Communications: radio wave antennas – Antennas – Slot type
Patent
1992-07-06
1995-08-29
Hajec, Donald
Communications: radio wave antennas
Antennas
Slot type
343767, H01Q 1310
Patent
active
054464714
ABSTRACT:
A dual cavity-backed slot antenna is provided which exhibits a relatively wide frequency bandwidth and dual resonant frequency capabilities. The antenna includes a first substrate board having a bottom conductive surface and a top surface with a conductive feedline etched thereon. A second substrate board is further included having a bottom surface which is bonded to the top surface of the first substrate board. The second substrate board has a top conductive surface with radiating slots etched thereon. First and second conductive cavities are provided which extend from the top conductive surface of the second substrate board to the bottom conductive surface of the first substrate board. Each of the first and second cavities enclose at least one of the radiating slots. By controlling the length of the radiating slots, the distance between the radiating slots and the size of the first and second conductive cavities, one may obtain wider frequency characteristics than that provided by a conventional single cavity slot antenna.
REFERENCES:
patent: 2447549 (1948-08-01), Willoughby
patent: 3312976 (1967-04-01), Gregory
patent: 3653052 (1972-03-01), Campbell et al.
patent: 3701158 (1972-10-01), Johnson
patent: 4792809 (1988-12-01), Gilbert et al.
patent: 4916457 (1990-04-01), Foy et al.
IEEE Transactions On Antennas And Propagation, vol. AP-25, No. 6, Nov. 1977 by M. R. Crews and G. A. Thiele (4 pages).
Printed Cirucit Antenna For Wide Bandwidth Requirements by Kenneth D. Arkind and Richard L. Powers Sanders Associates, Inc. (1981) (4 pages).
Chung Hsin-Hsien
Douglass Jeffrey A.
Hajec Donald
Le Hoang-anh
TRW Inc.
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