INVESTIGATION OF MICROWAVE NON-LINEAR EFFECTS UTILIZING FERROMAGNETIC MATERIALS.
Abstract
Ferrite parametric amplification was demonstrated in Ku band with Yttrium Iron Garnet (YIG). A detailed theoretical analysis was derived which allows comparison between the ferrite amplifier and the diode amplifier. In theory, both amplifiers have similar threshold pump powers. Diode Q's are generally lower than YIG Q's. Furthermore, diode Q's decrease with increasing frequency while YIG Q's increase or at least remain constant. Off-setting this is the fact that diodes have a much larger non-linear coupling term. Furthermore, this non-linear coupling term remains constant with increasing frequency for the diode, whereas it decreases for the ferrite. Magnetodynamic mode operation is demonstrated as a useful method of operation of the ferrite amplifier, having some of the advantages, as well as disadvantages, of both the electromagnetic and magnetostatic modes of operation. Magnetodynamic operation is further broken down into three types depending on the position of the signal and idler modes relative to the Walker magnetostatic spectrum. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 16, 1965
- Accession Number
- AD0618915
Entities
People
- Lee F. Donaghey
- Roy W. Roberts Jr.