Amplitude-modulation antenna of noise reduced

Amplitude-modulation antenna of noise reduced

  • CN 1,497,778 B
  • Filed: 09/26/2003
  • Issued: 11/21/2012
  • Est. Priority Date: 09/27/2002
  • Status: Active Grant
First Claim
Patent Images

1. tunable AM wireless antenna that form is the ferrite bar loop aerial comprises:

  • Ferrite bar;

    Has the resonance structure that forms the balancing antenna circuit;

    Wherein said resonance structure has first winding construction (12A) and second winding construction (12B) around said ferrite bar, and each winding construction all has with respect to the inside end of stick end and outer end;

    It is characterized in that;

    Variable capacitance diode (22A) tuning structure provides controllable electric capacity between the inside end of the inside end of said first winding construction and second winding construction,The DC path comprises said second winding construction (12B) that is connected to said variable capacitance diode (22A), and said DC path is configured and arranges to said variable capacitance diode harmonic ringing is provided,The inside end that the outer end of wherein said first winding construction (12A) is configured in order to receive external signal and said first winding construction is connected to outer detecting circuit;

    AndThe outer end of said second winding construction (12B) is configured and arranges in order to receive said harmonic ringing.

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