The gain G may be broken down into three factors; the antenna gain ( the directional redistribution of the power ), the radiation efficiency ( accounting for ohmic losses in the antenna ), and lastly the loss due to mismatch between the antenna and transmitter.
42.
The position / object / item packets contain the latitude and longitude, and a symbol to be displayed on the map, and have many optional fields for altitude, course, speed, radiated power, antenna height above average terrain, antenna gain, and voice operating frequency.
43.
Antenna gain ( see article ) is the main performance measure of an antenna and for the VHF and UHF frequencies used for TV the basic Yagi-Uda antenna wins on gain per weight of metal and on simplicity . talk ) 21 : 23, 2 June 2011 ( UTC)
44.
Antenna gain is usually defined as the ratio of the power produced by the antenna from a far-field source on the antenna's beam axis to the power produced by a hypothetical lossless " reciprocity, the gain of any antenna when receiving is equal to its gain when transmitting.
45.
This combination gives the antenna gain of about 100, 000, 000 ( or 80 dB, as normally measured ), making the transmitter appear about 100 million times stronger, and a receiver about 100 million times more sensitive, " provided the target is within the beam ".
46.
In other words, increasing antenna gain through the use of a larger parabolic reflector is one way of increasing the overall channel gain and, consequently, the signal-to-noise ( S / N ) ratio, which allows for greater signal loss due to rain fade without the S / N ratio dropping below its minimum threshold for successful communication.
47.
In simple terms the frequency dependency of the path loss can be explained like this : with the increase of the frequency the requirement to keep the gain of the receiving antenna intact will cause an antenna aperture to be decreased, which will result in less energy being captured with the smaller antenna, which is similar to increasing the path loss in the situation when receiving antenna gain would not have been fixed.
48.
Antenna gain \ scriptstyle G, which is equal to the antenna's directivity multiplied by the antenna efficiency, is defined as the ratio of the intensity \ scriptstyle I ( power per unit area ) of the radio power received at a given distance from the antenna ( in the direction of maximum radiation ) to the intensity \ scriptstyle I _ \ text { iso } received from an isotropic antenna at the same distance.
49.
Three antennas are overlaid on top of the probe : A large antenna gain ( 23 dB ) emits a top brush of 5.5?on either side of elliptical and 14?wide, a medium antenna gain ( 3 dB for the transmission and reception of 6.3 dB ) emits a signal in all directions of the ecliptic plane at a height of 15?and a dipole omnidirectional antenna ( 0.3 dB in the transmission and-reception 0.8 db ).
50.
Three antennas are overlaid on top of the probe : A large antenna gain ( 23 dB ) emits a top brush of 5.5?on either side of elliptical and 14?wide, a medium antenna gain ( 3 dB for the transmission and reception of 6.3 dB ) emits a signal in all directions of the ecliptic plane at a height of 15?and a dipole omnidirectional antenna ( 0.3 dB in the transmission and-reception 0.8 db ).
