Inductive Antenna Coupling In Regenerative Receivers

Inductive coupling is probably the most widely used form of coupling of the antenna to the RF input tank in radio receivers. For superheterodyne receivers this topic has been treated extensively in the literature on radio receiver design. However, for regenerative receivers using inductive feedback that were quite popular as low-cost commercial receivers in Europe from the 1930s to the end of the 1940s, little can be found on the issue of inductive antenna coupling with respect to the requirements and circuit behavior that arises with regenerative circuits. In the predecessor of this paper the influence of an inductively coupled electrically short antenna an regeneration has been studied focusing on the feedback behavior if the antenna tank’s resonant frequency falls into the reception frequency range. In this paper, we shall focus on the more common cases where the antenna tank is driven either well below or well above it’s resonant frequency. Also, we shall cover more aspects of the antenna coupling, including voltage transfer and detuning of the RF input tank.

• Inductive Antenna Coupling In Regenerative Receivers (189 KB)

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