I am building a ground and wall penetrating frequency modulated continuous wave radar. The only components that I have not been able to track down are the antennas. I need two antennas (one for transmit and one for receive) that cover the frequency range of 100MHz to 1GHz (or as much of that range as possible). I have searched a lot of different sites and was hoping someone here might be able to suggest something I haven't come across yet.
This is for a university project, so I am unfortunately limited by budget and an imperfect understanding of what exactly I need.
Basically what I am trying to do is transmit a ramped signal from the low end of my range (100MHz) up to the high end of the range (1000MHz) into the ground and then be able to receive the signals back to calculate if they are bouncing off of anything buried underground. The lower frequencies allow me to see objects at greater depths. I am hoping to find something that will cover the whole range, but so far there is a plethora of options in the 1GHz and above ranges and almost nothing ultra wideband in the lower than 1GHz range.
Specifications I have so far:
- Freq Range: 100MHz-1000Mhz
- Impedance: I planned on an external network to match, so whatever is available.
- Size: Need to fit 2 antennas in an approximate area of 2x3 ft maximum
- Price: Budget for 2 antennas $100