Hi, I know that to receive or inject a signal into a rectangular waveguide (I'll just call it a waveguide from now on with the assumption that I mean rectangular waveguide), you can get a dipole of some sort, and poke it into the waveguide. What I'm wondering about is, if I got a dipole antenna (for example, I I stood an old-school mobile phone up in waveguide) and put it in the waveguide and excited it, what would happen? As far as I know, the dipole produces TEM waves; however, the waveguide doesn't support TEM, so what will it do? I'm pretty sure it's got to transmit somehow, so does it somehow convert it into TE? Thanks.