MOBILE TERMINAL WITH ANTENNA TO TUNE A RESONANCE FREQUENCY BAND AND OPERATING METHOD THEREOF

• US 20130122828A1
• Filed: 11/15/2012
• Published: 05/16/2013
• Est. Priority Date: 11/16/2011
• Status: Abandoned Application

• Current Assignee: Pantech Corporation (Ideahub, Inc.)
• Original Assignee: Pantech Corporation (Ideahub, Inc.)
• Inventors: CHOI, Chang Ryul
• Application Number:
  US13/677,700
• Publication Number:
  US 20130122828A1
• Time in Patent Office: Days
• US Class Current: 455/77
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 5/378 Combination of fed elements with parasitic elements
• 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 1/3827 Portable transceivers

Abstract

A mobile terminal including an antenna to change an operating frequency band includes a sub-resonance generator that generates a sub-resonance to shift the operating frequency band. The sub-resonance generator may be electrically or physically connected to a main antenna of the mobile terminal. The sub-resonance generator is connected to at least one impedance matcher and switch, and the opening and closing of the switch results in the generation of the sub-resonance. A sub-resonance generated in a higher frequency band than a first frequency band of the antenna device may result in the shift to a third frequency band with a main resonance at a lower frequency than the main resonance of the first frequency band and vice versa.

Claims

1. A mobile device, comprising:

a main antenna unit to transmit and receive signals in a first frequency band; and

a sub-resonance generator with a changeable length to modify the first frequency band;

wherein if the sub-resonance generator is operated, the first frequency band is shifted to a second frequency band in which signals are transmittable and receivable.

2. The mobile device of claim 1, further comprising:

a first impedance matcher connected to the sub-resonance generator; and

a first switch connected to the first impedance matcher,

wherein the opening or closing of the first switch changes the length of the sub-resonance generator, and at least one of an inductance value or a capacitance value of the antenna device.

3. The mobile device of claim 2, wherein the main antenna unit comprises a high band radiator and a low band radiator.

4. The mobile device of claim 2, wherein the sub-resonance generator is physically connected to the main antenna unit.

5. The mobile device of claim 4, wherein the sub-resonance generator is directly connected to the main antenna unit.

6. The mobile device of claim 2, wherein the sub-resonance generator is electrically coupled to the main antenna unit without being physically connected to the main antenna unit.

7. The mobile device of claim 2, further comprising:

a signal feeding unit to provide a signal to the main antenna unit.

8. The mobile device of claim 3, wherein the sub-resonance generator is physically connected to at least one of the low band radiator and the high band radiator of the main antenna unit.

9. The mobile device of claim 3, wherein the sub-resonance generator is electrically coupled to at least one of the low band radiator and the high band radiator of the main antenna unit without being connected to the antenna unit.

10. The mobile device of claim 2, further comprising:

a second impedance matcher connected to the sub-resonance generator; and

a second switch connected to the second impedance matcher,

wherein the closing of the second switch increases the length of the sub-resonance generator.

11. The mobile device of claim 10, wherein the first impedance matcher and the second impedance matcher are connected to the sub-resonance generator in parallel.

12. A method for transmitting and receiving a signal in a mobile device, comprising:

generating a first main resonance in a first frequency band;

generating a sub-resonance in a second frequency band to shift the first frequency band to a third frequency band; and

transmitting and receiving a signal in the third frequency band.

13. The method of claim 12, wherein the second frequency band has a lower frequency than the first frequency band so that the third frequency band is higher than the first frequency band.

14. The method of claim 12, wherein the second frequency band has a higher frequency than the first frequency band so that the third frequency band is lower than the first frequency band.

15. The method of claim 12, wherein the second frequency band and the first frequency band overlap.

16. The method of claim 12, wherein the second frequency band and the first frequency band do not overlap.

17. The method of claim 12, wherein the second frequency band includes a low frequency band and a high frequency band.