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Further information about the 2D Scanning topology

Category: Hardware
Product Number: cn0566

Good evening.

I am interested in getting further information about the 2D scanning topology of the CN0566 as shown in this image from the hardware wiki: https://wiki.analog.com/_media/resources/eval/user-guides/circuits-from-the-lab/cn0566/ex3.png?w=750&tok=80e8c9

I am a student undertaking a project where I am attempting to follow this exact topology with two phaser boards and one Pluto. My understanding is that with the two antennas working in one plane each, with each connected to one Rx port of the SDR, I will be able to combine the data and calculate an azimuth and elevation result of a target. Have I understood that correctly?

The image linked above does not include a Tx antenna, but I am assuming that has been mistakenly omitted and that I indeed can use the transmit path? Is that correct? I believe I would still be capable of operating in FMCW mode, just I would be receiving two planes worth of data rather than a single plane with one antenna.

Thank you for any information and confirmation you can provide.

Many thanks,

Robyn

  • Please see this post post that offers all the information we have on using two units in this configuration:  
    About the location of the case: Two Phasers for 2D Scanning? 

    Regarding 2 D scanning, two Phasers could give you information on elevation and azimuth.  But it is not the same as a true 2D array.  Rather, if you have 2 Phaser kits, I would recommend soldering in the SMP connectors and building a custom patch antenna that uses those 16 elements.  Creating a 4x4 or 8x2 or 5x3 array.  

  • Thank you, I did see that post and actually originally commented on there, but then thought it was better to start a new post rather than piggyback.

    Unfortunately I cannot modify the equipment as I am just borrowing it, on top of which I am running out of time. Are you able to perhaps expand on what you said above please? I take it I am missing something obvious about how RADAR works in what you said. To my inexperienced mind, obtaining one frame of data from an elevation antenna and combining it with a frame of data from an azimuth antenna would enable me to create a solution for both Az and Elev. How is that different to a true 2D array.

    I have been loaned two complete phaser kits, so I actually have 2 plutos. Is it worth me investigating whether I can use them in parallel and stream data to a PC where I create a combined result? i.e. Rather than trying to combine in one Pluto, use both for Rx (only 1 Tx and still LO synced) and pull the data together in MATLAB?

    Thank you,

    Robyn

  • Sure, I'd give it a try.  But you'll have two 1-D arrays.  Not a real 2D array.  So yes you should see something in az and el, but its not the same as being able to scan across both dimensions.  But if its all you can do, give it a try.