{"id":121966,"date":"2024-04-07T05:03:03","date_gmt":"2024-04-07T05:03:03","guid":{"rendered":"https:\/\/www.controleng.com\/articles\/3d-reflectors-help-boost-data-rate-in-wireless-communications\/"},"modified":"2025-04-23T18:50:00","modified_gmt":"2025-04-23T23:50:00","slug":"3d-reflectors-help-boost-data-rate-in-wireless-communications","status":"publish","type":"post","link":"https:\/\/www.controleng.com\/3d-reflectors-help-boost-data-rate-in-wireless-communications\/","title":{"rendered":"3D reflectors help boost data rate in wireless communications"},"content":{"rendered":"<h2>3D reflectors insights<\/h2>\n<ul>\n<li>Cornell&#8217;s innovation addresses the challenge of transmitting signals across different frequencies without data loss, employing a novel approach to align signals in space and time.<\/li>\n<li>This chip, utilizing ultra-compact quasi-true-time-delay technology, nearly doubles the channel capacity of wireless arrays, promising faster data services and more efficient phased array systems for smaller devices.<\/li>\n<\/ul>\n<hr \/>\n<p>The next generation of wireless communication not only requires greater bandwidth at higher frequencies \u2013 it also needs a little extra time.<\/p>\n<p>Cornell researchers have developed a semiconductor chip that adds a necessary time delay so signals sent across multiple arrays can align at a single point in space, and without disintegrating. The approach will enable ever-smaller devices to operate at the higher frequencies needed for future 6G communication technology. The team\u2019s paper, \u201c<a href=\"https:\/\/www.nature.com\/articles\/s41586-024-07075-y\" target=\"_blank\" rel=\"noopener\">Ultra-Compact Quasi-True-Time-Delay for Boosting Wireless Channel-Capacity<\/a>,\u201d published March 6 in Nature.<\/p>\n<p>The majority of current wireless communications, such as 5G phones, operate at frequencies below 6 gigahertz (GHz). Technology companies have been aiming to develop a new wave of 6G cellular communications that use frequencies above 20 GHz, where there is more available bandwidth, which means more data can flow and at a faster rate. 6G is expected to be 100 times faster than 5G.<\/p>\n<p>However, since data loss through the environment is greater at higher frequencies, one crucial factor is how the data is relayed. Instead of relying on a single transmitter and a single receiver, most 5G and 6G technologies use a more energy-efficient method: a series of phased arrays of transmitters and receivers.<\/p>\n<p>\u201cEvery frequency in the communication band goes through different time delays,\u201d Govind said. \u201cThe problem we\u2019re addressing is decades old \u2013 that of transmitting high-bandwidth data in an economical manner so signals of all frequencies line up at the right place and time.\u201d<\/p>\n<p>\u201cIt\u2019s not just building something with enough delay, it\u2019s building something with enough delay where you still have a signal at the end,\u201d said senior author <a href=\"https:\/\/www.engineering.cornell.edu\/faculty-directory\/alyssa-b-apsel\">Alyssa Apsel<\/a>, the IBM Professor of Engineering and director of electrical and computer engineering in Cornell Engineering. \u201cThe trick is that we were able to do it without enormous loss.\u201d<\/p>\n<figure id=\"attachment_541497\" aria-describedby=\"caption-attachment-541497\" style=\"width: 1000px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-541497\" src=\"https:\/\/www.controleng.com\/wp-content\/uploads\/2024\/11\/CTL2403_WEB_CORNELL_COMPUTER-CHIP-real.jpg\" alt=\"The computer chip designed by Bal Govind and team. Courtesy: Cornell University\" width=\"1000\" height=\"563\" \/><figcaption id=\"caption-attachment-541497\" class=\"wp-caption-text\">The computer chip designed by Bal Govind and team. Courtesy: Cornell University<\/figcaption><\/figure>\n<p>This delay has previously been produced by phase-shifting circuits, but they can handle only so much data. That is a particular problem for wideband signals, in which the highest and the lowest frequencies can fall out of phase, causing the signal to blur, a phenomenon known as \u201cbeam squint.\u201d And building time delays into a tiny chip that can fit in a smart phone is no small task.<\/p>\n<p>\u201cMost of the way that time delay is constructed is literally by using a long wire that will enable you to delay a signal from point A to point B. And we need that delay to be tunable so that we can reroute this beam to different locations. We want it to be reconfigurable,\u201d Apsel said.<\/p>\n<p>Govind worked with postdoctoral researcher and co-author Thomas Tapen to design a complementary metal-oxide-semiconductor (CMOS) that could tune a time delay over an ultra-broad bandwidth of 14 GHz, with as high as 1 degree of phase resolution.<\/p>\n<p>\u201cSince the aim of our design was to pack as many of these delay elements as possible,\u201d Govind said, \u201cwe imagined what it would be like to wind the path of the signal in three-dimensional waveguides and bounce signals off of them to cause delay, instead of laterally spreading wavelength-long wires across the chip.\u201d<\/p>\n<p>The team engineered a series of these 3D reflectors strung together to form a \u201ctunable transmission line.\u201d<\/p>\n<p>The resulting integrated circuit occupies a 0.13-square-millimeter footprint that is smaller than phase shifters yet nearly doubles the channel-capacity \u2013 i.e., data rate \u2013 of conventional wireless arrays. And by boosting the projected data rate, the chip could provide faster service, getting more data to cellphone users.<\/p>\n<p>\u201cThe big problem with phased arrays is this tradeoff between trying to make these things small enough to put on a chip and maintain efficiency,\u201d Apsel said. \u201cThe answer that most of the industry has landed on is, \u2018Well, we can\u2019t do time delay, so we\u2019re going to do phase delay.\u2019 And that fundamentally limits how much information you can transmit and receive. They just sort of take that hit. I think one of our major innovations is really the question: Do you need to build it this way?\u201d Apsel said. \u201cIf we can boost the channel capacity by a factor of 10 by changing one component, that is a pretty interesting game-changer for communications.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cornell researchers have developed a semiconductor chip with 3D reflectors that significantly enhances the data rate for wireless communications, making it a key advancement for future 6G technology.<\/p>\n","protected":false},"author":419,"featured_media":121968,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"pgc_sgb_lightbox_settings":"","footnotes":""},"categories":[104049],"tags":[],"tracking-metrics":[],"display-location":[],"class_list":{"2":"type-post"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>3D reflectors help boost data rate in wireless communications - 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