The goal of the energy-efficient data communication technique known as collaborativebeamforming (CB) is to extend the network's transmission range by radiating the power of a clusterof sensor nodes in the direction of the desired base stations or access points (BSs/APs). The main lobeof the CB sample beampattern is independent of the particular node positions; however, the CBaverage pattern exhibits a deterministic characteristic. The sample beam pattern produced by the CBfor a cluster of finitely many collaborative nodes, on the other hand, exhibits sidelobes that are highlydependent on the particular node positions. This paper demonstrates a simple sidelobe control orinterference suppression approach that is appropriate for CB in wireless sensor networks. Thisapproach aims to reduce interferences at unwanted BSs/APs while maintaining the main lobesteering the desired BSs/APs. The proposed approach’s performance is evaluated in terms ofinterference suppression ability and the average number of search trials required to selectcollaborative nodes. Simulation results show that when node selection is employed with CB,interferences can be significantly reduced, and they also agree closely with theoretical results.