DESIGN METHOD OF LOW NOISE AMPLIER IN PORTABLE INTERNET TIME DIVISION DUPLEXING ANTENNA PART AND THE LOW NOISE AMPLIER

摘要

The present invention relates to a method and a low-noise amplifier LNA of the WiMAX time division duplex antenna terminal that, in addition to the external limiter 140, limiter diode is added in a low noise amplifier (110) without the implementation of the circuit (Limiter Diode) with only the receiver low noise amplifier 110 can exert on the leakage signal and the reflected wave power of the transmission power, the diode limiter and cross modulation generated in the third-order distortion component is not radiated by the antenna 100, such a low-noise amplifier 110, a sufficient signal for the final output transmit power over the design method purity (signal purity) is secured waveform characteristics ( waveform quality) and spectrum mask (spectrum mask) and at the same time improved properties, further limiting the external 140. The need to implement the circuit has a compact system design and cost-effectiveness becomes possible according to the elimination of.