Wave transmission lines and networks – Long lines – Waveguide type
Patent
1989-06-12
1990-12-18
Gensler, Paul
Wave transmission lines and networks
Long lines
Waveguide type
29600, H01P 314, H01P 3123
Patent
active
049789341
ABSTRACT:
A semi-flexible double-ridge waveguide comprises a corrugated tube formed into a special dumbbell-shaped cross-section defined by parameters which are conveniently optimized to realize improved power-handling capability as well as improved attenuation and VSWR factors across extended dominant-mode operational bandwidths. The dumbbell-shaped cross-section efficiently removes the problems typically associated with the use of conventional rigid waveguide, including difficulty of installation as well as the need for precise alignment of components, by combining flexibility and ease of manufacture, even for long lengths of waveguide, through use of a continuous, uncomplicated and relatively inexpensive process.
The dumbbell-shaped cross-section is totally devoid of corners and other abrupt protrusions and is defined by a geometric equation in which specific parameters can be correlatively optiminzed to improve desired electrical properties of the waveguide. The waveguide is rendered "semi-flexible" by the provision of helical corrugations having a staggered disposition of opposing corrugation crests and troughs, whereby the breakdown air gap and, consequently, the maximum power rating is increased.
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patent: 3945552 (1976-03-01), Tobita et al.
Collado, "An Inside Look at Double-Ridge Guide", Microwaves & Rf, Jul. 1986, pp. 77-79.
Findakly et al., "Attenuation and Cut-off Frequencies of Double-Ridged Waveguides", The Microwave Journal, pp. 49-50.
Raymond Bulley, "Analysis of the Arbitrarily shaped Waveguide by Polynomial Approximation", IEEE Transactions vol. MTT 18, No. 12, Dec., 1970, pp. 1022-1028.
Gabriel Microwave Ltd., Advertisement, "Seamless Flexible & Flexible Twistable Waveguides".
Gabriel Microwave System Ltd., Advertisement, "Gabriel Double Ridge Flexible and Twistable Waveguides".
Continental Microwave & Tool Co., Inc., Advertisement, "Lets Get Flexible with Continental Flex Waveguide".
Litton Airtron, Advertisement, "Double Ridge Flexible-Twistable".
Evered and Company (Metals) Limited, Advertisement, "Azdar Double Ridged Waveguide".
Andrew Corportion
Gensler Paul
Irfan Kareem M.
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