Importance

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Abstract

This invention concerns an antenna system for the transmission and reception of radio waves for, typically, cellular radio communication. The antenna is, ideally, formed on a vehicle window and is so designed to enable minimum obstruction to viewing through the window and to provide excellent electrical impedance matching between the antenna and connecting coaxial cable. Several embodiments are disclosed, however, the essential design comprises two closely located conducting members to which electrical connection is made, located on the window. The first conducting member is 'V'-shaped with each leg of the 'V' being equivalent in length to .lambda./4. The angle between the two arms of the 'V' are carefully selected as is the angle between the arms and the edge of the window. The apex of the 'V' points towards the edge of the window and an intervening second electrical conductor which is parallel to the edte of the window. Electrical connection is made to the two conductors at points at the apex of the 'V' on the first conductor and immediately opposite the apex of the 'V' on the second conductor. The second conductor projects 1/4 +n/2 wavelengths each side of the connection point, where n is a positive integer (including zero).

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First Claim