Communications: directive radio wave systems and devices (e.g. – Directive – Including antenna orientation
Patent
1994-03-25
1995-04-25
Gensler, Paul
Communications: directive radio wave systems and devices (e.g.,
Directive
Including antenna orientation
333113, 333 21R, 342363, H01Q 300, H01P 116, H01P 518
Patent
active
054103185
ABSTRACT:
In accordance with the present invention, a traveling wave coupler generates tracking signals from a circularly polarized microwave signal and includes a waveguide manifold for exciting circular TM.sub.01 and TM.sub.11 modes of said circularly polarized microwave signal. The waveguide manifold includes an input port, a propagation length, and an output port. A coupling arm waveguide includes an auxiliary input port and an auxiliary output port and is aligned and connected to the waveguide manifold along a portion of the propagation length. A coupler located between the waveguide manifold and the coupling arm transforms microwave energy of a TM.sub.01 mode of the circularly polarized microwave signal into a rectangular TE.sub.10 mode in the coupling arm waveguide. The coupling arm waveguide and the coupler generate a difference signal, used to generate the tracking signals, at the auxiliary output port related to the coupled TE.sub.10 mode.
REFERENCES:
patent: 2748350 (1956-05-01), Miller
patent: 3529205 (1970-09-01), Miller
patent: 3936838 (1976-02-01), Foldes
patent: 4367446 (1983-01-01), Hall
patent: 4420756 (1983-12-01), Hamada et al.
patent: 4566012 (1986-01-01), Choung et al.
Shiau, M. J. et al., "NASA Acts Autotrack Antenna Feed System," IEEE AP/S Symposium Digest, pp. 83-86 (Jun. 1986).
Choung, Youn H. et al., "Theory and Design of a Ku-Band TE.sub.21 -Mode Coupler," IEEE Transactions on Microwave Theory and TechniquesAbstract, vol. 30, No. 11, pp. 1862-1866 (Nov. 1982).
Chen Chun-Hong H.
Choung Youn H.
Shiau Ming-Jong
Wong William C.
Gensler Paul
TRW Inc.
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