Antenna for vehicles
AssigneeHyundai Motor Company
InventorTae In Chung
Life of this patent
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Abstract
An antenna for vehicles includes a first AGC unit and a second AGC unit. The first AGC unit determines the strength of a signal, which is input to the input stage of an amplifier without passing through a transistor. Depending on the determination result, the first AGC unit attenuates the signal and output the attenuated signal to the transistor. When a signal having a value equal to or greater than a reference value is input to the input stage, the second AGC unit operates so as to output the signal without passing through the transistor. According to the antenna, both signals in a strong electric field area and signals in a weak electric field area close to the strong electric field area can be effectively controlled.
Claims5
An antenna for vehicles, comprising:
- a transistor;
- a first Automatic Gain Control unit that attenuates an input signal from an amplifier input terminal and outputs the attenuated signal in the case that the value of the input signal exceeds a threshold value;
- and,
- a second Automatic Gain Control unit that outputs the signal of the first Automatic Gain Control unit without making the signal pass through the transistor if when the value of the output signal of the first Automatic Gain Control unit is over a predetermined value.
Dependencies are inferred from the claim text.