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To: James Hutton who wrote (2292)	2/26/2000 6:27:00 AM
From: FLSTF97	Respond to of 10713

I don't really know much about the devices you mention but I don't think they would directly compete with Cree's devices. The ones you mention have some unique capabilities in reducing out the noise which effectively increases the range of the base stations for a given power level. That could mean that base stations become more effective with less power or conversely less base stations would be needed (not an option with increasing bandwidth demands IMO). Nevertheless SiC actually offers better performance at the high frequencies so it may still be beneficial even when lower power levels are needed. FATBOY

To: James Hutton who wrote (2292)	2/26/2000 11:28:00 AM
From: John Walliker	Read Replies (2) \| Respond to of 10713

jonathan, Are the superconducting products competitors of CREE's wireless products? No. They are complementary. CREE are developing high frequency high power transistors which can run at much higher temperatures than silicon or gallium arsenide devices. CDTS use the superconducting properties of certain materials at low temperatures to make filters with very low losses and very sharp cutoffs. This minimises the need to leave gaps between the frequencies of adjacent base stations and helps in channel re-use. The need for such gaps at present is caused by the fact that perfect filters are very difficult to make and there is some leakage of unwanted frequencies into the base station receivers. This then reduces their sensitivity to the wanted signals. John