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phaseShift

Calculate phase shift values for arrays or multi-feed PCB stack

Description

example

ps = phaseShift(array,frequency,angle) calculates the phase shift values of an array operating at a specified frequency to scan the beam at the given angle. The velocity of light is assumed to be that in free space.

ps = phaseShift(pcb,frequency,angle) calculates the phase shift values of a multi-feed PCB stack at a specified frequency and angle.

Examples

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Create a 3-by-3 rectangular array of reflector-backed dipoles at an operating frequency of 1.8 GHz, and scan the main beam at 30 degrees along the azimuth and 45 degrees along the elevation.

a = design(rectangularArray('Size',[3 3]),1.8e9,reflector);
ps = phaseShift(a,1.8e9,[30;45])
ps = 9×1

  350.5337
   54.1733
  117.8129
  240.3066
  303.9462
    7.5858
  130.0796
  193.7192
  257.3588

a.PhaseShift = ps
a = 
  rectangularArray with properties:

           Element: [1x1 reflector]
              Size: [3 3]
        RowSpacing: 0.0833
     ColumnSpacing: 0.0833
           Lattice: 'Rectangular'
    AmplitudeTaper: 1
        PhaseShift: [9x1 double]
              Tilt: 0
          TiltAxis: [1 0 0]

Calculate the radiation pattern of the array.

pattern(a,1.8e9)

Figure contains an axes object and other objects of type uicontrol. The axes object contains 29 objects of type patch, surface.

Input Arguments

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Antenna array from the Antenna Toolbox™ array library, specified as an array object.

Example: r = rectangularArray; phaseShift (r,70e6,[60;40]). Calculates the phase shift of the rectangular array.

Multi-feed PCB stack, specified as a pcbStack object.

Example: fco = invertedFcoplanar; pcb = pcbStack(fco); phaseShift (pcb,70e6,[60;40]) Calculates the phase shift of the coplanar inverted F antenna PCB.

Frequency value used to calculate the phase shift, specified as a scalar in Hz.

Example: 70e6

Data Types: double

Azimuth and elevation angle pair to scan the array toward, specified as a 2-element vector in degrees.

Example: [35;40]

Data Types: double

Output Arguments

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Phase shift values, returned as a 1-by-N vector in degrees. Phase shift value calculation does not consider mutual coupling.

Introduced in R2018b