Patent ID: 6421015
Filing Date: 2002-07-16
Classification: H01Q

Abstract:
A planar, dual frequency helix antenna comprising:a) a single electric circuit board having opposite first and second surfaces; b) a plurality of spaced apart first microstrip antenna sections on the first surface of the electric circuit board, each first microstrip antenna sections having a first width and being inclined in a first direction, the first microstrip antenna sections being spaced apart a first distance approximately four times the first width; and, c) a plurality of spaced apart second microstrip antenna sections on the second surface of the electric circuit board, each second microstrip having a second width and being inclined in a second direction different than the first direction, the second microstrip antenna sections being spaced apart a second distance approximately four times the second width whereby at least one end of each first microstrip antenna is connected to an end of a second microstrip antenna through a hole passing through the electric circuit board.