Tx Position of BGT60TR13C

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stjischl
Level 1
Level 1
5 questions asked 5 replies posted 10 sign-ins

Hi,

I am curious about the location of the transmitting antenna of BGT60TR13C.

stjischl_0-1706963411621.png

From the diagram in the application notes, we can see that the antennas are not in a perfect grid.
In fact Tx is breaking the grid in only one axis. It's on the same height as Rx2, but a different width that Rx1.

What is the reason behind that?

Thanks

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1 Solution
Deepa_V
Moderator
Moderator
Moderator
First comment on KBA 50 likes received 250 replies posted

Hi @stjischl ,

When oriented as in the figure, the radar sensor will emit vertical polarization. Thus, the E-plane is vertical and the H-plane is horizontal. The free-space wavelength of 60 GHz, denoted by lambda, is about 5 mm. The horizontal spacing between receive antenna 1 (Rx1) and receive antenna 3 (Rx3) as well as the vertical spacing between receive antenna 2 (Rx2) and Rx3 is lambda over 2. This enables angular measurements perpendicular to the chips surface providing a horizontal range of ±90° using Rx1 and Rx3 and a vertical range of ±90° using Rx2 and Rx3 respectively.

The other geometric changes were made considering the Directivity, Antenna gain, scan angle and maximum isolation between the transmitter and receiver antenna. 

Best Regards,

Deepa

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1 Reply
Deepa_V
Moderator
Moderator
Moderator
First comment on KBA 50 likes received 250 replies posted

Hi @stjischl ,

When oriented as in the figure, the radar sensor will emit vertical polarization. Thus, the E-plane is vertical and the H-plane is horizontal. The free-space wavelength of 60 GHz, denoted by lambda, is about 5 mm. The horizontal spacing between receive antenna 1 (Rx1) and receive antenna 3 (Rx3) as well as the vertical spacing between receive antenna 2 (Rx2) and Rx3 is lambda over 2. This enables angular measurements perpendicular to the chips surface providing a horizontal range of ±90° using Rx1 and Rx3 and a vertical range of ±90° using Rx2 and Rx3 respectively.

The other geometric changes were made considering the Directivity, Antenna gain, scan angle and maximum isolation between the transmitter and receiver antenna. 

Best Regards,

Deepa