| 摘要 |
PURPOSE:To disperse a quantized phase error that produces a large side lobe in a specific direction, by supplying the electric power to an array antenna from a waveguide slot array antenna with a change of the feeding phase. CONSTITUTION:The electric power radiated from a waveguide slot array antenna 14 is radiated again from element antennas 1a-1n into the space via wave receiving antennas 9a-9n, switch circuits 12a-12n and 13a-13n, equiphase lines 10a-10n, and phase shifters 2a-2n. The control signal of the phase shifter 2i is set at[alpha{i-(n+1)/2}<2m>-betai]B. Then slot length with which the sum of susceptances of slots is set at 0 is selected so that an input signal is equal to -alpha{i -(N+1)/2}<2m>. When the beam is at front (beta=0), the line 10i is switched to a phase controller with which alpha{i-(n+1)/2}<2m>. Here B is the minimum unit phase angle, alpha is a constant, beta is a constant corresponding to the beam scanning angle, (n) is the number of antenna elements, (i) is the array number of the element antenna, (m) is a natural nmber, and XB is the digital phase degree quantized with B which is most approximate to X. |
