The meaning of "mirroring behavior", "narrow frequency response", "lowpass filter", "mixer", "IF", "RF" are all unexplained both in this article and the listed prerequisite articles.
The meaning of "mixer" might be inferred from the earlier "the basic operation of almost every radio receiver boils down to mixing (multiplying) the amplified antenna signal with a sine wave of a chosen frequency." And the meaning of "mirroring behavior" might be inferred from the earlier "we can see that every peak of the driving signal reaches the ends of the antenna perfectly in-phase with the bounce-back from the previous oscillation". But these are still explanations that rely on a good amount of past expertise and other jargon not covered in this or the author's other pages, which probably has to involve quite a lot of what most people would consider "advanced math", though as always "advanced" is relative, or alternately a lot of direct experience playing with analog signals.
The meaning of "mixer" might be inferred from the earlier "the basic operation of almost every radio receiver boils down to mixing (multiplying) the amplified antenna signal with a sine wave of a chosen frequency." And the meaning of "mirroring behavior" might be inferred from the earlier "we can see that every peak of the driving signal reaches the ends of the antenna perfectly in-phase with the bounce-back from the previous oscillation". But these are still explanations that rely on a good amount of past expertise and other jargon not covered in this or the author's other pages, which probably has to involve quite a lot of what most people would consider "advanced math", though as always "advanced" is relative, or alternately a lot of direct experience playing with analog signals.