Antenna

• US 9,997,833 B2
• Filed: 12/08/2014
• Issued: 06/12/2018
• Est. Priority Date: 12/11/2013
• Status: Active Grant

• Current Assignee: Emw Co., Ltd.
• Original Assignee: Emw Co., Ltd.
• Inventors: Lee, Kyoung Ho, Kim, Young Tae, Seong, Won Mo
• Primary Examiner(s): Levi, Dameon E
• Assistant Examiner(s): Islam, Hasan
• Application Number:
  US15/103,448
• Publication Number:
  US 20160315387A1
• Time in Patent Office: 1,282 Days
• Field of Search: 343702
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/36 Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewithH01Q1/08, H01Q1/14 take precedence
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 1/48 Earthing means; Earth screens; Counterpoises
• CPC Class Codes: H01Q 13/10 Resonant slot antennas
• CPC Class Codes: H01Q 13/106 Microstrip slot antennas patch antenna elements H01Q9/0407
• CPC Class Codes: H01Q 5/371 Branching current paths
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• CPC Class Codes: H01Q 9/14 Length of element or elements adjustable telescopic elements H01Q1/10

Abstract

An antenna using a length-adjustable slit includes a power supply line connected to a ground pad and a power supply pad for receiving a power supply signal from a PCB, the ground pad being connected to a case, a radiator formed on the case, the radiator including at least one slit having a dielectric embedded in the slit, and a plurality of switching terminals for controlling the resonant frequency of the slit.

Claims

1. An antenna comprising:

a case having at least one slit;

a ground pad connected to the case;

a power supply pad;

a power supply line connected to the ground pad and the power supply pad for receiving a power supply signal from a printed circuit board (PCB);

a radiator formed of a dielectric embedded in the at least one slit of the case, the radiator formed separately from the power supply line to be disposed on a different plane from the power supply line;

a plurality of switching terminals to control a resonant frequency of the radiator; and

a substrate formed on the case, wherein the power supply line, the power supply pad, and the ground pad are formed on the substrate.

2. The antenna of claim 1, wherein the plurality of switching terminals adjust a length of each slit.

3. The antenna of claim 1, wherein the case is formed of a metal.

4. The antenna of claim 1, wherein the power supply line is formed on the substrate to have a loop type connected to the ground pad and the power supply pad.

5. The antenna of claim 1, wherein:

the slit includes a first slit and a second slit in each of which the dielectric is embedded for radiating signals in different frequency bands; and

the plurality of switching terminals includes first and second switching terminals, which are turned on or off according to a switching control signal received from the PCB and adjust a length of the first slit, and third and fourth switching terminals, which are turned on or off according to a switching control signal received from the PCB and adjust a length of the second slit.

6. The antenna of claim 5, wherein the first slit and the second slit overlap and are connected in a predetermined area.

7. The antenna of claim 5, wherein the first slit is formed to have a loop type and included in a loop of the power supply line.

8. The antenna of claim 5, wherein the second slit has a T shape.