generate questions: It is possible to use the impedance matching concepts to construct vertical antennas substantially shorter than the 1⁄4 wavelength at which the antenna is resonant. By adding an inductance in series with the antenna, a so-called loading coil, the capacitive reactance of this antenna can be cancelled leaving a pure resistance which can then be matched to the transmission line. Sometimes the resulting resonant frequency of such a system (antenna plus matching network) is described using the construct of electrical length and the use of a shorter antenna at a lower frequency than its resonant frequency is termed electrical lengthening.
For use with more than one channel changes are made to increase what property? {sep_token} What could be coupled with an antenna to form pure resistance? {sep_token} What element would this pure resistance be coupled with? {sep_token} What phrase describes the process of purposely using a lower standing antenna at a less than peak frequency? {sep_token}