Theory and Experiment of a Compact Waveguide Dual Circular Polarizer

A new compact and wide-band waveguide dual circular polarizer at Ka-band is presented and tested in this paper. This compact structure is composed of a three-port polarizing diplexer and a circular polarizer realized by a simple pair of large grooves. The polarizing diplexer includes two rectangular waveguides with a perpendicular H-plane junction, one circular waveguide coupled in E- plane. A cylindrical step and two pins are used to match this structure. For a LHCP or RHCP wave in the circular port, only one speciflc rectangular port outputs power and the other one is isolated. The accurate analysis and design of the circular polarizer are conducted by using full-wave electromagnetic simulation tools. The optimized dual circular polarizer has the advantage of compact size with a volume smaller than 1.5‚ 3 , broad bandwidth, uncomplicated structure, and is especially suitable for use at high frequencies such as Ka-band and above. The prototype of the polarizer has been manufactured and test, the experimental results are basically consistent with the theories.

[1]  Anton M. Bøifot,et al.  Classification of Ortho-mode transducers , 1991, Eur. Trans. Telecommun..

[2]  Jens Bornemann,et al.  Ridge waveguide polarizer with finite and stepped-thickness septum , 1995 .

[3]  L. Accatino,et al.  CAD and Optimization of Compact Wide-band Septum Polarizers , 1999, 1999 29th European Microwave Conference.

[4]  N. Yoneda,et al.  A 90 GHz-band monoblock type waveguide orthomode transducer , 1999, 1999 IEEE MTT-S International Microwave Symposium Digest (Cat. No.99CH36282).

[5]  M. Miyazaki,et al.  Mono-grooved circular waveguide polarizers , 2002, 2002 IEEE MTT-S International Microwave Symposium Digest (Cat. No.02CH37278).

[6]  J. Carlstrom,et al.  Detection of polarization in the cosmic microwave background using DASI , 2002, Nature.

[7]  Mauro Mongiardo,et al.  Full-wave design and optimization of circular waveguide polarizers with elliptical irises , 2002 .

[8]  M. Miyazaki,et al.  Ultra-thin broadband OMT with turnstile junction , 2003, IEEE MTT-S International Microwave Symposium Digest, 2003.

[9]  Chih-Hung Chien,et al.  A circular polarizer designed with a dielectric septum loading , 2004, IEEE Transactions on Microwave Theory and Techniques.

[10]  R. Tascone,et al.  A novel design tool for waveguide polarizers , 2005, IEEE Transactions on Microwave Theory and Techniques.

[11]  Soon Young Eom,et al.  A New Comb Circular Polarizer Suitable for Millimeter-Band Application , 2006 .

[12]  A. Navarrini,et al.  A turnstile junction waveguide orthomode transducer , 2006, IEEE Transactions on Microwave Theory and Techniques.

[13]  B. Maffei,et al.  A Broadband WR10 Turnstile Junction Orthomode Transducer , 2007, IEEE Microwave and Wireless Components Letters.

[14]  Yong-Chang Jiao,et al.  A NOVEL DESIGN OF DUAL CIRCULARLY POLARIZED ANTENNA FED BY L-STRIP , 2008 .

[15]  R. Orta,et al.  Combined-Phase-Shift Waveguide Polarizer , 2008, IEEE Microwave and Wireless Components Letters.

[16]  J. Masa-Campos,et al.  Dual linear/circular polarized plannar antenna with low profile double-layer polarizer of 45º tilted metallic strips for wimax applications , 2009 .

[17]  Abbas Ali Heidari,et al.  A Dual-Band Circularly Polarized Stub Loaded Microstrip Patch Antenna for GPS Applications , 2009 .

[18]  Y. B. Jung.  Ka-band polariser structure and its antenna application , 2009 .

[19]  T.-Y. Han,et al.  Circularly-Polarized Reconfigurable Microstrip Antenna , 2009 .

[20]  A Novel Three-Fed Microstrip Antenna for Circular Polarization Application , 2010 .

[21]  Guang Fu,et al.  Parametric Studies on the Circularly Polarized Stacked Annular-Ring Microstrip Antenna , 2010 .

[22]  I. Buder,et al.  FIRST SEASON QUIET OBSERVATIONS: MEASUREMENTS OF COSMIC MICROWAVE BACKGROUND POLARIZATION POWER SPECTRA AT 43 GHz IN THE MULTIPOLE RANGE 25 ⩽ ⩽ 475 , 2010, 1012.3191.

[23]  Bin Li,et al.  X-band compact septum polarizer design , 2011, 2011 IEEE International Conference on Microwave Technology & Computational Electromagnetics.

[24]  Jia-Yi Sze,et al.  DESIGN OF BROADBAND CIRCULARLY POLARIZED SQUARE SLOT ANTENNA WITH A COMPACT SIZE , 2011 .