Spatial and Quasi-Optical Power Combining a Multidisciplinary University Research Initiative
Final rept. 5 May 1997-4 May 2003
CLEMSON UNIV SC DEPT OF ELECTRICAL ANDCOMPUTER ENGINEERING
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This MURI program comprised an integrated effort for computer aided design CAD modeling of quasi optical structures and three related experimental efforts. The CAD activity involved the electromagnetic modeling of radiation from planar structures, state-variable modeling of microwave circuits, and thermal modeling of microwave circuits. The latter two have been combined into a unified CAD system that deals with microwave circuits, including electro-thermal effects. Electromagnetic structures can be coupled to this CAD system through a y-parameter interface. A closely related experimental effort has led to an electro-optical sampling system capable of measuring all three components of electric field and the temperature at distances quite close to planar radiating structures in an essentially non-perturbing fashion. The probe is a Pockel-effect crystal affixed to the end of an optical fiber. The fiber can be supported over substantial length so that the fiber and a dielectric support for the fiber are the only materials near the device under test. A tray-architecture for quasi-optical amplifiers has been extensively studied. State of the art amplifiers have been fabricated at X and Ka bands and have been thoroughly characterized. Schemes for coupled-oscillator phased-array realizations have been investigated. The parameter space in which coupled-oscillator arrays can be suitably operated has been defined, and issues relating to practical oscillator design for coupled-oscillator arrays have been identified so that a design practice suitable to MMIC fabrication is established.
- Electrooptical and Optoelectronic Devices
- Computer Programming and Software