flashmanic
New Member
hey professionals...
i am a student...i had to work on a signal processing project...anyhow i jus decided to build a low cost mobile detector..
i just took an antenna from a fm radio and attached it to a bandpass filter (range 890 mhz to 960 mhz). i built the 2 pole bandpass filter using some pots, 2 741's and a couple of resistors n capacitors...
i set it up on a breadboard,the prob now is that although it seems to detect incomin or outgoing mobile signals, its range is rather weak. just maybe 2 metres radius max....can some one tell me how to boost its receiving range...not too much, i want it to detect maybe arnd a 4-5 metre radius detecting range...
i am a student...i had to work on a signal processing project...anyhow i jus decided to build a low cost mobile detector..
i just took an antenna from a fm radio and attached it to a bandpass filter (range 890 mhz to 960 mhz). i built the 2 pole bandpass filter using some pots, 2 741's and a couple of resistors n capacitors...
i set it up on a breadboard,the prob now is that although it seems to detect incomin or outgoing mobile signals, its range is rather weak. just maybe 2 metres radius max....can some one tell me how to boost its receiving range...not too much, i want it to detect maybe arnd a 4-5 metre radius detecting range...