Coupler for feeding extensible transmission line

Details Coupler for feeding extensible transmission line Coupler for feeding extensible transmission line

1980-02-22

1981-07-14

Gensler, Paul L.

Wave transmission lines and networks

Coupling networks

With impedance matching

333238, 333240, H01P 508

Patent

active

042789559

ABSTRACT:
An extensible surface wave transmission line is fed through a coupler that utilizes the geometric properties of a planar ellipse. The coupler is in the form of a planar elliptical r.f. cavity with the r.f. input signal being fed to the cavity at the location of one ellipse focus point and the extensible output transmission line slidably traversing the cavity at the position of the other ellipse focus point. The elliptical eccentricity of the r.f. cavity is chosen such that the direct path between the ellipse foci is one half wavelength less than the ellipse major axis (or any indirect path-length between foci) thereby ensuring constructive addition of all input signals at the coupler output. The coupler is adapted to use in conjunction with aircraft antennas, transit and rail system applications, and electrical cable manufacturing quality control systems.

REFERENCES:
patent: 3639857 (1972-02-01), Okoshi et al.
patent: 3882418 (1975-05-01), Godard et al.
patent: 4193047 (1980-03-01), Carter et al.

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