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Superconducting Filters In Base Stations And Other Network Optimization Td’s Role

0 Introduction Superconducting technology is considered of strategic importance in the 21st century high-tech one, in energy, information, transportation, instrumentation, defense and other aspects important applications. Currently active in the world are in the application technology of superconductivity.

Superconducting filter using conductor at very low temperatures (-200 or so) when the conductor made of resistance similar to the principle of zero band-pass filter, used in mobile Communicate Base station receiver front end, significant improvements Mobile base stations Uplink performance, improve base station receiver sensitivity and lower band, the band all kinds of interference, thereby improving the signal transmission quality, extend coverage up to enhance signal transmission rate.

Of superconducting filter in TD-SCDMA base stations and other network optimization in the role of China is actively developing TD-SCDMA system and the 2G network optimization system is important.

1 mobile communications uplink and downlink analysis

1.1 Mobile communication is mainly limited by the uplink

Mobile phone base station transmit power is much greater than transmission power, and mobile phone base station receiver sensitivity and receiver sensitivity is almost the same. Therefore, mobile communication is mainly limited by the uplink, uplink coverage area are often less than the downlink coverage area.

In addition, as users continue to increase, mobile communication network is bound to increase the number of base stations. This allows access to the base station receiver interference and noise growing and increased the burden on the uplink.

1.2 to improve the general approach to the uplink

General approach to improve the uplink are: installation of the base station transmitter output cavity RF filter to suppress the base station transmitter spurious radiation. Base station receiver uses diversity reception mode, and also used in the RF input of the cavity filter to improve the receiver sensitivity and inhibit a variety of band interference.

However, the filter cavity Q value can only be reached around 5000, relatively large passband loss, stop-band attenuation is not enough, the transition zone are not steep. Therefore, this method can not effectively solve the problem uplink interference, the base station receiver in-band interference and background noise is still relatively high, the base station receiver sensitivity and capacity utilization is not high.

2 superconducting filter is the best way to solve one of the base station interference

Superconducting filter is to use conductor at very low temperatures (about -200 ) resistance is approximately zero when the surface characteristics of the filter is made, the Q value of up to 10 million, higher than the filter’s Q value cavity nearly 20 times. Therefore, the superconducting filter passband with minimal insertion loss ( 60dB) and very steep transition zone (-100dB/400KHz). After the superconducting filter

with the same working conditions in the ultra low-noise low-temperature release (LNA) (Gain: 12dB), with very low noise figure (

I am an expert from China Products, usually analyzes all kind of industries situation, such as wood clothes rack , over the door racks.

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What Folks Would Want To Learn About Pool Filters

by alber

What Folks Would Want To Learn About Pool Filters

Everyone loves to bask in a completely clean and fresh swimming pool. Apart from it can help calm the senses, it likewise allows the family members plenty of time to be together and revel in the peaceful warmth of the sun. A great deal of contemporary residences, hotels and resorts at present feature swimming pools as their core attraction and also this simple fact doesn’t just pull the interest of visitors but also help increase the entire appearance of the place. One of the main specifications to maintain your pool fresh and clear-looking is utilization of pool filters. Your swimming pool regardless of how clear it might look will constantly be a home to many harmful bacteria and harmful germs and to be able to protect yourself and your loved ones, the proper usage of pool filters and pumps are essential. To aid you to find out more of pool filters, allow me to share the common queries of most people who are very eager to find out about various pool cleaners and equipment.

1. Should I seriously need a pool filter? Of course. If you want to stay safeguarded and healthy the whole time you’re out swimming and unwinding in your pool. Pool filters maintain your pools clean and clear by removing the little bits and pieces that are invisible to the eye. It eliminates the tiny invisible floaters thatchemicals can’t get rid of. Pool filters are incredibly safe and sound to utilize and uncomplicated to put up. As soon as you finished the entire set-up, there’s no longer a need for youto perform the frequent manual clean-up and clearing.

2. I would like to figure out what pool filter is right for me to utilize. Your plans of using a pool filter call for you to take a look first your pool necessities. There are basically 3 variations of filters out there in the market nowadays: the sand, D.E (Diatomaceous Earth) and cartridge filters. The sand filters deliver the results by trapping those particles within the 20-100 micron range. Sand filter’s bed requires a replacement once every seven years. D.E filters can capture dirt and small floaters that measures 25-100 micron range. As soon as the stored dirt is heavy enough to reach 8-10 lbs., then it’s the perfect time to cleanse it with warm water. Cartridge, another variety of pool filter generally will last up to 2-5 years with proper care and inspection. If it’s doing work too much or overused, then assume it to merely endure for only 1-2

3. Exactly how do i need to clean a pool filter? You are able to try cleaning your pool with the use of pool filters. This alternative is effective and affordable. Otherswould want to use pumps to ensure the overall cleanliness and avert the spread of contaminable disease. This alternative is rather costly and demands time. You have to check your pool filters from time to time to see if it still doing the jobperfectly or in need of replacement. Washing filters may need you time and might require you to bear in mind some few procedures. Drying and soaking are just only a few of the steps you have to undertake so as to acquire the most effective results.

If you are looking for information about pool cleaners, heat pump, pool filters and other pool supplies, visit our website AstralPool.

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