Engineering:Post-wall waveguide

A post-wall waveguide (also known as substrate integrated waveguide (SIW) or a laminated waveguide) is a synthetic rectangular electromagnetic waveguide formed in a dielectric substrate by densely arraying metallized posts or via-holes which connect the upper and lower metal plates of the substrate. The waveguide can be easily fabricated with low-cost and mass-production using through-hole techniques where the post walls consists of via fences. The post-wall waveguide is known to have similar guided wave and mode characteristics to the conventional rectangular waveguide with equivalent guided wavelength. For instance, the equivalent width of a rectangular waveguide compared to a SIW is described in the approximation:

$a_{RWG}=a_{SIW}-1.08(2r{)}^2/p+0.1(2r{)}^2/a_{SIW}$

where $p$ is the distance between the posts in the post wall, $r$ describes the radius, and $a_{RWG}$ as well as $a_{SIW}$ are the widths of the rectangular waveguide and SIW respectively.

See also

• Planar transmission line § Substrate integrated waveguide, also
  • Planar transmission line § Transitions
  • Planar transmission line § Circuit gallery
• Ke Wu, inventor

External links

• siwspace.com – A web on Substrate integrated waveguide