Communications: radio wave antennas – Antennas – Slot type
Patent
1997-12-09
2000-04-18
Wong, Don
Communications: radio wave antennas
Antennas
Slot type
343767, H01Q 1310
Patent
active
060520930
ABSTRACT:
This invention discloses a small slot antenna incorporated within a flat circuit board and having a three dimension omni-directional radiation pattern. In one embodiment, the antenna is formed as an L shaped slot along two edges of the circuit board of a miniature radio transceiver. The antenna is ideally suited for use in applications where radio frequency inventory tags (operating in the high VHF to low UHF frequency ranges of 400 to 500 mHz) are associated with items for which a high level of inventory control is required. It is important that such tags be able to communicate with vertical and horizontal polarized signals with reasonable gain. This invention features a low cost for manufacture and has application in radio communications in general wherever there is a requirement for a small transceiver with an integrated, orientation insensitive antenna.
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Peterson Patrick
Verma Vikram
Yao Nian Jing
Ho Tan
Savi Technology, Inc.
Wong Don
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