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Powder core dielectric channel waveguide

Bruno, William M. and Bridges, William B. (1994) Powder core dielectric channel waveguide. IEEE Transactions on Microwave Theory and Techniques, 42 (8). pp. 1524-1532. ISSN 0018-9480.

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A powder-filled rectangular groove in the surface of a plastic substrate has been demonstrated as a dielectric waveguide at 94 GHz. Propagation losses as low as 0.09 dB/cm were measured by direct transmission with nickel-aluminum titanate powder in a polypropylene substrate and with barium tetratitanate powder in a polytetrafluoroethylene (PTFE) substrate; values as low as 0.06 dB/cm were deduced from ring resonator measurements. Guide wavelengths measured for various combinations of guide dimensions, powders, and substrates agree within 10% with values predicted by the approximate theory of Marcatili for the E/sub 11//sup y/ mode. Effective loss tangents for the powders at 94 GHz were calculated from waveguide attenuation measurements, using Marcatili's field solutions. Ring resonators fabricated by filling a groove in a polypropylene substrate with nickel-aluminum titanate powder exhibit Q's as high as 2400 at 94 GHz in an 8 cm diameter ring. Coupling to the resonators was achieved with adjacent straight powder core channel guides as directional couplers.

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Additional Information:© 1994 IEEE. Manuscript received March 12, 1993; revised October 12, 1993. This work was supported in part by an Army Research Fellowship under Grant DAAG29-83-G-0017 and in part by Army Research under Grant DAAG29-84-K-0100.
Funding AgencyGrant Number
Army Research Office (ARO)DAAG29-83-G-0017
Army Research Office (ARO)DAAG29-84-K-0100
Issue or Number:8
Record Number:CaltechAUTHORS:20190318-145702305
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Official Citation:W. M. Bruno and W. B. Bridges, "Powder core dielectric channel waveguide," in IEEE Transactions on Microwave Theory and Techniques, vol. 42, no. 8, pp. 1524-1532, Aug. 1994. doi: 10.1109/22.297815
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:93941
Deposited By: Tony Diaz
Deposited On:18 Mar 2019 22:53
Last Modified:03 Oct 2019 20:59

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