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Details of Grant 

EPSRC Reference: GR/L26445/01
Title: COMPACT DISTRIBUTED FERRITE-COUPLED CIRCULATORS
Principal Investigator: Davis, Professor L
Other Investigators:
Researcher Co-Investigators:
Project Partners:
Teledyne e2v (UK) Ltd
Department: Electrical Engineering & Electronics
Organisation: UMIST
Scheme: Standard Research (Pre-FEC)
Starts: 01 October 1997 Ends: 30 September 2000 Value (£): 203,960
EPSRC Research Topic Classifications:
RF & Microwave Technology
EPSRC Industrial Sector Classifications:
Communications
Related Grants:
Panel History:  
Summary on Grant Application Form
A new type of circulator (3- or 4-port) based on ferrite-coupled lines has been developed in the Group. These 'lines' can be stripline, microstrip, slotline or coplanar waveguide. These FCL circulators have the advantage that they avoid the need for costly 'drop-in' technology; the ferrite and dielectric layers can simply be placed on top of each other, and the in-plane magnetic bias field is small even at millimetric wavelengths. Using soft substrates, ferrite slabs, and a purpose-built solenoid, 3-port and 4-port (proof-of-principle) circulators have been built for 7.4 GHz. The proposed research will investigate novel miniaturisation techniques for use at 10 GHz, permanent-magnet biasing, power handling limitations, and manufacturing techniques.
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