Title :
Magnetic loading of artificial magnetic conductors for bandwidth enhancement
Author_Institution :
Dept. of Electr. Eng., Arizona State Univ., Tempe, AZ, USA
Abstract :
A magnetically loaded artificial magnetic conductor (Mag-AMC) providing enhanced bandwidth has been developed. The design is a variation of the Sievenpiper (Ph.D. diss., UCLA Elec. Eng. Dept., 1999) "thumbtack" structure, which makes use of a low-loss, aligned, barium-cobalt hexaferrite material in the spacer layer. The design has been carefully engineered to align the high impedance and surface wave bandgap frequency bands. The demonstrated result is greater than four times improvement in bandwidth relative to a conventional structure of the same thickness. Using this Mag-AMC it is possible to build an antenna to instantaneously cover the UHF LOS frequency band in a depth of about 1.5".
Keywords :
UHF antennas; barium compounds; cobalt compounds; ferrite devices; ferrites; frequency selective surfaces; 1.5 inch; Ba/sub 3/Co/sub 2/Fe/sub 24/O/sub 41/; FSS; Mag-AMC; UHF antennas; aligned barium-cobalt hexaferrite material; bandwidth enhancement; high impedance bandgap frequency band; low-loss spacer layer; magnetically loaded artificial magnetic conductor; surface wave bandgap frequency band; thumbtack structure; Bandwidth; Conducting materials; Conductors; Design engineering; Frequency; Magnetic materials; Photonic band gap; Surface impedance; Surface waves; UHF antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2003. IEEE
Conference_Location :
Columbus, OH, USA
Print_ISBN :
0-7803-7846-6
DOI :
10.1109/APS.2003.1219268
