resonatorSplitRingSquare

Create microstrip line loaded with square split-ring resonator

Since R2022b

Description

Use the resonatorSplitRingSquare object to create a microstrip line loaded with a square split-ring resonator.

Creation

Syntax

resonator = resonatorSplitRingSquare

resonator = resonatorSplitRingSquare(Name=Value)

Description

resonator = resonatorSplitRingSquare creates a microstrip line loaded with a square split-ring resonator on the X-Y plane. The default proprieties are for a design frequency of 5.7 GHz.

resonator = resonatorSplitRingSquare(Name=Value) sets Properties using one or more name-value arguments. For example, resonatorSplitRingSquare(RingWidth=0.045) creates a square split-ring resonator with a ring width of 0.045 meters. Properties not specified retain their default values

Properties

RingLengthInner — Length of inner ring

0.0036 (default) | positive scalar

Length of the inner ring of the ring resonator in meters, specified as a positive scalar.

Example: resonator = resonatorSplitRingSquare(RingLengthInner=0.045)

Data Types: double

RingWidth — Width of square ring

5.0000e-04 (default) | positive scalar

Width of the square ring in meters, specified as a positive scalar.

Example: resonator = resonatorSplitRingSquare(RingWidth=0.0009)

Data Types: double

RingSpacing — Spacing between inner and outer square ring

3.0000e-04 (default) | positive scalar

Spacing between the inner and outer square ring in meters, specified as a positive scalar.

Example: resonator = resonatorSplitRingSquare(RingSpacing=0.0008)

Data Types: double

SplitGap — Split gap on square ring

5.0000e-04 (default) | positive scalar

Split gap on the square ring in meters, specified as a positive scalar.

Example: resonator = resonatorSplitRingSquare(SplitGap=0.0008)

Data Types: double

CouplingGap — Gap between resonator and microstrip line

2.50000e-04 (default) | positive scalar

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

Example: resonator = resonatorSplitRingSquare(CouplingGap=0.00082)

Data Types: double

NumResonator — Number of resonators on one side of transmission line

5 (default) | positive scalar in the range [1,7]

Number of resonators on one side of the transmission line, specified as a positive scalar in the range [1,7]. The object supports a minimum of one resonator and a maximum of seven resonators.

Example: resonator = resonatorSplitRingSquare(NumResonator=4)

Data Types: double

ResonatorSpacing — Spacing between resonators

0.004 (default) | positive scalar

Spacing between the resonators when number of resonators is more than one in meters, specified as a positive scalar.

Example: resonator = resonatorSplitRingSquare(NumResonator=4)

Data Types: double

PortLineLength — Length of microstrip line

0.0450 (default) | positive scalar

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

Example: resonator = resonatorSplitRingSquare(PortLineLength=0.055)

Data Types: double

PortLineWidth — Width of microstrip line

0.0019 (default) | positive scalar

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

Example: resonator = resonatorSplitRingSquare(PortLineWidth=0.0061)

Data Types: double

Height — Height of resonator from ground plane

8.1300e-04 (default) | positive scalar

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

Example: resonator = resonatorSplitRingSquare(Height=0.020)

Data Types: double

GroundPlaneWidth — Width of ground plane

0.0200 (default) | positive scalar

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

Example: resonator = resonatorSplitRingSquare(GroundPlaneWidth=0.2241)

Data Types: double

Substrate — Type of dielectric material

dielectric("FR4") (default) | dielectric object

Type of dielectric material to use as a substrate, specified as a dielectric object. The thickness of the default dielectric material has the following parameters: (Name={'FR4'},EpsilonR=3.38,LossTangent=0.0002,Thickness=0.813e-3).

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

Conductor — Type of metal in conducting layers

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

Type of metal to use in the conducting layers, specified as a metal object.

Example: m = metal("PEC"); resonator = resonatorSplitRingSquare(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
design	Design hairpin filter around specified frequency
feedCurrent	Calculate current at feed port
getZ0	Calculate characteristic impedance of transmission line
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

Default Square Split-Ring Resonator

Create a default square split-ring resonator.

resonator = resonatorSplitRingSquare

resonator = 
  resonatorSplitRingSquare with properties:

     RingLengthInner: 0.0036
           RingWidth: 5.0000e-04
         RingSpacing: 3.0000e-04
            SplitGap: 5.0000e-04
         CouplingGap: 2.5000e-04
        NumResonator: 5
    ResonatorSpacing: 0.0040
      PortLineLength: 0.0450
       PortLineWidth: 0.0019
              Height: 8.1300e-04
    GroundPlaneWidth: 0.0200
           Substrate: [1x1 dielectric]
           Conductor: [1x1 metal]
          IsShielded: 0

View the resonator.

show(resonator)

Square Split-Ring Resonator with Different Dielectrics

Create a split-ring square with one resonator.

resonator = resonatorSplitRingSquare(NumResonator=1);
resonator.Height =  0.0016;

Create a dielectric object with two dielectrics. Use this substrate in the resonator.

sub = dielectric('FR4','Teflon');
sub.Thickness =[0.0016 0.0008];
resonator.Substrate = sub;

View the resonator.

figure; 
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

[3] Mahyuddin, Muzlifah and Nur Farah Syazwani Ab. Kadir. “A 10 GHz Low Phase Noise Split-Ring Resonator Oscillator.” International Journal of Information and Electronics Engineering, 2013.

Version History

Introduced in R2022b

R2023b: Metal shielding for square split ring resonator

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