H - Electricity – 01 – Q
Patent
H - Electricity
01
Q
351/31
H01Q 13/10 (2006.01) H01Q 3/24 (2006.01) H01Q 13/18 (2006.01)
Patent
CA 1258708
- 15 - A Multidirectional Feed And Flush-Mounted Surface Wave Antenna Abstract The present invention relates to a multidirectional feed which can be used by itself or preferably incorporated within a surface wave structure to form a flush-mounted antenna on, for example, a mobile unit. The feed arrangement comprises a ground plane including an annular cavity with a smaller annular slot. The annular slot is connected by multiple, spaced-apart, leads to an associated transceiver. The annular cavity is also formed to prevent both a shorting of the radio waves therein and the radio waves from propagating away from the cavity in a direction opposite the slot. A surface wave structure is disposed preferably with the feed centrally mounted and can comprise any suitable structure including annular corrugations and/or a dielectric layer to provide a flush-mounted antenna arrangement which provides radiation in azimuth in all directions with moderate elevation gain.
516961
American Telephone And Telegraph Company
Kirby Eades Gale Baker
LandOfFree
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