The antenna is a very important part of the radio system and its importance cannot be overstated. Of course, antennas are only one aspect of a radio system. When discussing antenna, people often talk about height and power. In fact, as a system, all aspects should be reasonably planned and arranged. The barrel effect must be understood by everyone. The discussion problem needs to control variables, and the discussion of antenna is carried out under the condition that all other conditions are identical.
As the saying goes, “a good horse is a good saddle”, and a good station in a good location needs a good antenna to go along with it. Interest in the satellite connection was not as high as it had been, and the head of the gimlet failed twice in quick succession due to high winds on the roof. So, I removed the Yuntai and Yagi, put on a car Miao sub antenna. What kind of antenna to use, depending on your needs, the appropriate antenna is very important.
At the time of transmission, the radio output signal is transmitted through the feeder to the antenna, which radiates out in the form of electromagnetic waves. When the waves reach the receiving site, a tiny, tiny fraction of their power is captured by the antenna, which converts radio signals from the air into electrical signals that can be recognized by the station. Antenna is a very important device for transmitting and receiving electromagnetic waves. It can be said that without antenna, there would be no widespread use of radio today.
The Yagi antenna I used before is a directional antenna. Directional antenna means that it radiates only in a certain Angle range on the horizontal pattern, which is commonly referred to as directivity. In fact, Yagi radiates only at a certain Angle in the vertical direction, so satellite communication requires both horizontal and vertical rotation. The greater the number of cells, the smaller the lobe width, the greater the gain, and the higher the accuracy of the steering equipment is required.
Omnidirectional antenna means 360° uniform radiation in the horizontal pattern, which is commonly referred to as no direction. But on a vertical graph, it radiates only at certain angles. For the commonly used FRP rod antenna, the longer the antenna length, the smaller the vertical lobe width and the larger the gain.
Antenna is not good or bad, each has advantages and disadvantages, we should choose their own antenna according to the actual demand and erection conditions.
Post time: Dec-13-2022
