TECHNICAL FIELD

The present disclosure relates to an antenna apparatus.

BACKGROUND ART

In recent years, the amount of communication data traffic in radio communication has been increasing. With the increase in communication data traffic, use of new frequency bands has been considered for radio communication.

In a case where a new frequency band is used, an apparatus performing radio communication (for example, a mobile terminal) requires an antenna adaptable to the new frequency band. On the other hand, it is difficult for a small and thin mobile terminal to ensure a space in which an antenna adaptable to the new frequency band is disposed.

Accordingly, for high-speed, large-capacity radio communication with an increasing amount of communication data traffic, multiband antenna technology with one antenna adaptable to a plurality of frequency bands has been considered.

For example, Patent Literature (hereinafter, referred to as “PTL”) 1 discloses a multiband antenna including antenna elements adaptable to low and high frequency bands, respectively, and blocking circuits configured to block transmission of signals between an antenna element for the low frequency band and an antenna element for the high frequency band.

CITATION LIST

Patent Literature

PTL 1

WO 2014-097846

SUMMARY OF INVENTION

Technical Problem

However, the multiband antenna disclosed in PTL 1 has a complicated antenna configuration due to the provision of the blocking circuits configured to block transmission of signals between the antenna element for the low frequency band and the antenna element for the high frequency band.

One non-limiting and exemplary embodiment of the present disclosure facilitates providing an antenna apparatus having a simple configuration and adaptable to a plurality of frequency bands.

An antenna apparatus according to an embodiment of the present disclosure includes: at least one first radiation element provided on one surface of a substrate and having a resonance frequency in a first frequency band; at least one second radiation element provided on the one surface of the substrate; a connection line connecting between the first radiation element and the second radiation element on the one surface of the substrate; a conductor provided at a position facing the first radiation element in an interior of the substrate and including a slot; and a power supply line supplying power to the first radiation element via the slot, wherein the connection line is connected to a center portion of the first radiation element, in a direction along a polarization direction of radiated radio waves generated by resonance, and a line length formed by the first radiation element, the connection line, and the second radiation element is set to a length so as to have a resonance frequency in a second frequency band lower than the first frequency band.

It should be noted that general or specific embodiments may be implemented as a system, an apparatus, an integrated circuit, a computer program or a storage medium, or may be implemented as any combination of a system, an apparatus, a method, an integrated circuit, a computer program, and a storage medium.

An embodiment of the present disclosure facilitates providing an antenna apparatus having a simple configuration and adaptable to a plurality of frequency bands.

Additional benefits and advantages of the disclosed embodiment will become apparent from the specification and drawings. The benefits and/or advantages may be individually obtained by the various embodiments and features of the specification and drawings, which need not all be provided in order to obtain one or more of such benefits and/or advantages.

