Communications: radio wave antennas – Antennas – Slot type
Patent
1995-06-06
1997-07-22
Wimer, Michael C.
Communications: radio wave antennas
Antennas
Slot type
333114, 333116, H01Q 1318
Patent
active
056507933
ABSTRACT:
A centered longitudinal series/series coupling slot disposed between a boxed stripline and a crossed rectangular waveguide comprising a plurality of longitudinal radiating slots. The centered longitudinal series/series coupling slot is disposed orthogonal to the longitudinal radiating slots of the crossed rectangular waveguide. The centered longitudinal series/series coupling slot is longitudinally disposed along the centerline of the boxed stripline in such a way the centered longitudinal slot interacts with the stripline mode and not with the rectangular waveguide mode (TE.sub.10 mode) in the boxed stripline. As a result of this, a highly efficient standing wave (or travelling wave) feed is provided using the centered longitudinal series/series coupling slot in the boxed stripline. The centered longitudinal series/series coupling slot comprises a transverse slot in the crossed rectangular waveguide which reduces the undesirable direct higher order mode coupling between the coupling slot and adjacent radiating longitudinal shunt slots. There is a predetermined tilt angle between the centered longitudinal series/series coupling slot and the meandering boxed stripline. The amount of coupling between the boxed meandering stripline and the rectangular waveguide is controlled by the relative tilt angle between the boxed meandering stripline and the centered longitudinal series/series coupling slot. The present invention also comprises an antenna array incorporating such centered longitudinal series/series coupling slots.
REFERENCES:
patent: 4409595 (1983-10-01), Park
patent: 4429313 (1984-01-01), Muhs et al.
Frost et al., "The Excitation of Surface Waveguides and Radiating Slots by Strip-Circuit Transmission Lines", IRE Trans. on Microwave Theory and Tech., Oct. 1956, pp. 218-222.
Brown Charles D.
Denson-Low Wanda K.
Hughes Missile Systems Company
Wimer Michael C.
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