Stub Loaded Helix Antenna

A novel antenna design which exhibits performance characteristics similar to the traditional helical antenna such as gain and circular polarization. The antenna is about one third smaller in diameter and one-half as long as traditional helix antenna. The antenna is suitable for use in satellite communication systems, wireless local area networks, and the emerging personal communications systems (PCS) market.

Patent Information:

App Type	Country	Serial No.	Patent No.	File Date	Issued Date	Patent Status
US Utility	*United States	08/888,324	5,986,621	7/3/1997	11/16/1999	Issued
Foreign	Europe	98 935 538.3-1248	1 016 164	7/2/1998	9/22/2004	Issued
Foreign	Australia	84762/98	762172	7/2/1998	10/2/2003	Abandoned
Foreign	Japan	11-507,452	3959123	7/2/1998	8/15/2007	Issued
Foreign	Canada	2,295,171	2,295,171	7/2/1998	10/18/2005	Expired/Unpaid Fees
Foreign	Korea	1999-7012488	0489795	12/29/1999	5/6/2005	Issued
Foreign	China	98 8 06838.9	ZL 98 8 06838.9	1/3/2000	12/10/2003	Expired/Unpaid Fees
Foreign	Mexico	2000/000143	213475	1/3/2000	4/2/2003	Issued
Foreign	Hong Kong	01100554.7	HK 1029870	1/22/2001	9/3/2004	Expired/Unpaid Fees

Category(s):

Communication

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For Information, Contact:

Mike Miller

Senior Licensing Manager

Virginia Tech Intellectual Properties, Inc.

(540) 443-9228

mmiller@vtip.org

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