Performance enhancement of a wideband spiral antenna using a stepped ground plane

This study presents the use of a stepped ground plane as a means to increase the gain and front-to-back ratio of an Archimedean spiral which operates in the frequency range 3–10 GHz. The backing structure is designed to optimize the antenna performance in discrete 1 GHz bands by placing each of the eight metal steps one quarter wavelength below the corresponding active regions of the spiral. Simulated and experimental results show that this type of ground plane can be designed to enhance the antenna performance over the entire 105% operating bandwidth of the spiral. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:753–757, 2014

[1]  Luis P. Poli.  The Archimedean Two-Wire Spiral Antenna* , 1959 .

[2]  Y. Mushiake,et al.  Self-complementary antennas , 1992, IEEE Antennas and Propagation Magazine.

[3]  A. Prata,et al.  Archimedean spiral-mode microstrip antenna with improved axial ratio , 1999, IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010).

[4]  Aixin Chen,et al.  Design of an Archimedean spiral antenna , 2008, 2008 8th International Symposium on Antennas, Propagation and EM Theory.

[5]  T.E. Morgan.  18-40 GHz Spiral Antenna , 1987, 1987 17th European Microwave Conference.

[6]  V. Fusco,et al.  Design of a cavity backed spiral antenna with improved pattern symmetry , 2013, 2013 7th European Conference on Antennas and Propagation (EuCAP).

[7]  R. Cahill,et al.  Side-fed bifilar helix antenna , 2005, IEEE Microwave and Wireless Components Letters.

[8]  J. Yamauchi,et al.  A spiral antenna backed by a conducting plane reflector , 1986 .

[9]  P. H. Rao,et al.  Dual Band Planar Spiral Feed Backed by a Stepped Ground Plane Cavity for Satellite Boresight Reference Antenna Applications , 2009, IEEE Transactions on Antennas and Propagation.

[10]  D. Filipovic,et al.  Spiral Cavity Backing Effects on Pattern Symmetry and Modal Contamination , 2006, IEEE Antennas and Wireless Propagation Letters.

[11]  D. Baumann,et al.  Finite-volume time-domain analysis of a cavity-backed Archimedean spiral antenna , 2006, IEEE Transactions on Antennas and Propagation.