power in antenna pattern()

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antenna enthusiast 2020-6-21

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评论： Raunak Gupta 2020-7-9

Hello

can someone explain to me what the 2 types power and powerdb mean?

pattern(dipole, 150e6,'type','power')

pattern(dipole, 150e6,'type','powerdb')

also, i wonder how i can write an msi file (msiwrite()) for a 3 D pattern instead of 2D.

Thanks in advance.

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Answer 1

Raunak Gupta 2020-6-24

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Hi,

The ‘Type’ means the radiation pattern quantity to plotted with respect to azimuth and elevation. By default, its 'directivity'. ‘power’ is power specified in Watts and ‘powerdb’ is power specified in dB. As for the msiwrite it supports 2-D pattern as of now.

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antenna enthusiast 2020-6-29

Thanks for the answer. When you say power, are refering to Effective Radiated Power? and if that is the case, what is the assumed input power? is there a way we can plot Gain instead so it includes losses? Thanks

Raunak Gupta 2020-7-9

Hi,

As mentioned here on the third point that the source is a ideal voltage source of 1 Volt, this means that assumed input power is 1 Watt but it really depends upon the impedance of antenna.

There are more options available for parameter 'Type' which can plot the same radiation pattern with respect to gain and directivity. You may use 'gain' instead for 'power' for including the losses.

Hope it helps!

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