SIWFilter

Create an SIW bandpass filter with split rings in microstrip form

Since R2023b

Description

Use the SIWFilter object to create a bandpass filter in microstrip form. The filter is a combination of a Substrate Integrated Waveguide (SIW) transmission line and split ring resonator.

Creation

Syntax

filter = SIWFilter

filter = SIWFilter(PropertyName=Value)

Description

filter = SIWFilter creates a default SIW filter with passband of filter centered around 7 GHz, with a bandwidth of 1.5 GHz. Default substrate is Teflon with a thickness of 0.253e-3 m.

filter = SIWFilter(PropertyName=Value) sets Properties using one or more name-value arguments. For example, SIWFilter(NumResonators=5) creates a filter with five resonators. Properties not specified retain their default values.

Properties

TxlineElement — Transmission line element used in the bandpass filter

SIWLine (default)

Transmission line element used in the bandpass filter specified as a SIWline.

Data Types: char | string

Resonator — Shape of split ring resonator

Square (default) | Circle | Triangle | Hexagon | Octagon

Resonator shape is specified as a splitRing shape, either Square, Circle, Triangle, Hexagon, or Octagon

Example: Filter = SIWFilter(Resonator = splitRing(Type = "Hexagon"))

Data Types: char | string

NumResonators — Number of Resonators in bandpass filter

3 (default) | positive scalar

Number of Resonators is specified as a positive scalar.

Example: Filter = SIWFilter(NumResonators = 5)

Data Types: double

ResonatorSpacing — Spacing between Resonators in meters

5e-3 (default) | positive scalar

Resonator spacing is specified as a positive scalar.

Example: Filter = SIWFilter(ResonatorSpacing = 7e-3)

Data Types: double

Object Functions

charge	Calculate and plot charge distribution
current	Calculate and plot current distribution
dgs	Create defected ground structure of PCB element
feedCurrent	Calculate current at feed port
layout	Plot all metal layers and board shape
mesh	Change and view mesh properties of metal or dielectric in PCB component
shapes	Extract all metal layer shapes of PCB component
show	Display PCB component structure or PCB shape
sparameters	Calculate S-parameters for RF PCB objects

Examples

Default SIW Bandpass Filter

Create and visualize a default SIW Bandpass Filter

filter = SIWFilter

filter = 
  SIWFilter with properties:

       TxlineElement: [1×1 SIWLine]
           Resonator: [1×1 splitRing]
       NumResonators: 3
    ResonatorSpacing: 0.0050

show(filter)

SIW Bandpass Filter with Circular Split Ring

Create and visualize SIW band pass filter with circular split ring resonator

filter = SIWFilter;
filter.Resonator = splitRing(Type="Circle")

filter = 
  SIWFilter with properties:

       TxlineElement: [1×1 SIWLine]
           Resonator: [1×1 splitRing]
       NumResonators: 3
    ResonatorSpacing: 0.0050

show(filter)

Version History

Introduced in R2023b