Facing some problem in uniform rectangular array

2012 6 24
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hi, I have recently started using phased array system toolbox. I have designed a uniform rectangular array using the phased.URA command and plotted it using the plotResponse function. when I use the center frequency of 1Ghz or 300Mhz ,all goes well but when I use any other frequency like 2.45Ghz , it does not give me any plot.why is it?? what should I do to solve this problem?? kindly suggest me answers..

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Honglei Chen
Honglei Chen 2012-6-24

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Hi Najam,
The default operating frequency range of an isotropic antenna element is set to between 300 MHz and 1 GHz, as you can see form the following code.
h = phased.URA
h.Element
Therefore, 2.45GHz is out of the operating frequency range of the array and it is assumed that there is no response at that frequency. You can adjust the operating frequency range by adjusting the FrequencyRange property of the antenna.
h.Element.FrequencyRange = [3e8 3e9]
plotResponse(h,2.45e9,3e8,'Format','Polar')
HTH

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