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| Micro Controllers Discuss all aspects of micro controllers - building them, coding them, etc. All controllers are welcome - PIC, BASIC, Z8 Encore!, etc. |
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26th December 2007, 12:48 PM
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 RF Modules Range Optimisation hello, I'm using RF Solution's Modules for wireless data transmission. Ther are separate TX/RX units modulating at 433.92MHz. I'm using MATRIX Board, 2" wire as antenna and some 2/3" jumpers. I can get a maximum range of 25 feet, max is 250m. Do i need to extend my antenna lenght to 17.3cm? Is my MATRIX Board doing fine? how long could be the jumper wires? Please suggest, pictures are attached. THX Attachment 16192 Attachment 16193 Attachment 16194 Attachment 16195 | |
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26th December 2007, 03:00 PM
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26th December 2007, 03:13 PM
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| If I understood you properly, you are to use these jumpers only for data and DC lines and not for RF signal jumping to a point where from you could connect it to an antenna. such cases the signal is picked from the TX pin and by a shielded cable (like RG174 like), you may call it feeder cable, and extend to the point where you want to transmit. there on you connect it to the Antenna whose dimension is decided at 1/4 wave length. then the signal transfer would be optimal, even though the so called feeder may add little loss. Hope this can be of some use to you.
__________________ Regards, Sarma. | |
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26th December 2007, 03:13 PM
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| hi >>> RF Solution's Modules documentation recommends a 17.3cm antenna.
__________________ Eric "Good enough is Perfect" PIC tutorials: Gramo's: www.digital-diy.net/ Bill's: www.blueroomelectronics.com/ Last edited by ericgibbs; 7th July 2008 at 12:23 PM. | |
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26th December 2007, 03:18 PM
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| @mvs_sarma Im using jumper wires for only TX,RX,DC not for ANTENNA, im connecting antenna pin to antenna using on board soldering, is this fine? BTW, is this MATRIX BOARD gonna effect somehow? @ericgibbs Should i use this length antenna on both TX/RX units? | |
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26th December 2007, 03:46 PM
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| Nice info from Eric, and it should sort out your issue, provided the boards are optimally located in the cabinet you are using, thanks to Ericgibbs.
__________________ Regards, Sarma. | |
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26th December 2007, 05:09 PM
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| thx Ericgibbs & mvs_sarma | |
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26th December 2007, 07:35 PM
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The datasheet says both TX and RX , see the clip I posted earlier. 
__________________ Eric "Good enough is Perfect" PIC tutorials: Gramo's: www.digital-diy.net/ Bill's: www.blueroomelectronics.com/ | ||
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27th December 2007, 04:26 AM
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__________________ Regards, Sarma. Last edited by mvs sarma; 7th July 2008 at 01:14 PM. | ||
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27th December 2007, 02:21 PM
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| thx sarma, ive implemented n gonna test my unit range :-) | |
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