Communications: radio wave antennas – Antennas – Microstrip
Reexamination Certificate
1999-07-19
2001-04-10
Phan, Tho (Department: 2821)
Communications: radio wave antennas
Antennas
Microstrip
C343S767000, C343S771000, C343S853000
Reexamination Certificate
active
06215444
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to an array antenna with at least one array of multiple aerials with several planar microwave resonators in strip transmission line technique, which are connected to each other with micro strip transmission line segments.
Known antennas of this type contain features which are not adequate for many purposes, that is with respect to the antenna characteristic and increased undesirable radiation if T-junctions are present.
SUMMARY OF THE INVENTION
It is the object of the present invention to specify an array antenna of the aforementioned type, which has an improved antenna characteristic with reduced, undesirable radiation.
The above and other objects are accomplished according to the invention by the provision of an array antenna, comprising at least one array of multiple aerials with several planar microwave resonators in strip transmission line technique, which are connected to each other with micro strip transmission line segments, wherein a preferably rectangular window is provided underneath one of the microwave resonators for feeding an array of multiple aerials, which window is located in the rear metal-coating of the substrate, is covered completely by the resonator above and connects the resonator with a connecting line below the window.
REFERENCES:
patent: 4364050 (1982-12-01), Lopez
patent: 4843400 (1989-06-01), Tsao et al.
patent: 4857938 (1989-08-01), Tsukamoto et al.
patent: 5181042 (1993-01-01), Kaise et al.
patent: 5512906 (1996-04-01), Speciale
patent: 5539420 (1996-07-01), Dusseux et al.
patent: 0 447 218 A2 (1991-09-01), None
Daimler-Chrysler AG
Kinberg Robert
Phan Tho
Venable
Voorhees Catherine M.
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