need to be half a meter ...
Metamaterial antennas are a class of antennas that use metamaterials to improve performance. [15] [21] [85] [86] Demonstrations showed that metamaterials could enhance an antenna's radiated power. [15] [87] Materials that can attain negative permeability allow for properties such as small antenna size, high directivity and tunable frequency ...
A tunable metamaterial is a metamaterial with a variable response to an incident electromagnetic ... It has applications for microwave circuits and antennas. [18] [19
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. [ 1 ] NIMs are constructed of periodic basic parts called unit cells , which are usually significantly smaller than the wavelength of the externally applied ...
While an outdoor antenna is required for adequate digital reception in most locations beyond 10–25 miles (16–40 km) from TV transmitters, and smart antenna interfaces were an optionally permitted feature of coupon-eligible converter boxes, [20] there were no subsidies for antennas. Although manufacturers could sell a converter/smart-antenna ...
The best TV antennas deliver shows, sports, news and movies, with no monthly bills. Here are the best HDTV antennas on the market. The best TV antennas of 2022: Tested and rated