A switch device structure includes RF1-st and RF2-nd input terminals, RFA-th, RFB-th and RFC-th output terminals, P2A-th, P1B-th and P1C-th paths, and first and second common paths. The P2A-th path includes a first terminal, and a second terminal coupled to the RFA-th output terminal. The P1B-th path includes a first terminal, and a second terminal coupled to the RFB-th output terminal. The P1C-th path includes a first terminal, and a second terminal coupled to the RFC-th output terminal. The first common path is coupled to the RF2-nd input terminal and the first terminal of the P2A-th path. The second common path is coupled to the RF1-st input terminal, the first terminal of the P1B-th path, and the first terminal of the P1C-th path. The first and second common paths cross each other on different planes to form a crossover.