Patent ID: 7532718
Filing Date: 2009-05-12
Classification: H04B,H04R

Abstract:
1. A headphone receiver apparatus for use with low power transmitters, said apparatus comprising: a pair of headphone speaker enclosures connected by a headband; receiver electronics contained in one of said enclosures; an antenna element generally concentric with but radially offset from said headband, said antenna element disposed between and connected to each of the speaker enclosures in said pair of head phone speaker enclosures and positioned such that a spacing from the user's head of at least 0.5 inches is maintained over substantially all of the length of said antenna element; wherein said receiver electronics includes a receiver integrated circuit (IC), further including a low noise amplifier connected to said receiver IC and a lumped-element band pass filter interposed between said antenna element and said low noise amplifier so as to minimize the level of other strong inband signals presented to the low noise amplifier, thereby minimizing intermodulation products.