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Flat 2-axis Marine Antenna And Its Working Principle

Edit: Dotogo Tecchnologies Co.,Ltd      Date:Aug 14, 2017

Flat 2-axis Marine Antenna and its working principle
Flat 2-axis Marine Antenna and its working principle The emergence of satellite live television, the frequency increased to 12GHz, the wavelength becomes short of 2.5cm, which is the emergence of flat 2-axis Marine Antenna possible. In fact the flat 2-axis Marine Antenna is from the radar and communication commonly used array 2-axis Marine Antenna transplanted to Ku-band satellite TV to receive 2-axis Marine Antenna up. The so-called array type 2-axis Marine Antenna is formed by arranging a plurality of half-wave element unit 2-axis Marine Antennas in a regular row and column. Figure 2. Usually between each adjacent half-wave oscillator unit, including the line spacing and column distance, separated by half a wavelength of integer multiple, thus forming a 2-axis Marine Antenna array. The number of units of the half-wave oscillator depends on the gain requirements of the flat 2-axis Marine Antenna. The higher the gain requirement, the more the half-wave oscillator unit is used. For example, flat-panel 2-axis Marine Antenna gain requirements of 34dB, then the flat 2-axis Marine Antenna half-wave oscillator unit, you have to have as many as 480. So the more oscillator unit, the higher the gain, flat 2-axis Marine Antenna area is also greater. What is a half-wave oscillator unit 2-axis ocean antenna?

(1) This is a pair of symmetrical 2-axis Marine Antenna, each end of the arm length of 1/4 wavelength, both ends of the length of 1/2 wavelength, this 2-axis Marine Antenna called half-wave oscillator 2-axis Marine Antenna. At this time the half-wave oscillator for the resonant state, the impedance is pure resistance and the smallest, (75) no resistance, the smallest loss of the largest radiation. Its radiation pattern

(2), that is, half-wave 2-axis Marine Antenna for the axis, to the vertical radiation around the axis, from the profile to see the formation of 8-shaped radiation. If you add a reflector to the parallel side of the half-wave 2-axis Marine Antenna,

(3), the radiation becomes unidirectional. In addition to the main lobe radiation, the addition of two sidelobe radiation, that is, with other directions of radiation, although smaller. When we understand the radiation characteristics of a single half-wave transducer 2-axis Marine Antenna, we can analyze the characteristics of a 2-axis Marine Antenna array formed by a number of half-wave 2-axis Marine Antenna elements, that is, the display type 2-axis Marine Antenna The In the direction perpendicular to the 2-axis oceanic antenna array, the radiated energy of the 2-axis oceanic antenna array is the same for each half-wave element radiation, since the incident waves are equal to each other and the phases of the waves are equal. Antenna radiation is a multiple of a single oscillator. In the direction of the plane of the row and column of the 2-axis oceanic antenna array, the incident wave travels to each half-wave oscillator, and the half-wavelength of each half-wave oscillator is half a wavelength. Phase difference of 180 °, so half phase oscillator phase phase phase, the radiation offset each other, the total radiation is zero. This means that there is no radiation in the plane direction of the 2-axis Marine Antenna array. For the other direction, as shown in Figure 4, the oscillator between the direction of the wave in the direction of the difference. It is not difficult to see that, due to the different directions of radio waves, that is, different angles of incidence of θ radio waves, the formation of the travel difference is not the same, in this direction the formation of radiation is not the same, so there will be some different radiation, The number and intensity of sidelobe radiation are related to the number of half-wave oscillators. The more the vibrator, the more the sidelobe is, the weaker. From this analysis we know that the array of 2-axis Marine Antenna in the direction perpendicular to the 2-axis ocean antenna surface of the strongest wave energy, and from the 2-axis ocean antenna surface parallel to the radio waves are not received. There is also a bit of the ability to receive radio waves in other directions, which is what we do not welcome and can be eliminated by increasing the number of half-wave transducers in the 2-axis Marine Antenna array. So we can say that the flat 2-axis Marine Antenna main receiving direction is perpendicular to the 2-axis ocean antenna in the normal direction.