Modern u.h.f. and microwave ferrite devices

Several ferrite devices recently developed for systems applications are described. The behaviour and characteristics of extremely compact u.h.f. isolators based on new microwave techniques are reported. Faraday rotation and Y-circulators operating over wide temperature ranges and with broad frequency bandwidths are described. Also included are switches based on Faraday rotation, turnstile-junction and stripline-junction circulators. Strip and rectangular coaxial transmission-line phase shifters particularly suitable for antenna scanning applications are discussed. A discussion in terms of the intrinsic properties of ferrite materials is given that defines the frequency regions of operation for these phase shifters.