cuauhtle
Newbie level 4
Hi,
I want to build a RF circuit, which can measure the frequency of the radio wave. The range is quite wide 100-1000MHz. The accuracy is not that important for the time being.
Also I probably will use multiple antennas whose BW is wide for different regions (like 315MHz, 433MHz).
Having few experience in RF world, I have been reading some documentation for some weeks, I quite understood the antenna phase (I mean the structure of the antenna and building the resonant/matching circuit), but following that, it seems it is a must to use a receiver IC to amplify/filter the waveform (Unless I design the LNA, PA, mixer or even PLL? etc.).
From the data-sheets of the receivers that I have read so far -like rfRXD0420, ATA5743 etc- the conversion to intermediate frequencies (on the order of tens of MHz), amplification, filtering and demodulation is done in-circuit and mostly only an IF signal which is modulated by an external crystal and a low frequency data is given as an output to user-which will not allow me to observe the UHF signal.
Here best option seemed me to design the blocks, which are contained in the IC, myself but in beforehand I wanted to ask you if I can manage to get the signal by using any receiver IC's output pin. Once I can manage that, I plan to use a frequency divider circuit and use its output to count the frequency which I had already managed to build using a basic micro controller.
I hope I could be clear about the problem,
-Of course I do not ask for a solution of my project but tips, advices and resources.
Thank you.
cuauhtle
Microchip's rfRXD0420 www.datasheets.net/pdf/microchip.com/70090a.pdf
Atmel's ATA5743:www.atmel.com/dyn/resources/prod_documents/doc4839.pdf
I want to build a RF circuit, which can measure the frequency of the radio wave. The range is quite wide 100-1000MHz. The accuracy is not that important for the time being.
Also I probably will use multiple antennas whose BW is wide for different regions (like 315MHz, 433MHz).
Having few experience in RF world, I have been reading some documentation for some weeks, I quite understood the antenna phase (I mean the structure of the antenna and building the resonant/matching circuit), but following that, it seems it is a must to use a receiver IC to amplify/filter the waveform (Unless I design the LNA, PA, mixer or even PLL? etc.).
From the data-sheets of the receivers that I have read so far -like rfRXD0420, ATA5743 etc- the conversion to intermediate frequencies (on the order of tens of MHz), amplification, filtering and demodulation is done in-circuit and mostly only an IF signal which is modulated by an external crystal and a low frequency data is given as an output to user-which will not allow me to observe the UHF signal.
Here best option seemed me to design the blocks, which are contained in the IC, myself but in beforehand I wanted to ask you if I can manage to get the signal by using any receiver IC's output pin. Once I can manage that, I plan to use a frequency divider circuit and use its output to count the frequency which I had already managed to build using a basic micro controller.
I hope I could be clear about the problem,
-Of course I do not ask for a solution of my project but tips, advices and resources.
Thank you.
cuauhtle
Microchip's rfRXD0420 www.datasheets.net/pdf/microchip.com/70090a.pdf
Atmel's ATA5743:www.atmel.com/dyn/resources/prod_documents/doc4839.pdf