A novel DP4T antenna switch for dual-band WLAN applications

In this paper, we present a novel DP4T antenna switch with very simple control logic and high power handling capabilities for dual-band WLAN applications. The suggested DP4T switch architecture requires only two control lines. The developed DP4T switch exhibits 1.2 to 1.7 dB of insertion loss, and 27/53 dB to 23/37 dB of isolation at 2.4 GHz and 5.25 GHz, respectively. It also demonstrates 31 dBm of input P0.1dB, 35 dBm of input P1dB in 3/0 V operation, as well as better than -62 dBc of 2nd harmonics and -73 dBc of 3rd harmonics response, respectively. The MMICs are developed in a commercial 0.25-μm GaAs pHEMT process. This switch architecture is preferable for Si-based processes because substrate vias are not required due to its generic topology. To the best of our knowledge, this is the first report on a DP4T RF switch architecture with very simple control logic for dual-band WLAN applications.