Assertion: antenna's frequency | /r/HasProperty | changed
Facets:
Source sentences:
text: To operate over a large frequency range the loading coil often must be adjustable, and adjusted when the frequency is changed to limit the power reflected back towards the transmitter.
text: The capacitively loaded antennas used at low frequencies have extremely narrow bandwidths, and therefore if the frequency is changed the loading coil must be adjustable to tune the antenna to resonance with the new transmitter frequency.
text: To operate over a large frequency range the loading coil often must be adjustable, and adjusted when the frequency is changed to limit the power reflected back towards the transmitter.