Array antenna apparatus having shortest wiring distance to antenna elements
AssigneeNEC Corporation
InventorNaoyuki Orihashi
Life of this patent
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Abstract
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.
Claims5
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 the respective antenna elements;
- and
- a delay circuit provided at each of one or more of the feeder lines,
- wherein 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, wherein:
- the delay circuit is formed using a phase shifter;
- and
- 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 feeder line and the predetermined reference length is an integer multiple of the phase shift step of the phase shifter.
An array antenna apparatus comprising:
- a radio circuit;
- an array antenna that includes a plurality of antenna elements;
- and
- feeder lines that connect the radio circuit to the respective antenna elements,
- wherein the radio circuit includes:
- a mixer circuit that performs any one of mixing a local signal and a base band signal so as to output a modulation signal to each antenna element and mixing a modulation signal and a local signal so as to output a base band signal;
- and
- a delay circuit that delays a phase of the base band signal, wherein:
- the delay circuit is formed using a phase shifter;
- and
- 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 feeder line and the predetermined reference length is an integer multiple of the phase shift step of the phase shifter.
An array antenna apparatus comprising:
- a radio circuit;
- an array antenna that includes a plurality of antenna elements;
- and
- feeder lines that connect the radio circuit to the respective antenna elements,
- wherein the radio circuit includes:
- a mixer circuit that performs any one of mixing a local signal and a base band signal so as to output a modulation signal to each antenna element and mixing a modulation signal and a local signal so as to output a base band signal;
- and
- a delay circuit that delays a phase of the local signal, wherein:
- the delay circuit is formed using a phase shifter;
- and
- 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 feeder line and the predetermined reference length is an integer multiple of the phase shift step of the phase shifter.
5-9. (canceled)
Dependencies are inferred from the claim text.