DocumentCode :
1715144
Title :
Mutual coupling between reduced surface wave antennas in an array
Author :
Chen, R.L. ; Jackson, D.R. ; Williams, J.F. ; Long, S.A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Houston Univ., TX, USA
Volume :
3
fYear :
2001
Firstpage :
248
Abstract :
Reduced surface wave (RSW) antennas produce only a small amount of surface-wave and lateral-wave radiation since the surface-wave and lateral-wave radiation from the dominant TM/sub 011/ patch mode is suppressed through proper design (see Jackson, D.R. et al., IEEE Trans. Antennas and Propagation, vol.41, no.8, 1993). The mutual coupling between a pair of shorted annular ring (SAR) RSW antennas was studied theoretically and experimentally (see Khayat, M.A. et al., IEEE Trans. Antennas and Propagation, vol.48, no.10, 2000). The study showed that the E-plane mutual coupling between RSW antennas fell off as 1//spl Delta//sup 3/ (for thin substrates), where /spl Delta/ is the center-to-center separation between the antennas. This is a much faster falloff than for conventional microstrip antennas, where the E-plane mutual coupling decays as 1//spl Delta/ (for thin substrates). The weak mutual coupling property makes a RSW array design very promising. The mutual coupling between RSW elements in an array with an arbitrary lattice angle /spl alpha/ is considered. Specifically, the mutual coupling in an equilateral triangular lattice (/spl alpha/=60/spl deg/) and a square lattice (/spl alpha/=90/spl deg/) are studied. Two feeding methods, E-plane feeding and a rotated feeding are considered and results are compared with those of a conventional circular microstrip array. The grating lobe issue is also studied for different lattice angles.
Keywords :
antenna feeds; electromagnetic coupling; microstrip antenna arrays; surface electromagnetic waves; E-plane feeding; E-plane mutual coupling; antenna arrays; arbitrary lattice angle; circular microstrip array; equilateral triangular lattice; lateral-wave radiation; microstrip antennas; reduced surface wave antennas; rotated feeding; shorted annular ring antennas; square lattice; surface-wave radiation; Antenna arrays; Electromagnetic radiation; Feeds; Impedance; Lattices; Magnetic separation; Microstrip antenna arrays; Microstrip antennas; Mutual coupling; Surface waves;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Antennas and Propagation Society International Symposium, 2001. IEEE
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-7070-8
Type :
conf
DOI :
10.1109/APS.2001.960078
Filename :
960078
Link To Document :
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