Components & Connectors Archives - Page 43 of 80

Transparent antenna fits smartphone screens to reduce disruption

Mon, Jul 05, 2021

At MWC21, OLED display touch sensor manufacturer, Dongwoo Fine-Chem showcased this transparent, on-display screen mmWave antenna for 5G.

The Antenna on Display (AoD) technology is a transparent antenna designed to deliver the best possible 5G coverage for smartphones and communication infrastructure.

Current 5G smartphones have mmWave antennae built into the side or the back of the device, which often causes interruptions to radio wave transmission and disruptions to 5G stability when users hold the smartphone. An antenna that fits on the smartphone screen reduces disruption, says Dongwoo.

“Technologies like augmented reality (AR) and virtual reality (VR) require mmWave 5G technology that delivers high speed and low latency,” explained Rha In-ho, CEO and president of Dongwoo Fine-Chem.

MmWave operates at 30 to 300GHz and one to 10mm in wavelength, making it particularly well suited to high-speed 5G, while securing a wide bandwidth at the same time. However, mmWave cannot pass most solid materials effectively. Dongwoo Fine-Chem’s AoD technology allows device manufacturers to install a transparent antenna on the display, where it is least likely to be obscured by users for stable mmWave 5G communication with minimal transmission interruptions. It can realise dual polarisation on the three frequencies (n257=26.5 to approximately 29.5GHz, n258=24.25 to approximately 27.5GHz, n260=37 to approximately 40GHz) of mmWave 5G that is most commonly used worldwide.

AoD technology can be applied to glass windows on vehicles and buildings, signage, or street lamps for them to function as an antenna. This way, they can be used to expand 5G infrastructure.

Dongwoo Fine-Chem specialises in touch sensors for OLED displays. The subsidiary of Japan’s Sumitomo Chemical was established in Korea in 1991. The company has manufactured high-purity chemicals, high-purity alumina, touch sensors, polarising film, and colour filters for semiconductors and LCD, OLED displays. In collaboration with local universities and companies, Dongwoo Fine-Chem has secured original and exclusive antenna design technologies, with the world’s only design and manufacturing technology in transparent antenna that can be integrated with displays.

http://www.dwchem.co.kr.

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Ampleon bases its integrated Doherty power amplifier on its LDMOS technology

Fri, Jul 02, 2021

Based on Ampleon’s LDMOS transistor technology, the LGA series of RF power amplifiers are targeted at small cell infrastructure and massive multiple input/multiple output (MIMO) implementations. They are supplied in 50Ohm in/out packages and are compact with dimensions of 7.0 x 7.0mm.

The LGA series power amplifiers cover frequencies from 700MHz through to 4.1GHz. Each features a three-stage, fully integrated Doherty design, which helps to reduce the board space needed for the power amplifier circuitry. It also accelerates development time and facilitates volume production, says Ampleon. They support signal bandwidths reaching all the way to 300MHz, with the elevated output powers that they can deliver (up to 16W) enabling greater network coverage. The strong efficiency figures (greater than 40 per cent at 9.0dB on some models) contribute to keeping power consumption levels low, and mean that the power amplifiers generate only minimal heat enabling smaller and less visible base stations.

The compatible pinout definition shared across all of the devices in this series allows engineers to apply the same base layout to cellular network hardware designs covering different frequencies. The relevant device can simply be dropped in as required, explains Ampleon. This means the multi-operator business models that are now emerging may be addressed.

Created in 2015, Ampleon specialises in high-frequency applications based on LDMOS and GaN technologies. Ampleon has more than 1,600 employees worldwide, dedicated to enabling customers to be successful with RF power products through close co-operation and partnership, innovation, and excellent execution. The consistent portfolio offers products and solutions for 4G LTE and 5G NR infrastructure, industrial, scientific, medical, broadcast, aerospace, and defence applications.

http://www.ampleon.com

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Weebit Nano integrates switch selector with ReRAM cell for standalone market

Mon, Jun 28, 2021

Demonstrating what is believed to be the industry’s first commercial integration of an ovonic threshold switching (OTS) selector with an oxide-based ReRAM cell, Weebit Nano says it is a significant step in the implementation of 3D memory stacking and crossbar architectures in future developments.

Weebit Nano and development partner CEA-Leti, announced the commercial integration of an oxide-based ReRAM (OxRAM) cell with an ovonic threshold switching (OTS) selector three months ahead of schedule.

A selector in a memory chip enables optimised cell access within a memory array. It assists in isolating memory cells so only the specific cells that should be accessed are, and all the other cells are not impacted. In the embedded space, a transistor is typically used as the selector device, but a transistor does not support the densities required for discrete chips. OTS is a preferred selector technology for discrete ReRAM chips as it enables the smallest ReRAM bit cell, as small as 4F2, together with endurance, low energy consumption, and high switching speeds.

“New markets like IoT, 5G and AI are driving needs for emerging NVM on advanced process nodes,” said Jim Handy, Memory Analyst, Objective Analysis. “Weebit’s combination of ReRAM with an OTS selector promises to scale to the advanced processes and high memory densities that new memory chips will need.”

According to Gabriel Molas, Senior Scientist at CEA-Leti, “Creation of an OTS selector is quite a complex endeavour given the concurrent requirements to achieve high endurance, reduce variability, and maintain characteristics at high temperature operation.”

Coby Hanoch, CEO of Weebit, said: “We see a broad range of opportunities for discrete ReRAM, from NOR flash to storage class memory, in a range of segments.”

Weebit Nano develops next-generation semiconductor memory technology. The company’s ground-breaking Resistive RAM (ReRAM) addresses the growing need for significantly higher performance and lower power memory solutions in a range of new electronic products such as IoT devices, smartphones, robotics, autonomous vehicles, 5G communications and artificial intelligence (AI). Weebit’s ReRAM allows semiconductor memory elements to be significantly faster, less expensive, more reliable and more energy efficient than those using existing flash memory solutions. It is based on fab-friendly materials which means the technology can be quickly and easily integrated with existing flows and processes, without the need for special equipment or large investments.

http://www.weebit-nano.com

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Würth Elektronik adds PoE++ to MID-POE series of PoE transformers

Thu, Jun 17, 2021

Power over Ethernet (PoE) transformers from Würth Elektronik now include PoE++ models which the company has added to its MID-POE PoE transformer series.

These SMT transformers are suitable for flyback or active clamp forward power supplies that comply with the IEEE 802.3bt standard for four pair PoE, or 4PPoE, which is also known as PoE++. The 10 new transformers can provide an output power of up to 95W.

Demand for more power in PoE devices has risen due to the advancements in smart and IoT applications, says Würth Elektronik. In response, the company expanded its MID-POE series for IEEE 802.3bt Type 3 (60W) and Type 4 (90W) devices. The transformers use the low-profile EFD20 and EFD25 packages and offer high power densities over a wide range of common PoE output voltages.

The PoE++ transformers are suitable for video conferencing systems, automation control systems and smart IP cameras. Customer-specific versions are possible on request.

All MID-POE transformers are available from stock without a minimum order quantity.

Würth Elektronik eiSos Group manufactures electronic and electromechanical components for the electronics industry. Würth Elektronik eiSos is one of the largest European manufacturers of passive components and is active in 50 countries. Production sites in Europe, Asia and North America supply customers worldwide.

The product range includes EMC components, inductors, transformers, RF components, varistors, capacitors, resistors, quartz crystals, oscillators, power modules, wireless power transfer, LEDs, sensors, connectors, power supply elements, switches, push-buttons, connection technology, fuse holders and solutions for wireless data transmission.

The service values of the company are characterised by the availability of all catalogue components from stock without minimum order quantity, free samples and extensive support through technical sales staff and selection tools.

Würth Elektronik is part of the Würth Group, which specialises in assembly and fastening technology.

http://www.we-online.com

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Transparent antenna fits smartphone screens to reduce disruption

Ampleon bases its integrated Doherty power amplifier on its LDMOS technology

Weebit Nano integrates switch selector with ReRAM cell for standalone market

Würth Elektronik adds PoE++ to MID-POE series of PoE transformers

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