PLANAR ANTENNA

• US 20080158068A1
• Filed: 11/27/2007
• Published: 07/03/2008
• Est. Priority Date: 01/02/2007
• Status: Active Grant

• Current Assignee: Delta Networks Incorporated (Delta Electronics Incorporated)
• Original Assignee: Delta Networks Incorporated (Delta Electronics Incorporated)
• Inventors: Huang, Chi-Cheng, Yang, Chia-Bin
• Granted Patent: US 7,884,774 B2
• Time in Patent Office: Days
• US Class Current: 343/700MS
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00
• CPC Class Codes: H01Q 9/0414 in a stacked or folded configuration
• CPC Class Codes: H01Q 9/0421 with a shorting wall or a shorting pin at one end of the element H01Q9/0414 takes precedence
• CPC Class Codes: H01Q 9/42 with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Abstract

The present invention provides a wireless transmit/receive unit, comprising a feeding connecting line, a first radiating line, a second radiating line, a third radiating line and a fourth radiating line, wherein the third radiating line is longer than the first radiating line and the first radiating line is longer than the second radiating line that provides different current paths for getting a broader bandwidth. The first, second and third radiating lines are connected parallel for enhancing an antenna pattern being perpendicular thereto, and form a series capacity between the first and the third radiating lines. The fourth radiating line vertically connects between the third radiating line and a grounding line for forming a grounding capacity. The printed antenna can be reduced in size by the effect of the two capacities. The wireless transmit/receive unit can provide a better isolation with others by the direction enforced pattern and the reduced size.

Claims

1. A wireless transmitting/receiving unit, comprising:

a first radiating segment transmitting/receiving a first directional radio wave perpendicular thereto;

a second radiating segment connected to the first radiating segment for transmitting/receiving the first directional radio wave; and

a third radiating segment connected to the second radiating segment for transmitting/receiving the first directional radio wave,

wherein the length of the first radiating segment is longer than that of the second radiating segment, and the length of the third radiating segment is longer than that of the first radiating segment.

2. A wireless transmitting/receiving unit claimed as claim 1, further comprising a feeding segment perpendicularly connected to the first radiating segment for transmitting a feeding signal.

3. A wireless transmitting/receiving unit claimed as claim 1, wherein the first, the second and the third radiating segments are parallel to one another.

4. A wireless transmitting/receiving unit claimed as claim 1, wherein the second radiating segment provides various current pathways and a first gap between the first and the third radiating segments, the variety current pathways is used for increasing a transmitting/receiving band width, and the first gap is used for generating a serial capacitance to form a relatively low frequency so as to reduce a required length of the radiating segments.

5. A wireless transmitting/receiving unit claimed as claim 1, further comprising a fourth radiating segment perpendicularly connected to the third radiating segment and a grounding segment for transmitting/receiving a second directional radio wave and providing a second gap therebetween, wherein the second directional radio wave is perpendicular to the fourth radiating segment, the second gap is used for generating a grounding capacitance to form a relatively low frequency so as to reduce a required length of the radiating segments.

6. A multi-input/multi-output antenna, comprising:

a circuit board, comprising;

at least one transmitting/receiving unit set having two identical transmitting/receiving units symmetrically configured on both sides of the circuit board, wherein each transmitting/receiving unit comprises;

a first radiating segment transmitting/receiving a first directional radio wave perpendicular thereto;

a second radiating segment connected to the first radiating segment for transmitting/receiving the first directional radio wave; and

a third radiating segment connected to the second radiating segment for transmitting/receiving the first directional radio wave,

wherein the length of the first radiating segment is longer than that of the second radiating segment, and the length of the third radiating segment is longer than that of the first radiating segment.

7. The A multi-input/multi-output antenna claimed as claim 6, wherein the circuit board is a FR-4 board.

8. A multi-input/multi-output antenna claimed as claim 6, further comprising an omni-directional transmitting/receiving unit configured on a front end of the circuit board.

9. A multi-input/multi-output antenna claimed as claim 6, wherein a number of the transmitting/receiving units is even.

10. A multi-input/multi-output antenna claimed as claim 6, wherein the first, the second and the third radiating segments are parallel to one another.

11. A multi-input/multi-output antenna claimed as claim 6, further comprising a feeding segment perpendicularly connected to the first radiating segment for transmitting a feeding signal.

12. A multi-input/multi-output antenna claimed as claim 6, wherein the second radiating segment provides various current pathways and a first gap between the first and the third radiating segments, the current pathways are used for increasing a transmitting/receiving band width, and the first gap is used for generating a serial capacitance to form a relatively low frequency so as to reduce a required length of the radiating segments.

13. A multi-input/multi-output antenna claimed as claim 6, further comprising a fourth radiating segment perpendicularly connected to the third radiating segment and a grounding segment for transmitting/receiving a second directional radio wave and providing a second gap therebetween, wherein the second directional radio wave is perpendicular to the fourth radiating segment, and the second gap is used for generating a grounding capacitance to form a relatively low frequency so as to reduce a required length of the radiating segments.

14. A wireless transmission device comprising the multi-input/multi-output antenna as claimed in claim 6.

15. A directional antenna, comprising:

a first radiating segment having a first and a second surfaces for transmitting/receiving a first directional radio wave perpendicular thereto;

a second radiating segment having a third and a fourth surfaces for transmitting/receiving the first directional radio wave; and

a connecting device connected between the second surface of the first radiating segment and the third surface of the second radiating segment,

wherein the length of the second radiating segment is longer than that of the first radiating segment.

16. A directional antenna claimed as claim 15, further comprising a feeding segment perpendicularly connected to the first radiating segment for transmitting a feeding signal.

17. A directional antenna claimed as claim 15, wherein the first, the second, the third and the fourth surfaces radiating segments are parallel to one another.

18. A directional antenna claimed as claim 15, wherein the connecting device is a third radiating segment having a length shorter than that of the first radiating segment.

19. A directional antenna claimed as claim 18, wherein the third radiating segment provides various current pathways and a first gap between the first and the second radiating segments, the current pathways are used for increasing a transmitting/receiving band width, and the first gap is used for generating a serial capacitance to form a relatively low frequency so as to reduce a required length of the radiating segments.

20. A directional antenna claimed as claim 15, further comprising a fourth radiating segment perpendicularly connected to the second radiating segment and a grounding line for transmitting/receiving a second directional radio wave and providing a second gap therebetween, wherein the second directional radio wave is perpendicular to the fourth radiating segment, and the second gap is used for generating a grounding capacitance to form a relatively low frequency so as to reduce a required length of the radiating segments.