Equivalence between substrate‐integrated rectangular waveguide (SIRW) bend and rectangular waveguide (RW) bend

The equivalence between substrate-integrated waveguide (SIRW) bend and rectangular waveguide bend is investigated in several bands. The width of the equivalent rectangular waveguide of SIRW can be found from a developed formula. The simulation and experimental results all indicate that good agreement of the propagation characteristics of SIRW and RW bends can be observed. However, some insertion loss discrepancies between these two kinds of bends are observed. In addition, the insertion loss of the SIWR bend exhibits some fluctuation within the frequency band of interest, while the insertion loss of the RW bend remains relatively smooth. Furthermore, an SIRW bend and one straight SIRW section with same length are also investigated; the results indicate that the SIRW bend preserves well the propagation characteristic of the straight SIRW. In addition, the analysis also indicates that the first higher mode appears earlier in the SIRW bend than in the RW bend. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1487–1491, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21739

[1]  L. Perregrini,et al.  Low-Cost and High-Q Millimeter-Wave Resonator Using Substrate Integrated Waveguide Technique , 2002, 2002 32nd European Microwave Conference.

[2]  Wenquan Che,et al.  Equivalence between waveguides with side walls of cylinders (SIRW) and of regular solid sheets , 2005, 2005 Asia-Pacific Microwave Conference Proceedings.

[3]  Ke Wu,et al.  Substrate integrated waveguide directional couplers , 2002 .

[4]  K. Wu,et al.  Integrated microstrip and rectangular waveguide in planar form , 2001, IEEE Microwave and Wireless Components Letters.

[5]  M. Ando,et al.  Single-layer feed waveguide consisting of posts for plane TEM wave excitation in parallel plates , 1998 .

[6]  Ke Wu,et al.  Development of substrate integrated waveguide power dividers , 2003, CCECE 2003 - Canadian Conference on Electrical and Computer Engineering. Toward a Caring and Humane Technology (Cat. No.03CH37436).

[7]  K. Wu,et al.  Low cost microwave oscillator using substrate integrated waveguide cavity , 2003, IEEE Microwave and Wireless Components Letters.

[8]  J. Helszajn,et al.  A substrate integrated waveguide degree-2 circulator , 2004, IEEE Microwave and Wireless Components Letters.

[9]  L. Perregrini,et al.  Dispersion characteristics of substrate integrated rectangular waveguide , 2002, IEEE Microwave and Wireless Components Letters.