Wave transmission lines and networks – Long line elements and components – Waveguide elements and components
Patent
1985-11-27
1989-05-30
Laroche, Eugene R.
Wave transmission lines and networks
Long line elements and components
Waveguide elements and components
333262, H01P 115
Patent
active
048355003
ABSTRACT:
A transmission line comprising a multi-layer dielectric slab structure including: a dielectric substrate layer (30) having a thickness d.sub.s and permittivity .epsilon..sub.s ; a conductive ground plane (31) on the bottom surface of the dielectric substrate layer (30); a dielectric guiding layer (32) having a thickness h and permittivity .epsilon..sub.g, where .epsilon..sub.g >.epsilon..sub.s, attached to the top surface of dielectric substrate layer (30); at least one elongated and relatively narrow dielectric loading strip layer (33) having a width W, thickness d.sub.1, and permittivity .epsilon..sub.1, where .epsilon..sub.g >.epsilon..sub.l, attached to the top surface of the dielectric guiding layer (32); and a conductive coating (34) on the top surface of the dielectric loading strip layer (32). Such a structure permits single mode propagation over a relatively wide frequency band. Radiation losses due to coupling of the desired mode to the substrate modes and the conductors are furthermore reduced and the polarization of the dominant mode is such as to render said structure relatively insensitive to small deviations from parallelism among the different interfaces. This invention concerns itself with a microslab structure comprised of optically controlled switches and phase shifters.
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Chin Gay
Eisel James B.
LaRoche Eugene R.
Lee Benny T.
Martin Marietta Corporation
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