Author_Institution :
University of Cambridge, Mullard Radio Astronomy Observatory, Cavendish Laboratory, Cambridge, UK
Abstract :
A rapidly and remotely tuned u.h.f. circulator has been constructed. It gives excellent isolation over a 5 MHz bandwidth, the centre frequency of which may be fixed anywhere within a 20 MHz range merely by changing the bias voltage on a varactor diode. The 20 MHz range chosen may itself be varied over a 200 MHz range by changing the values of certain capacitors.
