Title :
Beam scanning characteristics of microstrip triangular array antenna on normally biased NiAl ferrite
Author :
Kumar, Dinesh ; Pourush, P.K.S.
Author_Institution :
Dept. of Phys., Agra Coll., India
Abstract :
A conventional 4×4 planar microstrip equilateral triangular array antenna (METAA) is designed on a NiAl biased ferrite substrate in the C-band (5 GHz) region. The antenna shows tunability in resonant frequency, bandwidth, and efficiency and radiation conductance on application of an external magnetic field normal to the plane of the array geometry. The radar cross-section (RCS) characteristics, especially the resonance behavior of the array with various bias conditions, are studied and compared to the case of an unbiased ferrite. It is investigated that the RCS can be moved with respect to frequency by changing the magnetic bias field. It is also found that magnetic losses affect the RCS at resonance significantly.
Keywords :
beam steering; circuit resonance; circuit tuning; ferrite devices; magnetic fields; microstrip antenna arrays; planar antenna arrays; radar cross-sections; 5 GHz; RCS; antenna tunability; applied external magnetic field; array resonance; beam scanning; equilateral triangular array antenna; magnetic field bias conditions; magnetic loss; microstrip array antenna; normally biased ferrite substrate; planar array antenna; radar cross section; radiation conductance; resonant frequency; Antenna arrays; Bandwidth; Ferrites; Geometry; Magnetic fields; Magnetic resonance; Microstrip antenna arrays; Microstrip antennas; Radar cross section; Resonant frequency;
Conference_Titel :
Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory, 2004. DIPED 2004. Proceedings of the 9th International Seminar/Workshop on
Conference_Location :
Tbilisi, Georgia
Print_ISBN :
966-02-3253-5
DOI :
10.1109/DIPED.2004.242802
