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CMOS Circulator Chip Enables Single Antenna

Researchers double WiFi throughput
4/18/2016 09:04 AM EDT
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R_Colin_Johnson
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Re: 2X Speedup with Full Duplex WiFi
R_Colin_Johnson   4/19/2016 10:26:48 AM
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Yes magnetic circulators are old-school now that they are on-a-chip. I wonder if the inventors could patent their technique or even bothered to. Others should be able to find all sorts of downsizing and new applications for solid-state circulators. Thanks for the comment

Terry.Bollinger
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Re: 2X Speedup with Full Duplex WiFi
Terry.Bollinger   4/19/2016 10:14:13 AM
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This is downright cool, a nice example of how clever use of information tech can sometimes replace much larger classical designs. I would never have thought that a digital chip could replace a circulator, yet there it is. Wow!

R_Colin_Johnson
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Re: 2X Speedup with Full Duplex WiFi
R_Colin_Johnson   4/18/2016 9:12:49 PM
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Yes, the researchers were hush-hush on military applications, but you can bet they want to cash in on fewer antennas and wider bandwidth with the addition of a single chip. With all their drones and such, they also have two-way comm that is busy both ways at once making full duplex a natural.

realjjj
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Re: 2X Speedup with Full Duplex WiFi
realjjj   4/18/2016 6:00:31 PM
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Yeah got all that. I also imagine that one of the reasons DARPA funded this is because the military needs mesh networks. Comms are very important in the battlefield nowadays.

R_Colin_Johnson
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Re: 2X Speedup with Full Duplex WiFi
R_Colin_Johnson   4/18/2016 5:42:29 PM
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Yes, the carriers are testing too, but its harder to do than you might imagine, since the outgoing signal is can be millions of times bigger than the incoming, plus all the echos,  interference and all. In fact, these researchers are also thinking about 5G, they say, they're just doing WiFi first because its here and easier with which to work. Cellular of all types, however, are in their sights.

realjjj
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Re: 2X Speedup with Full Duplex WiFi
realjjj   4/18/2016 5:33:58 PM
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I wouldn't mind a wireless repeater with full duplex and if it was up to me i would hide it in a functional light bulb to not waste a wall socket. Maybe in some scenarios a mesh network would also be cost effective.

Granted, the real upside would be with 5G and pretty sure some carriers are testing full duplex.

R_Colin_Johnson
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Re: 2X Speedup with Full Duplex WiFi
R_Colin_Johnson   4/18/2016 4:57:22 PM
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Right On! Not only does a single antenna minimize the bill-of-materials (BOM) but will also allow wearables to be shrunk even smaller and made even cheaper than every before.

elizabethsimon
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Re: 2X Speedup with Full Duplex WiFi
elizabethsimon   4/18/2016 4:44:26 PM
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Eliminating the need for multiple antennas is a big deal. That's really their best selling point because it reduces upfront costs. Any data speed up is just an added bonus

R_Colin_Johnson
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Re: 2X Speedup with Full Duplex WiFi
R_Colin_Johnson   4/18/2016 4:21:53 PM
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Very good point, Elizabeth, and one of which I had not thought. The inventors indeed are basing their 2X speedup prediction on equal use of sending and receiving channels. Then again, they now have funding from all three of the big WiFi and cellular chip makers, who may be as interested in eliminating the need for two antennas as much as going full-duplex. What's your opinion on the antenna issue?

elizabethsimon
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Re: 2X Speedup with Full Duplex WiFi
elizabethsimon   4/18/2016 4:03:07 PM
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Double speeds by going full-duplex assumes that an approximately equal amount of datat is to be sent on each direction. Unfortunately, most data use is heavily one sided so actual speed up will not be as great. Still anything that increases the efficency of spectrum use is good.

 

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