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Huawei CableFree 5G Antennas

30.05.2020

Huawei announced a breakthrough in the development of 5G antennas. A new design called CableFree improves the capabilities of 5G base station antennas. This communication standard provides for the use of new bands and more antenna connections. And the new design provides better coverage in the 5G high-frequency band. According to the company, CableFree improves the radiation efficiency of the antenna by about 20%.

To support the higher capacity and additional antenna connections used for 5G communications, the antennas must be capable of handling 1kW. For communication of the previous generation, a power of 500-600 watts was enough. The CableFree design increases the power of the antenna by more than 80% and also reduces the weight of the antennas, making them easier to install. The six-band antenna based on CableFree is about 10 kg lighter than analogues, and the weight of multi-channel antennas is immediately reduced by 50 kg. Thus, they do not require a crane to be installed, which saves time and money during the network deployment process.

At the same time, CableFree reduces the use of screws and solder points by up to 80%, reducing the chance of passive intermodulation or signal distortion and interference caused by large metal objects. This, in turn, makes it easier to automate the production of antennas while keeping their quality unchanged.

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Bionic organ of vision 07.04.2013

UCLA professor of bioengineering, Wentai Liu, who has been doing research in this area for two decades, has created a device that the inventor himself calls "the first bionic eye for the blind."

The official name of the product, which is a retinal prosthesis, is Argus II Retinal Prosthesis System. The group of specialists involved in the project, led by the professor, hopes that their work will help elderly people who have lost their sight due to age-related changes or diseases that cause the destruction of light-sensitive receptors in the retina.

The central component of the prosthesis is a miniature but powerful enough chip implanted in the retina and replacing the signals of damaged photoreceptors with its own. Argus II receives video signals from a miniature camera built into the goggles. To be more precise, first, the camera data is sent to a microcomputer attached to the patient's wrist, and after the necessary processing, they are transmitted wirelessly to a chip implanted in the eye. The task of the chip is to stimulate the nerve endings with electrical impulses that travel through the optic nerve to the visual area of the cerebral cortex.

As stated, patients with the Argus II prosthesis gain the ability to read texts in large print, distinguish objects and their movement, even see the contours and some details of faces. So far, the picture is far from perfect, since the artificial retina has a resolution of only 60 points, negligible compared to the resolution of a healthy eye, but for people who are blind, this is an incredible breakthrough. The first patient to take part in clinical trials was a seventy-year-old man who, at the age of twenty, completely lost his sight due to an illness.

The UCLA research team is currently testing two more prototypes, which have a resolution of 256 and 1026 pixels, hoping to fit them into the same dimensions as the first version of the prosthesis. Over time, scientists expect to add the ability to color vision and move the camera directly into the eye.

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