Multi-band antenna

• US 6,734,826 B1
• Filed: 12/20/2002
• Issued: 05/11/2004
• Est. Priority Date: 11/08/2002
• Status: Expired due to Fees

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Dai, Hsin Kuo, Kuo, Chia-Ming, Lin, Hsien-Chu, Tai, Lung-Sheng
• Primary Examiner(s): Ho, Tan
• Application Number:
  US10/327,249
• Publication Number:
  US 20040090376A1
• Time in Patent Office: 508 Days
• Field of Search: 343/700.MS, 343/725, 343/741, 343/846, 343/848, 343/866
• US Class Current: 343/700.0MS
• CPC Class Codes: H01Q 1/24 with receiving set
• 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
• CPC Class Codes: H01Q 9/40 Element having extended radiating surface
• CPC Class Codes: H01Q 9/42 with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Abstract

A multi-band antenna (1) for an electronic device comprises an insulative substrate (30), a feeder cable (40) and a conductive element disposed on the substrate including a radiating portion (21), a first connecting portion (22), a second connecting portion (23) and a ground portion (10). The radiating portion includes a plurality of radiating segments (211-218). The first and second connecting portions connect the ground portion with the radiating portion. A part of the radiating portion, the second connecting portion, the ground portion and the feeder cable form a planar loop antenna. The radiating portion, the first connecting portion, the ground portion and the feeder cable form a planar inverted-F antenna.

Claims

1. A multi-band antenna adapted for use in a multi-band communication device, comprising:

an insulative substrate;

a conductive element disposed on the insulative substrate including a ground portion, a radiating portion and a first and second connecting portions for connecting the ground portion with the radiating portion; and

a feeder cable connecting to the conductive element;

wherein the ground portion, the radiating portion, the first connecting portion and the feeder cable form a planar inverted-F antenna, and the second connecting portion, a part of the radiating portion, the ground portion and the feeder cable form a planar loop antenna.

2. The multi-band antenna as claimed in claim 1, wherein the radiating portion comprises a plurality of radiating segments.

3. The multi-band antenna as claimed in claim 2, wherein the plurality of radiating segments connect in turn end to end and are each perpendicular to the other segments to which they directly connect.

4. The multi-band antenna as claimed in claim 3, wherein the feeder cable includes an inner core conductor electrically connecting to the radiating portion and an outer shield conductor electrically connecting to the ground portion.

5. A multi-band antenna assembly comprising:

an insulative substrate defining a lengthwise direction and a transverse direction perpendicular to each other;

a conductive element area formed on the substrate, said conductive area including;

a ground portion;

a multiple-deflected-segment radiating portion with one end which is spaced from a first position of the ground portion along said lengthwise direction;

one set of connecting portion connecting said radiating portion to a second position of the ground portion; and

a feed cable including an inner conductor secured to said end of the radiating portion, and an outer conductor secured to said first position.

6. The assembly as claimed in claim 5, wherein said one set of connecting portion includes first and second connecting segments with a common end connecting to said second position of the ground portion, and with two spaced opposite ends respectively connected to two different positions of a middle section of said radiating portion.

7. The assembly as claimed in claim 6, wherein said first and second connecting segments define a right angle configuration, and the middle portion intersected between said two spaced opposite ends of the first and second connecting segments also defines a complementary right angle configuration to cooperate with said right angle configuration to form a rectangle loop.

8. The assembly as claimed in claim 5, wherein said first position and said second position are opposite to each other in said transverse direction.

9. A multi-band antenna assembly comprising:

an insulative substrate defining a lengthwise direction and a transverse direction perpendicular to each other;

a conductive element area formed on the substrate, said conductive area including;

a ground portion;

a multiple-deflected-segment radiating portion with one end which is spaced from a first position of the ground portion along said lengthwise direction; and

one set of connecting portion connecting said radiating portion to a second position of the ground portion;

wherein;

said one set of connecting portion including first and second connecting segments with a common end connecting to said second position of the ground portion, and with two spaced opposite ends respectively connected to two different positions of a middle section of said radiating portion.

10. The assembly as claimed in claim 9, wherein said first and second connecting segments define a right angle configuration, and the middle portion intersected between said two spaced opposite ends of the first and second connecting segments also defines a complementary right angle configuration which cooperates with said right angle configuration to form a rectangle loop.

11. The assembly as claimed in claim 9, wherein said radiating portion defines a U-shaped contour extending from said end before intercepted by said connecting portion.

12. The assembly as claimed in claim 9, wherein said radiating portion defines an L-shaped contour extending from the other end thereof before intercepted by said connecting portion.

13. The assembly as claimed in claim 9, wherein an inner conductor of a feed cable is secured to said end.

14. The assembly as claimed in claim 13, wherein an outer conductor of said feed cable is secured to said ground portion.