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searching for Radiation efficiency 23 found (30 total)

Total active reflection coefficient (734 words) [view diff] exact match in snippet view article find links to article

{\displaystyle (1-|\Gamma _{a}^{t}|^{2})} . Since antennas in general have radiation efficiency 0 ≤ ϵ ≤ 1 {\displaystyle 0\leq \epsilon \leq 1} , the normalized

Chu–Harrington limit (982 words) [view diff] exact match in snippet view article find links to article

compared to loss resistances that may be present, thus reducing the radiation efficiency. For users this decreases the bitrate, limits range, and shortens

Rhombic antenna (1,102 words) [view diff] exact match in snippet view article find links to article

the excitation from the transmitter. This circuit can increase the radiation efficiency of transmitting antennas to the 70-80% range, at the cost of increased

Shortwave broadband antenna (1,865 words) [view diff] exact match in snippet view article find links to article

across much of, if not all of, the shortwave spectrum with good radiation efficiency and minimal compromise of the radiation pattern. Most practical broadband

Kalundborg Transmitter (704 words) [view diff] exact match in snippet view article find links to article

in the sea on the narrow Gisseløre peninsula, providing excellent radiation efficiency. Times given in Central European Time. Source: 06.00 - 06.05: News

Characteristic mode analysis (3,500 words) [view diff] exact match in snippet view article find links to article

{D}}_{n}\left({\boldsymbol {\hat {e}}},{\boldsymbol {\hat {r}}}\right)} , modal radiation efficiency η n {\displaystyle \eta _{n}} , modal quality factor Q n {\displaystyle

Dielectric resonator antenna (988 words) [view diff] exact match in snippet view article find links to article

inherent conductor loss in dielectric resonators. This leads to high radiation efficiency of the antenna. This feature is especially attractive for millimeter

Melvin M. Weiner (1,196 words) [view diff] case mismatch in snippet view article find links to article

July 1–5, 1991, p. 691 (with S. Zamoscianyk and G. J. Burke). "Radiation Efficiency and Input Impedance of Monopole Elements with Radial-Wire Ground

Random wire antenna (1,392 words) [view diff] exact match in snippet view article find links to article

where conventional impedance matching schemes are adequate. The radiation efficiency of the antenna is not changed, despite high resistance; if the antenna

Friction Acoustics (379 words) [view diff] exact match in snippet view article find links to article

roughness noise. This noise is largely broad-band near the surface, and radiation efficiency and material geometry dictates which frequency content is radiated

Halo antenna (2,145 words) [view diff] exact match in snippet view article find links to article

the number of loops, which broadens the SWR bandwidth, increases radiation efficiency, and up to a point, helps with impedance matching. More recent halo

Umbrella antenna (2,480 words) [view diff] exact match in snippet view article find links to article

VLF communications facility, operating at about 20 kHz with high radiation efficiency even though they are less than 1/ 40  wavelength high.[citation needed]

Antenna types (9,530 words) [view diff] exact match in snippet view article find links to article

to the top half of the pattern of a similar dipole antenna, and a radiation efficiency a bit less than half of the dipole. Since all of the equivalent dipole's

Antenna array (3,307 words) [view diff] exact match in snippet view article find links to article

pattern synthesis. Additional issues to be considered are matching, radiation efficiency and bandwidth. The design of an electronically steerable antenna

T-antenna (3,120 words) [view diff] exact match in snippet view article find links to article

(§ 2.2.2). ISBN 978-1-118-20975-2. la Porte, Edmund A. (2010). "Radiation efficiency". Virtual Institute of Applied Science (vias.org). Radio Antenna

Medical Device Radiocommunications Service (1,075 words) [view diff] case mismatch in snippet view article find links to article

Maxim; Karban, Pavel; Sauleau, Ronan (2018-02-28). "Electromagnetic Radiation Efficiency of Body-Implanted Devices". Physical Review Applied. 9 (2): 024033

Thermal radiation (7,056 words) [view diff] exact match in snippet view article find links to article

efficacy. Acrylic and urethane based white paints have 93% blackbody radiation efficiency at room temperature (meaning the term "black body" does not always

ABC Radio Perth (4,483 words) [view diff] exact match in snippet view article find links to article

preferably requires a proportionally larger antenna system for equal radiation efficiency. This creates greater real estate requirements where the radiation

Monitor Audio (1,362 words) [view diff] exact match in snippet view article find links to article

benefits such as a controlled directivity pattern and increased radiation efficiency. Uniform Dispersion (UD) Waveguide II: Building on the UD Waveguide

Metamaterial antenna (8,656 words) [view diff] exact match in snippet view article find links to article

arrays. Metamaterial, high-impedance groundplanes can also improve radiation efficiency and axial ratio performance of low-profile antennas located close

Loop antenna (6,582 words) [view diff] exact match in snippet view article find links to article

to 300 km (190 miles) in mountainous regions. For NVIS a typical radiation efficiency of around 1% is acceptable, because signal paths can be established

Solar water heating (7,524 words) [view diff] no match in snippet view article find links to article

its environment, due to heat loss from conduction, convection and radiation. Efficiency (the proportion of heat energy retained for a predefined time period)

Dual-band blade antenna (1,653 words) [view diff] exact match in snippet view article find links to article

{\displaystyle G=\epsilon D} where ϵ {\displaystyle \epsilon } is the antenna radiation efficiency. Impedance Z A , m o n o = 1 2 Z A , D i p o l e {\displaystyle Z_{A