Patent Application
20200006855
This Nonprovisional application claims priority under 35 U.S.C. ยง 119 on Patent Application No. 2018-125220 filed in Japan on Jun. 29, 2018, the entire contents of which are hereby incorporated by reference.
The present invention relates to a radio communication device.
A technique is known which can simplify a structure of, reduce the size of, and achieve weight saving of a configuration including composite two antennas. For example, Patent Literature 1 discloses a configuration in which a patch antenna and an inverted F antenna are provided adjacent to each other so that elements of the two antennas do not overlap each other.
[Patent Literature 1]
Japanese Patent Application Publication Tokukai No. 2017-063255
However, in a case where the two antennas are identical in their optimal locations, only one of the two antennas can be provided in such an optimal location. This causes a problem that the other of the two antennas deteriorates its performance.
In view of the problem, an object of an aspect of the present invention is to provide a radio communication device in which two antennas are provided in a single location.
In order to solve the above problem, a radio communication device in accordance with an aspect of the present invention includes: (i) a first antenna including a first conductor section and a short-circuit section; and (ii) a second antenna including a second conductor section and a signal line, the second conductor section being configured to overlap with the first conductor section, the second antenna being configured to employ, as a ground section, the first conductor section, and the signal line being configured to pass through a path that overlaps with the short-circuit section.
With the configuration of such an aspect of the present invention, it is possible to provide a radio communication device in which two antennas are provided in a single location.
The following description will discuss, in detail, Embodiment 1 of the present invention.
The radio communication device 100 includes a casing 2 in which a first substrate (substrate) 1 is provided. The casing 2 includes a first ground plate 3. The radio communication device 100 further includes the first antenna 4 and the second antenna 7.
As illustrated in (a) of
As illustrated in (a) of
As illustrated in (b) of
As illustrated in (a) and (b) of
With the configuration of Embodiment 1, in the radio communication device 100, the second ground plate 9 of the second antenna 7 is integrated with the conductor element 5 of the first antenna 4. As such, the second antenna 7 can be provided on the first antenna 4, instead of being affected by an electrical configuration of the first antenna 4.
Furthermore, the wiring section 10 of the second antenna 7 is integrated with the short-circuit section S of the first antenna 4. As such, the second antenna 7 can be provided on the first antenna 4, instead of affecting the electrical configuration of the first antenna 4. That is, the first antenna 4 is not electrically affected by the electrical configuration of the second antenna 7.
With the configuration, the first antenna 4 and the second antenna 7 can be provided in a single location. It follows that optimum provision is realized for both of the first and second antennas.
The following description will discuss Embodiment 2 of the present invention. Note that, for convenience, members having identical functions to those of Embodiment 1 are given identical reference signs, and their descriptions will be omitted.
The second antenna 7 is a patch antenna. The second antenna 7 further includes a second substrate 11 in addition to the configuration of Embodiment 1. According to the second antenna 7, the second antenna 7 employs, as a ground section, (i) a second ground plate 9 of the second substrate 11 and (ii) a conductor element 5 of the first antenna 4. As such, the second antenna 7 is configured so that a patch element (conductor section) 8a of the second antenna 7 overlaps, in parallel, with the second ground plate 9 of the second substrate 11. As illustrated in (a) and (b) of
With the configuration of Embodiment 2, since the second antenna 7 is such a patch antenna, the second antenna 7 can be short in height. It is therefore possible for the antenna characteristics of the first antenna 4 to be less affected by the second antenna 7.
The following description will discuss Embodiment 3 of the present invention. Note that, for convenience, members having identical functions to those of Embodiment 2 are given identical reference signs and their descriptions will be omitted. According to Embodiment 3, a configuration in which a radio signal processing section (radio circuit) 12 is added to the radio communication device 100 as has been discussed in Embodiment 2.
As illustrated in (a) and (b) of
Note that the radio signal processing section 12 is covered with a shielding case. Note also that the radio signal processing section 12 is connected to the second substrate 11, for example, by use of a conductive double-sided tape or a conductive adhesive.
With the configuration of Embodiment 3, the radio signal processing section 12 and the patch element 8a are provided so as to come close to each other. This allows a reduction in loss of signals that pass through between them. Furthermore, the signals, which pass through the wiring section 10, are controlled to have a lower frequency, and are then controlled, to have a higher frequency, by the radio signal processing section 12. This can facilitate signal processing in the wiring section 10.
The following description will discuss Embodiment 4 of the present invention. Note that, for convenience, members having identical functions to those of Embodiment 2 are given identical reference signs and their descriptions will be omitted. According to Embodiment 4, a configuration in which a radio signal processing section 12 is added to the radio communication device 100 as has been discussed in Embodiment 2.
As illustrated in (a) and (b) of
Note that the radio signal processing section 12 is covered by a shield casing. The radio signal processing section 12 is connected to the conductor element 5 of the first antenna 4, via the shield casing.
With the configuration of Embodiment 4, the second antenna 7 and the radio signal processing section 12 are provided so as to overlap each other. This allows a reduction in size of the second substrate 11 that constitutes the second antenna 7. This ultimately allows (i) a reduction in effects on the first antenna and (ii) heat, caused by the radio signal processing section 12, to be released via the conductor element 5 of the first antenna 4.
The following description will discuss Embodiment 5 of the present invention. Note that, for convenience, members having identical functions to those of Embodiments 1 through 4 are given identical reference signs and their descriptions will be omitted.
A wiring section 10 of the second antenna 7 is integrated with a short-circuit section S of the first antenna 4. As illustrated in (a) and (b) of
With the configuration of Embodiment 5, the wiring section 10 of the second antenna 7 is integrated with the short-circuit section S of the first antenna 4. This makes it easy to carry out wirings for the first antenna 4 and the second antenna 7.
The following description will discuss Embodiment 6 of the present invention. Note that, for convenience, members having identical functions to those of Embodiments 1 through 5 are given identical reference signs and their descriptions will be omitted.
The second antenna 7 employs, as a second ground plate 9, a conductor element of the first antenna 4. As illustrated in (a) and (b) of
With the configuration of Embodiment 6, the second antenna 7 employs, as the second ground plate 9, the conductor element of the first antenna 4. This causes members for the conductor element to be cut down. This ultimately eliminates a member for electrically connecting the conductor element and the second ground plate 9.
The following description will discuss Embodiment 7 of the present invention. Note that, for convenience, members having identical functions to those of Embodiments 1 and 2 are given identical reference signs and their descriptions will be omitted.
As illustrated in (a) and (b) of
With the configuration of Embodiment 7, in a case where (i) the first antenna 4 is provided near an outer edge of the radio communication device 100 or (ii) the first antenna 4 is configured by an exterior part(s) of the radio communication device 100, the second antenna 7 can be arranged instead of causing an exterior appearance of the radio communication device 100 to project.
The following description will discuss Embodiment 8 of the present invention. Note that, for convenience, members having identical functions to those of Embodiments 1 and 2 are given identical reference signs and their descriptions will be omitted.
For example, a thin copper foil is employed as a patch element 8a. As such, (i) the patch element 8a of the second antenna 7 and (ii) a conductor element 5 of the first antenna 4 are arranged so as to be on the same level.
As illustrated in (a) of
As illustrated in (a), (b), and (c) of
Note that it is only necessary that the conductor element 5 of the first antenna 4 and the second ground plate 9 of the second antenna 7 are electrically connected. As such, the conductor element 5 and the second ground plate 9 can be electrically connected in a manner different than the above manner.
With the configuration of Embodiment 8, the first antenna 4 and the second antenna 7 can be arranged so as to be on the same level, while securing a spaced distance between (i) a ground plate in the radio communication device 100 and (ii) the first antenna 4. This makes it possible to (i) prevent the first antenna 4 from deteriorating its performance and (ii) arrange the second antenna 7 instead of causing an exterior appearance of the radio communication device 100 to project.
The following description will discuss Embodiment 9 of the present invention. Note that, for convenience, members having identical functions to those of Embodiments 1 through 8 are given identical reference signs and their descriptions will be omitted.
The radio communication device 100 further includes a heat radiation sheet (heat radiating section) 15. The heat radiation sheet 15 is made of, for example, a gelatinous substance or silicon. The heat radiation sheet 15 is provided between (i) a conductor element 5 of the first antenna 4 and (ii) either a first substrate 1 or a casing 2 of the radio communication device 100 (see (a), (b), and (c) of
With the configuration of Embodiment 9, it is possible to lead heat, which is generated by a radio signal processing section 12 of the second antenna 7, to a large metallic member. This causes the heat thus generated to be radiated. Examples of the large metallic member encompass a ground of the first substrate 1 or a first ground plate 3 of the casing 2.
[Recap]
A radio communication device in accordance with a first aspect of the present invention includes: (i) a first antenna including a first conductor section and a short-circuit section; and (ii) a second antenna including a second conductor section and a signal line, the second conductor section being configured to overlap with the first conductor section, the second antenna being configured to employ, as a ground section, the first conductor section, and the signal line being configured to pass through a path that overlaps with the short-circuit section.
In a second aspect of the present invention, the radio communication device can be configured such that, in the first aspect, the second antenna is a patch antenna, the second antenna includes a substrate, the second antenna employs, as a ground section, (i) a ground of the substrate and (ii) the first conductor section, and the second conductor section and the ground of the substrate are configured to overlap each other in parallel.
In a third aspect of the present invention, the radio communication device can be configured such that, in the second aspect, a radio circuit that is to be connected to the second conductor section is further included, the radio circuit being arranged so as to come, on the substrate, close to the second conductor section.
In a fourth aspect of the present invention, the radio communication device can be configured so that, in the second aspect, a radio circuit that is connected to the second conductor section is further included, the radio circuit being provided, on the ground section, so as to be opposite to the second conductor section.
In a fifth aspect of the present invention, the radio communication device can be configured such that, in any one of the first through fourth aspects, the short-circuit section of the first antenna is composed of the signal line of the second antenna.
In a sixth aspect of the present invention, the radio communication device can be configured such that, in the first or second aspect, the first conductor section has a recess, and
the second antenna is placed in the recess.
In a seventh aspect of the present invention, the radio communication device can be configured such that, in the first or second aspect, the first conductor section and the second conductor section are arranged so as to be on the same level.
In an eighth aspect of the present invention, the radio communication device can be configured such that, in the first or second aspect, a heat radiating section is further included, the heat radiating section being provided between (i) the first conductor section and (ii) either a substrate or a casing of the radio communication device.
The present invention is not limited to the embodiments, but can be altered by a skilled person in the art within the scope of the claims. The present invention also encompasses, in its technical scope, any embodiment derived by combining technical means disclosed in differing embodiments. Further, it is possible to form a new technical feature by combining the technical means disclosed in the respective embodiments.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2018-125220 | Jun 2018 | JP | national |
