Extendible antenna and microphone for portable communication unit

Claim 1

A portable communication unit comprising: a housing adapted to be hand held; a loudspeaker mounted on said housing; an antenna assembly including an antenna and a support member rotatably mounted on said housing, having a stored position with said support member positioned continguous to said housing and an operating position in which said support member extends outward away from said housing with a speaking region on said support member positioned remote from said housing; said antenna positioned along said support member; a first acoustic cavity extending along said support member from said speaking region to said housing; a microphone diaphragm positioned adjacent the housing end of said acoustic cavity; whereby said speaking region is positioned remote from said speaker when in said operating position; wherein said antenna assembly is rotatably supported on said housing to enable the rotation thereof between said stored position which is substantially parallel and adjacent to said housing, and said operating position; said speaking region includes at least one aperture through said support member and positioned on the side of said support member closest to said housing when said assembly is in said stored position; said antenna comprises a metal strip extending along said support member substantially parallel to said acoustic cavity; wherein an opening is provided on the surface of said support member opposite said speaking region, and connected to a second acoustic cavity connected to the opposite side of said diaphragm of said microphone to provide background noise cancellation; and said first and second acoustic cavities are substantially parallel channels extending axially along said support member.