Title :
Circulators for microwave and millimeter-wave integrated circuits
Author :
Schloemann, Ernst F.
Author_Institution :
Raytheon Co., Lexington, MA, USA
fDate :
2/1/1988 12:00:00 AM
Abstract :
The requirements for circulators for use in combination with microwave and millimeter-wave integrated circuits are reviewed, with special emphasis on modules for phased-array antennas. Recent advances in broadbanding and in miniaturization are summarized. Novel types of circulators that are fabricated by attaching a ferrite disc and a suitable coupling structure to the surface of a dielectric of semiconductor substrate (quasimonolithic integration) are described. Methods for achieving complete monolithic integration are also discussed
Keywords :
circulators (microwave); ferrite devices; microwave integrated circuits; monolithic integrated circuits; broadbanding; circulators; complete monolithic integration; coupling structure; dielectric substrate; ferrite disc; millimeter-wave integrated circuits; miniaturization; modules for phased-array antennas; quasimonolithic integration; requirements; semiconductor substrate; Circulators; Dielectric substrates; Ferrites; Insertion loss; Low-noise amplifiers; Millimeter wave integrated circuits; Phase shifters; Power semiconductor switches; Receiving antennas; Transmitting antennas;
Journal_Title :
Proceedings of the IEEE
