Satellite communications are the outcome of research in the area of communications in which the objective is to achieve ever increasing ranges and capacities with the lowest possible costs. With a conventional signal beam satellite the transmission capacity is limited due to its low antenna gain, so a multibeam satellite which can make the antenna gain much higher is prospective. In the multibeam system an onboard switching device is necessary to interconnect among beams. For example, the payload for SS-TDMA includes a programmable switch matrix having a number of inputs and outputs equal to the number of beams. This paper proposes a new alternative system for controlling the interconnection without onboard switch devices. This system uses Hadamard-coded CDMA as a multiple access scheme and a Multiport coupler onboard. Each earth station chooses the appropriate Hadamard code corresponding to the destination beam. The satellite which includes passive circuits using a multiport coupler autonomously controls the routing of the CDMA signals transmitted from earth stations. This system can be used effectively for sending signals from a source to a destination beam and reduces the controlling complexity. This paper presents a system model which can eliminate the onboard switching in the satellite and also the performance of the system.