Modelling customAntennaElement and customMicrophoneElement

I am trying to model transmitting element and receiving element as customAntenna element.

In documentation it is given

“The total response of a custom microphone element is a combination of its frequency response and spatial response”

But When I vary the frequency response to different values (e.g: element 1: 150db for all frequencies, element 2: 180dB for all frequencies) I do not see any differences in the response patterns, DI or sidelobe level or null location?

I am not defining spatial response, leaving it to default values. Whether problem is because of this?

Similar observation made when I’m modelling response of hydrophone (underwater microphone) as customMicrophoneElement

If a microphone has to be modelled, the frequency response will be modelled as receiving sensitivity which will be valued like -200dB or -170 dB.

I do not see any difference between two microphones or response of a transmitter and hydrophone

Answer 1

[Honglei Chen]

If you are not varying the spatial pattern, then null location, relative sidelobe level and directivity will stay the same since they are spatial related characteristics. However, the total response is scaled by the frequency response. Did you use plotResponse to examine the response pattern? If so, did you set 'NormalizeResponse' to false? By default it's true so the response is normalized therefore because the spatial patterns are the same, the patterns look identical.

HTH