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Say for instance that you have just purchased a brand new wireless broadband modem and it comes with two ports that you need to plug into your antenna. The usual dilemma of many people in this kind of scenario is they will wonder which one they should use, and why on earth they’d need two.
Let us put aside technicality for now, below are some of the fundamental information one may need to know about MIMO technology.
Background Info In MIMO Antennas
From the early days of radio technology, we got used to UHF radio technology transmitting on a single antenna. Or simply a mobile phone. This kind of transmission takes place through the use of air space. It will be received on a phone tower by a considerably larger antenna. The phone tower itself will take the challenge of rebroadcasting the signal to your target destination.
This is the working technology behind every single phone call we make on our cellphones.
But, due to the surging demand for a more reliable 4G wireless internet and a faster one at that, we are now in need of an even more intricate transmission method.
You may not be aware of this but you could have been enjoying 3G Internet for years now, with that it should not skip your attention that top speeds offered by network providers are increasing fast. From 3.6 Mbps for the initial series of broadband sticks down to 7.2 Mbps in 2007 and then in 2008, it spiked to 21 Mbps and then 42 Mbps shortly after. In the later part of 2011, this came up again to 100 Mbps alongside with the introduction to the public of 4G.
Right this very moment we can tell that 5G is looming on the horizon, it’s advent is inevitable and with that, it will be here sooner than we anticipate it will. Some industry insiders are in the belief that this upcoming generation will further spike speeds to around 50 times or even more from 4G.
In theory, it is a very tricky business when it involves increasing the speed. What can be considered as the major limiting factor for speed is no less than the bandwidth.
Every single phone tower comes with frequency widths from which it can transmit. Every single individual that tries to connect to it will be allocated a small channel with a certain width.
What does this signify then? This only goes to show that every single tower comes with a limited number of customers that it can accommodate prior to becoming highly congested. This brings us to this conclusion though: the easiest, most convenient way, so far, to increase speed can be made possible only when you give customers a wider spectrum of frequencies they can transmit on. This signifies that there are going to be fewer people per phone tower. How does this translate to users? This only goes to show that we will need more phone towers to accommodate the increasing need for service. It is quite an expensive undertaking, to be honest.
Instead of going that way, one surefire way to enhance speed is by exploiting other relevant factors and not just focusing solely on the bandwidth.
HSPA and other similar 3G technologies are utilizing digital modulation techniques such as the Quadrature Phase Shift Keying, and a handful of other tricks, to further enhance the symbol rate, considered by industry insiders as the second leading speed limiting factor.
Another limiting factor to speed is the signal-to-noise ratio (SNR) that is reputed for its ability to increase the loudness of power of transmission, causing the phone tower to hear us clearly. Although this may lead to quickly diminishing returns.
After squeezing in all the good performance attributes we can derive from an antenna-to-antenna transmission, we are compelled to tackle the problem differently.
At this point, the use of mimo antennas comes into play, that is we should fail in effecting improved changes to air transmission — our last resort is to use more antennas.
The vast majority of expert minds in the fabrication industry agree in saying that the waterjet cutting space is among the most widely sought after material cutting techniques nowadays. The demand for the use of this technology is further intensified by the fact that it comes with a variety of benefits.
Today, more than ever, there is an increasing number of people who are showing a keen interest in learning so much more about the manifold benefits that the use of water jet cutting machine could bring. Waterjet cutting can be applied in fabrication jobs that involve the use of plastics, metals, foams, and everything in between.
Unfortunately, this state-of-the-art material cutting method is hounded, up to this day, by various wrong belief systems and impressions. These myths are working to the disadvantage of business entities that are in dire need of efficient cutting method. The only way to get around them, though, is to debunk them with what is true and factual.
Waterjet systems are best used for “rough cutting” only.
Many people are under the impression that waterjet cutting is only good for the initial phase of cutting material, and that they can’t be very much reliable and counted on when it comes to having accurate finished parts.
This is completely untrue. With all the technological advances that this material cutting method has gone through, confining waterjet machines to rough cutting jobs is nothing but an utter undermining of what is very much capable of.
Proper setup for these machines would make them very much capable of handling tight tolerances, from 0.005” up to 1” thick. It can even handle 0.001 tolerance with some materials.
Water jet cutting machine is way more expensive compared to the laser cutting method.
Materials that are thicker than ¼”, the use of waterjet technology is putting your team on the more practical side. This means that this method is cheaper to use compared to laser cutting.
With the use of waterjet machines, you are eliminating the need for secondary processing, and this works to your benefit because it will save your business and your team significant amounts of time and money. In addition to that, this method of cutting will also save you raw materials due to nesting capabilities.
It is not advisable to use waterjet on cutting materials that tend to absorb water.
Many people are quick to quip that there is no way you can cut a material with water, but we say that you can. The vast majority of materials that we deem can’t be cut with waterjet machine for fear of getting them wet are okay to cut with a waterjet. This is because you can only expect the very little amount of water could be transferred to the actual material.
When you cut your parts, they’d be completely dry in just a few minutes, as if no amount of water even touched them in the first place. And because of that, there is no damage incurred to the material itself.
Waterjets are best used for tile and metal cutting only.
This is quite a popular myth since many people around us seem to relate to it quite easily. And for that matter, we have to debunk it very often more than any other. So many people today are under the notion that waterjet cutting is confined only to just a few limited materials, whereas the truth of the matter is it can manage to cut through a sundry of different objects.
The waterjet machines flooding the market today can efficiently manage to cut through laminations, plastics, rubber materials, fiberglass, composites, ceramics, foam, and many other materials that we find too challenging to cut.
This explains the reason why this material cutting technology is one of the most sought after methods of today, it is capable of cutting through virtually any material.
A decision to plasmacam without trying to learn a great about it first may eventually lead to disappointment due to the wrong set of expectations about it. Therefore, it makes sense to do your homework first and learn some of the most important things about it before giving yourself a go signal to make a purchase. Only then can you say to yourself that you are not wasting money, time and effort.
When you purchase a plasmacam system, this package should be inclusive of all the necessary software, accessories, construction and installation.
What is a plasmacam machine? This is a complete machining system and can be used right away for cutting out your required parts. Basically, the only things that it will require you to have are a computer system and a hand plasma torch. There is no need for extra parts that you need to assemble or buy. Additionally, you are not obligated to make a purchase of additional software or to learn something else apart from its bundled software application.
The Use of a Handheld Plasma Torch
The machine takes charge of controlling the movement and maneuverings of the handheld plasma torch to provide its optimum flexibility and performance. The plasma machine torch may well qualify as a more expensive option and may not be in the best position to offer any kind of performance advantage against a handheld torch.
Meanwhile, we also have a handful of small plasma cutters that do not offer users a machine torch option. However, the plasma cam machine may well provide the difference we are looking for here. It will allow you to enjoy a significant amount of savings and enjoy using for your various hand cutting requirements also.
Right this very moment, we can safely assert that this machine is among the easiest, most convenient CNC systems to have. When it comes to setup time, training, maintenance, and operating costs — they are all very minimal. It is a bonus that you don’t need to learn or know something about programming, which can be very discouraging to most people in this business.
Type of Motors
Plasmacam machines are utilizing precision servo motors that are usually further enhanced by equipping them with optical encoder feedback. It is not only working to its advantage to promote its level of accuracy but also optimizes its speed capabilities too.
All this will translate eventually to achieving higher productivity. In the absence of the machine speed and acceleration, achieving a very fine cut for your subject material may not even be possible.
Control System Feedback
Most control systems we have today are making use of the open-loop feedback. What does this signify to us? This means to say that your vibrations and load fluctuations may induce your motor to skip or jump steps due to the lost position of the controller.
But what does a servo controller have? It utilizes closed-loop feedback instead. The encoders here make efficient reporting of the machine’s true and accurate position, and back to the controller. With respect to this, the machine’s perfect position is maintained, in spite of the frequently changing conditions.