Michael Gutierrez Project Mentor: Vikram Ravi
Understand the goal: block diagram
<aside> 💡 16 antennas
400-500MHz (?)
LNA - part number? — what’s the impedance match
long coax — do we need more gain for this?
more gain after coax, plus maybe bandpass
then digitizers — 6 snap boards with DSA110 firmware
40Gb converge to 1 server for beamforming — maybe direct connect instead of using a switch
parameters: Aeff, BW (after rfi), Tsys (→SEFD=2kTsys/Aeff), beam shape (solid angle, func of freq)
</aside>
design the antennas first cause longest lead time to build
probably get an off the shelf lna and impedance match
Start with LWA antenna design, compare to dipole of appropriate frequency (use 500MHz)
HFSS or CST software - ask saren or kiran
⇒ Saren recommends CST for easier learning curve, I need a windows machine to run it on, will probably use the beefy one in the shed on Moore Roof and remote desktop in
3DS login info from Saren doesn’t work anymore… need to ask Kiran about new licenses.
vikram will add me to radio slack ✅
check out the LWA memo series
LWA memo series: https://leo.phys.unm.edu/~lwa/memos/index.html
Basics of the antenna design are here: https://leo.phys.unm.edu/~lwa/memos/memo/lwa0188.pdf
ovro trip wed-thurs?
ask stephanie about if i can drive the cars
need to do RFI measurement asap
<aside> 💡 rough numbers — sensitivity
beam solid angle of around pi
→ Aeff~lambda^2/beam ~ 4lambda^2/pi for 500MHz ~ 0.1m^2 times 16 antennas
Tsys ideally around 100K (worst, including everything)
→SEFD = 2polarizations1.4e-23Tsys/(16antennas*.1) ~ 150kJy
can detect sun, and crab giant pulses (microsecond), and pulsars (.2Jy)
sensitivity in a millisecond = 150k/sqrt(10^82polarizations10^3) ~ 300Jy
</aside>
next go out with the antenna and measure properties/calibrate Tsys with the sky
stretch goal: interferometry between elements to model mutual coupling (which will modify the impedance match?)
timeline: settle on parts next two weeks
to get parts ordered: ping stephanie on slack — moffett PTA
ask saren about spectrum analyzer friend ⇒ Saren’s rec: SSA3021X Plus ORDERED!
From Saren: keysight presentation on spectrum analyzers
https://viewer.diagrams.net/?border=0&tags={}&target=blank&highlight=0000ff&layers=1&nav=1&title=122b_peryton_detector.drawio#R7V1bc6M4Fv4t%2B5Cq3QdTkkBcHnPp7lRtejZVmZ3p2ZcUsbHNBBsPxp1kfv1KgDDogkm4OTapSmILIWOd71x0LtKFfr16%2FRa5m%2BX3cOYFFwjMXi%2F0mwuEbBORv7ThLW3ACKcNi8ifpU1g3%2FDg%2F%2B2ljZC17vyZt83a0qY4DIPY35Qbp%2BF67U3jUpsbReFLuds8DGalho278ISGh6kbiK2%2F%2B7N4mX0tDPbtt56%2FWLJPhiC7snJZ56xhu3Rn4UuhSf9yoV9HYRinr1av115A5648L18VV%2FMHi7x1XOcG58%2B75%2BurJ6j%2F9f3bj4fXXy7D22hiZQ%2F30w122Te%2BQGZABryah2Rc8tjxWzYX5l%2B7kF2YbBNKXZIOeENofbW%2FTF4t6P%2B7%2F1zQJ7qyZlcrNiZ5unTYtEs2MfknoNh7pe3LeBWQBkheuoG%2FWJPXU%2FItvYg0%2FPSi2Cf0ucwurPzZjN5%2BFXnkmdynZChA3m9Cfx0n1MdXF%2FiGjrWLw%2FS5k6G3cRQ%2Be9dhEJJxb9bhmo4y94OAa8pmiHyu96qce5hTlHCCF668OHojXbIbdMdOb8m4AOrZ%2B5c9poyMU5YFOCEzQ3KG4kU%2B8p7Q5EVG63fQ3bRGuvdAdwMYJbpbpuY4YP8Dh0UBQ2EDFOgKFPzqeXWJTwTjhr6MPTrrL0s%2F9h427pQ2vRCdUsZFolhs%2BuIte9EN5ZDOcSxTSAVaIUdCK70jWmGopNVGSqjAX3sT9miUVIlqwlJqvZfqhoLqt%2Fdf6QdBqh6JnqZSAtBPBd9v%2F1bCIW%2FenJ180BmqmHywNN0ScGYCEWcMDu3jzBhxdno4A5izPywND4szQ42zphYIG8el3yXy5qUxlnFMlw6X9OnR15eXF23lr%2F2pH013frzVpuGKImQ235J%2F%2F%2Ft69evE%2FEaMGY20iB%2BUX8%2Bh5UrgdpaWD9L1EuIcR4OizavLNGhX1o5MgXLUYFN95z55wT2ZutgP6ZQ%2FhXFMgEFmkC3i6HzP3O3Sm2VvBLIVSMpTMA436ViJ3bN6XdCls%2BYFZAEb0X5a5M78UHO9yHeDx8mjS4Zcr91H1A5tsFUijSFaNpaELvnKtn1RoAuE8GZkFZ69DaN4GS7CtRt82bdeReFuPctnf9%2FnLqSTm0z7n14cv2UuBcoJZaJ4r378o%2FD6j2wo%2BvrmtfjmrfDmntCEfGtK4bRtTWbgR%2FFNMo6G2dv9UMm7fKz17JK6J%2FZMR1q%2B%2BnTikuvpjNBpqCYymbVwF029iunNYB670cKLK%2FpZctBEXuDG%2Fs%2Fyc7SOAXSYOVPpxbwwsExNnpnmQfgyXbpRrLnrdRi7lJET%2FmF8GnjzxHrhOD1KAZ%2FKUi%2F68tNLRSpsh%2FUc8%2BCqwoAi75ldsZ4uTPt9SG%2BCwuyfqqKCAHEmuEARLLGL9K4oYiooIvLDuVAEMh%2FyUCRhFskR6KdUr3xMQ8GShjqgn1rUPxDXVEDQHFQDiS7R%2Fz6IBjudksQ87I71lDyUBTmymy%2Fy0EKRKhUIVnLcBGgAmGWrMPvI2nOfDX5Pv02hSzifbwnReeLkz9BAdeEhuRI05Mqi6LxA%2Bnw%2BR9OpIGfJlZn5ZGKzC45swGgcsdmaD2mo7GcggjpvYuOkYiC7tQNYiAq0Lb%2FCl3jpRWuK5npr%2Bx5ERWK%2BXrnT50WC7LrK%2BMOCRFcgZy9IoG3CEgYmDSVJ%2BcmzQTkve3dShimvyoXJsxdPlxmN3O0mjUPP%2FVcqaKQrCbUbobikkZlc%2FHpFAJHSdSF3Qghg5AQTANC2byQLLPfvXeRpWy%2F6mdxWhuYVwdM1FYvkb%2F5LAIuu6TUNwOSKBvQDHRxL0UEv3ym5CBUXccWNuOI%2B06q4MbmoutOxD3xb1kHxbaF8LqtNhXd4g8ohSgRFa9uRWNvMXGrfTScLTUtdAQWYmslPmX9US3vOA7DduFN%2FvbhL3t1AXMme4S6m8Y7rPNsESFgjIvJYW3hrL3IDDe4e6ftHJadosApZsApZn4kL7KpntaXP2hbCOctWx6IjGspiHxB3BHEkul0EiFOFvmmkwA%2BtssuuKGQaIt%2Bb4qR0tsqGMsONmxR%2FlaRrSZRswbwmn%2BVvtl7B4q60vqgJl5n7ECn1JO1VkDe6aUDDqRQV2bPe%2BKsFmY%2FAfyJ%2Fp7vVLtjR0FIqDh6fCL0eyVMSQbH9uagL9wpQifRmiXe1qIu6oi4jZoG6Nw%2FU2L4OwumzQOgmvi1ZBkl53df%2BJLMVkDDJMrnSnaNKFlOVyhWp7y6kmjB%2BOzRJLcgeA2lcRhwDY9HH52gAiclSpZlEmm4VuoCuJHYNm%2BRYYodBuPCnjws39rba024%2B96LaYcMKUCnlCk8BQxQ0WEa5ztSIOk%2BKWHpr6fp%2FmvIBFUfR4umf1AAhL9m%2FfyXTBxInwdxd%2BcFb2vXWC356lDaF69nY9PI6jFZuULj20418l%2FwnhHRjsnjaHug3dTeqLi%2BFdBsDpNwKAi8m6Jlk9qx4Zxhtlu46GzLFBKBydpLBjzbnCGTXfCI219kngcwvkl6JIzLYnIzPPilzOVDKJ2nXhY95CaNZ%2BcHysch3eXr2yXB0zNSun2TYKfVLpHoyRj6%2FmWxnDzTzpmGUBPom8dKfPq%2B9bfYU%2FpowI5sGvm%2BBZJX9CiAp9ZsHoRvzczDzt5vAfWPd6ZqBvPiHv9qEUeyuY6l%2Fqa3sqLtf6NULdKWDmToRJW9O2aI6P%2BVAVmb70iW3UjXOoyhLkNNlxjvULKMrPVvDKdS5%2Fa5z%2Fnos2u91NGhX4RRZavG5aEyFk7QcWRlMQYqW%2BKggRwU5KsgjVZDVERdm7iplC5LoRmTkWrR93WgLU9RnWFazWCz2j8IlRVw2z92jrst3JEck7%2FiIbvq124nPZovhwxkTTXP2FIFcgDVo7n8sLkRA7Iqeo7qs1KagtGCa7A9ogrcMcZ8vScOu5HSapGE4ZUo0ja32kKUBpMTpTRxAqyAOmqT30nhKQUTAoUWEVVdENM31aJZfKnpjDPDt6TQYVgfyqS0kQzioGYOyofhQVIcMK8amHn65vFfZPSeXfeqU61Z0jCSVUrIFW3dVuqJX%2FyENJg9Kk2JEbObN3V2Q59OLCUn7Di2QiOUDV2QsYL1HAmHRtTFUJmJRwSGnqOGMgxquZAHXKGDpVsGx%2BuuDCg4rpHBTG9g0NceCtg4cGzsQG1zlhm5rDtYBhqahEzFv2L3aw8agkHtXSrocXxXoMnpAV13rSVfY5P1YT8aga%2BnPT%2BW6IsQY1EY2xLWtQPauowl5Ol9FNEFWmKYbWlchd0MWZPlsm5PUsnYqUKHO2iyTC0qM1F63JzGap92rvLXtlfP%2FsPEEom%2BTB3VFf7HLedb1fwSNrHy3KC16tcDV25jV3LQkkZnVm5Y0xt9vt18nENhAiT6eY9hueKwfLN4i%2BVbqEZWRvZo8WHh0ZWDkUBhFxkPqrVg%2BWO098yOiCR9nbuwq5HUtJji0bQ8vfsUyblmFKuwqpotlCcUj%2Fkf8d4X%2F8rZV0AIa1AdmgeMpBy2ulJCtOaUf8%2BJdThmtXLWtWfrQjhlmlx92zChSuxo6ZnTgaABDZKP0LxcAdxzNgQZGTva3PHzHbhlco4bhBLKeDkgHq%2ByfhQBrjA7FpD1J%2BQG01WhoJh2a73Sp3m3sClWlkXyGhUGU7ZBTkhYNQVBWEYr9v%2FpcJLC65PNmTtPhMmqhiTVbzBvqlT1ZRGdkz77Y07R4GGCJiO6VPdVrmBY8PyaY%2FEY%2FoebK46PrhMIHvWtB8BlQ2A3smLFQhJ3dJ%2BzU%2B5COsDsV2HHGCNyXlQwGuxolJB%2Fc0qOWnyCM2plaA5bzZSBAh7a4Z1Wq5YzkruZZHZdo6hNqT0x8%2FT5Byf7Vyn2G8w4H%2FEl1UtVPjr0NbisDmTXb50bDZhu1T8fA24ALCku2iOiXmWWR8pGZT4yZOV1tIE2iRHplaEvcDnewPByrbiLOPoPvKPLV65a0mINmXFniaoCeZyQh%2FqfLVreq%2BW4CNEfnMmtb2rqvt8362FryGPgUnTqftrKH6GUUuW%2BFDhkjKKFkMLnPcr8tXATSwf4wS0tR9ucTq8r9yYv0iduFrej5Ohmhgw4KHcMqryBRKzJHLsh6EEHiuh6i3wRifjC6vyVsGSfHGHQU2c8LJyrLX%2FTcfdLLjgXWoPuv71OfG5cQHpWkt%2BrG8RtnR39I0iOzvEEYCz6pJDcyrKr%2BHUlua0TmgMhsXJ3RDjIP2BRN%2B8OsQEDZn5PZXP%2BOkF%2FDxyXb%2BfpYAuwrfzslX9Nde%2BFuqz25dGeYt4fYnT635MbgtlWGwJQlwRgS9xnszI2hdp81jbJfkvlb79w4jEgn%2FZOH21shP79xmQ214jaJEpdWr0XFtjpj%2FmhcqVe%2FTx7037HSk7q%2FPjpSZRA0eQhKds7r043K4jKjzqipM8yBFYaNRoUxmMKAhq7Rs5TzHzSwxlDnZ40a40QwyGsMspQYPPhm19jU%2FFg0RDFtNwhfNu52%2B0hoxXaMbEwhDAQK0XWFVSwwEakl8dVBK6dr%2BwRrXrit0hp3ybnvN9cTw6o86v1cGNbBHBwsrBlimj2WnfTQGb8ergRvr67P%2FZjaaZrWaeG7e4rBykryUqcD%2BuYs4YuBZJFsVAsz5uXtBcqObJF8tqqHTwazNMcukEpS3dOz4nHURz%2BMiqdlxcPvhmVqhsisveodttXiqHdGvXNIlHE1wwYiVlOlKOtX7dQ4Hu4Y1U6rhYoYC4WKwNFKxoFE4%2FRZtOjIFqZj0WJ3RYsYC9VjSbWJCIM%2B6xadNip5Pj%2B38taho7Fk0sH4s7uTwEf%2BlIOAryxH0sryXrlTdnLfWN55PDDsAneWfEeDPus7HfWGIyPuTgZ3gj0CDU0H1d74XlFYY2vZc464m4B3oNNFxtB5WhCok3PGuHu7PGyysDrzQBtHlaYFgdqnOUbdTwSB3EnY4l6ivcbbIeOIUWnUVhqSTWx61hjq5JxRY3SrMaBhHlWeFgRqv%2BSoMk4EglyFCB5%2BjwQIRj8oPTQIHnnUAoLRLdqvW9SURLKGD1tAIPOMnh2%2Fsl0vjyhuAcG4WXHfHMpHr4YPXBC9oUTB6EE%2BBhx2AbwjiFzkh5mMwDtl4Ak2yZGFLiAcqwUrSWgBMfoEho9dsMN4R09U50xsMU8Pi13g44pdwLFi8NQRyB0E5QzthII1igVHpVE2OcWDu3rWGN3VC44ao1pjQMM6rtgFVDsnR5VxGhDkzw7E%2BvCxC%2FhJfaFLMjmtV%2FpZwmkZumxZIdv5nVl8HVBI7ROtKxhUSuI2qe0jkm6iEwlYru47TxbFZQAcXleY%2FSqJT3AMwMPt%2FSQ5AFWhJPbXRyUhQSC3EblsXdFnRR5En7QSvCMFIQS5LTGq3a9%2BQDJv4agfOtIPAv2TfYIq1xH9qgjGnqOKOFkQmrpwgiWWriT6VRQ1arfP2QFlQ0OIWkiXF%2F36oJA6Z3L0QbXLuDYL7LHVhX1cUQukdkcejeoYXVDNEFjOumAbOQzmfmInZxzDuUW1jy0yrYsjOjMAMuocPDQgJb4IjoYHztgO1kwHm5hGVBzuVFTkOJqFDFO3TCL%2BMAMcGz195mzAPZjeezCBw9IUmWbNvoXq4AC%2BvwGqj9iAFm7UX7d6OEwpB8JogSmkn7h6hwfP7O3ZGlNv2jBaYy3rQu6wEdsqW2NicLhna6y533%2B0xo4bgVY5Ju2IkOvXGkPNj0lRQe7h8vs9uXx99%2B9zlzuJs6bs5NcNyUlzvaac6lCY%2F2O1w6uP87L147LNQa%2B2%2BbvtZsjZzXb1oaJ8f905cKAXd6Q1178jO1hXu8CbirHLG%2FJM9EuduQyzy6s81WGZvYqw5hsBVFMdnT3VMY11iQW9fYCAvI1CSpS9pKDLx%2B%2FhjB4L%2FOX%2F
Tasks: