US-12627078-B2 - Antenna module

US12627078B2US 12627078 B2US12627078 B2US 12627078B2US-12627078-B2

Abstract

An antenna module according to an embodiment of the present invention comprises: a substrate that includes a ground portion and a dielectric portion; a first antenna that has a length corresponding to a first frequency band and is located on one side of a first edge of the substrate; a second antenna that has a length corresponding to a second frequency band and is located on one side of a second edge of the substrate; and a stub that is located on the one side of the first edge or the one side of the second edge so as to be between the first antenna and the second antenna. The stub is spaced a first distance from the first antenna and spaced a second distance from the second antenna, wherein the first distance and the second distance are set on the basis of a first wavelength band and a second wavelength band which correspond to the first frequency band and the second frequency band.

Inventors

Chan Woo Yang
Jeong Su Park
Jung Hun OH

Assignees

LG INNOTEK CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20220531
Priority Date: 20210531

Claims (8)

1 . An antenna module comprising: a substrate including a ground portion and a dielectric portion; a first antenna formed to have a length corresponding to a first frequency band, and disposed on one side of a first edge of the substrate; a second antenna formed to have a length corresponding to a second frequency band, and disposed on one side of a second edge of the substrate; and a stub disposed on the one side of the first edge or the one side of the second edge between the first antenna and the second antenna, wherein the stub is disposed to be spaced apart from the first antenna by a first distance and is disposed to be spaced apart from the second antenna by a second distance, wherein the first distance and the second distance are respectively set on a basis of a first wavelength band and a second wavelength band corresponding to the first frequency band and the second frequency band, respectively, wherein the stub is disposed on the dielectric portion and connected to the ground portion, and wherein the first distance is configured to be ½ times a wavelength within the first wavelength band.
2 . The antenna module of claim 1 , wherein the first antenna and the second antenna are disposed on the dielectric portion.
3 . The antenna module of claim 1 , wherein the first frequency band and the second frequency band are identical.
4 . The antenna module of claim 1 , wherein the first distance is a distance from a first point, which is a center of a region where the first antenna and an edge of the ground portion intersect, to a second point, which is a center of a region where the stub and the ground portion intersect.
5 . The antenna module of claim 1 , wherein the second distance is a distance from a third point, which is a center of a region where the second antenna and an edge of the ground portion intersect, to a second point, which is a center of a region where the stub and the ground portion intersect.
6 . The antenna module of claim 1 , wherein the first distance is configured to be ⅛ to 1 times a wavelength within the first wavelength band.
7 . The antenna module of claim 1 , wherein the first distance is configured to be ⅛ to ⅞ times a wavelength within the first wavelength band.
8 . The antenna module of claim 1 , wherein the first distance is configured to be ¼ to ¾ times a wavelength within the first wavelength band.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is the U.S. national stage application of International Patent Application No. PCT/KR2022/007729, filed May 31, 2022, which claims the benefit under 35 U.S.C. § 119 of Korean Application No. 10-2021-0069899, filed May 31, 2021, the disclosures of each of which are incorporated herein by reference in their entirety. TECHNICAL FIELD An embodiment relates to an antenna module. BACKGROUND ART Generally, studies have been conducted to improve the performance of an antenna device in a communication terminal. This is because the antenna device in the communication terminal is actually responsible for transmitting and receiving signals. Accordingly, a multiple-input multiple-output (MIMO) antenna device has been recently proposed as an antenna device mounted in a communication terminal. In this case, the MIMO antenna device includes a plurality of antenna elements. By transmitting and receiving signals in a predetermined frequency band through the antenna elements in such a MIMO antenna device, it is possible to access various communication networks. However, when the above-described MIMO antenna device operates, there is a problem in that electromagnetic coupling between the antenna elements occurs, resulting in deterioration of the performance of the communication terminal. In order to reduce mutual interference between antennas, a method such as adjusting a separation distance between antenna elements, inserting a decoupling circuit, designing a suspended line, or the like is also used. However, in the case of separation distance adjustment, a problem arises in that antenna design miniaturization becomes difficult. In the cases of decoupling circuit insertion and suspended line design, a problem arises in that only narrow-band frequencies are available, and thus it is difficult to apply the cases to a multi-band and a broad-band (for example, ultra-wideband (UWB)) system. Accordingly, a method of suppressing electromagnetic mutual coupling between antenna elements in the MIMO antenna device is required. DISCLOSURE Technical Problem An embodiment is directed to providing an antenna module capable of improving the degree of isolation between a plurality of antennas included in the antenna module. The problems to be solved by the embodiment are not limited thereto, and purposes or effects which may be grasped from solutions or embodiments of the problems to be described below are also included. Technical Solution An antenna module according to an embodiment of the present invention includes: a substrate including a ground portion and a dielectric portion; a first antenna formed to have a length corresponding to a first frequency band, and disposed on one side of a first edge of the substrate; a second antenna formed to have a length corresponding to a second frequency band, and disposed on one side of a second edge of the substrate; and a stub disposed on the one side of the first edge or the one side of the second edge between the first antenna and the second antenna, wherein the stub is disposed to be spaced apart from the first antenna by a first distance and is disposed to be spaced apart from the second antenna by a second distance, and the first distance and the second distance are set on the basis of a first wavelength band and a second wavelength band corresponding to the first frequency band and the second frequency band. The first antenna and the second antenna may be disposed on the dielectric portion. The stub may be disposed on the dielectric portion, and connected to the ground portion. The first frequency band and the second frequency band may be the same frequency band. The first distance may be a distance from a first point, which is a center of a region where the first antenna and an edge of the ground portion intersect, to a second point, which is a center of a region where the stub and the ground portion intersect. The second distance may be a distance from a third point, which is a center of a region where the second antenna and an edge of the ground portion intersect, to a second point, which is a center of a region where the stub and the ground portion intersect. The first distance may be ⅛ to 1 times the first wavelength band. The first distance may be ⅛ to ⅞ times the first wavelength band. The first distance may be ¼ to ¾ times the first wavelength band. The first distance may be ½ times the first wavelength band. An antenna module according to an embodiment of the present invention includes: a substrate including a ground portion and a dielectric portion; a first antenna formed to have a length corresponding to a first frequency band, and disposed on one side of a first edge of the substrate; a second antenna formed to have a length corresponding to a second frequency band, and disposed on one side of a second edge of the substrate; and a stub disposed on the one side of the first edge or the one side of the second edge between the