{"id":24626,"date":"2017-03-11T07:29:07","date_gmt":"2017-03-11T11:29:07","guid":{"rendered":"http:\/\/swling.com\/blog\/?p=24626"},"modified":"2017-03-11T09:08:37","modified_gmt":"2017-03-11T13:08:37","slug":"cornell-engineers-invent-two-way-radio-on-a-single-chip","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2017\/03\/cornell-engineers-invent-two-way-radio-on-a-single-chip\/","title":{"rendered":"Cornell engineers invent two-way radio on a single chip"},"content":{"rendered":"<p><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/12\/Spectrum-Waterfall-SDR.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-22683\" src=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/12\/Spectrum-Waterfall-SDR.jpg\" alt=\"\" width=\"640\" height=\"245\" srcset=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/12\/Spectrum-Waterfall-SDR.jpg 640w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/12\/Spectrum-Waterfall-SDR-300x115.jpg 300w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/12\/Spectrum-Waterfall-SDR-624x239.jpg 624w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/a><\/p>\n<p>Many thanks to <em>SWLing Post<\/em> contributor, Tom Ally, who shares the following news via <a href=\"https:\/\/www.news.cornell.edu\/stories\/2017\/03\/engineers-devise-two-way-radio-single-chip\" target=\"_blank\">the Cornell Chronicle<\/a>:<\/p>\n<blockquote>\n<h2>Engineers devise two-way radio on a single chip<\/h2>\n<p>Two-way communication requires, of course, both send and receive capabilities. But putting them in the same device requires a filter between the send and receive circuits to provide signal isolation.<\/p>\n<p>Without a significant filter, communication would be impossible.<\/p>\n<p>\u201cYour transmit signal is [10 to the power 14] times stronger than your receive signal,\u201d said Alyosha Molnar, associate professor of electrical and computer engineering (ECE). \u201cThat\u2019s 100 trillion times stronger \u2013 that\u2019s a really hard problem.\u201d<\/p>\n<p>But researchers in Molnar\u2019s lab have offered up a solution.<\/p>\n<p>Molnar and collaborator Alyssa Apsel, professor of ECE, have devised a method for both transmitting and receiving a radio signal on a single chip, which ultimately could help change the way wireless communication is done.<\/p>\n<p>Their work is described in \u201cA wideband fully integrated software-defined transceiver for FDD and TDD operation,\u201d published online Jan. 27 in the Institute of Electrical and Electronics Engineers\u2019 Journal of Solid-State Circuits. Doctoral student Hazal Y\u00fcksel and Dong Yang, Ph.D. \u201915, are co-lead authors.<\/p>\n<p>Separating the send and receive bands is difficult enough, but the problem is compounded by the ever-increasing number of bands in the latest devices. From GPS to Bluetooth to Wi-Fi, each band requires a filter to stop the strong transmit signals from drowning out reception.<\/p>\n<p>Molnar and Apsel have come up with an ingenious way to separate the signals. Their idea lies in the transmitter \u2013 actually a series of six subtransmitters all hooked into an artificial transmission line. Each sends its signal at regular intervals, and their individually weighted outputs are programmed so that they combine to produce a radio frequency signal in the forward direction, at the antenna port, while canceling out at the receive port.<\/p>\n<p>The programmability of the individual outputs allows this simultaneous summation and cancellation to be tuned across a wide range of frequencies, and to adjust to signal strength at the antenna.<\/p>\n<p>\u201cIn one direction, it\u2019s a filter and you basically get this cancellation,\u201d Apsel said. \u201cAnd in the other direction, it\u2019s an amplifier.\u201d<\/p>\n<p>\u201cYou put the antenna at one end and the amplified signal goes out the antenna, and you put the receiver at the other end and that\u2019s where the nulling happens,\u201d Molnar said. \u201cYour receiver sees the antenna through this wire, the transmission line, but it doesn\u2019t see the transmit signal because it\u2019s canceling itself out at that end.\u201d [&#8230;]<\/p><\/blockquote>\n<p style=\"text-align: center;\"><strong><a href=\"https:\/\/www.news.cornell.edu\/stories\/2017\/03\/engineers-devise-two-way-radio-single-chip\" target=\"_blank\">Continue reading on the Cornell Chronicle.<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Many thanks to SWLing Post contributor, Tom Ally, who shares the following news via the Cornell Chronicle: Engineers devise two-way radio on a single chip Two-way communication requires, of course, both send and receive capabilities. But putting them in the same device requires a filter between the send and receive circuits to provide signal isolation. [&hellip;]<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":true,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[545,836,3,26],"tags":[6027,5204,6026,4009],"class_list":["post-24626","post","type-post","status-publish","format-standard","hentry","category-ham-radio","category-new-products","category-news","category-radios","tag-cornell-university","tag-innovations","tag-radio-chips","tag-tom-ally"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-6pc","jetpack-related-posts":[{"id":53301,"url":"https:\/\/swling.com\/blog\/2022\/07\/ken-reverse-engineers-the-apollo-spacecrafts-fm-radio\/","url_meta":{"origin":24626,"position":0},"title":"Ken reverse-engineers the Apollo spacecraft&#8217;s FM radio","author":"Thomas","date":"July 11, 2022","format":false,"excerpt":"Many thanks to SWLing Post contributor, Paul, who shares the following post from Ken Shirriffs' Blog: Reverse-engineering the Apollo spacecraft's FM radio How did NASA communicate with the Apollo astronauts, hundreds of thousands of miles from Earth? The premodulation processor1\u00a0(below) was the heart of the communication system onboard the Apollo\u2026","rel":"","context":"In &quot;Articles&quot;","block_context":{"text":"Articles","link":"https:\/\/swling.com\/blog\/category\/articles\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/07\/Apollo-relay-modes.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/07\/Apollo-relay-modes.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/07\/Apollo-relay-modes.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/07\/Apollo-relay-modes.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/07\/Apollo-relay-modes.jpeg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":45501,"url":"https:\/\/swling.com\/blog\/2020\/09\/faulty-tv-to-blame-for-18-month-broadband-outage\/","url_meta":{"origin":24626,"position":1},"title":"Faulty TV to blame for 18 month broadband outage","author":"Thomas","date":"September 22, 2020","format":false,"excerpt":"Many thanks to SWLing Post contributor, Jeremy, who--in light of our recent discussions about RFI--shares the following news item from the BBC: The mystery of why an entire village lost its broadband every morning at 7am was solved when engineers discovered an old television was to blame. An unnamed householder\u2026","rel":"","context":"In &quot;Ham Radio&quot;","block_context":{"text":"Ham Radio","link":"https:\/\/swling.com\/blog\/category\/ham-radio\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/09\/Flat-Screen-TV-RFI-e1600785553370.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/09\/Flat-Screen-TV-RFI-e1600785553370.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/09\/Flat-Screen-TV-RFI-e1600785553370.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/09\/Flat-Screen-TV-RFI-e1600785553370.jpeg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":42205,"url":"https:\/\/swling.com\/blog\/2020\/03\/radio-waves-plant-powered-satellite-comms-bbc-pips-filter-basics-and-replacing-shortwave\/","url_meta":{"origin":24626,"position":2},"title":"Radio Waves: Plant-powered Satellite Comms, BBC Pips, Filter Basics, and Replacing Shortwave","author":"Thomas","date":"March 6, 2020","format":false,"excerpt":"Radio Waves:\u00a0 Stories Making Waves in the World of Radio Because I keep my ear to the waves, as well as receive many tips from others who do the same, I find myself privy to radio-related stories that might interest\u00a0SWLing Post\u00a0readers.\u00a0 To that end:\u00a0Welcome to the\u00a0SWLing Post\u2019sRadio Waves, a collection\u2026","rel":"","context":"In &quot;Digital Modes&quot;","block_context":{"text":"Digital Modes","link":"https:\/\/swling.com\/blog\/category\/digital-modes\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/11\/CCRadio-EP-Pro-Dial-Accuracy-Close-Up-1024x524.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/11\/CCRadio-EP-Pro-Dial-Accuracy-Close-Up-1024x524.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/11\/CCRadio-EP-Pro-Dial-Accuracy-Close-Up-1024x524.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":2296,"url":"https:\/\/swling.com\/blog\/2011\/12\/silabs-brings-shortwave-to-car-radios\/","url_meta":{"origin":24626,"position":3},"title":"SiLabs brings shortwave to car radios","author":"Thomas","date":"December 3, 2011","format":false,"excerpt":"Silicon Labs, a manufacture of DSP (Digital Signal Processing) chips that are in many of the shortwave radios we feature here on SWLing.com, is now taking their technology to car radios. They have announced the\u00a0Si476x chip family which features\u00a0AM\/FM, longwave, shortwave (SW), NOAA weather band, FM RDS decoding and AM\/FM\u2026","rel":"","context":"In &quot;Manufacturers&quot;","block_context":{"text":"Manufacturers","link":"https:\/\/swling.com\/blog\/category\/manufacturers\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2011\/07\/silabslogo.gif?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":20328,"url":"https:\/\/swling.com\/blog\/2016\/08\/medium-wave-dx-cbc-radio-1-gander-1400-khz-remarkably-clear-signal-in-oxford-uk\/","url_meta":{"origin":24626,"position":4},"title":"Medium Wave DX: CBC Radio 1 Gander, 1400 kHz, remarkably clear signal in Oxford UK","author":"Clint Gouveia","date":"August 3, 2016","format":false,"excerpt":"CBC Radio 1, Gander, heard in Oxford UK A really great signal from CBC Radio 1 Gander - the best I've ever heard on this or any other medium wave frequency, complete with a clear station ID and very much out of season so-to-speak. I can't remember recording any Medium\u2026","rel":"","context":"In &quot;AM&quot;","block_context":{"text":"AM","link":"https:\/\/swling.com\/blog\/category\/am\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":20283,"url":"https:\/\/swling.com\/blog\/2016\/08\/pauls-review-of-the-kaito-ka108\/","url_meta":{"origin":24626,"position":5},"title":"Paul&#8217;s review of the Kaito KA108","author":"Thomas","date":"August 4, 2016","format":false,"excerpt":"Many thanks to SWLing Post contributor,\u00a0Paul Dobosz (K8PD) who shares his review of the Kaito KA108. Paul originally wrote this for the\u00a0Michigan Area Radio Enthusiasts and has kindly allowed us to post it here: Kaito KA-108 Review by\u00a0Paul Dobosz (K8PD) Kaito just introduced a pocket sized DSP based MW\/SW\/FM receiver\u2026","rel":"","context":"In &quot;AM&quot;","block_context":{"text":"AM","link":"https:\/\/swling.com\/blog\/category\/am\/"},"img":{"alt_text":"Kaito-KA108-AM","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/01\/Kaito-KA108-AM.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/01\/Kaito-KA108-AM.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/01\/Kaito-KA108-AM.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/01\/Kaito-KA108-AM.jpg?resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/24626","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/comments?post=24626"}],"version-history":[{"count":0,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/24626\/revisions"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=24626"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=24626"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=24626"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}