Re: Antenna Question
Here may be two cases. First, you have the theoretical interest (for example, when you are student). Then the answer is yes, you can transmit two or more signals with one antenna. In the second case (when you are practical engineer) you need to carefully consider antenna parameters and do not exceed some key parameters limits like power, frequency, impedance and so on. Transmitting two high level signals with poor electrical contact in antenna circuit may result in strong RFI. Moreover, nearby objects may lead to reradiation and this is another problem.