Arrays of 4 circularly polarised aperture-coupled-fed stacked patch antennas for GPS interference mitigation

This paper presents an array antenna composed of 4 identical circularly polarised aperture-coupled-fed stacked patches for mitigation of GPS interference. The individual radiating elements have been designed to cover the three GPS frequency bands L1, L2 and L5, with a good polarisation ratio over the top hemisphere. Two array topologies are considered. The characteristics of the arrays are presented in terms of return loss, mutual coupling, gain and axial ratio. Radiation patterns synthesized for a boresight beam and, as rejection is of interest, for a boresight null, are provided and analyzed. The results give insights on the capability of the array for GPS interference mitigation.

[1]  J. Schuss,et al.  Axial ratio of balanced and unbalanced FED circularly polarized patch radiator arrays , 1987, 1987 Antennas and Propagation Society International Symposium.

[2]  J. R. James,et al.  Design principles of sequentially fed, wide bandwidth, circularly polarised microstrip antennas , 1989 .

[3]  Chi-Chih Chen,et al.  A single-fed element antenna for tri-band anti-jamming GPS arrays , 2008, 2008 IEEE Antennas and Propagation Society International Symposium.

[4]  J. Wight,et al.  An aperture-coupled circularly polarized stacked microstrip antenna for GPS frequency bands L1, L2, and L5 , 2008, 2008 IEEE Antennas and Propagation Society International Symposium.

[5]  C.A. Balanis,et al.  Spherical cap CRPAs for GPS , 2008, 2008 IEEE Antennas and Propagation Society International Symposium.

[6]  S. Duffy,et al.  A dual-band circularly polarized aperture-coupled stacked microstrip antenna for global positioning satellite , 1997 .