Overcoming mmWave design challenges with next-generation circuit breakers التيار


0

The rollout of 5G has always been intended to be incremental; Starting in the sub-6 GHz band and expanding over time to the millimeter wave band at 24.25 GHz and above. At this higher end of the 5G spectrum (24.25 GHz to 86 GHz), a massive leap forward in data speeds, capacity, quality, and lower latency will push cellular technology into new markets. However, the transition to mmWave frequencies faces a dilemma, which may halt long-awaited technological breakthroughs, such as smart cities, autonomous vehicles and the Internet of Things. It will also have far-reaching repercussions on the military and defense. “It’s a huge technical challenge we’re facing,” said Fred Daneshgaran, of California State University, Los Angeles, a professor specializing in radio frequency design, telecommunications, and quantum communications. “The problem is that as you go up in the spectrum, it gets harder and harder to build important components like vortices that can operate at those frequencies,” he explained. “The only way to support billions of users at higher data rates is to keep using higher and higher frequency bands, so the components have to catch up.” Without progress, the deployment of systems capable of operating at a higher level on the spectrum – within the terahertz system (100 GHz to 10 terahertz), where 6G and 7G will operate – is also at risk. Crucial to Communications Infrastructure In late 2020, the US Department of Defense discovered that national security would also be affected if the mmWave component issue was not properly addressed. It soon announced $600 million in prizes for 5G trials and testing. Given this momentum, microwave components such as antennas, waveguides, insulators, and circuits are now being developed capable of operating broadband at mmWave frequencies of up to 330 GHz and beyond. “One component that is particularly critical to communications infrastructure is blood circulation,” Daneshgaran said. Antenna systems capable of transmitting and receiving a signal are usually expensive because they are mutual devices. To keep the signals separate you have to put something like a gyro on the front end; Otherwise, you’ll need two different antennas”. Basically, a spindle is a three-port device in which the power entering one port is transmitted to the next port alternately. Hence, any signal entering into port 1 goes out from port 2, and any incoming signal into port 2 exits to port 3. This problem of duplication at mmWave frequencies is not only a problem for communications applications but also for radar technology, which relies on struts to separate the signal on the transmission path from the signal on the receiving side.Overcoming performance challenges in a recent attempt to design and build a research and development system For a major commercial contractor, the lack of a rotor capable of operating at 120 GHz has stopped the Daneshgaran team in its tracks. “In theory, you could design one, then simulate its performance, and it would be fine,” he said. “However, making it is actually more of an art than a science. It is very difficult to build spreaders in the mmWave range. “Initially, we couldn’t find anyone capable of producing distribution devices in the bandwidth we requested, let alone the high isolation and broad bandwidth we wanted,” he added. In an ongoing search for a diffuser with the necessary attributes, Daneshgaran and his team learned about Micro Harmonics, which developed a circulator for mmWave systems while working with NASA on a number of SBIR projects. Micro Harmonics Corporation specializes in components for mmWave applications and has developed an advanced line of distribution devices operating from 25 GHz to 150 GHz. “Micro Harmonics precisely tuned the design to meet the performance characteristics we needed within the very precise range we were going to be working on,” said Daneshgaran. Whether it is for high speed data transmission and reception or for target detection, isolation is a key parameter. “If the rotator doesn’t have good port-to-port isolation, you get self-interference – which means the signal I’m trying to send is interfering with the signal I’m trying to receive,” he added. “So you want as much isolation as possible. Micro Harmonics have shown some pretty cool isolations,” Daneshgaran said. “At the frequency we worked on, we realized close to 30 dB of isolation from port to port, which is a lot. It’s usually very hard even beyond 20. “The rotator must also offer broad bandwidth, which is a big challenge at mmWave frequencies. For telecoms, the more bandwidth you have, the more data you can support,” Daneshgaran said. This is because your data rate is directly proportional to the amount of bandwidth you have around your carrier frequency.” Daneshgaran went on to explain that in a radar application, broadband is important because it involves continuous frequency scans. The more bandwidth, the easier it is to discern a target in particular sweep. In the case of Micro Harmonics, the increased bandwidth of their distributors is achieved by abandoning complex dielectric impedance matching elements in favor of a mechanical engineering solution. This makes performance highly repeatable from one assembly to another. With these distributors, Daneshgaran said, We get a pair of clean bandwidth, if not more, within the characteristic limits of 30 dB isolation we seek for our application.” “If we were willing to accept something like 20 dB of port isolation, we could have 4 GHz of bandwidth Bandwidth, which is very important. “Because of the initial delays in finding viable mmWave components, we really needed to jump in and make many of the measurements that we’ve fallen behind,” Daneshgaran concluded. “By using high-end dispensing hardware, our machines have been running continuously since we set them up, and we couldn’t be more pleased with the results.” .


Like it? Share with your friends!

0

What's Your Reaction?

hate hate
0
hate
confused confused
0
confused
fail fail
0
fail
fun fun
0
fun
geeky geeky
0
geeky
love love
0
love
lol lol
0
lol
omg omg
0
omg
win win
0
win
Joseph

0 Comments

Your email address will not be published.