| 摘要 |
PROBLEM TO BE SOLVED: To largely and continuously change the beam tilt angle of an array antenna by using two-way distributors and phase shifters. SOLUTION: In this feeding equipment, plural sets of feeding part 11a, 11b, 11c each consisting of a two-way distributor 13a, 13b, 13c and a phase shifter 14a, 14b, 14c feeds radiation power to the array antenna 2. By feeding the radiation power through the first feeding part 11a and the following second or third part 11b, 11c which are subordinately connected with the first one, the radiation power with different phases is produced, which will be then sent to the elements 2a, 2b, 2c,..., 2g of the antenna 2. By respectively adjusting the phase shifters in the first, second and third feeding parts so that the radiation power to be fed to the antenna elements can be set out of phase with one another by a certain phase angle, the beam tilt angleθcan be set by the array antenna 2 on the whole.
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