Antenna for 5 directions. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Antenna for 5 directions. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / HF antennas

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Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

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$7 Hyundai A80 Tablet: 1,5GHz, Android 4.0 02.02.2012

A new tablet computer - A7 - has appeared in the assortment of Hyundai IT company. The novelty, the sale of which is about to begin (however, so far only in China), can compete for the title of the most affordable tablet running Android 4.0 Ice Cream Sandwich: the estimated cost of the product is about $80. At the same time, the equipment of the Hyundai A7 cannot be called poor at all.

The novelty is built on the Allwinner A10 single-chip system, which is quite common in China, which includes a 1,5 GHz processor and a Mali 400 GPU. The amount of RAM is 512 MB, the integrated flash memory is 16 times larger - 8 GB. The product configuration includes a Wi-Fi 802.11b/g/n wireless module, a microSD card slot, a 0,3 MP front camera, a standard headphone jack and an accelerometer.

Interface connectors include USB and Mini HDMI ports. The creators of the tablet claim that the product is capable of handling 2160p videos. True, how comfortable it is to watch such a video on a seven-inch touch screen with a resolution of 800 x 480 pixels is a question.

Tablet dimensions - 193 x 118 x 13 mm. Battery capacity - 3000 mAh.

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