Thanks for the help guys,
I currently have a matching network between the chip and the antenna using a shunt capacitor. The shunt capacitor is wired from, the node between the matching capacitor and the antenna, and ground. How do you determine the best value for the shunt? I was going to...
Hey guys, I am trying to design an Inductive Square Antenna Coil that will be milled onto my PCB. I am slightly confused when it comes to the matching circuit. To my understanding the matching circuit is there to have the same impedance value of the antenna, correct?
So my matching circuit...
Hey guys,
I love to read and learn about Quantum Physics and have been looking for good suggestions on books. I don't want a complete beginners book, I am an Electrical Engineer so I have a decent background in math and physics, by no means am I am expert. I love all the theory behind QM but...
Right now it is all simulation but I would like to build it but wanted to make sure the simulation worked first.
The simulation is only a 1V signal but real application would be a bit larger (5V). I did 1V in the simulation because I wanted to verify the -3dB point was were I wanted it to be...
Hey guys,
So I have been running some simulations where I am creating a BPF around the FM band and when I measure the signal on the output, it's much lower than my original signal. So I thought if I put a buffer between the LPF and HPF to electrically isolate the circuits this would help, but...
Hey guys,
So this is entirely theoretical and I am just curious if its possible and how it could be done. But how can you go about changing the bandwidth of a particular signal?
So a lot of times we have a signal at a given frequency, and there might be a little bit of aliasing into other...
Hey guys,
Not claiming to be an expert on numerical methods here but I am doing some digital integration using simpson's rule that takes 10 samples a second to provide me with the "approximate" integral for that time period.
Right now I am currently taking the magnitude of the value I...
Very interesting idea, thank you.
I wasn't planning on the detectors antenna being too far from the phone itself, a couple of feet maybe (3ft). Unless you think it can go farther?
For my own knowledge: why do you need to down convert the bands (lets assume I am only going to use the...
I would google around for a 5W solar panel, nothing bigger than that really otherwise the panels might get to large to camp with. Since solar panels output DC you will need to place in a 5 Volt regulator between the panel and your phone (assuming your battery is rated at 5V). Then the output...
Hey guys,
Does anyone know about how much transmission power is outputted from a cell phone call? I have read it's around 100 mW (depending on distance from the tower), anyone ever verified this?
I want to try and use the signal created by a phone call (to detect when a phone call is...
You should also make menition of what kind of source the 5V is coming from... a power supply? Battery? That is help determine the power you have available.
Great! Thanks for the recommendation. Okay I was going to try something like that but I was afraid there was going to be a ton of noise. Is it possible that Ferritte beads would help that at all, or an I am doomed to have the noise? lol
Another quick question regarding the cables. I have the 50 ohm coax (RJ-58). What is the best way to connect a wire to a coax cable.
In other words, the signal I received out of an IC chip (mixer) is just on a standard IC pin or wire. I want to get that into a coax cable. What is the...