Dual frequency circularly polarized microstrip antenna array (Sergiy Y. Martynyuk, Dmytro O. Vasylenko)

Paper contains the most valuable results of experimental and theoretical investigations of dual frequency circularly polarized microstrip antenna array for smart antenna applications with adaptive space-time processing capability. Geometry of the proposed antenna array was optimized for the operation in two frequency bands located inside IEEE L band. Presented array structure is composed from ten microstrip radiators independently excited via separate coaxial input ports. Two central radiat-
ing elements for two frequency bands have circular shapes with slits and are stacked to provide compact sizes and convergence of their phase centers. Peripheral radiators have annular ring with slits topology. Their geometric centers are superposed with the corners of virtual quadrats with the sides equal to the half of the wavelength for the appropriate band to eliminate the appearance of grating lobes and additional nulls in equivalent radiation patterns. The main feature of the array is its compact packaging that causes significant levels of electromagnetic mutual coupling. Last influences and noticeably deteriorates the shapes of radiation patterns, purity of polarization characteristics and reflection characteristics of planar radiators. The geometric parameters of presented array were selected via multi parametric particle swarm optimization method to provide optimum performance of each radiator in compact array packaging. Moreover, several circularly polarized radiators of the described array assembly were rotated around their centers to improve their characteristics and to increase the quality and effectiveness of latter space-time processing of adaptive antenna system. Novel design of the dual frequency circularly polarized array and imperfectness of obtained characteristics are experimentally validated.

Рік видання: 2012
Номер: 1
УДК 621.372.22
С. 46—54. Іл. 11. табл. 1. Бібліогр: 11 назв.

Література:
1. Mukhopadhyay M., Sarkar B. K., Chakraborty A. Augmentation of anti-jam GPS system using smart antenna with a simple DOA estimation algorithm // Progress in Electromagnetics Research. ─ 2007. ─ Vol. 67. ─ P. 231─249.
2. Smart antennas ─ state of the art. Eurasip series / T. Kaiser, A. Bourdoux, et al. ─ New York: Hindawi Corporation, 2009. ─ 864 p.
3. Adaptive antenna systems / B. Widrow, P. E. Mantey, L. J. Griffiths, B. B. Goode // IEEE Proceedings. ─ 1967. ─ Vol. 55, N. 12. ─ P. 2143─2159.
4. Brown A. High accuracy GPS performance using digital adaptive beamforming technique // Proceedings of ION National Technical Meeting, Long Beach, January 2011. ─ P. 210─218.
5. Smart antenna terminals for broadband mobile satellite communications at Ka-band / A. Geise, A. Jacob, K. Kuhlmann, H. Pawlak, at al. // Proceedings of International ITG Conference on Antennas, Munich, Germany, April 2007. ─ P. 57─60.
6. Huang Z., Balanis C. A., Birtcher C. R. Mutual coupling compensation in UCAs: Simulations and experiment // IEEE Transactions on Antennas and Propagation. ─ 2007. ─ Vol. 54, N. 11. ─ P. 3082─3086.
7. GALANT ─ Galileo antenna demonstrator for safety critical applications / M. Cuntz, A. Konovaltsev, A. Hornbostel, et al. // Proceedings of European Conference on Antennas and Propagation, Berlin, Germany, 2010. ─ P. 1103─1105.
8. Rogers Corporation, USA ─ www.rogerscorporation.com.
9. Wong K. L. Compact and broadband microstrip antennas. ─ New York: John Wiley & Sons, 2002. ─ 300 p.
10. Chen H. M., Wong K. L. On circular polarization design of annular-ring microstrip antennas // IEEE Transactions on Antennas and Propagation. ─ 1999. ─ Vol. 47, N. 8. ─ P. 1289─ 1292.
11. CST Microwave Studio. ─ Manual, 2008.

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