Characteristics of switchable ferrite microstrip antennas
- 1 January 1996
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Antennas and Propagation
- Vol. 44 (8) , 1127-1132
- https://doi.org/10.1109/8.511821
Abstract
Switchable antennas consisting of microstrip elements with an in-plane biased ferrite cover layer are introduced. Their radiation and radar cross section (RCS) properties are examined through a full-wave moment-method analysis. For microstrip antennas with a ferrite cover layer, the presence of a decaying extraordinary wave in the ferrite layer can reduce or prohibit incident fields from reaching the antenna resulting in significant RCS reduction. For antenna radiation, most of the power will be converted into magnetostatic waves and little radiates into the air. Under such circumstances, the antennas are "off," in the sense that they are effectively absent as radiators or scatterers. The aim of this paper is, through the use of an accurate full-wave analysis, to investigate the properties of the switchable microstrip antennas. Both the cases of strip dipoles and rectangular patches are analyzed. The effects of the cover-layer thickness, bias-field strength, and the existence of both ordinary and extraordinary waves on the switchable antenna properties are discussed.Keywords
This publication has 17 references indexed in Scilit:
- Scattering and radiation from finite thick slits in parallel-plate waveguideIEEE Transactions on Antennas and Propagation, 1996
- A numerical method of evaluating electromagnetic fields in a generalized anisotropic mediumIEEE Transactions on Microwave Theory and Techniques, 1995
- MM-Wave integrated phased arrays with ferrite controlIEEE Transactions on Antennas and Propagation, 1994
- Correction to "Radiation and scattering characteristics of microstrip antennas on normally biased ferrite substrates"IEEE Transactions on Antennas and Propagation, 1994
- A magnetically switchable ferrite radome for printed antennasIEEE Microwave and Guided Wave Letters, 1993
- Dipole arrays printed on ferrite substratesIEEE Transactions on Antennas and Propagation, 1993
- The RCS of a microstrip patch on an arbitrarily biased ferrite substrateIEEE Transactions on Antennas and Propagation, 1993
- Surface wave modes of printed circuits on ferrite substratesIEEE Transactions on Microwave Theory and Techniques, 1992
- Experimental studies of magnetically scannable leaky-wave antennas having a corrugated ferrite slab/dielectric layer structureIEEE Transactions on Antennas and Propagation, 1988
- Ferrites at Microwave FrequenciesPublished by Institution of Engineering and Technology (IET) ,1987