Title :
Self-biasing circulators operating at Ka-band utilizing M-type hexagonal ferrites
Author :
Zeina, N. ; How, H. ; Vittoria, C. ; West, R.
Author_Institution :
Northeastern Univ., Boston, MA, USA
fDate :
9/1/1992 12:00:00 AM
Abstract :
The authors report on the fabrication and testing of millimeter-wave microstrip/stripline Y-junction circulator operating at Ka band. By exploiting the properties of high-anisotropy magnetic field, external magnetic field requirements are reduced. The design of microstrip/stripline circulators involves calculations of the radius of the ferrite disks and the port suspension angles in terms of the microstrip dielectric constant and saturation magnetization of the ferrite material. In addition, the operation frequency is determined largely by the uniaxial anisotropy field of the barium-strontium hexagonal ferrite
Keywords :
barium compounds; circulators (microwave); ferrite devices; ferrites; microstrip components; strip line components; strontium compounds; Ba1-xSrxFe12O19; EHF; Ka-band; M-type hexagonal ferrites; Y-junction circulator; external magnetic field requirements; fabrication; ferrite disc radius; high-anisotropy magnetic field; microstrip circulators; microstrip dielectric constant; operation frequency; port suspension angles; saturation magnetization; self-biasing circulators; stripline circulators; testing; uniaxial anisotropy field; Automatic testing; Circulators; Fabrication; Ferrites; Magnetic fields; Magnetic levitation; Magnetic materials; Magnetic properties; Microstrip; Stripline;
Journal_Title :
Magnetics, IEEE Transactions on
