[BGT60TR13C] About angular resolution

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YoJa_3107936
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Hi everyone

Regarding BGT60TR13C, I found out how to calculate the distance resolution from "Radar SDK Documentation",
but I have not found the description of angular resolution.

YoJa_3107936_0-1669248679691.png


Could you tell me how to calculate the angular resolution?

 

Thanks

Yang

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1 Solution
Neo_Lu
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Hi, 

Neo_Lu_0-1669266516906.png

As shown in the picture, Rx1 and Rx3 & Rx2 and Rx3 forming a "L" shape array, and can detect angle from two directions with same 

Neo_Lu_1-1669267477841.png

 λ =  1/f = 1/(60GHz) = 5mm;

d = 2.5mm;

N = 2.

So, the 

Figure_1.png

Hope that will help you,

Neo Lu

 

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Neo_Lu
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Hi, 

Thank you for your question.

Neo_Lu_5-1669256560666.png

As shown in the picture, to realize the measurement of AoA(angle of arrival), we need at least 2 RX antennas.

Considering that the distance between the target object and the sensor is much larger than the distance between antennas, we can approximate that the beams arriving at the two antennas are parallel, so the azimuth of the beams can be calculated as:

Neo_Lu_1-1669254634567.png

α:"angle of arrival, " ∆φ": phase deviation", λ:"max wavelength," d": antenna spacing".

When we talk about the angular resolution, we should know that we detect the angle by measure the "phase deviation". In other words, the angular resolution depends on the measuring resolution of "phase deviation".

Neo_Lu_4-1669256335249.png

Finally, the angular resolution can be calculated as:

Neo_Lu_9-1669257534892.png

Hope that will help you,

Neo Lu

 

YoJa_3107936
Level 5
Level 5
Distributor - Macnica (Japan)
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Hi Neo

Thank you for your advice!

Could you tell me how to calculate the angular resolution

when the three antennas R1, R2, and R3 are L-shaped?

 

YoJa_3107936_1-1669265164739.png

Thanks

Yang

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Neo_Lu
Moderator
Moderator
Moderator
50 replies posted 5 likes given 100 sign-ins

Hi, 

Neo_Lu_0-1669266516906.png

As shown in the picture, Rx1 and Rx3 & Rx2 and Rx3 forming a "L" shape array, and can detect angle from two directions with same 

Neo_Lu_1-1669267477841.png

 λ =  1/f = 1/(60GHz) = 5mm;

d = 2.5mm;

N = 2.

So, the 

Figure_1.png

Hope that will help you,

Neo Lu

 

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YoJa_3107936
Level 5
Level 5
Distributor - Macnica (Japan)
100 sign-ins 50 sign-ins First like given

Hi Lu

Thank you for your answer.

Thanks

Yang

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