Cavity-backed slot antenna device

Abstract

This invention provides a cavity-type slot antenna device, mounted on a metal housing, with an elongated window on the metal housing. The cavity-type slot antenna device includes a first cavity, an antenna substrate, a feed metal branch, a signal feed source, and a coupling metal branch. In the cavity-type slot antenna device, the first cavity has a metal surface, and a non-conductive plane is provided on one open side of the first cavity. The first cavity is electrically connected to the metal housing through the metal surface, and the non-conductive plane corresponds to the elongated window. The antenna substrate is located on the non-conductive plane, the feed metal branch is located on the antenna substrate, and the signal feed source is also located on the antenna substrate and electrically connected to the feed metal branch. The coupling metal branch is located on the non-conductive plane and is spaced apart from the antenna substrate to correspond to the signal feed source.

Claims

1. A cavity-type slot antenna device, disposed on a metal housing, wherein the metal housing has an elongated window, the cavity-type slot antenna device comprising: a first cavity having a metal surface, and a non-conductive plane being provided on one open side of the first cavity, the first cavity being electrically connected to the metal housing through the metal surface and the non-conductive plane corresponding to the elongated window; a second cavity located on one side of the first cavity, the second cavity mounting a speaker module corresponding to the elongated window to form a speaker device, the first cavity and the second cavity having a shared metal sidewall having an opening; an antenna substrate located on the non-conductive plane of the first cavity; a feed metal branch located on the antenna substrate; a signal feed source located on the antenna substrate and electrically connected to the feed metal branch; and a coupling metal branch located on the non-conductive plane and spaced apart from the antenna substrate to correspond to the signal feed source.

2. The cavity-type slot antenna device as described in claim 1, wherein the first cavity and the second cavity system share a housing, and the housing system is divided into the first cavity and the second cavity through the metal sidewall.

3. The cavity-type slot antenna device as claimed in claim 2, wherein the housing further comprises a first housing and a second housing, and the non-conductive plane and the antenna substrate thereon, the feed metal branch, the signal feed source and the coupling metal branch are located on the first housing.

4. The cavity-type slot antenna device as claimed in claim 3, wherein the first housing system is connected to the metal housing through a first conductive pad; and the second housing system is connected to the metal housing through a second conductive pad.

5. The cavity-type slot antenna device as described in claim 4, wherein the metal housing further includes a keyboard metal base and a keyboard metal cover, such that the first housing is connected to the keyboard metal base through the first conductive pad and the second housing is connected to the keyboard metal cover through the second conductive pad.

6. The cavity-type slot antenna device as described in claim 5, wherein the elongated window is located on one side or one bottom side of the keyboard metal base.

7. The cavity-backed slot antenna device as described in claim 2, wherein the housing is a laser-direct-formed (LDS) housing.

8. The cavity-type slotted antenna device as described in claim 2, wherein the housing system is mounted on the metal housing via at least two fixing elements.

9. The cavity-type slot antenna device as described in claim 1 further includes a grounding portion located on the antenna substrate and connected to the metal surface, and the grounding portion is electrically connected to the signal feed source.

10. The cavity-backed slot antenna device as claimed in claim 1, wherein the feed metal branch is a T-shaped metal branch.

11. The cavity-backed slot antenna device as claimed in claim 1, wherein the coupled metallic branch is a quarter-wavelength L-shaped stub.

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