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For high power applications you essentially need a current source for each LED. I do not believe that it is a good viable solution to place several low power LED's in parallel without somesort of a series resistor.
Ypu could look at ansoft designer - student version which is free to download. This has a system simulator and should be able to do some of the basic transceiver system calculations.
Shogun
Kouly is right, if you are using it in an digital comms system and good BER is critical then the stated phase noise is probably a little high at 100kHz offset figures of -100dBc/Hz or better is good and desirable.
Shogun
rar filr
You could always save it to a usb key and then use winrar to open in windows, burn what you want to CD and then open it in your linux system. Always a work around.
Shogun
If you like you can download Ansoft Designer - Student Version for free and there you can experiment in software with some of the system simulators that you have learnt about in the preceeding texts and applications notes
Shogun
Re: AM Mixer Design
You really should look at the signal levels at each stage of your design, a simple transistor mixer is where one sigal is applied to the base of the transistor and the other - modulating one is applied to the emitter. Other wise you could use a dual gate fet and use one of...
Re: DC bias networks
What frequency range are you working with, a Simple DC block is a capacitor that has a self resonant frequency well above what you are working on.
Regards
Shogun
20ghz bias tee
If the circuit if operating above 1Ghz and you have the board space you will need to use a radial stub. It will act like an open circuit at your frequency of interest.
Shogun
I have designed a bi directional amp for commerical purposes to work at these frequencies, (2.3G to 2.7GHz). Very stable and extremely high performance.
If you need help you can contact me with a private message
Thanks
Shogun
Re: beginer in RF
Books like Microwave engineering by pozar, Microwave Amplifiers by Gonzalez and RF Design by Bowick are excellent resources.
Interms of practical experiance, it is a case of learning on the job and building and experimenting with little circuits. This way you will get a good...
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