Home |
Search |
Today's Posts |
#1
|
|||
|
|||
What is a wire antenna's impedance?
I searched all over the Internet and many books but just could not find
a formula or rough number of a wire antenna's impedance (not dipole or anything else, just a simple, plain wire). I need this number to match my small transmitter's final stage output, about 10mW, at 450MHz. The final stage's transistor has fT of 6GHz, and is not unconditionally stable at 450MHz. So I need to match it using Smith Chart. I know those portion of work. But I just don't know the wire's impedance's range, say, is it in the 50-80 ohms or in the 500-600 ohms range or even 1000-2000 ohms? Right now I do not guess this number right, and my transmitter seems always oscillating at a wrong frequency. So take an example, if I use a wire antenna, say, 22 AWG, spools of solid, and the length=wavelength/4, what is its approximate impedance? Thanks. |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Multi-Band Shortwave Listener (SWL) Antennas : Windom - Dipole - Random Wire | Shortwave | |||
Radial Wire Antennas - by Peter Chambers | Shortwave | |||
Two Shortwave Listener (SWL) 10:1 Baluns for Random Wire Antennas | Swap | |||
Shortwave random-wire antenna question | Shortwave | |||
Question for better antenna mavens than I | Shortwave |