I interpreted "powerful" to mean ultrawideband, multimodulation capable, fast scanning, and feature rich. Somethi9ng like: https://www.amazon.com/Uniden-BCD436HP-HomePatrol-TrunkTracker-Programming/dp/B00I33XDAK/It just it occurred to me that “powerful” is an odd way to describe a receiver. A transmitter can be powerful, the analogous attributes for a receiver would be “sensitive and selective.”
Bob
Your project is impractical. It would take you years to get to the knowledge level necessary. Sorry I can't help more.Thanks for all the friends who answered me, SDR is very interesting, but I mean what steps should go so that I can design a circuit for radio scanners and then make it.
Given your obvious complete lack of knowledge on the subject, can I suggest you take a course in basic radio technology so you can at least explain and specify what you want/need. Then a course in advanced radio design, followed by 5y learning and experimenting until you know how its done.... because that's about where I was 35y ago and that's about 1/2 competent.but I mean what steps should go so that I can design a circuit for radio scanners and then make it.
That is a big learning curve. There are several "radio kits" on the market that help you learn "1970s" radio. Here is a AM & FM kit that helps you learn two types of radios. Not a scanner unless you count turning the knob by hand. lolI mean what steps should go so that I can design a circuit for radio scanners and then make it.
This Elenco kit is brilliant. We used it as a final lab in our EE department for first year.That is a big learning curve. There are several "radio kits" on the market that help you learn "1970s" radio. Here is a AM & FM kit that helps you learn two types of radios. Not a scanner unless you count turning the knob by hand. lol
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Hello CQ1830Hi ,I'm director in movies but I like electronic and telecommunication , how to I can design or build powerful radio scanner in all frequencies , my id in your website is CQ1830 , I,m noob.
Hell and thank you for your supportHello CQ1830
First, a little encouragement. If a rock and roll star can become a consultant on missile defense to the pentagon, perhaps a director in movies can figure out how to build a powerful scanner. Check theses two videos out:
1st Video
2nd Video
While watching keep in mind that the artist that is playing the gutter (white hair, handle bar mustache) may not be familiar to you, but he is well known in the 60's and 70's generation where he composed and played with some very good bands. While watching the second video, pay attention to the discussion on "non-linear thinking" and frequency effects. It won't solve your problem but should give you some encouragement.
Now, as for your question; many have given you great answers. I thought I'd chime in to offer my 10 cents. As with any project, you need to define your requirements. "A powerful radio scanner" is a good start, but what are the requirements? For example:
1. Shall receive signals from frequencies x to y
2. Shall demodulate the following modulated signal (e.g. AM, FM, SSB, QPSK, etc.
3. Shall to have a sensitivity of z.
4. Shall use analog or digital (DSP) Technology.
etc.
This is a simple, and incomplete requirements list, but you get the idea. If you decide to use analog circuit design, you have quite a task ahead of you. On the other hand, if you decide to use digital signal processing (DSP) the good news is that there are exciting tools to use. The bad news is that there is a steep learning curve.In either case (analog or digital) there are still requirements to understand analog circuits with digital (e.g. the frontend of the receiver needs to filter, amplify, and digitize (sample) the signals you are targeting.
Some example of tools are: GNU radio (free). This is a wonderful tool that you can build all kinds of digital signal processing circuits and, with a cheap "dongle" like the RTL SDR, or more expensive HACKRF ONE, you can implement many kinds of radio receivers. You need a fair power full (modern) computer. GNU radio is typical a Linux OS application, but Windows is also supported. Although I am a MacOS fan, I have never attempted installing GNU on MacOS. There is even an effort to run GNU radio on some new embedded systems. In particular, the Xilinx Ultra96 FPGA. This is very exciting in my opinion, but the effort is not mature yet.
If you want to think really big, using and FGPA you can implement a direct conversion receiver but not in all bands.
This is just a sampling of what is possible. I don't mean to overwhelm (nor talk down to you). I want you to be inspired and learn more about the above if you are so inspired. Remember what I said about non-liner thinking and the second video. Google 'Jeff "Skunk" Baxter and pay attention to his discussion on non-linear thinking. Use Google to learn more about the technology are course on-lin and, of course, Google.
I hope this give you some inspiration and encouragement.
Dave