Kenneth T Parsons

US Patent:

45875251, May 6, 1986

Filed:

Feb 7, 1984

Appl. No.:

6/577751

Inventors:

Kenneth M. Parsons - Treasure Island FL
Darrell L. Helms - Tucson AZ

Assignee:

E-Systems, Inc. - Dallas TX

International Classification:

H01Q 916

US Classification:

343821

Abstract:

A dipole phase shifter for use in a phased array antenna includes an insulating substrate having first and second sides. A dipole element having first and second conductive dipole arms is formed on the first side of the insulating substrate and a PIN/NIP diode pair is mounted on the second side of the insulating substrate and electrically-connected to the first and second dipole arms, respectively. A coaxial RF transmission line having a center conductor extending through the insulating substrate connects an input signal to the phase shifter. Quarter-wave transformers are connected between the center conductor and the diodes to compensate for the forward and reverse bias reactances thereof. The first and second dipole arms serve as groundplanes for the quarter-wave transformers. The center conductor also serves as a common bias line which allows forward biasing of one diode and, simultaneously, reverse biasing of the other diode.