Services from the FBH comprise e . g . prototyping of electronical and optoelectronical GaAs devices, epitaxy of GaAs-based layer systems, the development of GaAs processes, pilot series of integrated microwave circuits and laser diodes, consulting in rf measurement technology and the simulation of coplanar waveguide circuits.
22.
With 200 permanent researchers and 100 doctoral students for a total staff of more than 500, IEMN focuses on the following research area : physics of matter, nanostructures, microsystems and microtechnologies, microwave components and microelectronic circuits, RF and microwave circuits, digital communications, optoelectronics and photonic circuits, acoustic and ultrasonic sensors, microwave instrumentation.
23.
Starting with two Digital Tandem Switch ( DTS ) voice-switching systems designed specifically for them by the Collins Radio Company of Cedar Rapids, Iowa ( later a division of Rockwell International ), MCI began offering competitive circuit-switched direct-dial services using a combination of their own microwave circuits and leased circuits from AT & T made available to them from the landmark Carterfone decision.
