Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1998-10-28
1999-09-14
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
H01Q 322, H01Q 324, H01Q 326
Patent
active
059529679
ABSTRACT:
The present invention provides a modeforming circuit (100). The modeforming circuit (100) includes a first matrix circuit (102) comprising an interconnected network of transmission lines (208-212) and phase shifters (216-218) that implement at least one N/2.times.N/2 identity matrix and at least one N/2.times.N/2 phase shift matrix. The first matrix circuit (102) is connected in series to a second matrix circuit (104). The second matrix circuit (104) includes an interconnected network of phase shifters that implements at least one N/2.times.N/2 phase shift matrix. The modeforming circuit (100) may further include a third matrix circuit (106) connected in series with the second matrix circuit (104). The third matrix circuit (106) includes a network of transmission lines (220-230) that reorder N inputs to N mode outputs. The first matrix circuit (102) may be implemented as a first matrix sub-circuit (108) connected in series with a second matrix sub-circuit (110) to provide even further reduced complexity. For example, the first matrix sub-circuit (108) may comprise an interconnected network of 180.degree. degree hybrids (202-206). The second matrix sub-circuit (110) may then comprise an interconnected network of phase shifters (216-218).
REFERENCES:
patent: 4231040 (1980-10-01), Walker
patent: 4633259 (1986-12-01), Hrycak
patent: 4638317 (1987-01-01), Evans
patent: 5373299 (1994-12-01), Ozaki et al.
patent: 5532700 (1996-07-01), Lockwood
patent: 5561667 (1996-10-01), Gerlach
patent: 5691728 (1997-11-01), Goetz et al.
patent: 5777579 (1998-07-01), Goetz et al.
Goetz Allan C.
Riddle, II Robert G.
Blum Theodore M.
TRW Inc.
Yatsko Michael S.
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