Dual band slot antenna

• US 20020171594A1
• Filed: 01/25/2002
• Published: 11/21/2002
• Est. Priority Date: 05/17/2001
• Status: Active Grant

• Current Assignee: Wistron NeWeb Corporation (Wistron Corporation)
• Original Assignee: Wistron NeWeb Corporation (Wistron Corporation)
• Inventors: Fang, Chien-Hsing
• Granted Patent: US 6,765,538 B2
• Time in Patent Office: Days
• US Class Current: 343/767
• CPC Class Codes: H01Q 13/10 Resonant slot antennas
• CPC Class Codes: H01Q 5/378 Combination of fed elements with parasitic elements

Abstract

An antenna structure in the shape of a conducting plate for radiating and receiving electromagnetic signals and having a first opening for producing electromagnetic resonance at a first frequency band and a second opening for producing electromagnetic resonance at a second frequency band. A coaxial cable is used to feed Signals of both frequency bands to the antenna across the first opening. The first opening can be on a deflected part of the conducting plate relative to the second opening.

Claims

1. A dual band antenna for a wireless communication system, comprising:

a conducting surface for radiating and receiving electromagnetic signals and having a first cutout part and a second cutout part, said first cutout part having a length for producing electromagnetic resonance at a first frequency range, and said second cutout part having a length for producing electromagnetic resonance at a second frequency range;

a feed point connected with said conducting surface around said first cutout part for feeding signals of said first frequency range to said first cutout part and for feeding signals of said second frequency range to said second cutout part; and

a feed line connected with said conducting surface at said feed point for feeding signals to said dual band antenna.

2. The dual band antenna of claim 1, wherein said first cutout part and said second cutout part lie in the same plane of said conducting surface.

3. The dual band antenna of claim 1, wherein said first cutout part is on a deflected portion of said conducting plate relative to said second cutout part.

4. The dual band antenna of claim 1, wherein said first cutout part and said second cutout part elongate substantially in the same direction on said conducting surface.

5. The dual band antenna of claim 1, wherein said feed line is a coaxial cable.

6. The dual band antenna of claim 5, further comprising a grounding location formed on said conducting surface around said first cutout part whereby said coaxial cable is grounded.

7. The dual band antenna of claim 6 further comprising a fixation structure disposed on said conducting surface around said grounding location, said fixation structure having a recess receiving said coaxial cable for providing precise fixation and grounding of said coaxial cable.

8. The dual band antenna of claim 1, wherein said first cutout part is rectangular and said second cutout part is trapezoidal.

9. A dual band slot antenna for a wireless communication system, comprising:

a conducting plate for radiating and receiving electromagnetic signals and having a first slot and a second slot, said first slot elongating for producing electromagnetic resonance at a first frequency range, and said second slot elongating for producing electromagnetic resonance at a second frequency range;

a feed line connected with said conducting plate around said first slot for feeding signals of said first frequency range of said first slot and for feeding signals of said second frequency range of said second slot.

10. The dual band slot antenna of claim 9, wherein said first slot is on a deflected part of said conducting plate relative to said second slot.

11. An antenna structure for a wireless communication system, comprising:

a conducting plate for radiating and receiving electromagnetic signals and having a first opening and a second opening, said first opening being rectangular for producing electromagnetic resonance at a first frequency band, and said second opening being trapezoidal for producing electromagnetic resonance at a second frequency band; and

a feed line connected with said conducting plate around said first opening for feeding signals of said first frequency band of said first opening and for feeding signals of said second frequency band of said second opening.

12. The antenna structure of claim 11, wherein said first opening is on a deflected part of said conducting plate relative to said second opening.