The unique structure for phase shifter to duplex Rx and Tx SAWs has introduced. The phase shifter has the rounded shape spiral structure without any crossover. The phase shifter has been implemented in LTCC packages of 3.0×2.5×0.4mm (typical). The phase shifter has very low transmission loss and very low coupling since the phase shifter is almost completely shielded with the ground plate. The simulation result shows that the above mentioned phase shifter has superior insertion loss characteristics than conventional transmission line with meander structure. Using the above explained phase shifter we have fabricated SAW W-CDMA (Wideband Code Division Multiple Access) antenna duplexers for band 2 and band 5. The measurement results of the above duplexers are shown.