This strong radio signal goes through our atmosphere easily. A way to further substantiate the theory that there are other planets around other stars would be to tune in for this signal by using a radio telescope. It is known that the lightning from Jupiter's atmosphere occurs at a frequency of 10 megahertz. Therefore, if another planet were to be discovered having a lightning radio signal frequency of 10 megahertz, it could be assumed that the planet's atmosphere would be similar to that of Jupiter. Whether the signal strength is strong enough will have to wait until further experimentation and improved technology.
Current opinion is that it is unlikely the signal is strong enough based on current technology.
In science you should never say never. Other stars will produce the same type of signal. We have already observed this from relatively nearby stars. There may no way to differentiate between a Jovian planet and a star. Using our planet as shield to protect us from the strong signals from strong local noise produced by the sun and Jupiter we may increase our chances for success.