Patent ID: 7324840
Filing Date: 2008-01-29
Classification: H01Q

Abstract:
1. A short-range on-vehicle radio communication system having an in-car radio communication function, comprising: a car navigation unit having a main body including a sheet metal chassis portion and a panel portion attached directly to the sheet metal chassis portion; at least a first and a second two-way transmission antenna for short range radio communication, each antenna being connected with the main body by an antenna cable, each antenna being able to receive and to transmit radio communication signals and each antenna being arranged inside the vehicle and outside the sheet metal chassis of the main body of the radio communication system, wherein the first two-way transmission antenna is arranged in the interior car room and the second two-way transmission antenna is arranged in the trunk of the vehicle; at least one mobile phone, the mobile phone communicating with the car navigation unit by using one of the first and second two-way transmission antennas, where signals transmitted and received from outside the vehicle are transmitted to and received from the at least one mobile phone via the car navigation unit; wherein an antenna output of the highest reception level is selected from the at least first and second two-way transmission antennas for radio communication; at least one microphone connected to said main body used to obtain signals from within the interior of the vehicle; and at least one speaker connected to said main body used to reproduce signals received at said main body, within the interior of the vehicle.