resonatorSplitRingCustom

Create custom split-ring resonator in microstrip form

Since R2023a

Description

Use the resonatorSplitRingCustom object to create a custom split-ring resonator in the microstrip form.

Creation

Syntax

resonator = resonatorSplitRingCustom

resonator = resonatorSplitRingCustom(Name=Value)

Description

resonator = resonatorSplitRingCustom creates a custom split-ring resonator with default properties.

resonator = resonatorSplitRingCustom(Name=Value) sets Properties using one or more name-value arguments. For example, resonatorSplitRingCustom(Resonator="Square") creates a custom split-ring resonator with the split-ring element in the shape of a square. Properties not specified retain their default values

Properties

Resonator — Shape of split-ring element

'splitRing' shape object (default)

Shape of the split-ring element, specified as a splitRing shape object. This property also accepts different types in split ring like square, triangle, hexagon, and octagon.

Example: resonator = resonatorSplitRingCustom(Resonator=split)

Data Types: char | string

NumResonator — Number of resonators in coupled feed

2 (default) | positive scalar

Number of resonators in the coupled feed, specified as a positive scalar in the range 1 to11.

Example: resonator = resonatorSplitRingCustom(NumResonator=2)

Dependencies

To enable this property, set FeedType to 'Coupled'.

Data Types: double

ResonatorSpacing — Spacing between resonators

4.0325e-3 (default) | positive scalar

Spacing between the resonators in meters, specified as a positive scalar.

Example: resonator = resonatorSplitRingCustom(ResonatorSpacing=5.07e-3)

Dependencies

To enable this property, set FeedType to 'Coupled'.

Data Types: double

PortLineLength — Length of port line

0.0100 (default) | positive scalar

Length of the port line in meters, specified as a positive scalar.

Example: resonator = resonatorSplitRingCustom(PortLineLength=0.055)

Data Types: double

PortLineWidth — Width of port line

7.5000e-04 (default) | positive scalar

Width of the port line in meters, specified as a positive scalar.

Example: resonator = resonatorSplitRingCustom(PortLineWidth=0.0061)

Data Types: double

FeedType — Type of feed

'Tapped' (default) | 'Coupled'

Type of feed, specified as 'Tapped' or 'Coupled'.

Example: resonator = resonatorSplitRingCustom(FeedType='Coupled')

Data Types: char | string

CouplingGap — Gap between resonator and microstrip line

1.8270e-04 (default) | positive scalar

Gap between the resonator and the microstrip line in meters for the coupled feed resonator, specified as a positive scalar.

Example: resonator = resonatorSplitRingCustom(CouplingGap=0.00082)

Dependencies

To enable this property, set FeedType to 'Coupled'.

Data Types: double

Height — Height of resonator from ground plane

0.000813 (default) | positive scalar

Height of the resonator from the ground plane in meters, specified as a positive scalar.

In the case of a multilayer substrate, you can use the Height property to create a custom split-ring resonator where the two dielectrics interface.

Example: resonator = resonatorSplitRingCustom(Height=0.020)

Data Types: double

GroundPlaneWidth — Width of ground plane

0.0120 (default) | positive scalar

Width of the ground plane in meters, specified as a positive scalar.

Example: resonator = resonatorSplitRingCustom(GroundPlaneWidth=0.2241)

Data Types: double

Substrate — Type of dielectric material

dielectric("Teflon") (default) | dielectric object

Type of dielectric material to use as a substrate, specified as a dielectric object. The type of substrate in a resonatorSplitRingCustom object with default properties is Teflon.

Example: d = dielectric("FR4"); resonator = resonatorSplitRingCustom(Substrate=d)

Conductor — Type of metal in conducting layers

metal("Copper") (default) | metal object

Type of metal used in the conducting layers, specified as a metal object. The metal used in the conducting layers of resonatorSplitRingCustom object with default properties is Copper.

Example: m = metal("Copper"); coupler = resonatorSplitRingCustom(Conductor=m)

IsShielded — Flag to add metal shielding

false or 0 (default) | true or 1

Flag to add a metal shielding to the PCB component, specified as a logical 0 or logical 1. The default value is logical 0.

Example: IsShielded = true or 1 add a metal shield.

Note

To enable FEM solver required for the metal shield property, download the Integro-Differential Modeling Framework for MATLAB. To download this add-on:

1. In the Home tab Environment section, click on Add-Ons. This opens the add-on explorer. You need an active internet connection to download the add-on.

2. Search for Integro-Differential Modeling Framework for MATLAB and click Install.

3. To verify if the download is successful, run

   matlab.addons.installedAddons

   in your MATLAB^® session command line.

4. On Windows, to run the IDMF add-on, you must install the Windows Subsystem for Linux (WSL). To install WSL, see Install Linux on Windows with WSL.

   The Windows Defender Firewall can block the PostgreSQL server when using the IDMF add-on. To resolve this issue, you can allow the server to communicate on desired networks if the firewall prompts. Alternatively, you can manually add the executable file of the PostgreSQL server located in <matlabroot>\sys\postgresql\win64\PostgreSQL\bin\postgres.exe. For more information, see https://support.microsoft.com/en-us/windows/risks-of-allowing-apps-through-windows-defender-firewall-654559af-3f54-3dcf-349f-71ccd90bcc5c.

Data Types: logical

Shielding — Metal shielding

shape.Box object

This property is read-only.

Metal shield for the PCB component, specified as a shape.Box object. The length and width of the box must be equal to the length and width of the ground plane. The center of the box is at [0 0 Shielding.Height].

Dependencies

To enable the Shielding property, set the IsShielded property to true or 1.

Connector — Type of RF connector

RFConnector object

Type of RF connector assembled at the feed locations of the PCB component, specified as a RFConnector object.

Example: Create connector from RFConnector object like this: coaxial = RFConnector adds a coaxial connector.

Dependencies

To enable the Connector property, set the IsShielded property to true or 1.

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
RFConnector	Create RF connector

Examples

Custom Split-Ring Resonator with Default Values

Create a custom split-ring resonator with default properties.

resonator = resonatorSplitRingCustom

resonator = 
  resonatorSplitRingCustom with properties:

           Resonator: [1x1 splitRing]
      PortLineLength: 0.0100
       PortLineWidth: 7.5000e-04
            FeedType: 'Tapped'
              Height: 8.1300e-04
    GroundPlaneWidth: 0.0120
           Substrate: [1x1 dielectric]
           Conductor: [1x1 metal]
          IsShielded: 0

View the resonator.

show(resonator)

Square Split-Ring Resonator with Tapped Feed

Create a resonator with a tapped feed and a square split ring.

resonator = resonatorSplitRingCustom;
resonator.Resonator.Type='Square';

View the resonator.

show(resonator);

Split-Ring Resonator with Coupled Feed

Create a split-ring resonator with coupled-feed and three resonators.

resonator = resonatorSplitRingCustom('FeedType','Coupled');
resonator.PortLineLength= 20e-3;
resonator.NumResonator = 3;

View the resonator.

show(resonator);

References

[1] Pozar, David.M. Microwave Engineering Singapore; JohnWiley and Sons. Inc, 2012.

[2] Mahyuddin, Muzlifah and Nur Farah Syazwani Ab. Kadir. Design of a 5.8 GHz Bandstop Filter Using Split Ring Resonator Array

Version History

Introduced in R2023a

R2023b: Metal shielding for custom ring resonator

Use the IsShielded, Shielding, and Connector properties to add a metal shield to the resonatorSplitRingCustom object.