DFW vs SIW | difference between DFW and SIW

This page compares DFW vs SIW and mentions difference between DFW and SIW. DFW stands for Dielectric Filled Waveguide and SIW stands for Substrate Integrated Waveguide.

At higher frequencies, wavelengths are small. Due to this, microstrip manufacturing requires very tight tolerances and hence are not efficient. Hence waveguide devices are preferable over microstrip. Refer Microstrip vs Waveguide>>.

DFW | Dielectric Filled Waveguide

DFW-Dielectric Filled Waveguide

The figure-1 depicts DFW i.e. Dielectric Filled Waveguide. It consists of three layers with dielectric layer in between.

SIW | Substrate Integrated Waveguide

SIW-Substrate Integrated Waveguide

The figure-2 depicts SIW i.e. Substrate Integrated Waveguide. DFW is converted to SIW with the help of via holes on the side walls of the rectangular waveguide as shown. Here top and bottom planes are grounded. Due to use of via holes TM mode does not exist and TE mode exists in SIW. TE10 is used as dominant mode in SIW structure.

SIW | Substrate Integrated Waveguide Related

What is SIW
SIW operating mode
Microstrip to SIW transition
Advantages and Disadvantages of SIW

Types of Transmission Lines

stripline basics and types
Microstrip line variants
Slotline basics and types
Finline basics
CPW(Coplanar Waveguide) basics

Transmission Line Transitions

Coaxial to microstrip transition
Coaxial to waveguide transition
Waveguide to microstrip transition
Microstrip to slotline transition

What is Difference between

difference between FDM and OFDM
Difference between SC-FDMA and OFDM
Difference between SISO and MIMO
difference between TE11 and TM11 mode
difference between TEM and Quasi TEM wave
difference between TE and TM wave
Rectangular vs circular waveguide
difference between 4 port and 3 port circulator
waveguide isolator vs microstrip isolator

RF and Wireless Terminologies