Communications: radio wave antennas – Antennas – Slot type
Reexamination Certificate
2006-06-06
2006-06-06
Ho, Tan (Department: 2821)
Communications: radio wave antennas
Antennas
Slot type
C343S7000MS
Reexamination Certificate
active
07057568
ABSTRACT:
The invention proposes an antenna operating in two frequency bands and having two separate ports. The invention is a printed antenna with slot produced on a ground plane. Said antenna consisting of a slot1,said antenna having a first port produced by a first microstrip line2,the coupling between the first line2and the slot1being produced at a first distance L1from a closed end of the slot, and a second port produced by a second microstrip line4, the coupling between the second line4and the slot1being produced at a second distance L2from the closed end of the slot. The invention also pertains to a system of antennas which comprises at least two twin-port antennas.
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patent: 5905471 (1999-05-01), Biebl et al.
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Lo Hine Tong Dominique
Louzir Ali
Minard Philippe
Cao Huedung X.
Cromarty Brian J.
Ho Tan
Laks Joseph J.
Shedd Robert D.
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