Patent ID: 9026073
Filing Date: 2015-05-05
Classification: H01Q

Abstract:
1. An antenna device, comprising equipment with lead wires, an antenna matching network, a Low Noise Amplifier (LNA), and a Frequency Modulation (FM) chip, wherein the equipment with lead wires is configured to be reused as a receiving antenna to receive FM signals; the antenna matching network is configured to debug a receiving performance of the receiving antenna; the LNA is configured to increase a signal-to-noise ratio of the FM signals; and the FM chip is configured to demodulate the FM signals received by the equipment with lead wires and transmit audio signals obtained after demodulating to a speaker; wherein the LNA increases the signal-to-noise ratio of the FM signals in a manner that: the LNA performs blocking processing on the FM signals by utilizing a capacitor of an LNA circuit and amplifies the FM signals which have been subjected to the blocking processing performed by the capacitor by a triode of the LNA circuit; and the LNA performs blocking processing on the FM signals amplified by the triode by utilizing the capacitor of the LNA circuit and then transmit the FM signals to the FM chip.