Wave transmission lines and networks – Plural channel systems – Nonreciprocal gyromagnetic type
Patent
1987-07-01
1988-06-07
Gensler, Paul
Wave transmission lines and networks
Plural channel systems
Nonreciprocal gyromagnetic type
333238, H01P 1387
Patent
active
047499664
ABSTRACT:
A millimeter wave microstrip Y-junction circulator is provided comprising a monolithic, wye-shaped ferrite element disposed on one surface of a section of microstrip dielectric substrate having three, Y-junction oriented sections of microstrip conductor on the same one substrate surface and an electrically conductive ground plane on the opposite substrate surface. The ferrite element has a central right prism-shaped portion with two equilateral triangular-shaped prism bases and three rectangular prism faces and three downwardly-sloping arm portions which extend radially outwardly from the prism faces of the central portion. The top base of the ferrite element central portion and the top surface of the ferrite arm portions which do not rest on the substrate are provided with microstrip conductors which cooperate with the ground plane to convey millimeter wave signals applied to the three Y-junction oriented microstrip sections on the substrate to the ferrite element central portion. A permanent magnet mounted on the ground plane beneath the bottom prism base causes the ferrite element central portion to act as a circulator to selectively couple the three microstrip sections on the substrate.
REFERENCES:
patent: 3341789 (1967-09-01), Goodman et al.
patent: 3456213 (1969-07-01), Hershenov
patent: 4415871 (1983-11-01), Stern et al.
patent: 4538123 (1985-08-01), Mariani et al.
Hershenov, "X-Band Microstrip Circulator," pp. 2022-2023, Proceedings of IEEE, DEC. 1966.
Babbitt Richard W.
Stern Richard A.
Gensler Paul
Kanars Sheldon
Maikis Robert A.
The United States of America as represented by the Secretary of
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