the electrode is located close to a portion where the electric field intensity generated by the electromagnetic waves becomes strong in the antenna when {HEAD ~ the electromagnetic waves} are fed to {TAIL ~ the antenna} 
the electrode is located close to a portion where the electric field intensity generated by the electromagnetic waves becomes strong in the antenna when { HEAD ~ the electromagnetic waves } are fed to { TAIL ~ the antenna }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL