INVESTIGATIONS OF BROADBAND FERROMAGNETIC POWER LIMITERS AND EXPANDERS AS DUPLEXING ELEMENTS FOR MICROWAVE SYSTEMS.

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Abstract:

The dispersion relationships for both the lowest order surface magnetostatic mode in a square YIG rod and the dipolar mode in a dielectric rod were calculated. It is possible to choose the dimensions of the YIG rod and the dielectric rod such that the two modes become degenerate over a range of frequency that is suitable for S-band limiter application. Furthermore, it is possible to match the transverse field configuration of these two modes. A wideband coupling from electromagnetic wave into surface magnetostatic wave can be realized, provided the coupling coefficient between the modes is frequency independent. Coupling between dielectric mode and surface magnetostatic mode was observed, in a transmission type experiment, by placing a cylindrical YIG rod between two identical SrTiO2 resonators. The coupling is strong in a narrow frequency band, due to the characteristics of the dielectric resonator. However, the experiment does confirm the possibility of exciting the lowest order surface magnetostatic mode by dielectric mode. Author

Author(s):
Young, Peter
Author Organization(s):
MICROWAVE ELECTRONICS PALO ALTO CA
Descriptive Note:
Quarterly progress rept. no. 2, 1 Sep-30 Nov 66,
Pagination:
0023

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Contract/Grant Number(s):
DA-28-043-AMC-02120(E)
Task Number(s):
1P622001A05504
Project Number(s):
DA-1P622001A055
 Subject Terms
Modernization Areas:
Microelectronics
Communities of Interest:
Advanced Electronics
Descriptor(s):
(*LIMITERS, BROADBAND), (*ELECTROMAGNETISM, FERROMAGNETIC MATERIALS), TRANSDUCERS, YTTRIUM, IRON, GARNET, RODS, DIELECTRICS, MAGNETIC PROPERTIES, STATICS, ELECTROMAGNETIC RADIATION, PROPAGATION, S BAND, STRONTIUM COMPOUNDS, TITANIUM COMPOUNDS, OXIDES, RESONATORS, WAVEGUIDES, DUPLEXERS
Field(s)/Group(s):
Electrical and Electronic Equipment, Electricity and Magnetism
Report Date:
1967 Mar 31