Bidirectional Same-Sense Circularly Polarized Slot Antenna Using Polarization Converting Surface

An asymmetric frequency selective surface (FSS) based on Jerusalem cross-slot (JC-SL) unit cell is used as a polarization converting surface (PCS) to change the sense of the circularly polarized (CP) wave as it passes through it. This is achieved by introducing 0 ° and 180 ° phase shifts for the two perpendicular linear polarized components of the CP wave. Without adding any extra phase shift, the transmitted CP wave will encounter a change in its sense of polarization. The PCS is then combined with a bidirectional CP slot antenna to achieve right-hand CP (RHCP) signal on both sides of the antenna. The overall size of the structure is about 0.75λ×0.75λ×0.15λ, where λ is the free-space wavelength. The structure is designed to operate at the GPS L1 band ( f = 1.575 GHz).

[1]  Wang Guang-ming,et al.  Bidirectional Circularly Polarized Microstrip Antenna Fed by Coplanar Waveguide , 2006, 2006 7th International Symposium on Antennas, Propagation & EM Theory.

[2]  L. Robinson,et al.  Meander-line polarizer , 1973 .

[3]  S. Holzwarth,et al.  Low Profile GALILEO Antenna Using EBG Technology , 2008, IEEE Transactions on Antennas and Propagation.

[4]  Ben A. Munk,et al.  Frequency Selective Surfaces: Theory and Design , 2000 .

[5]  Zhenghe Feng,et al.  A Waveguide Antenna With Bidirectional Circular Polarizations of the Same Sense , 2013, IEEE Antennas and Wireless Propagation Letters.

[6]  Nader Behdad,et al.  A generalized method for synthesizing miniaturized element band-pass frequency selective surfaces , 2010, 2010 IEEE Antennas and Propagation Society International Symposium.

[7]  Hua-Ming Chen,et al.  Bidirectional radiated circularly polarised square-ring antenna for portable RFID reader , 2008 .

[8]  P. Mousavi,et al.  Bidirectional RHCP monopole slot antenna using Jerusalem-FSS polarization converter , 2013, 2013 IEEE Antennas and Propagation Society International Symposium (APSURSI).

[9]  H. Iwasaki.  Slot-coupled back-to-back microstrip antenna with an omni- or a bi-directional radiation pattern , 1999 .

[10]  M. Unwin,et al.  A Compact Multipath Mitigating Ground Plane for Multiband GNSS Antennas , 2013, IEEE Transactions on Antennas and Propagation.

[11]  H. Al‐Rizzo,et al.  Analysis of a choke ring groundplane for multipath control in Global Positioning System (GPS) applications , 1994 .

[12]  M. J. Ammann,et al.  Bidirectional circularly polarized microstrip antenna for GPS applications , 2010, 2010 Loughborough Antennas & Propagation Conference.