Boots – shoes – and leggings
Patent
1995-02-24
1998-01-13
Teska, Kevin J.
Boots, shoes, and leggings
G06F 1750
Patent
active
057085870
ABSTRACT:
A method to design and analyze distributed microwave circuit elements is presented for design work, the invention can be used to match impedance between microwave circuit elements, and in the design of filters can specifically be used for, but is not limited to the design of microwave stripline or microstrip equivalent elements. This method adapts an optical design tool known as the Optical Admittance Diagram (OAD) for the analysis and design of microwave circuits and/or components (MC), such as microstrip, stripline etc. by: defining the physical MC in terms of equivalent which is transformed into an equivalent continuous transmission line known as a microwave transformer circuit which is made up quarter wave segments which are then transformed (by defining impedances as normalized optical admittances) into equivalent quarter wave optical thin film layers which make up a stack (EOTFS) whose characteristic design parameters and performances are determined by observing the plotted EOTFS on the OAD and then modifying plotted values to achieve the desired characteristic design parameters and then; performing a reverse transformation by transforming said EOTFS back into said equivalent microwave transformer (made up of said series impedance quarter wave segments) which is then transformed into parallel components as necessary to transform back into the MC which is then; physically constructed using automatic photo-etching techniques and machining techniques for fabrication of aluminum plates to house the photo-etched circuit and connectors for testing on a microwave network analyzer to verify design results.
REFERENCES:
Chen, "Transmission Line & Microwave Circuit Design using Dragon Wave", Proc. Frontiers in Education, 1991, p. 759.
Dearholt et al., Electromagnetic Wave Propagation, McGraw-Hill, Inc., 1973, pp. 299-327.
Koo et al., "Optimum Combination of Series & Parallel Immittances for Broadband Lossy Match Amplifier", China 1991 Int 3 l Conf. on Ckts. & Sys., pp. 482-485.
MacLeod, Thin-Film Optical Filters, Macmillan Publishing Company, pp. 54-57, 62-67, (no date).
Zhu et al., "Mixed Lumped & Distributed Network Applied to Superconducting Thin-Film Broadband Impedance Transforming," 1991 IEEE MTT-S Digest, pp. 635-638.
Compton et al., "An Alternative Approach for Designing Microwave Circuits Using a Personal Computer," A P-S Int'l Symposium 1988, pp. 6-9.
Smilowitz, "Development of a Microwave Design Program for Undergraduate Engineering," 1989 IEEE Frontiers in Education Conference Proceedings, pp. 158-163.
Franck Charmaine C.
Franck Jerome B.
McLeod Angus
Auton William G.
Garbowski Leigh Marie
Teska Kevin J.
The United States of America as represented by the Secretary of
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