Abstract
The electronically steerable phased array radars (PARs) are finding extensive use in military, communication and civilian applications. A PAR system typically comprises a regular arrangement of a large number of phase controlled radiating elements. Ferrite-based phase shifters in various designs are employed in these systems operating at frequencies above 5 GHz due to their superior power rating and insertion loss characteristics. Under DRDO’s integrated missile programme considerable success has been achieved in the country on the development of ferrite materials, phase shifters and array system.
The work done at SSPL on the development of ferrite materials for both X- and C-band phase shifters is described. The effect of various substituents in the chemical composition of the lithium-titanium ferrites and of the process parameters to evolve the grades with required magnetic, electrical and microstructural properties are discussed. The investigations carried out to enhance optimally the r.f. power handling capability of the material for meeting the desired specifications of the C-band phase shifter are also given.
Similar content being viewed by others
References
Bullock C 1982 Military surveillance radar, Intervania 7
Baba P Det al 1972Trans. IEEE MAG-8 83
Boyd C R Jr 1970IEEE Trans. MTTT-18 1119
Boyd C R Jr 1976IEEE MTT-S Int. microwave symp. digest
Boyd C R Jr 1990Proc. I. Comm-90 429
Curtis D S 1986Introduction to electronic warfare (Dedham: Artech House)
Dionne G F 1975Proc. IEEE 63 777
Dionne G F 1985J. Appl. Phys. 57 3727
Fox A G 1947Proc. IRE 35 1489
Koul S K and Bhat B 1991Microwave and millimeter wave phase shifters (Boston and London: Artech House) Vol. 1
Pran Kishan 1993a Microwave lithium ferrites, inMicrowave materials (eds) V R K Murthy, S Sundaram and B Viswanathan (New Delhi: Narosa Publishing House)
Pran Kishan 1993b High power microwave ferrites, inRecent advances in microwaves (ed.) G P Srivastava (New Delhi: Narosa Publishing House)
Pran Kishanet al 1985Adv. Ceram. 15 207
Rosenbaum F J 1983Microwave Systems Design Handbook (Palo Alto: EW Communications) p. 153
Truehaft M A and Silber L M 1958Proc. IRE 48 1538
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kishan, P. Microwave ferrites for phase shifters. Bull. Mater. Sci. 18, 679–692 (1995). https://doi.org/10.1007/BF02744804
Issue Date:
DOI: https://doi.org/10.1007/BF02744804