| CPC H01Q 13/08 (2013.01) [H01Q 1/24 (2013.01); H01Q 21/06 (2013.01); H01Q 21/30 (2013.01)] | 18 Claims |
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1. An antenna module comprising:
a first radiating element that radiates radio waves in a first polarization direction;
a second radiating element that is disposed adjacent to the first radiating element and that radiates radio waves in the first polarization direction; and
a first feed conductor that supplies a common radio-frequency signal to the first radiating element and the second radiating element, wherein
the first feed conductor includes a first common conductor, and a first conductor and a second conductor that branches off from the first common conductor,
the first conductor and the second conductor are respectively coupled to the first radiating element and the second radiating element,
under a condition that the first radiating element and the second radiating element are viewed from a branch point of the first feed conductor, frequency characteristics of an impedance of the first radiating element are different from frequency characteristics of an impedance of the second radiating element, and
under a condition that a frequency band in which a return loss is less than or equal to a predetermined value is defined as an operable band width in each of the radiating elements, the operable band width of the first radiating element partially overlaps the operable band width of the second radiating element,
wherein the antenna module further comprises:
a third radiating element and a fourth radiating element that radiate radio waves in the first polarization direction; and
a second feed conductor that supplies a common radio-frequency signal to the third radiating element and the fourth radiating element, wherein
the second feed conductor includes a second common conductor, and a third conductor and a fourth conductor branching off from the second common conductor,
the third conductor and the fourth conductor are respectively coupled to the third radiating element and the fourth radiating element,
under a condition the third radiating element and the fourth radiating element are viewed from a branch point of the second feed conductor, frequency characteristics of an impedance of the third radiating element are different from frequency characteristics of an impedance of the fourth radiating element, and
an operable band width of the third radiating element partially overlaps an operable band width of the fourth radiating element,
the first radiating element and the second radiating element make up a first sub-array,
the third radiating element and the fourth radiating element make up a second sub-array, and
the first sub-array is disposed adjacent to the second sub-array, and
wherein:
an operable band width of the first sub-array is different from an operable band width of the second sub-array,
the antenna module further comprises:
a third sub-array having the same configuration as the second sub-array; and
a fourth sub-array having the same configuration as the first sub-array,
wherein
the first to fourth sub-arrays are arranged in a first direction in order of the first sub-array, the second sub-array, the third sub-array, and the fourth sub-array,
in the first sub-array and the fourth sub-array, the first radiating element and the second radiating element are disposed adjacent to each other in a second direction,
in the second sub-array and the third sub-array, the third radiating element and the fourth radiating element are disposed adjacent to each other in the second direction, and
an angle formed between the first direction and the second direction is larger than 0° and smaller than 90°.
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