Array antenna apparatus having shortest wiring distance to antenna elements

摘要

An array antenna apparatus includes a radio circuit; an array antenna that includes a plurality of antenna elements; feeder lines that connect the radio circuit to the respective antenna elements; and a delay circuit provided at each of one or more of the feeder lines. An amount of delay of the delay circuit is set so that the sum of a phase delay by the delay circuit and a phase delay due to a difference between a length of the corresponding feeder line and a predetermined reference length is an integer multiple of 360 degrees.

主权项

1. An array antenna apparatus comprising:
a radio circuit; an array antenna that includes a plurality of antenna elements; feeder lines that connect the radio circuit to respective ones of said antenna elements; and a delay circuit provided at one or more of the feeder lines, wherein an amount of delay of the delay circuit is set so that a sum of a phase delay by the delay circuit and a phase delay due to a difference between a length of a corresponding feeder line and a predetermined reference length is an integer multiple of 360 degrees, wherein the delay circuit is formed using a phase shifter, and wherein the phase shifter has a phase shift step of an integer submultiple of 360 degrees, and a phase difference due to the difference between the length of the corresponding feeder line and the predetermined reference length is an integer multiple of the phase shift step of the phase shifter.