Hi,
As part of an ongoing project for a remote control vehicle, I wish to design my own transmitter and receiver. My goal with this project (along with many others) is to create my own "Frankenstein's monster" with as many basic components as possible. I have an understanding of basic radio theory and have made use of 2.4ghz transceivers as well as a Bluetooth module. I understand that my design will function poorly and with limited range. I am not looking for circuits, rather general information on how to approach the theory.
Let me begin with my understanding on which basic principles must be implemented. I have some experience modulating analog signals so I will assume I can successfully modulate the signal at the transmitter and demodulate at the receiver. For ease of this thread I simply want to send and receive one frequency that is either on or off.
Transmitter: Signal of adequate power is connected to either a terminated branch of one or more wires (like a tree) or in a loop. The spatial geometry of this conductor among one or more axis must be in some multiple of the baseband frequency as to not attenuate the signal before it "exits" the conductor. As current flows in the circuit, some of this energy will radiate into open space either directionally or omnidirectional and is then available to all receivers in range before the signal is attenuated beyond recognition.
Receiver: A resonant circuit is formed at the desired frequency. As the transmitted frequency interacts with the circuit in open space, a tiny current will be induced into the circuit for as long as the frequency is transmitted. The signal is then available for amplification and demodulation.
Is my understanding reasonable? If so I would like to continue with some mathematics. Please feel free to lecture at your leisure.
Regards,
Mark
As part of an ongoing project for a remote control vehicle, I wish to design my own transmitter and receiver. My goal with this project (along with many others) is to create my own "Frankenstein's monster" with as many basic components as possible. I have an understanding of basic radio theory and have made use of 2.4ghz transceivers as well as a Bluetooth module. I understand that my design will function poorly and with limited range. I am not looking for circuits, rather general information on how to approach the theory.
Let me begin with my understanding on which basic principles must be implemented. I have some experience modulating analog signals so I will assume I can successfully modulate the signal at the transmitter and demodulate at the receiver. For ease of this thread I simply want to send and receive one frequency that is either on or off.
Transmitter: Signal of adequate power is connected to either a terminated branch of one or more wires (like a tree) or in a loop. The spatial geometry of this conductor among one or more axis must be in some multiple of the baseband frequency as to not attenuate the signal before it "exits" the conductor. As current flows in the circuit, some of this energy will radiate into open space either directionally or omnidirectional and is then available to all receivers in range before the signal is attenuated beyond recognition.
Receiver: A resonant circuit is formed at the desired frequency. As the transmitted frequency interacts with the circuit in open space, a tiny current will be induced into the circuit for as long as the frequency is transmitted. The signal is then available for amplification and demodulation.
Is my understanding reasonable? If so I would like to continue with some mathematics. Please feel free to lecture at your leisure.
Regards,
Mark
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