Dual band slot antenna with single feed line

Details Dual band slot antenna with single feed line Dual band slot antenna with single feed line

2001-12-13

2004-01-13

Wimer, Michael C. (Department: 2821)

Communications: radio wave antennas

Antennas

Slot type

C343S770000

Reexamination Certificate

active

06677909

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a dual band slot antenna, and in particular to a dual band slot antenna with a single feed line.
BACKGROUND OF THE INVENTION
There is a growing need for dual band antennas for use in wireless communication devices to adapt the devices to dual band operation. Referring to
FIG. 1
, a conventional dual band slot antenna comprises an antenna body
101
made from a metal foil, a first and second closed-circle slots
11
,
12
defined in the antenna body, and a first and second coaxial cables
30
,
50
electrically connecting with the antenna body
101
, wherein the first coaxial cable
30
has an inner core wire and an outer shield respectively soldered to two sides of the first slot
11
to act as a feeder of the first slot
11
, and the second coaxial cable
50
has an inner core wire and an outer shield respectively soldered to two sides of the second slot
12
to act as a feeder of the second slot
12
. With such a structure, the antenna can operate in two different frequency bands using by the two different slots
11
,
12
with the two feeders
30
,
50
.
However, since this arrangement requires two coaxial cables, such dual band slot antenna will occupy more installation space. Furthermore, the second coaxial cable adds manufacturing cost.
Hence, an improved antenna is desired to overcome the above-mentioned shortcomings of existing antennas.
BRIEF SUMMARY OF THE INVENTION
A primary object, therefore, of the present invention is to provide an improved dual band slot antenna with a single feed line to save installation space and manufacturing cost.
A slot antenna in accordance with the present invention comprises an antenna body with elongated first and second slots defined therein and a coaxial feeder cable having a conductive inner core wire and a conductive outer shield. The inner core wire is electrically connected to the antenna body at an outer side of the first slot and the outer shield is electrically connected to the antenna body at an outer side of the second slot. The coaxial cable acts as a common feed line of the first and second slots.
Other objects, advantages and novel features of the invention will become more apparent from the following detailed description of a preferred embodiment when taken in conjunction with the accompanying drawings.


REFERENCES:
patent: 6218997 (2001-04-01), Lindenmeier et al.

Affiliated with

Also associated with

Rating

Dual band slot antenna with single feed line does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dual band slot antenna with single feed line, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual band slot antenna with single feed line will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3255771