parabolična antena

parabolična antena

The most frequently found satellite TV antenna, it takes its name from the shape of the dish described mathematically as a parabola. The function of the parabolic shape is to focus the weak microwave signal hitting the surface of the dish into a single focal point in front of the dish. It is at this point that the feedhorn is usually located.

0 0

完善词条

添加图像

词性：名词
同义词：
词汇：
行业/领域：航空航天
类别卫星
Company:
产品：
取首字母的缩写词：

添加至 My Glossary

其他语言：

类似词条

antena

天文学; 行星科学

A conductor by which electromagnetic waves are transmitted or received.

antena

航空航天; 卫星

A device for transmitting and receiving radio waves. Depending on their use and operating frequency, antennas can take the form of a single piece of wire, a di-pole a grid such as ...

orbitalni period

航空航天; 卫星

The time that it takes a satellite to complete one circumnavigation of its orbit.

šum

航空航天; 卫星

Any unwanted and unmodulated energy that is always present to some extent within any signal.

modulator

航空航天; 卫星

A device which modulates a carrier. Modulators are found as components in broadcasting transmitters and in satellite transponders. Modulators are also used by CATV companies to ...

herc (Hz)

航空航天; 卫星

The name given to the basic measure of radio frequency characteristics. An electromagnetic wave completes a full oscillation from its positive to its negative pole and back again ...

interferencija

航空航天; 卫星

Energy which tends to interfere with the reception of the desired signals, such as fading from airline flights, RF interference from adjacent channels, or ghosting from reflecting ...

inklinacija

航空航天; 卫星

The angle between the orbital plane of a satellite and the equatorial plane of the earth.

新闻词条

精选词条

svetiana

0
词条
1
词汇
4
关注者

行业/领域：艺术与工艺类别油画

vrt naslade

Bosch's most famous and unconventional picture, The Garden of Earthly Delights was painted between 1490 and 1510. The oil painting is on three panels, ...