It can be said that no one dares to say that RF or RF can be done well in this way or another. It is very simple. If your university teacher or professional tutor like your tutor does not make you feel that you have gained something from RF technology. So it's hard to say that others can let you know how to learn RF technology.
My own major is not to learn microwave technology. I have been working on RF circuit design for less than seven years. It can be said that there is no direction in how to learn RF technology. How to learn RF technology, both before and now are my very heads. How do you learn RF well? I think we must start with the specific content of RF work.
Specific work content of RF engineers
In the field of human resources, engineers in the field of microwave and radio frequency technology are divided into several names. Generally, the work of the RF engineers that they need can be seen from the name. For example, if a position is a “microwave engineer†or “RF engineer†and the company is a communication device, its work should be small signal low noise amplifiers, frequency synthesizers, mixers, and power amplifiers. Design of circuits and circuit systems; if a position is “RF Engineer†and the company is doing RFID, then design the microstrip antenna and power amplifier, low noise amplifier, and frequency synthesizer (900MHz or more) The high frequency band) is only the design work of the electric field antenna and power amplifier (the frequency band below 30MHz); other mobile phone companies are all special "mobile phone RF engineers".
So what are the specific work of these RF engineers? Nothing more than the following:
1. Circuit system analysis, in some communication equipment company projects, RF engineers need to be responsible for system analysis of the entire RF system circuit, guiding system design indicators, allocation unit module indicators, standardizing EMC design principles, proposing accessories and performance requirements and many more.
2. Circuit principle design, including block diagram design and circuit design, is the basic skills that RF engineers must have. This is also extended from the system design. How to achieve the goal of system design is the purpose of circuit principle design. It is also the "cause" of device selection evaluation, because the process of designing the circuit is also a process of device selection.
3. Device selection and evaluation, to achieve the circuit's index requirements, it is essential to choose the right device, this process is actually carried out simultaneously with the circuit principle design. How to choose the corresponding device, which one of the same type of device is more suitable for our product design? Cost, performance, process requirements, packaging, supplier quality, delivery time, etc., are even more factors to consider.
4. Software simulation, whether it is ADS, MWO, Ansoft or CST, HFSS, anyway, you have to use one or two simulation software. Simulation software can't make your design 100% accurate, but it doesn't always make your design deviate from the basic direction, at least they are accurate in qualitative simulation. So be sure to learn to use one or two or more simulation software. Its basic function is to let you analyze your design qualitatively. There are always errors, but it can enhance your confidence.
5. PCB LAYOUT, the principle is like the theoretical basis, 10,000 applications can be based on only one theory, and several products may have only one schematic, as long as its wiring is different, like a mobile phone, the same mobile phone solution is used by many companies. The design and schematic are the same, but the PCBs from different companies are different. One is different in appearance and the other is different in performance. The difference in performance is actually the difference in PCB LAYOUT. PCBs that meet the requirements, layout and wiring balance performance, appearance, process, EMC and so on. Therefore, PCB LAYOUT is also a very important skill.
6. Debug analysis, this debugging and production debugging are not the same. Production debugging is instructional, and the focus of debugging the R&D products is to find problems and solve problems. Debugging is a process of summarizing and accumulating experience. It is not to accumulate debugging experience through debugging, but to accumulate design experience through debugging; many problems may not be discovered at the time of design, then after debugging, we will know later in design time. How to avoid these problems and how to improve them. Debugging is also the most effective way to practice theory. We can qualitatively understand theoretical knowledge through the debugging process.
7. Testing, in fact, testing is for debugging services, debugging is for design services (design is for the market). RF engineers must be proficient in using a variety of RF test instruments, be they spectrum analyzers, network analyzers, signal sources, oscilloscopes, power meters, noise figure testers, comprehensive testers, and more. It is difficult to debug effectively without testing, and can't you find out how to improve the problem? So don't underestimate the test technology. In fact, look at foreign RF companies. The real masters are all from design to test technology. The reason is worth considering.
8. If you can, please do more with your own hands, do more grassroots work, you can solder yourself and solder it yourself. When you can't debug, you can find someone to change the capacitor and change the inductance on your side. Therefore, don't look down on the solder and have the ability to solder yourself.
How to learn RF in actual work
After knowing your job responsibilities, how should we learn more about it in work and practice? There are many cases in the real work, not how many integral calculus equations we pass can be easily solved. This is not to say that the microwave equation is meaningless in actual work, but rather that many people repeat that point, "the theory must be tested by practice."
The first day of social work is not the first day you are done, but the first day you really study textbooks. It is the first day you test your classroom knowledge. Many of my friends hope that they will enter a good company immediately after graduation, work in a good department, want to engage in the first research institute of technology, choose a good company, and want to enter the company's central research department. At least I have to work in a development department; it doesn't matter if I enter the research and development department. Many of my friends even want to do "research" work. Stay in front of the computer all day long, go online, find information, or paint. The two schematics let the LAYOUT engineer go to the drawing board and write two articles in a free time. In fact, this beginning has entered a misunderstanding. This is why there are many technicians with many years of work experience who come out of a company and find that they know very little, or that it seems to be completely technically mixed. Why, they forgot, the root of technology lies in practice. Therefore, do technical work, do not underestimate the technical staff staying in the laboratory all day long, do not think that you stay in front of the computer is higher than the colleagues in front of the instrument. In fact, fundamentally speaking, they are real technicians who can experience theoretical knowledge in practice.
How to learn RF technology in practical work? It should be noted that the pedals are practical, modest, and the posture is lower, and more hands-on; avoid the computer family, and avoid the skill floating. This is the attitude.
For engineers who have just entered the RF field, they should first be a laboratory technician. This is modest and low-profile. Whether it is a product designed by someone else or a product designed by themselves, every resistor and capacitor inductor must know its function. The meaning of each trace must be clear. You must know why you should use it to do so. Don’t worry about things, don’t talk about experience, and be practical. It’s not that experience is wrong. If you really want to make progress, you must understand that if you use experience to explain everything, you will not make progress at all. Do more hands-on, you can do it yourself, don't you talk about practice?
If you have the above attitude, you will get twice the result with half the effort. The attitude is good, the next step to pay attention to is the method problem.
Many people work very well. They are all in the laboratory all day, reading books all day long, but they have not seen any big progress. Why is this kind of friend such a situation? Method, method problem. What are the methods of learning RF?
1. Do not ask for a solution. When I heard this, many of my friends were not happy. To learn a thing is to understand it. Why do you want me to ask for a solution? Of course, if you are truly gifted and talented, the radio frequency thing is to understand the microwave equation to the electromagnetic field electromagnetic wave. You can know the answer at a glance. It is certainly not suitable for you. (Maybe you are already RF. Master)). If we are all ordinary people, then it is a very good way to look at it in my opinion. why? Let me first explain what I mean by "not asking for a solution." First of all, if you don't ask for a solution, you will jump over the place you don't understand for a while, and don't dig into the alley. There are really a lot of scientists in the world who have gotten into a horn. If you don't want to be an old school student wearing 1000 degree glasses, if you want to be an actual engineer, I suggest you not ask for it. If you don’t understand it, jump over and don’t dig into the alley. The advantage of this is that you will see more and more content, and the contact will be more and more wide. It is like reading a book. You can't understand the problem in the first quarter. If you must ask for a solution, you can drill it. Drill, maybe you only watched the first quarter in a year, and the problem still doesn't understand; and if you have problems in the first quarter, you don't understand, ask people if they don't want to, let go, look at the second quarter, so you After reading the two sections, there is only one question that you don't understand, and most of the time, when you go to the later chapters, you will probably untie the previously incomprehensible content. Therefore, if you don't ask for a solution, you can't say too much. You should win by volume (experience?), huh, huh.
2. Laboratory, laboratory. This is not a slogan, but a real sigh. I have never heard of anyone who does not enter the laboratory can learn microwave and radio frequency. Why do you want to enter the lab, not to do general instructional experiments, but to do some research and development experiments. What is a research and development experiment? First of all, the test is not called an experiment, and if it is not tested, it is not called an experiment. R&D experiments are to verify different design methods and results as planned, and testing is the means (so you need to understand the instrument). Many people also enter the lab, but they test the same product a hundred times a day, do not summarize, and do not analyze, so they can understand without progress. For example, an antenna matching circuit, you can test and analyze its different effects on total radiant power and total omnidirectional receiving sensitivity through different matching methods. You will know what kind of antennas are in the future, and what is the appropriate matching form. Kind, and don't have to try one by one.
3. Work notes, maybe few people will do work notes now, anyway, I used to like to take work notes. It is the same phenomenon and conclusion that appears ten thousand times. If you don't make a record, it is hard to say that you become your own. Can you become your own when you write? Yes, I am sure to say yes, it becomes your own, at least when you need evidence, you can come up with instructions, when you don’t know how to prove a phenomenon, you can pick it up to prove . How to do work notes? It's not a diary like a journal account. A useful work note can either act as a data book, or a comparison of formulas and data, or a record of test methods, or a comparison of different design options. Or you are a summary of some of the theories, or you have a record of certain cases, or .... anyway, or a lot, you should pay attention to the pictures and texts. Remember, remember your work notes, be sure to.
4. Ask experienced colleagues or teachers, and my peers are family members. I ask them, they generally don't talk about it. It doesn't matter, the soft ones don't work hard, and the radicals will provoke him. There is nothing to say about this. In short, everyone on the same issue has different opinions. Listening to others' opinions is also a way to make rapid progress. Specifically, how do you open your mouth? Think about it.
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