Communications: radio wave antennas – Antennas – Antenna components
Patent
1998-09-29
2000-10-10
Wong, Don
Communications: radio wave antennas
Antennas
Antenna components
343909, H01Q 1508
Patent
active
061306533
ABSTRACT:
A Rotman lens (12, 13) includes a first insulating layer (26) having a high dielectric constant and a second insulating layer (46) having a low dielectric constant. Metalization provided on the first insulating layer includes a lens portion (28), and metalization provided on the second insulating layer includes a plurality of transmission lines (48) and bootlace lines (52). A plurality of via openings are provided through at least one of the insulating layers, and each contain conductive material (33, 38) which electrically couples the lens portion to a respective one of the transmission lines or bootlace lines. A number of the bootlace lines physically overlap the lens portion, without electrical engagement therewith. A ground plane (63) on a further insulating layer (61) may be provided between the first and second insulating layers, in a manner free of electrical contact with the conductive material in the via openings.
REFERENCES:
patent: 3761936 (1973-09-01), Archer et al.
patent: 4381509 (1983-04-01), Rotman et al.
patent: 4490723 (1984-12-01), Hardie et al.
patent: 4641144 (1987-02-01), Prickett
patent: 4721966 (1988-01-01), McGrath
patent: 4899164 (1990-02-01), McGrath
patent: 5495258 (1996-02-01), Muhlhauser et al.
patent: 5675345 (1997-10-01), Pozgay et al.
patent: 5936588 (1999-08-01), Rao et al.
Powers, Jr. Billy
Richards Randy J.
Nguyen Hoang
Raytheon Company
Wong Don
LandOfFree
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