Broadband antenna

• US 20070290928A1
• Filed: 09/20/2006
• Published: 12/20/2007
• Est. Priority Date: 05/19/2006
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Chang, Chih-Chen, Lo, Yung-Chin
• Granted Patent: US 7,589,675 B2
• Time in Patent Office: Days
• US Class Current: 343/700.0MS
• CPC Class Codes: G06K 19/07786 the antenna being of the HF type, such as a dipole
• CPC Class Codes: H01Q 1/2225 used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
• 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 5/371 Branching current paths

Abstract

A broadband antenna includes a coupling loop and a number of radiation bodies. The coupling loop is electrically coupled to a chip and the chip records several pieces of data. The radiation bodies respectively form a number of resonance loops with the coupling loop for providing a number of resonance frequencies of the broadband antenna. The coupling loop can feed in signals for reading data in the chip according to the resonance frequencies.

Claims

1. A broadband antenna, comprising:

a coupling loop, having a first feed-in terminal and a second feed-in terminal;

a first radiation body, forming a first resonance loop with the coupling loop for providing a first resonance frequency of the broadband antenna; and

a second radiation body, forming a second resonance loop with the coupling loop for providing a second resonance frequency of the broadband antenna;

wherein the coupling loop can feed in signals according to the first resonance frequency and the second resonance frequency.

2. The broadband antenna according to claim 1, wherein the coupling loop is separated from the first radiation body and the second radiation body.

3. The broadband antenna according to claim 1, wherein the coupling loop is connected to the first radiation body and the second radiation body.

4. The broadband antenna according to claim 1, wherein the first radiation body is connected to the second radiation body.

5. The broadband antenna according to claim 4, wherein the first radiation body is a main body and the second radiation body comprises two L-shaped bodies respective symmetrically connected to two ends of the first radiation body as branches.

6. The broadband antenna according to claim 1, wherein the first radiation body is separated from the second radiation body.

7. The broadband antenna according to claim 6, wherein the first radiation body and the second radiation body are disposed in parallel at two opposite sides of the coupling loop.

8. The broadband antenna according to claim 1, wherein the first radiation body and the second radiation body are antennas of an arbitrary type.

9. The broadband antenna according to claim 1, is a tag antenna.

10. The broadband antenna according to claim 1, wherein the first feed-in terminal and the second feed-in terminal of the coupling loop are electrically coupled to a chip and the chip records data.

11. A broadband antenna, comprising:

a coupling loop, having a first feed-in terminal and a second feed-in terminal; and

more than two radiation bodies, respectively forming a plurality of resonance loops with the coupling loop for providing a resonance frequency corresponding to each of the radiation bodies;

wherein the coupling loop feeds in signals according to the resonance frequencies.

12. The broadband antenna according to claim 11, wherein the coupling loop is separated from the radiation bodies.

13. The broadband antenna according to claim 11, wherein the coupling loop is connected to the radiation bodies.

14. The broadband antenna according to claim 11, wherein the radiation bodies are connected to each other.

15. The broadband antenna according to claim 14, wherein one of the radiation bodies is a main body, the other radiation bodies are connected in series to each other and form two brush-shaped bodies symmetrically connected to two ends of the main body as branches.

16. The broadband antenna according to claim 15, wherein each of the other radiation bodies comprises two L-shaped bodies.

17. The broadband antenna according to claim 15, wherein the radiation bodies are separated from each other.

18. The broadband antenna according to claim 11, wherein the radiation bodies are antennas of an arbitrary type.

19. The broadband antenna according to claim 11, is a tag antenna.

20. The broadband antenna according to claim 11, wherein the first feed-in terminal and the second feed-in terminal of the coupling loop are electrically coupled to a chip and the chip records data.