Lossless orthogonal beam forming network

Details Lossless orthogonal beam forming network Lossless orthogonal beam forming network

1984-07-10

1986-12-30

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a steerable array

H01Q 322, H01Q 324

Patent

active

046332596

ABSTRACT:
A six port junction (10) having relatively wide bandwidth, forms a basic building block for implementing a non-binary matrix and is comprised of a network including two 3-dB quadrature couplers (14, 16), one 4.8-dB quadrature coupler (18) and three coupled stripline transmission line fixed phase shifters (20, 22, 24) providing phase shifts of substantially -90.degree., -240.degree. and -30.degree. to provide a 120.degree. phase progression between three input ports (A, B, C). The six port junction can be combined with other like non-binary matrices or binary matrices for forming a beam forming network which is adapted to provide 2.sup.n .times.3.sup.m outputs.

REFERENCES:
patent: 3255450 (1966-06-01), Butler
patent: 3293648 (1966-12-01), Kuhn
patent: 3295134 (1966-12-01), Lowe
patent: 4123759 (1978-10-01), Hines et al.
patent: 4231040 (1980-10-01), Walker
patent: 4424500 (1984-01-01), Viola et al.
patent: 4499471 (1985-02-01), Luh
patent: 4503434 (1985-05-01), Luh
"A New Class of Broad-Band Microwave 90-Degree Phase Shifters", B. M. Schiffman, IRE Trans. on Microwave Theory and Techniques, Apr. 1958, pp. 230-237.

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