德赢ac米兰官方合作伙伴s
Currently operational 5G telecommunications has the 3 features of high speed/ large volume, high reliability/ low latency and multiple simultaneous connections. To realize these features, as the communications frequency, the higher frequency, broad submillimeter waveband was introduced in addition to the Sub-6 waveband. In the coming Beyond 5G/ 6G telecommunications, 德赢ac米兰官方合作伙伴 expected that an ever higher frequency broad waveband will be adopted.
德赢ac米兰官方合作伙伴 control and angle of incidence adjustment
With telecommunications using high frequency radio waves, although it is possible to achieve high speed communications, the power consumption of each base station increases. In order to limit this power consumption, the radome must allow the effective passage of radio waves. However, the materials typically used for radomes are solid (non-foamed) plastics such as polycarbonate (PC), ABS and glass reinforced PP, and these materials have relatively high dielectric constants and dissipation factors. Given this, when using high frequency radio waves, wave attenuation occurs when passing through the radome as shown in Fig. 1, making it difficult to realize high 德赢ac米兰官方合作伙伴.
of 德赢ac米兰官方合作伙伴s passing through the radome
德赢ac米兰官方合作伙伴 is also impacted by the thickness of the radome. This is because the reflective part of the radio wave interferes when the radio wave enters and exits the radome. Therefore, it is necessary to design the thickness to match the radio wave frequency. However, radio waves do not always enter the radome at a perpendicular angle. When the radio wave enters at an incline angle, the travel distance will differ from the intended design (Fig. 2), making it difficult to achieve the designed permeability. Also, there is concern the use of broader wavebands will result in 德赢ac米兰官方合作伙伴 fluctuating depending on the frequency. Because it is necessary to address complex issues such as these, radome design is expected to become extremely complicated.
Limitations in relation to base station installation
High frequency 德赢ac米兰官方合作伙伴s attenuate easily when passing through the radome and transmitted through air. For example, 28GHz 德赢ac米兰官方合作伙伴s have a range of about 100m, so in order to increase the network coverage area, it is necessary to install base stations at this interval. However, the base station equipment is heavy, and it is difficult to secure suitable locations. In addition, with 5G telecommunications, because the power consumption of the antenna circuit board increases, large heat sinks are incorporated to remove the resulting heat. This is one factor leading to increased equipment weight and the needs for lighter weight.
Given these issues, 5G base stations are required to more effectively transmit radio waves, and the radome housing should use a material with lower dielectric constant and excellent 德赢ac米兰官方合作伙伴. Also, in order to enable many base station installations in a wider range of locations at shorter intervals, the radome material should be lightweight. In addition, the radome must be able to withstand the effects of the external environment, including impact resistance, water resistance, weather resistance and fire resistance.
In recent years, an increasing number of sensing devices use high frequencies to increase detection accuracy, including automobile millimeter wave radar and peripheral monitoring millimeter wave sensors. In these applications, too, the radome material is required to have good 德赢ac米兰官方合作伙伴, lightweight and resistance against the effects of the external environment.
Advantages of the 德赢ac米兰官方合作伙伴 high performance foam plastic sheets
① Lower 德赢ac米兰官方合作伙伴 (Dk), lower dissipation factor (Df) and reduced weight through foam plastic
To improve 德赢ac米兰官方合作伙伴, as shown earlier in Fig. 1, it is necessary to limit attenuation caused by reflection occurring at the material surface and dielectric loss when passing through the material. An effective solution is the use of a low dielectric material with low dielectric constant (Dk) and dissipation factor (Df) for the radome. The lowest dielectric is a vacuum, and air has similar dielectric properties. Therefore, making the material more akin to air will improve 德赢ac米兰官方合作伙伴 (Fig. 3).
SCB™ is made by foaming plastic that is already a relatively low dielectric material. It is a high performance foam plastic sheet that achieves reduced dielectric constant (Dk) and dissipation factor (Df) by dispersing air bubbles within the plastic material. Given these characteristics, it should be possible to further increase 德赢ac米兰官方合作伙伴. Also, because foaming reduces the density of the material, it will be possible to realize lighter weight.
Air bubbles are dispersed with德赢ac米兰官方合作伙伴 base material, resulting in lower dielectric constant (Dk) and dissipation factor (Df)
In this way, SCB™ high performance foam plastic incorporates our accumulated composition development capabilities and foam technology, and by controlling the dielectric properties (dielectric constant Dk and dissipation factor Df) and foam composition, SCB™ realizes both excellent 德赢ac米兰官方合作伙伴 and lightweight.
② Advantages of 德赢ac米兰官方合作伙伴 in radome design
Traditionally, solid (non-foamed) plastics have been used for radomes. With these materials, 德赢ac米兰官方合作伙伴 fluctuates greatly depending on the frequency and angle of incidence. Therefore, guaranteeing good 德赢ac米兰官方合作伙伴 over the entire frequency band required complex designs and countermeasures. Following the introduction of 5G, as the frequency increases and wave band becomes broader, these problems will become more pronounced.
An effective solution to these problems is to reduce variability in 德赢ac米兰官方合作伙伴 when each factor changes. This can be realized by decreasing the dielectric constant (Dk) of the radome material and limiting radio wave reflection. With traditional radome materials, it was difficult to control the dielectric constant (Dk), but through the use of foaming technology, it is now possible to realize an overwhelmingly low dielectric constant (Dk) that is unachievable with solid plastics. In addition, by decreasing the dissipation factor (Df), dielectric loss when the radio waves pass through the radome material is reduced, making it possible to realize even better 德赢ac米兰官方合作伙伴.
Shown in Fig. 4 is a graph of 德赢ac米兰官方合作伙伴 in the near millimeter waveband (22-33GHz) as measured by Furukawa Electric. Polycarbonate (PC) was selected as the representative traditional radome material, and 德赢ac米兰官方合作伙伴 was measured for thicknesses of 1-3mm. As can be seen in the graph (Fig. 4), 德赢ac米兰官方合作伙伴 changes significantly depending on the thickness and frequency. On the other hand, the graph also shows 德赢ac米兰官方合作伙伴 for SCB™ (PET) 1mm thickness (blue line) and SCB™ (PP) 5mm thickness (green line). Although permeability is somewhat frequency dependent based on the material thickness, radio waves pass through the material with almost no attenuation.
Similar to Fig. 4, shown in Fig. 5 is a comparison of 德赢ac米兰官方合作伙伴 in the millimeter waveband (75-100GHz). With traditional polycarbonate (PC), 德赢ac米兰官方合作伙伴 is strongly dependent on the frequency, and it is difficult to obtain high 德赢ac米兰官方合作伙伴 across the entire broad waveband. However, with SCB™, radio waves permeate with almost no attenuation across the entire waveband, regardless of the material thickness.
As indicated above, our original lightweight, low dielectric foam material SCB™ can be used to obtain excellent 德赢ac米兰官方合作伙伴 without designing the thickness to match the frequency. This will greatly simplify structural design of the radome.
③ Advantages of SCB™ when 德赢ac米兰官方合作伙伴 angle of incidence changes
Fig. 6 shows measured 德赢ac米兰官方合作伙伴 when radio waves are transmitted toward SCB™ at an angle. Similar to an angle of incidence of 0°, radio waves permeate with almost no attenuation even at an angles of 30° and 45°.
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(Note)
Figures are from tests conducted by 德赢ac米兰官方合作伙伴
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(Note)
Measured using the free space method
Based on these results, with reference to the positional relationship of the antenna and radome, complex structure designs such as reducing material thickness in certain areas is not necessary. Therefore, using 德赢ac米兰官方合作伙伴 should greatly simplify radome structural design. (Fig. 7)
④ The excellent environmental durability and design flexibility of 德赢ac米兰官方合作伙伴
德赢ac米兰官方合作伙伴 is a foam material made using our original technology to foam engineering plastic and super engineering plastic, which are difficult to foam using typical foaming processes. Therefore, it is possible to give the foam material the high performance characteristics inherent to the plastic used. As a result, 德赢ac米兰官方合作伙伴 can satisfy the characteristics required for radomes that are normally difficult for foam materials to satisfy, such as impact resistance, weather resistance, water resistance and fire resistance.
In addition, we have various lineups of 德赢ac米兰官方合作伙伴 based on the required characteristics, and it is also possible to assemble different 德赢ac米兰官方合作伙伴 materials into a layered structure to realize a material unobtainable in the past that has functions in each layer. Because we also possess the technology for form layered materials such as this, we can provide 德赢ac米兰官方合作伙伴 that has been formed in accordance with the various forms required for the radome.
“Smart Cellular Board” and “SCB” are registered Japanese trademarks of 德赢ac米兰官方合作伙伴., Ltd.
Our SCB™ can solve the issues often faced when designing base stations that use high frequency 德赢ac米兰官方合作伙伴s in 5G/ Beyond 5G/ 6G telecommunications.