Hello all,
I'm trying to design a radio transmitter at frequency 4Mhz. I have couple of problems but I will post them each in separate thread.
The bigest problem is the Antenna design. At 4Mhz the half-wavelenght antenna will be 37.5 m, which is not acceptable at all due to space limits, even quarter-wavelenght is not acceptable.
Q1) I need some help on how to design a good ( if possible) antenna to use with 4 Mhz that will provide good transmition.
Q2) I heared about the loop antenna which is tuned using a capacitor, but I don't know about its performance for transmitting, and how is it fed and what is the its impedence.
Q3) if I had to switch to a higher frequency (hupfully not) how can I design and feed the quarter-wavelenght antenna.
Please help me by providing me with practical hints, I have read alot alot of books and web pages but I couldn't get the right ansower I'm looking for.
Thanx in advance for any help.
I'm trying to design a radio transmitter at frequency 4Mhz. I have couple of problems but I will post them each in separate thread.
The bigest problem is the Antenna design. At 4Mhz the half-wavelenght antenna will be 37.5 m, which is not acceptable at all due to space limits, even quarter-wavelenght is not acceptable.
Q1) I need some help on how to design a good ( if possible) antenna to use with 4 Mhz that will provide good transmition.
Q2) I heared about the loop antenna which is tuned using a capacitor, but I don't know about its performance for transmitting, and how is it fed and what is the its impedence.
Q3) if I had to switch to a higher frequency (hupfully not) how can I design and feed the quarter-wavelenght antenna.
Please help me by providing me with practical hints, I have read alot alot of books and web pages but I couldn't get the right ansower I'm looking for.
Thanx in advance for any help.