News

You are here: Home > News > Content

How To Choose The Right 2-axis Marine Antenna

Edit: Dotogo Tecchnologies Co.,Ltd      Date:Jul 24, 2017



How to choose the right 2-axis Marine Antenna

At present, there is no technical standard for the 2-axis Marine Antenna, and there are not many ocean antennas on the market. How to choose

The 2-axis Marine Antenna is hard to be accurate, and we can only talk about it from a practical point of view.

1. Select the applicable frequency band of the 2-axis Marine Antenna. Because the 2-axis Marine Antenna is used for satellite TV, flat

The antenna has a working band, so the selected 2-axis Marine Antenna will receive the frequency of the satellite TV you are ready to receive. The working frequency of the 2-axis Marine Antenna, although it has full spectrum, such as 10.7 ~ 12.75 GHz, is not as good as that of single frequency band such as 12.2 ~ 12.75 GHz or 11.7 ~ 12.75ghz. The 2-axis Marine Antenna has the obvious resonance characteristic, exceeding the working frequency band, the dissonance, gain decrease, the effect is not good. Just as people buy clothes, medium size clothes, though big and small, can be worn, but the effect is not as good as the tailoring.

2. Select the amplitude and frequency characteristics of the 2-axis Marine Antenna. We know that the size of the radiation unit is determined by the frequency of work by the principle of the 2-axis Marine Antenna. So we naturally think that when the frequency or the wavelength changes, that the fixed size radiation unit can be a half wave vibrator? If it's no longer a half-wave, it's no longer a resonant state, it's going to have a bigger loss, less radiation, and that means that the gain gets smaller. Therefore, we feel that the wider the frequency range of the working frequency, the more likely the non-resonance is, the more the loss will be, the more the gain will decrease, and the more the gain frequency will be.

After analysis, we should understand that the gain (dB) data of the 2-axis Marine Antenna is given in the working frequency. In other frequency range, will the gain be this value? Therefore, we should select the gain of the 2-axis Marine Antenna to change a small or basic 2-axis Marine Antenna throughout the working frequency range. To be sure, the larger the range of work frequency, the more difficult it is to maintain the gain.

3. Select the polarization of the 2-axis Marine Antenna. In the common parabolic antenna, there is no polarization problem, because that is the problem that should be paid attention to when choosing the high frequency head. But on the 2-axis Marine Antenna, there is a question of what polarized radio waves are being received, whether it is linear polarization or circular polarization.

4. Select the working temperature range of the 2-axis Marine Antenna. When using a paraboloid antenna, there is no operating temperature range, regardless of the heat of the south or the cold in the north. However in Marine antenna vibrator type 2 axis, its radiation unit and feeder are using microstrip technique, printed circuit board is made of sheet metal, there is cold in hot summer and cold expansion problem, the result will make the radiating element and the size of the microstrip feeder changes, which affect the properties. Therefore, users in the north and south should consider this problem in the light of the actual situation when selecting the oscillator type 2 - axis antenna.

5. Select the noise of the 2-axis Marine Antenna. The first thing to say is that the current 2-axis Marine Antenna is an integrated antenna with high frequency head. Therefore, the noise of the 2-axis Marine Antenna is the noise of choosing the built-in hf head. Since the work is in the Ku band, choose a smaller noise factor.

6. Select the installation and adjustment of the 2-axis Marine Antenna. When adjusting the 2-axis Marine Antenna, it not only needs to be reflected

To adjust the azimuth and elevation Angle of the paraboloid antenna, one more must be added: adjust the polarization Angle. Therefore, when choosing the 2-axis Marine Antenna, it should be noted that the adjustment of the three is not affected by each other, so that it can be adjusted in place and that it should be easily fixed after adjustment.

The first thing to do is to point the 2-axis Marine Antenna to the south, and if you have a satellite TV signal in the south direction, you can get the signal of the satellite in the south direction.

Second, be clear that the satellite TV signals you are prepared to receive are horizontally polarized or vertically polarized. If you receive a signal that is vertically polarized, then you can set the surface of the 2-axis Marine Antenna in place. Conversely, if the signal is horizontally polarized.

Then the azimuth Angle of the antenna can be adjusted, which can be adjusted by adjusting the third adjusting ring between the surface of the ocean antenna and the support rod. If receive satellite orbital is higher than you of the south satellite orbital, then it will be 2 axis antenna turning east sea, on the other hand if receive satellite orbital below you in the south of satellite orbital, that will be 2 shaft turn west sea antenna.