Even if a device can detect a radio reciever, I would think it would be very hard to make out a sdr tuned to 1090 mhz with all the other radio and TV Devices in your home for example television, wireless and cell phones, wifi, bluetooth, wireless keyboards and mice, am and fm radios, that would be amazing technology if it existed to do that, plus not sure what it would accomplish if the could, at least in the US its not illegal