Francis W Kellerman

6639558, Oct 28, 2003

Feb 6, 2002

10/068032

Francis William Kellerman - Brentwood NH
Thomas Lee Goodwin - Dracut MA

Tyco Electronics Corp. - Middletown PA

H01Q 138

343700MS, 343846

The invention is a stacked patch antenna having a plurality of patch antennas having respective operating frequency bands arranged in a stack, each antenna comprising a radiating conductive patch and a first cable comprising a plurality of coaxial conductors separated from each other by dielectric. A first conductor of the first cable carries the feed signal for the uppermost antenna and is conductively coupled to a null point of the radiating conductive patch of the uppermost antenna and passes through apertures at the null points of the other ones of the antennas in the stack. Each of the successively lower antennas in the stack is coupled to another one of the plurality of conductors of the cable, which conductors reference the other patches to ground. With this arrangement, high isolation is maintained between the frequency operating bands. Another antenna can be added between each consecutive pair of antennas discussed above, these antennas being fed by the same feed conductor as the antenna above it by parasitic coupling with the antenna above it.

59400374, Aug 17, 1999

Apr 29, 1997

8/841060

Francis William Kellerman - Brentwood NH
William Henry Harned - Kensington NH
Richard Alexander Mullins - Hampton NH

The Whitaker Corporation - Wilmington DE

H01Q 138

343700MS

A stacked patch antenna (1) is constructed with separately fed patch elements (2, 3) coupled at their respective null points with a coaxial feed (9), the coaxial feed (9) feeding a first patch element (2), a portion of the first patch element (2) connecting its null point with a natural feed point to be fed by the coaxial feed (9), and a second patch element (3) being referenced to ground by the coaxial feed (9).