A parasitic three-element superdirective electrically small antenna array

This paper presents a parasitic three-element superdirective electrically small antenna array based on very small printed loop antenna (unit-element). The unit-element dimensions are 24 × 20mm2 corresponding to λ/14 × λ/17relative to its resonance frequency of 900MHz. The array has been designed for an interelement distance of 21.5mm. Its total dimensions are 63 × 24mm2, and it presents a simulated directivity of 9dBi. The array optimization has been performed using an ad-hoc procedure based on spherical wave expansion.

[1]  Clive Parini,et al.  Spherical near-field antenna measurements , 2014, Theory and Practice of Modern Antenna Range Measurements, 2nd Expanded Edition, Volume 2.

[2]  T.H. O'Donnell,et al.  Electrically small superdirective arrays using parasitic elements , 2006, 2006 IEEE Antennas and Propagation Society International Symposium.

[3]  Christophe Delaveaud,et al.  Miniature directive antennas , 2014, International Journal of Microwave and Wireless Technologies.

[4]  Antonio Clemente,et al.  Analysis of electrical dipole linear array maximum directivity , 2015, 2015 9th European Conference on Antennas and Propagation (EuCAP).

[5]  Abdullah Haskou,et al.  A design methodology for electrically small superdirective antenna arrays , 2014, 2014 Loughborough Antennas and Propagation Conference (LAPC).

[6]  T.H. O'Donnell,et al.  An Impedance-Matched 2-Element Superdirective Array , 2008, IEEE Antennas and Wireless Propagation Letters.

[7]  S. Collardey,et al.  Superdirective metamaterial-inspired electrically small antenna arrays , 2013, 2013 7th European Conference on Antennas and Propagation (EuCAP).

[8]  T.H. O'Donnell,et al.  A monopole superdirective array , 2005, IEEE Transactions on Antennas and Propagation.

[9]  Antonio Clemente,et al.  Analysis of Harrington limit for electrically small antenna directivity , 2014, The 8th European Conference on Antennas and Propagation (EuCAP 2014).

[10]  C. Delaveaud,et al.  Super directive compact antenna design using spherical wave expansion , 2014, 2014 IEEE Antennas and Propagation Society International Symposium (APSURSI).