Title :
Radiation and scattering characteristics of microstrip antennas on normally biased ferrite substrates
Author_Institution :
Dept. of Electr. & Comput. Eng., Massachusetts Univ., Amherst, MA, USA
fDate :
9/1/1992 12:00:00 AM
Abstract :
Radiation and scattering characteristics of microstrip antennas and arrays printed on ferrite substrates with a normal magnetic bias field are described. The extra degree of freedom offered by the biased ferrite can be used to obtain a number of novel characteristics, including switchable and tunable circularly polarized radiation from a microstrip antenna having a single feed point, dynamic wide-angle impedance matching for phased arrays of microstrip antennas, and a switchable radar cross section reduction technique for microstrip antennas. Results are obtained from full-wave moment method solutions for single microstrip antennas and infinite arrays of microstrip antennas. A cavity model solution for a circular patch antenna on a biased ferrite substrate is also presented, to aid in understanding the operation of these antennas
Keywords :
antenna phased arrays; electromagnetic wave scattering; ferrite applications; microstrip antennas; microwave antenna arrays; radar cross-sections; substrates; RCS reduction; cavity model solution; circular patch antenna; dynamic wide-angle impedance matching; ferrite substrates; full-wave moment method solutions; infinite arrays; microstrip antennas; normal magnetic bias field; phased arrays; radiation characteristics; reduction technique; scattering characteristics; switchable radar cross section; tunable circularly polarized radiation; Antenna feeds; Ferrites; Impedance matching; Microstrip antenna arrays; Microstrip antennas; Phased arrays; Polarization; Radar antennas; Radar cross section; Radar scattering;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
