bandwidth

Calculate absolute bandwidth of AI-based antenna

Since R2024a

Syntax

bandwidth(aiant)

[absBW,fL,fU,matching] = bandwidth(aiant)

Description

bandwidth(aiant) calculates and returns the absolute bandwidth of the AI-based antenna model.

[absBW,fL,fU,matching] = bandwidth(aiant) calculates and returns the absolute bandwidth, its lower and upper frequency bound, and impedance matching status of the AI-based antenna model.

Examples

Create and Analyze AI-Based Microstrip Patch Antenna

This example shows how to create an AI-based microstrip patch antenna operating at 1.67 GHz, and calculate its bandwidth and resonant frequency.

Use the design function with the ForAI argument set to true to create an AI-based microstrip patch antenna operating at 1.67 GHz. To use the ForAI argument in the design function you need a license to the Statistics and Machine Learning Toolbox™.

pAI = design(patchMicrostrip,1.67e9,ForAI=true)

pAI = 
  AIAntenna with properties:

   Antenna Info
               AntennaType: 'patchMicrostrip'
    InitialDesignFrequency: 1.6700e+09

   Tunable Parameters
                    Length: 0.0862
                     Width: 0.1122
                    Height: 0.0018

Show read-only properties

Explore the design space by changing its length and width with values within the tunable range of these properties. You can get the tunable range of a property by using tunableRanges function on the AI-based antenna object.

pAI.Length = 0.0855;
pAI.Width = 0.113;

Calculate the absolute bandwidth of the antenna and its lower and upper bounds.

[absBW,fL,fU,matchingStatus] = bandwidth(pAI)

absBW = 
2.3422e+07

fL = 
1.6679e+09

fU = 
1.6913e+09

matchingStatus = categorical
     Matched 

Calculate the resonant frequency of the antenna.

fR = resonantFrequency(pAI)

fR = 
1.7016e+09

Convert the AI-based microstrip patch antenna to a regular microstrip patch antenna.

pm = exportAntenna(pAI)

pm = 
  patchMicrostrip with properties:

               Length: 0.0855
                Width: 0.1130
               Height: 0.0018
            Substrate: [1×1 dielectric]
    GroundPlaneLength: 0.1795
     GroundPlaneWidth: 0.1795
    PatchCenterOffset: [0 0]
           FeedOffset: [0.0181 0]
            Conductor: [1×1 metal]
                 Tilt: 0
             TiltAxis: [1 0 0]
                 Load: [1×1 lumpedElement]

Input Arguments

aiant — AI-based antenna

AIAntenna object

AI-based antenna, specified as an AIAntenna object created using the design function.

Output Arguments

absBW — Absolute bandwidth

positive scalar

Absolute bandwidth of the specified AI-based antenna in Hz, returned as a positive scalar.

Example: 2.3422e7

Data Types: double

fL — Lower frequency bound of bandwidth

positive scalar

Lower frequency bound of the bandwidth in Hz, returned as a positive scalar.

Example: 1.6679e9

Data Types: double

fU — Upper frequency bound of bandwidth

positive scalar

Upper frequency bound of bandwidth in Hz, returned as positive scalar.

Example: 1.6913e9

Data Types: double

matching — Impedance match to 50 ohms

"Matched" | "Almost" | "Not Matched"

Impedance match to 50 ohms, returned as "Matched", "Almost", or "Not Matched". When the value is:

• "Matched" — The antenna S11 dips below –10 dB.

• "Almost" — The antenna S11 dip is around –8 dB to –10 dB.

• "Not Matched" — The antenna S11 dip is around –8 dB or less (toward zero).

Data Types: categorical

Version History

Introduced in R2024a