Unit quick selection method of opportunity array antenna
A technology of antenna unit and array antenna, which is applied in the direction of antenna, antenna array, electrical components, etc., can solve the problem that the opportunity array antenna unit is difficult to select, and achieve the effect of efficient selection and avoiding simulation
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Embodiment 1
[0029] With the wide application of antennas, traditional phased array antennas are too large in size and weight, it is difficult to conform to the carrier, and the gain is low, and it is difficult to meet the actual needs. On this basis, opportunistic array antennas came into being. Opportunistic array The antenna makes full use of the carrier platform to increase the antenna gain. However, it is difficult for the existing opportunistic array antennas to quickly select the array antenna units. The present invention conducts research on this and proposes a method for quickly selecting units based on the opportunistic array antennas. .
[0030] With the rapid development of antenna technology, the use of antennas is no longer limited to a single field, and has been widely used in communication, radar, aerospace and other aspects. The present invention is a method for quickly selecting units based on opportunistic array antennas. See figure 1 , including the following steps:
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Embodiment 2
[0043] The unit fast selection method of the opportunistic array antenna is the same as that of embodiment 1, in the determination of the beam width described in step (2), only the half-power beam width BW in free space of one unit in the opportunistic array antenna is used to approximately replace the BW of all antenna units Half Power Beamwidth.
[0044] The method for quickly selecting an opportunistic array antenna unit of the present invention only uses the half-power beamwidth of one antenna unit, without having to search out all the half-power beamwidths of the antenna unit one by one, and obtains the half-power beamwidth of an antenna unit on a computer It takes less than 0.02 seconds, which effectively speeds up the process of antenna unit search and selection, saves a lot of valuable time, and improves the shortcomings of the previous radar in the process of insensitive response and slow signal acquisition, so that the radar can detect the target It is in a high-spee...
Embodiment 3
[0046] The unit fast selection method of the opportunity array antenna is the same as embodiment 1-2, the outer normal vector n in the step (4) of the present invention i , the specific approximate calculation is expressed as follows,
[0047]
[0048] in, Both are rectangular coordinate axis unit vectors; i, i+1, and i+2 are respectively the i-th antenna unit, the i+1-th antenna unit, and the i+2-th antenna unit.
[0049] The present invention not only proposes to use the external normal vector n i To participate in the calculation of the angle between the maximum radiation direction and the beam pointing, and provide the external normal vector n i The specific calculation formula of , the present invention combines the current optional antenna unit with subsequent adjacent antenna units, and calculates the outer normal vector n of each antenna unit by an approximate method i , and take the outer normal vector direction as the radiation direction of the antenna element...
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