[Introduction]: 5G commercial timetable is accelerating, 5G is coming, new technical requirements are put forward for low loss, high integration, high consistency and easy processing of RF microwave PCB materials. The upcoming 5G will give low medium. What are the development opportunities for the loss of microwave materials?
According to the public timetable of major operators around the world, 5G commercial time may be further accelerated. It is understood that at the Korean Winter Olympics in 2018, Korean operators will provide 5G services in advance. Verizon in the United States has also pre-empted the 5G frequency band. In 2020, the Tokyo Olympic Games in Japan will also provide 5G services, so the commercial speed of 5G may be advanced.
As 5G will adopt higher frequencies, it will gradually increase from the past 3Ghz to 6GHz and microwave frequency bands, which will bring new technological trends to antenna RF materials. Jeff Grudzien, vice president of Rogers Advanced Connectivity Solutions, told the international electronics business reporter that the frequency has been rising. The high process puts higher demands on the loss of the sheet. How to achieve lower loss at high frequencies becomes a major challenge for 5G antenna panels. In addition, since the number and complexity of 5G MiMO antennas are much higher than those of 4G active antenna systems, higher requirements are placed on improving antenna integration and reducing assembly difficulty. In addition, due to the need to integrate a certain amount of power in a smaller size, 5G vs. 4G also puts higher requirements on the thermal conductivity of the material.
For 5G, in addition to power boosting and device miniaturization, another challenge is how to perform the cooling function in a smaller space layout. “Our company has more research on plates with higher thermal conductivity values, because the frequency of the selected plates will be thinner. How to make high thermal conductivity values ​​on very thin materials is also a challenge.†Jeff Grudzien also said that for 4.5G, as 4G adds more and more frequency bands to the antenna, the antenna tower has been arranged with a lot of antennas, and the antenna design becomes more and more complicated. Because of the power boost, engineers want to put active circuits into the antenna system to form an active antenna system, which requires more components to be placed in a limited space. In this case, multi-layer PCBs began to replace the past cables to meet the complex antenna design requirements.
According to Jeff Grudzien, Rogers' unique thermoset resin meets the needs of the high frequency, multi-frequency, and complex antenna systems mentioned above. In the field of radio frequency, Rogers has a large market share. In 2014, Rogers acquired Yalong, an excellent manufacturer in the field of antennas, to expand its antenna product line. Nowadays, two series of antenna plates for thermosetting and thermoplastic molding have been formed, which will provide customers with more choices in different application fields.
PTFE materials typically have less dielectric loss than Rogers' hydrocarbon materials. Moreover, PTFE has better anti-aging properties. However, since the material itself is soft and expands with temperature, it has limitations in the design of the multilayer board. However, through continuous research and improvement, Rogers has improved the hardness of the PTFE material and improved the size of the PTFE material by adding suitable filler materials, so that the PTFE material can also be reliably mixed with the PTFE material or the thermosetting material. As an example, the RO3000TM series of circuit board materials are thermoplastic ceramic filled polytetrafluoroethylene (PTFE) composites with dielectric constant (Dk) values ​​ranging from 3.0 to 10.2. As a thermoplastic material, its electrical properties do not change with time, are not susceptible to high temperatures, and are very small with temperature and have a lower dielectric constant temperature coefficient (TCDk). This is a big improvement over earlier polytetrafluoroethylene (PTFE) based thermoplastic circuit board materials. On the other hand, the processing of Rogers hydrocarbon materials is very similar to that of FR4 compared to thermoplastic materials. The metallized vias of RO4835TM laminates can be completed using standard processing techniques with a Z-axis expansion coefficient of 31 ppm / °C ( CTE), which is substantially close to the coefficient of expansion (CTE) of copper of 17 ppm / °C. At the same time, if Lopro copper foil is used, it can also achieve the loss value comparable to PTFE material, which has the advantages of excellent performance and easy processing.
“The technical advantage of Rogers is that it has accumulated a lot of experience in testing and quality control. Our consistency is very high and we have a wide range of product choices. Our quality control system enables us to produce quality and quality in different locations around the world. A very consistent product. So you don't have to worry about using plates, we will provide localization support.†Jeff Grudzien said that Rogers' unique value is not only easy to process multi-layer boards, but also a variety of materials. Lightweight, low insertion loss, and low intermodulation advantages. “Our RO3003TM has been widely used in 77GHz automotive radars (automotive RF sensors). This shows that our products can be used in batches for very high frequency applications.â€
The Internet of Things usually consists of two parts, one is a base station and the other is a terminal device. “Rogers products have been widely used in base station infrastructure. From the perspective of terminal equipment, we have many application examples in the car, such as a variety of car antennas, DSRC (dedicated short-distance workshop communication). Rogers has many years of technology accumulation And application experience, Rogers's sheet can further reduce the cost of MIMO and active antenna systems, making them more widely used in the 5G field to increase the capacity of data communications." Jeff Grudzien said that the current Chinese market in Rogers' global business It has accounted for more than 50%. “Our thermoset resins are sold more than all Teflon sheets (PTFE) in the world. We have enough coating lines and press lines to meet the global market demand,†said Jeff Grudzien. In the past five years, the Chinese market has undergone tremendous changes. In the past, the patterns of European and American design and Chinese production have gradually changed to more domestic designs. In order to cope with the new customer demand in the Asian market, Rogers has two factories in Suzhou, and uses data analysis to control the entire operation of the production, improve the production efficiency of the sheet, meet the customer's supply needs, and will also implement TS in the near future. -16949 management system to better meet the requirements of the automotive industry. Due to sufficient capacity, our various product lines have a short lead time.
“The main product of our business unit is sheet metal, or copper-clad substrate (PCB material). We provide engineers with interconnect solutions in the electronics field.†Jeff Grudzien said that Rogers has a history of more than 180 years, starting in 1960. Enter the aerospace field to make plates. The entire Rogers division has three divisions as global leaders in engineering materials for clean energy, the Internet, advanced transportation and other technological areas where demanding stability is required. Includes power electronics solutions for high efficiency motor drives, automotive electrification and renewable energy; elastomeric materials with sealing, vibration management and impact protection in mobile equipment, locomotive interiors, industrial equipment and functional apparel Solutions, as well as advanced interconnect solutions for wireless infrastructure, automotive security and radar systems.
“Our ACS department used to be called the Microwave Division, and then changed to the Advanced Circuit Board Materials Division. Now it is called the Advanced Interconnect Solutions Division. Originally we only provided materials, and now we further provide customers with the interconnection to meet their needs. The solution. As a leading material solutions provider, Rogers is constantly striving to innovate and provide competitive high performance material solutions for a wide range of industries. The Advanced Interconnect Solutions Group is helping customers achieve lower loss, easier processing, higher consistency and higher integration interconnect solutions to help 5G commercial takeoff.
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