I would really appreciate your help, since I'm not a specialist in engineering, but a biologist.
I'm performing experiments where I apply RF broadband signal. I have a signal generator (Rohde & Schwarze) and an Amplifier (emv - Amplifier Research). The only problem for me is a transmitting antenna.
I need a broadband signal as homogeneous and as clean of extra noise (harmonics etc.) as possible in the 1m*1m*0.5m space.
So far I've been using a loop antenna made of a copper tube. But this antenna is not transmitting good in my range (10MHz broadband signal from 80 to 90 and from 300 to 310 MHz). The diameter of the antenna is 2m, and I thought it should be the major problem.
Does anyone have a suggestion how should I optimize the setup: different size of antenna, dipole antenna instead of a loop antenna?