Patent ID: 7050769
Filing Date: 2006-05-23
Classification: H01L,H04B

Abstract:
1. An electronic apparatus used for a wireless communication system that communicates by use of two or more frequency bands, wherein at least a set of an output power amplifier, a matching circuit, and a low-pass filter is provided correspondingly to each frequency band, the sets are mounted on one insulating substrate, and the output power amplifier, the matching circuit and the low-pass filter of each set are connected in this order, wherein in the case that the attenuation magnitude of the high order higher harmonic wave of any one of the frequency bands is specified to the first level to the double higher harmonic wave, the double higher harmonic wave is reduced due to the filtering characteristic of the low-pass filter, and wherein the phase of the double higher harmonic wave impedance in view of the low-pass filter side from the connection point between the matching circuit and the low-pass filter is deviated from the phase matching position by means of the low-pass filter to thereby reduce the double higher harmonic wave level to the first level or lower.