Wave transmission lines and networks – Coupling networks – Balanced to unbalanced circuits
Patent
1989-08-10
1991-01-29
Hille, Rolf
Wave transmission lines and networks
Coupling networks
Balanced to unbalanced circuits
333125, 333127, 343862, H03H 5000, H01Q 1050
Patent
active
049889613
ABSTRACT:
A technique and arrangement for lowering the mismatch normally obtained, thereby increasing the bandwidth, in a standard rectangular-to-coaxial waveguide "T" junction coupling in an antenna system, such arrangement including, in a T-junction of a coaxial transmission line to a waveguide transmission line in which measured impedance values in the range of approximate 30 MHz in the UHF band must be within a 1.1:1 circle of voltage standing wave ratio, the improvement which achieves minimal reflection over said range of frequencies, according to which a diconical slug is connected between an upper and lower portion of the coaxial transmission line and mounted for support within the structure of the waveguide transmission line, and in which said diconical slug includes back-to-back conical sections such that the large diameter rims of the sections confront each other.
REFERENCES:
patent: 2658145 (1953-11-01), Dorne et al.
patent: 3023381 (1962-02-01), Rowland
patent: 3086181 (1963-04-01), Lind
patent: 3239713 (1966-03-01), Evans et al.
patent: 3528041 (1970-09-01), Honda et al.
Brown Peter T.
General Signal Corporation
Hille Rolf
Hubbard Robert R.
Ohlandt John F.
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