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SABIC’s New Thermoplastic Compound Upsurges Base Station Performance

Published on 2015-08-17. Author : SpecialChem

PITTSFIELD, MA/ USA -- The explosive growth of smart devices, mobile-to-mobile connected modules and the ever-increasing amounts of data and voice traffic generated by their use are key drivers in the need to expand global network and transmission capacity.

Fig. 1: SABIC

SABIC has developed new solutions to help manufacturers of base station antennas – in particular, internal components such as phase shifters – meet this demand with a new portfolio of THERMOCOMP™ compounds that have been engineered to meet specific performance requirements in ways that are superior to two incumbent materials, ceramics and PCBs. This suite of new materials has been optimized for transmission conditions from 900 MHz to 3GHz and beyond, providing different combinations of Dk (dielectric constant) and Df (dielectric dissipation factor) performance.

And, according to Alan Tsai, Director of Consumer Electronics Technology & Innovation, Innovative Plastics, “Because these are thermoplastic materials, they can provide greater design flexibility and higher manufacturing yield than traditional materials such as ceramics or printed circuit boards (PCBs), in addition to meeting specific signal strength or signal range objectives.”

Within each base station are multiple antennas containing phase shifters which, based on traffic, deliver either greater strength, meaning fewer dropped transmissions; greater range, meaning a broader coverage area; or both. Key measures of performance are the dielectric constant (Dk), which quantifies signal range, and the dielectric dissipation factor (Df), which indicates signal loss.

The dielectric performance requirements are slightly different at various frequencies from 900 MHz to 3GHz, and at different temperature ranges. “We found that the industry lacked performance-specific materials,” Tsai noted, “which is why we took on the challenge of providing new options.”

In general, when compared to ceramics and PCBs, SABIC’s materials can provide a better balance of dielectric properties, with extremely low Df, down to 0.001, and a wide range of Dk from 3 to 13.9, depending on frequency requirements. By comparison, general purpose PCBs is capable of Df to 0.005.

In addition, the thermoplastic-based materials have mechanical properties that provide a number of advantages to base station component OEMs, such as dimensional stability and low friction (important because the phase shifters are in constant motion), flame resistance and stable Dk within climate conditions ranging from –40 degree C to +55 degree C with 55% humidity. And, because the materials are thermoplastic, they are capable of complex geometries and miniaturization, unlike ceramics or PCBs. Thermoplastics can also provide higher production yield rates than ceramics, contributing to potentially lower system costs.

SABIC has achieved these results by its superior compounding ability – that is, leveraging a deep understanding of the molecular structure of the base resins and the filler materials to yield the desired performance results. SABIC’s dielectric portfolio consists of compounds using a variety of base resins, including LEXAN™ resin, a polycarbonate material; NORYL™ resin, a polyphenylene oxide resin; or high density polyethylene (HDPE) resin, which expands the ability for component manufacturers or system integrators.


Saudi Basic Industries Corporation (SABIC) ranks among the world's largest diversified chemical companies. The company is among the world's market leaders in the production of polyethylene, polypropylene and other advanced thermoplastics, glycols, methanol and agri-nutrients.

SABIC recorded a net profit of SR 23.3 billion (US$ 6.2 billion) in 2014. Sales revenues for 2014 totaled SR 188.1 billion (US$ 50.2 billion). Total assets stood at SR 340 billion (US$ 90.7 billion) at the end of 2014.

SABIC's businesses are grouped into Chemicals, Polymers, Performance Chemicals, Agri-Nutrients, Metals and Innovative Plastics. SABIC has significant research resources with 19 dedicated Technology & Innovation facilities in Saudi Arabia, the USA, the Netherlands, Spain, Japan, India, China and South Korea. The company operates in more than 45 countries across the world with around 40,000 employees worldwide.

SABIC manufactures on a global scale in Saudi Arabia, the Americas, Europe and Asia Pacific.

Headquartered in Riyadh, SABIC was founded in 1976 when the Saudi Arabian Government decided to use the hydrocarbon gases associated with its oil production as the principal feedstock for production of chemicals, polymers and fertilizers. The Saudi Arabian Government owns 70 percent of SABIC shares with the remaining 30 percent held by private investors in Saudi Arabia and other Gulf Cooperation Council countries.

Source: SABIC

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