How to learn RF technology , it is always a distressed question for a lot of RF engineers regardless of the past or now. Today, we will share with you some main works on how to learn RF well?
HR now always divide engineers into microwave and RF filed, generally we can distinguish the work content from the name of needed RF engineers. For example, if a job is “microwave engineer” or “ RF engineer”, and the company is doing communication equipment, then the work should be small signal low noise amplifier, frequency synthesizer, mixer as well as design work like power amplifier with cell circuit or circuitry system. If a job is “RF engineer”, and the company is doing RFID, ether be a micro strip antenna or design work like power amplifier, low noise amplifier or frequency synthesizer( high FR with 900MHZ or more), or only design work of electric fields or power amplifier( below 30MHZ); Others like mobile phone company, those are all dedicated “mobile RF engineers”.
Then what the specific work of these RF engineers? Nothing less than the following:
For some projects within communication equipment companies, RF engineer needs to charge all the entire RF system for further analysis, which includes guiding system design, allocating model index, standardizing EMC principles, proposing deploy accessory function and performance requirements;
Block diagram design and circuit design are always the two basic fundamental characteristics for RF engineers, which expending from the system design. How to beat the target of system design, it is also the final goal of circuit principle, meanwhile, it’s also the antecedents of the device election, since the process of circuit design is also a process of device election.
To achieve the requirements of the circuit requirements, it is essential to select the appropriate device, which is carry on with circuit principle design at the same time. How to select a appropriate device, or which one is more suitable for our product design compared to the same type devices? Cost, performance, technological requirements, package, supplier quality, delivery time and so on, these are also the factors needs to be considered.
Whether it is ADS, MWO, Ansoft or CST, HFSS, you will always master one or two software simulation. It may not allow you achieving 100% accuracy of your design, but will not make you deviating from the basic direction, at least they are accurate in the qualitative simulation side. So, you have to learn one or two or more kinds of simulation software, its basic function is to analyze your design qualitatively, errors may lasts, but it can enhance your confidence.
A theory is like a theoretical foundation, 10,000 applications can only be based on one theory, several products may also have one schematic diagram as long as wiring is different, such as mobile phones, many companies are used to design for a same mobile phone program, though the schematic diagram is same, the PCB board come out with different company is different, differences not only shows on the shape, but also the performance. Different performance, in fact, is the difference between PCB LAYOUT. PCB which confirmed to the requirements, layout and wiring includes the side of performance, appearance, technology, EMC and so on. Therefore, PCB LAYOUT is also a very important skill.
This debugging is different from the production debugging. Production debugging is mandatory, while the focus of RD debugging is identifying problems and solving problems. Debug is a process of summarization and experience accumulation, it is not accumulating debugging experience, it is accumulating design experience; Many problems may not be discovered in the design stage, it may be discovered after debugging, and then you may know how to avoid and amend these problems. Debugging is also a most effective routine to practice theory, we can realize the theory qualitatively through debugging.
Testing is actually serve for debugging, and debugging is serve for design (while design is for the market). RF engineers have to master different kinds of RF test equipment, including but not more than the spectrum analyzer, network analyzer, signal source, oscilloscope, power meter, noise factor tester, comprehensive tester and so on. If one cannot test, it cannot debug effectively, if cannot identify problems, then how can you improve? So, please do not despise testing, all the masters are transferred from design to testing in the abroad RF company, which is worthy of our thinking.
If conditions allow, please do some basic level job by yourselves, do the welding by yourselves, it is impossible that you can always find someone stay on your side waiting for changing capacitance and inductance when you debug. So, never be a man have high aims but with low abilities, do your own thing.