The antenna pattern must be considered because it is costly to change the pattern of a long-wave or medium-wave antenna.
12.
As the reactive part is also divided by 2, the impedance of a quarter-wave antenna is \ scriptstyle ), that is, 5.14 dBi.
13.
The " RB " Travelling Wave Antenna is popular for use by Governments, UN, Military, NGOs, and is marketed in various configurations as a BBA-100.
14.
The Slim Jim variation of the J-pole antenna has characteristics and performance similar to a simple or folded Half-wave antenna and identical to the traditional J-pole construction.
15.
The conventional Leaky Wave antenna has had limited commercial success because it lacks complete backfire-to-endfire frequency scanning capability . The CRLH allowed complete backfire-to-endfire frequency scanning, including broadside.
16.
Small umbrella antennas were widely used with portable transmitters by military signal corps during World War I, since there was no possibility of setting up full-sized quarter-wave antennas.
17.
But where the hospital systems use large magnets to generate a nuclear magnetic response, NQR uses a radio wave antenna that has a magnetic field associated with it.
18.
Weber's first " Gravitational Wave Antenna " was on display in the Smithsonian Institution as part of " Einstein : a Centenary Exhibit " from March 1979 to March 1980.
19.
Hwange, Zimbabwe's best-known park, also has large herds of zebra, scores of doe-like impala, smaller groups of sable and kudu antelope, and families of warthog whose tufted tails wave antenna-like as they trot along.
20.
Vatican Radio director, the Rev . Federico Lombardi, said Wednesday the station would either move or stop using one of its 31 short-wave antennas, located near several homes in the town of Santa Maria di Galeria.
