Antenna assembly and mobile terminal using same

• US 9,812,765 B2
• Filed: 03/18/2014
• Issued: 11/07/2017
• Est. Priority Date: 03/22/2013
• Status: Active Grant

• Current Assignee: AAC Technologies Pte Limited (AAC Technologies Holdings Inc.)
• Original Assignee: AAC Technologies Pte Limited (AAC Technologies Holdings Inc.)
• Inventors: Hong, Ng Guan, Siow, Tay Yew
• Primary Examiner(s): Nguyen, Hoang
• Assistant Examiner(s): KIM, JAE K
• Application Number:
  US14/217,634
• Publication Number:
  US 20140285384A1
• Time in Patent Office: 1,330 Days
• Field of Search: 343702, 343726, 343728, 343741, 343742, 343748, 343789, 343842, 343855, 343872
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 5/371 Branching current paths

Abstract

An embodiment of the present invention provides an antenna assembly and a mobile terminal. The antenna assembly includes an antenna body provided with a grounding plate and a feeding portion. The antenna body includes a radiating portion provided with an unclosed loop structure. The antenna assembly further has a metal frame. The metal frame is provided with a closed first loop portion surrounding an outer periphery of the radiating portion. An annular gap is formed between the first loop portion and the radiating portion. The antenna assembly of the present disclosure improves the product performance and makes the product appearance more aesthetic.

Claims

1. An antenna assembly for a mobile terminal, comprising:

a metal frame provided with a closed first loop portion, a second loop portion and connecting rods that connected the first loop portion with the second loop portion,

a grounding plate located between the first loop portion and the second loop portion, and fixed on the connecting rods, so that the antenna assembly is grounded via the grounding plate,

an antenna body provided with an unclosed loop structure used as a radiating portion of the antenna assembly and a T-shaped branch portion used as a feeding portion of the antenna assembly that extends vertically from an end of the radiating portion in a direction away from the radiating portion,

wherein the radiation portion is received in the first loop portion, the first loop portion surrounds an outer periphery of the radiation portion, and an annular gap is formed between the first loop portion and the radiation portion,

the T-shaped branch portion comprises a first branch strip that connects with the radiating portion and a second branch strip that extends vertically from the first branch strip toward the grounding plate, and the radiating portion and the branch portion are formed integrally, the branch portion is located between the radiating portion and the grounding plate, and the second branch strip keeps a distance from the grounding plate.

2. The antenna assembly of claim 1, wherein the first branch strip is located at the middle part of the short-axis end of the radiating portion.

3. A mobile terminal, comprising:

an antenna assembly,

an enclosure,

a lower cap cooperated with the enclosure to form a receiving space for receiving the antenna assembly,

the antenna assembly comprising;

a metal frame fixed on the enclosure, and provided with a closed first loop portion, a second loop portion located and connecting rods that connected the first loop portion with the second loop portion,

a grounding plate located between the first loop portion and the second loop portion, the grounding plate fixed on the connecting rods, so that the antenna assembly is grounded via the grounding plate,

an antenna body provided with an unclosed loop structure used as a radiating portion and a T-shaped branch portion used as a feeding portion of the antenna body that extends vertically from an end of the radiating portion in a direction away from the radiating portion,

wherein the radiation portion is received in the first loop portion, the first loop portion is surrounding an outer periphery of the radiation portion, and an annular gap is formed between the first loop portion and the radiation portion,

the T-shaped branch portion comprises a first branch strip that connects with the radiating portion and a second branch strip that extends vertically from the first branch strip toward the grounding plate, and the radiating portion and the branch portion are formed integrally, the branch portion is located between the radiating portion and the grounding plate, and the second branch strip keeps a distance from the grounding plate.

4. The mobile terminal of claim 3, wherein the first branch strip is located at the middle part of the short-axis end of the radiating portion.