Murata Manufacturing Co., Ltd.

Shota Taki

Masahiro Izawa

Yasuo Tanbo

An antenna board of an antenna device includes a connection portion, and first and second conductor elements. The connection portion includes an inner side portion electrode and an outer side portion electrode connected to a coaxial cable. The first conductor element includes first conductor portion connected to the inner side portion electrode at first end, and second conductor portion disposed such that first mounting region is present between second and third ends. The second conductor is disposed such that second and third mounting regions are respectively present between fifth end and the inner side portion electrode and between the fifth end and the outer side portion electrode. An electrical length between the first and second ends of the first conductor portion is equal to an electrical length between the fifth and sixth ends of the second conductor element.

Antenna device

An antenna unit includes a feed point, a first antenna conductor extending from the feed point and having a width that expands as a distance from the feed point increases, a second antenna conductor facing a top end edge of the first antenna conductor with a gap formed therebetween, a first connection part connecting the top end edge of the first antenna conductor and the second antenna conductor via a capacitor, and a second connection part connecting the top end edge of the first antenna conductor and the second antenna conductor via an inductor or a zero-ohm resistor. A first connection point between the first connection part and the first antenna conductor is closer to a center of the top end edge of the first antenna conductor compared with a second connection point between the second connection part and the first antenna conductor.

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Kyoto, Japan

Shota Taki