Calibration network of intelligent antenna
A smart antenna and network technology, applied to antennas, antenna arrays, diversity/multi-antenna systems, etc., can solve problems such as failure to meet system requirements, poor calibration network consistency, etc., and achieve the effect of ensuring consistency
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[0019] see figure 1 and figure 2 , the calibration network of the smart antenna of the present invention includes a metal plate 1 , a metal strip 2 , a printed circuit board 3 , a joint 4 , a coaxial cable 5 and supporting structures 6 and 7 .
[0020] Among them, the metal plate 1 of the calibration network of the smart antenna in this embodiment is provided with 16 square coupling windows, 8 metal strips 2 are suspended on the metal plate 1 through the supporting structures 6 and 7, and the printed circuit board 3 is closely attached to the metal plate 1. On the lower surface of the board 1 , 9 joints 4 are respectively connected to 8 metal strips 2 and one end of the coaxial cable 5 .
[0021] Two coupling windows (not marked) under each metal strip 2 and the metal strip 2 above it, and the microstrip circuit (not marked) on the lower surface of the printed circuit board 3 constitute a directional coupler, by adjusting the two coupled The distance between the windows can...
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