microwave PCB Microwave PCB,Microwave Frequency PCB,Bare Copper Microwave PCB,High Frequency PCB Storm Circuit Technology Ltd , https://www.stormpcb.com
microwave PCB`s is a type of PCB designed to operate on signals in the megahertz to gigahertz frequency ranges (medium frequency to extremely high frequency). These frequency ranges are used for communication signals in everything from cellphones to military radars. The materials used to construct these PCB`s are advanced composites with very specific characteristics for dielectric constant (Er), loss tangent, and CTE (co-efficient of thermal expansion).
High frequency circuit materials with a low stable Er and loss tangent allow for high speed signals to travel through the PCB with less impedance than standard FR-4 PCB materials. These materials can be mixed in the same Stack-Up for optimal performance and economics.
The advantages of using materials with a low X, Y and Z CTE is a resulting PCB structure that will remain extremely stable in high temperature environments while operating at up to 40 GHz in analog applications. This allows for the effective placement of very fine pitch components including, in some cases, bare die-attach. Additionally, the low CTE materials will facilitate the alignment of multiple layers and the features they represent in a complex PCB Layout.
Features
.CTEr = +40/+50 ppm per °C (low); Tg (glass transition temperature) is 280°C
.ER = 3.38/3.48 at 10.0 GHz
.ER is constant to 40.0 GHz
.ED (electro-deposited) copper only
.Layer-to-layer thickness control = +/- 0.001
.Fabrication costs are typical to slightly increased
Changhong Launches the First Large-scale Market for Laser Theater Color TV Manufacturers
With the increase in demand for large-sized TVs by users, more and more color TV manufacturers are also expanding the layout of the oversized TV market. On December 21, Changhong officially launched its first laser cinema product and announced its entry into the television super-sized market.
It is understood that Changhong CHiQ laser theater by the laser host, the optical screen consists of two parts, including the configuration of 120-inch wide-angle eye screen P5 type price is 29,999 yuan. Talking about the release of the laser cinema, Guo Dexuan, deputy general manager of Sichuan Changhong Electric Appliance Co., Ltd. and chairman of the Multimedia Industry Group, said that he mainly focused on large-size areas for market demand. Basically, LCD TVs have reached a limit of 75 inches, and many users of home elevators are basically difficult to support the transport of larger-sized LCD TVs. Changhong, a laser theater product, has accumulated technology through 10 years and its products have matured. The market has also matured, so at this time laser cinema products were introduced.
In fact, large size has long been the main trend in the development of the color TV industry. According to data from Ove Cloud Network, the market share of 55-inch TVs in the first half of 2016 was 21.8%, up 10.1% from the previous year, becoming the largest increase in the color TV market in the first half of 2016, and also becoming the demarcation line of TV screens. The market share of 55+ TVs was 28.8%, an increase of 11.8% over the previous year. Not just Changhong. Earlier this year, Hisense also launched a laser television of its kind. The product size includes 88 inches and 100 inches. “With the promotion and popularization of ultra-large-screen, near-theater cinematic real-world laser cinema products, the entertainment needs of users in paid movies and large-scale games will be further released,†industry analysts pointed out. The hardware-based and paid content supplements will continue to be the major profit model for TV manufacturers in the next 5-10 years. Changhong's introduction of laser theaters and force users can be described as “soft and hard,†while gaining access to the high-end market of large screens. User portal resources.
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