Electronic device including antenna

• US 10,396,837 B2
• Filed: 11/03/2016
• Issued: 08/27/2019
• Est. Priority Date: 11/13/2015
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Shin, Yong Joo, Van, Ju Ho, Kim, Young Ju
• Primary Examiner(s): Le, Nhan T
• Application Number:
  US15/775,507
• Publication Number:
  US 20180351589A1
• Time in Patent Office: 1,027 Days
• CPC Class Codes: H01Q 1/24 with receiving set
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 5/335 at the feed, e.g. for impedance matching
• CPC Class Codes: H01Q 5/364 Creating multiple current paths
• CPC Class Codes: H01Q 9/04 Resonant antennas
• CPC Class Codes: H01Q 9/42 with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
• CPC Class Codes: H04B 1/006 using switches for selecting the desired band H04B1/0057 takes precedence
• CPC Class Codes: H04B 1/0483 Transmitters with multiple parallel paths

Abstract

An electronic device includes an antenna including a ground part, a feeding part, and a radiator and a first switch interposed between the feeding part and the radiator. A signal supplied through the feeding part is transmitted through a first path, a second path, or a third path that connects the feeding part to the radiator. The first switch is configured to change a connection state of the second path and the third path, and the third path includes a variable capacitor.

Claims

1. An electronic device comprising:

an antenna including a ground part, a feeding part, and a radiator;

a first switch interposed between the feeding part and the radiator; and

a second switch configured to electrically connect or disconnect one point of a first path to or from the radiator,

wherein a signal supplied through the feeding part is transmitted through the first path, a second path, or a third path that connects the feeding part to the radiator,

wherein the first switch is configured to change a connection state of the second path and the third path, and

wherein the third path includes a variable capacitor.

2. The electronic device of claim 1, wherein the antenna is a multi-band antenna that transmits and receives a signal of a first band through the radiator and transmits and receives a signal of a second band through the ground part.

3. The electronic device of claim 1, wherein an electrical length or a physical length of each of the first path, the second path, and the third path, through which the signal passes, is different from each other.

4. The electronic device of claim 3, wherein the electrical length of the first path is longer than the electrical length of the second path, and

wherein the electrical length of the second path is longer than the electrical length of the third path.

5. The electronic device of claim 1, wherein electrical lengths or physical lengths of the first path, the second path, and the third path are determined based on a resonance frequency of the antenna.

6. The electronic device of claim 1, wherein an electrical length of the third path is changed depending on capacitance of the variable capacitor.

7. The electronic device of claim 1, wherein a resonance frequency of the antenna is changed depending on capacitance of the variable capacitor.

8. The electronic device of claim 1, wherein electrical lengths of the first path, the second path, the third path, and a fourth path including the second switch through which the signal passes are different from each other.

9. The electronic device of claim 8, wherein the electrical length of the first path is longer than the electrical length of the fourth path,

wherein the electrical length of the fourth path is longer than the electrical length of the second path, and

wherein the electrical length of the second path is longer than the electrical length of the third path.

10. The electronic device of claim 8, further comprising:

a controller configured to control the second switch such that the feeding part is connected to the radiator through the fourth path.

11. The electronic device of claim 1, further comprising:

a controller configured to control the first switch such that the feeding part is selectively connected to the second path or the third path.

12. The electronic device of claim 1, further comprising:

a controller configured to change capacitance of the variable capacitor.

13. The electronic device of claim 12, further comprising:

a communication processor electrically connected to the controller,

wherein the communication processor is configured to change the capacitance of the variable capacitor using the controller in consideration of a communication state of the antenna.

14. The electronic device of claim 13, wherein the communication processor is configured to change the capacitance of the variable capacitor using the controller, if a dielectric contacts the radiator.