Low-profile antenna device
US-2018261913-A1 · Sep 13, 2018 · US
Antenna device
US2019393596A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2019393596-A1 |
| Application number | US-201716323347-A |
| Country | US |
| Kind code | A1 |
| Filing date | Sep 11, 2017 |
| Priority date | Oct 21, 2016 |
| Publication date | Dec 26, 2019 |
| Grant date | — |
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- Title
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- Abstract
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- Assignees and inventors
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- First independent claim
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Abstract
Official abstract text for this publication.
In an antenna device, when an AM/FM antenna as a first antenna and an SDARS antenna or a GPS antenna as a second antenna that have different frequency bands are provided in a common case, an additional conductor portion extends out from a conductor main body portion of a capacitive element, and the additional conductor portion includes a parallel strip-shaped portion having a length that is ¼ of an effective wavelength in a frequency band of the second antenna, and extending parallel to the conductor main body portion.
First claim
Opening claim text (preview).
1 . An antenna device comprising a first antenna and a second antenna that are provided in a common case and have different frequency bands, wherein an additional conductor portion extends out from a conductor main body portion of the first antenna, and the additional conductor portion includes a predetermined-length portion extending at a distance along an edge of the conductor main body portion and having a predetermined length corresponding to a frequency band of the second antenna. 2 . The antenna device according to claim 1 , wherein the predetermined-length portion of the additional conductor portion is arranged to correspond to a region having a high electric field of the conductor main body portion in the frequency band of the second antenna. 3 . The antenna device according to claim 1 , wherein the predetermined-length portion of the additional conductor portion has a length that is substantially ¼ of an effective wavelength in the frequency band of the second antenna. 4 . The antenna device according to claim 1 , wherein a separation distance between the first antenna and the second antenna in a horizontal direction is substantially within ½ of a wavelength in the frequency band of the second antenna. 5 . The antenna device according to claim 1 , wherein the second antenna is omnidirectional in a horizontal plane, and a difference between a maximum gain and a minimum gain of the second antenna at a predetermined elevation angle is small as compared with a case where the additional conductor portion is not present. 6 . The antenna device according to claim 1 , further comprising a third antenna that is provided in the case, wherein the third antenna has a frequency band different from the frequencies of the first antenna and the second antenna, another additional conductor portion extends out from the conductor main body portion, and said another additional conductor portion includes a predetermined-length portion extending at a distance along an edge of the conductor main body portion and having a predetermined length corresponding to the frequency band of the third antenna. 7 . The antenna device according to claim 6 , wherein the predetermined-length portion of said another additional conductor portion is arranged to correspond to a region having a high electric field of the conductor main body portion in the frequency band of the third antenna. 8 . The antenna device according to claim 6 , wherein the predetermined-length portion of the other additional conductor portion has a length that is substantially ¼ of an effective wavelength in the frequency band of the third antenna. 9 . The antenna device according to claim 6 , wherein a separation distance between the first antenna and the third antenna in a horizontal direction is substantially within ½ of a wavelength in the frequency band of the third antenna. 10 . The antenna device according to claim 6 , wherein the third antenna is omnidirectional in a horizontal plane, and a difference between a maximum gain and a minimum gain of the third antenna at a predetermined elevation angle is small as compared with a case where the additional conductor portion is not present. 11 . The antenna device according to claim 1 , wherein the additional conductor portion is a separate component from the conductor main body portion and is fixed to or integrated with the conductor main body portion. 12 . The antenna device according to claim 1 , wherein the first antenna is an AM/FM antenna, and a capacitive element of the AM/FM antenna includes the conductor main body portion and the additional conductor portion.
Assignees
Inventors
Classifications
- H01Q1/521Primary
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Frequently asked questions
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- What does patent US2019393596A1 cover?
- In an antenna device, when an AM/FM antenna as a first antenna and an SDARS antenna or a GPS antenna as a second antenna that have different frequency bands are provided in a common case, an additional conductor portion extends out from a conductor main body portion of a capacitive element, and the additional conductor portion includes a parallel strip-shaped portion having a length that is ¼ o…
- Who is the assignee on this patent?
- Yokowo Seisakusho Kk
- What technology area does this patent fall under?
- Primary CPC classification H01Q1/521. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Dec 26 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).