back radiation

back radiation

[′bak ‚rād·ē′ā·shən]
(communications)
(geophysics)
References in periodicals archive ?
When the width of the metal ground is reduced, the back radiation of the antenna is significantly enhanced and the electric field distribution in the space is more uniform.
In addition, the radiation characteristics, such as low back radiation, stable antenna gain, and symmetric E- and fl-plane radiation patterns, are achieved.
This antenna has a high attenuation of the back radiation and high gain in front radiation, as a result high front to back ratio (FB ratio) can be achieved in this antenna.
As it can be seen, due to the defects in the ground the respective resonances shifted slightly from the NGP resonances, but overall radiation characteristics are improved as they become more directional and the back radiation is reduced.
Radiation characteristics such as antenna gain, side lobe level, and back radiation are thus discussed.
These FSSs are not backed by a metal reflector hence a small amount of transmission through the FSS is allowed, which also leads to a small amount of back radiation. Although this leads to a slight reduction in the gain in the main beam direction, it helps to achieve a constant gain across an ultra-wideband.
Greenhouse gases from the atmosphere trap the heat radiating back from the earth's surface, while aerosols in the atmosphere reflect back radiation coming from the sun which causes dimming.
This is due to impedance mismatch and pattern degradation, as the back radiation level increases rapidly at these frequencies.
Front and back radiation is essentially a modified dipole (front and side waves 180 degrees out of phase), but the sound level in front is only about a third of the level from the inside rear corner.
Power-packed Tony Dobbin had the Toon army in full cry as he drove This Is Serious to peg back Radiation on the run-in to land the pounds 38,000 prize.