Meandered slit antenna

• US 20060284777A1
• Filed: 09/19/2005
• Published: 12/21/2006
• Est. Priority Date: 06/20/2005
• Status: Active Grant

• Current Assignee: Ohsung Electronics Company Limited (Ohsung Co., Ltd.)
• Original Assignee: Ohsung Electronics Company Limited (Ohsung Co., Ltd.)
• Inventors: Kim, Ui Jung, Lee, Young Soon, Cha, Han Chil
• Granted Patent: US 7,375,697 B2
• Time in Patent Office: Days
• US Class Current: 343/767
• CPC Class Codes: G06K 19/07771 the record carrier comprising means for minimising adverse effects on the data communication capability of the record carrier, e.g. minimising Eddy currents induced in a proximate metal or otherwise electromagnetically interfering object
• CPC Class Codes: H01Q 1/2208 associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems methods or arrangements for sensing record carriers, e.g. for reading patterns G06K7/00; record carrier for use with machines and with at least a part designed to carry digital markings G06K19/00
• 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 13/10 Resonant slot antennas

Abstract

A meandered slit antenna is provided. The meandered slit antenna includes: a printed circuit board; an RF module mounted on the printed circuit board to generate a predetermined electric signal; a microstrip feed line connected with the RF module to transmit the predetermined electric signal; and a slot part for radiating an electromagnetic wave induced by the electric signal that is transmitted through the microstrip feed line, the slot part being formed in a meandered shape.

Claims

1. A meandered slit antenna comprising:

a printed circuit board;

an RF module mounted on the printed circuit board to generate a predetermined electric signal;

a microstrip feed line connected with the RF module to transmit the predetermined electric signal; and

a slot part for radiating an electromagnetic wave induced by the electric signal that is transmitted through the microstrip feed line, the slot part being formed in a meandered shape.

2. The meandered slit antenna according to claim 1, wherein the slot part is mounted on a ground plane of the printed circuit board.

3. The meandered slit antenna according to claim 1, wherein the printed circuit board having the slot part is used as an RFID (radio frequency identification) tag.

4. The meandered slit antenna according to claim 1, wherein both ends of the slot part are open on the printed circuit board.

5. The meandered slit antenna according to claim 1, wherein the microstrip feed line runs up to about a middle of the slot part.

6. The meandered slit antenna according to claim 1, wherein the slot part is formed on a ground plane and is mounted at a predetermined distance from the RF module.

7. The meandered slit antenna according to claim 1, wherein at least two printed circuit boards having the slot part are stacked one another.

8. The meandered slit antenna according to claim 7, wherein a direction of a main slit in a slot part of a lower antenna is parallel to a main slit in a slot part of an upper antenna, and a direction of a main lobe of an electromagnetic wave induced by the slot parts is identical to the direction the main slit.

9. The meandered slit antenna according to claim 7, wherein the slot parts mounted on the printed circuit board are stacked perpendicularly each other, and directions of main lobes of electromagnetic waves radiated by the slot parts are respectively dissimilar.

10. A meandered slit antenna comprising:

a printed circuit board;

an RF module mounted on the printed circuit board to generate a predetermined electric signal;

a microstrip feed line connected with the RF module to transmit the predetermined electric signal; and

a multiple slot part for radiating an electromagnetic wave induced by the electric signal that is transmitted through the microstrip feed line, the multiple slot part having main slits and sub slits, the main slit being continuously connected with the sub slit alternatively.

11. The meandered slit antenna according to claim 10, wherein the main slit is extended longer than the sub slit with a predetermined length.

12. The meandered slit antenna according to claim 10, wherein the multiple slot part is mounted on a ground plane of the printed circuit board.

13. The meandered slit antenna according to claim 10, wherein the printed circuit board having a multiple slot part is used as an RFID tag.

14. The meandered slit antenna according to claim 10, wherein the main slit is mounted on both ends of the multiple slot part and is open on the printed circuit board.

15. The meandered slit antenna according to claim 10, wherein the slot part is formed on a ground plane of the printed circuit board and is mounted at a predetermined distance from the RF module.

16. The meandered slit antenna according to claim 10, wherein at least two printed circuit boards having the multiple slot part is stacked one another.

17. The meandered slit antenna according to claim 16, wherein a direction of a main slit of a multiple slot part in a lower antenna is parallel to a main slit of a multiple slot part in an upper antenna, and a direction of a main lobe of an electromagnetic wave induced by the slot parts is identical to the direction.

18. The meandered slit antenna according to claim 16, wherein the multiple slot part mounted on the printed circuit board are stacked perpendicularly each other, and a direction of a main lobe of an electromagnetic wave radiated by the multiple slot part is respectively dissimilar.

19. A meandered slit antenna comprising:

a printed circuit board having different regional thicknesses;

an RF module mounted on the printed circuit board to generate a predetermined electric signal;

a microstrip feed line connected with the RF module to transmit the predetermined electric signal; and

a slot part mounted on a thin portion of the printed circuit board.

20. The meandered slit antenna according to claim 19, wherein the slot part is meanderingly formed with a predetermined width and length.