Gravitational-wave versus electromagnetic-wave antennas

Unlike radio waves, gravitational waves have not yet been conclusively detected. However, there is indirect evidence from the slow decay of binary-pulsar systems. The author describes some of the gravitational antenna hardware, and tries to relate it to the more-familiar antennas of radio, radar, and astronomy. Particularly noted is the phenomenon that an electromagnetic antenna readily intercepts the time-varying wave, whereas a gravitational wave readily passes right through its counterpart, with minuscule energy transfer