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
For Information, Contact:
Mike Miller
Senior Licensing Manager
Virginia Tech Intellectual Properties, Inc.
(540) 443-9228
mmiller@vtip.org
Inventors:
R. Michael Barts
Warren Stutzman
Keywords:
Communications
Wireless Portfolio