TY - JOUR ID - 72204 TI - A New Design of Dual Band Phase Shifter using MEMS Technology JO - International Journal of Engineering JA - IJE LA - en SN - 1025-2495 AU - Razeghi, Alieh AU - azizollah Ganji, bahram AD - Electerical Engineering, Babol University of Technology AD - Electrical Engineering, Babol University of Technology Y1 - 2013 PY - 2013 VL - 26 IS - 11 SP - 1337 EP - 1346 KW - MEMS KW - Dual Band KW - Phase shifter KW - coplanar waveguide KW - return and insertion losses DO - N2 - Abstract - This paper presents a new design of microwave microelectromechanical systems (MEMS) phase shifter for dual band wireless local area network (WLAN) applications. A bit is designed which product a constant phase shift of 11.25° by switching between two line that consist of 12 and 6 unitcells in each frequency band. A unitcell is constructed by gold membrane suspended over the coplanar waveguide (CPW) that can be moved vertically by electrostatic actuation which can ultimately be used for changing the operating frequency band. Two states of unitcell are used to switch between two frequency bands of 2.4 GHz and 5.2 GHz (IEEE 802.11 standard employed in dual band WLAN systems). First, a closed form equation of simplified model of structure is obtained. Then using this equation and advanced design system (ADS) simulator, the dual band phase shifter is designed. The validation of modeling and equations are demonstrated using the High Frequency Structure Simulator (HFSS). At the frequency of 2.4 GHz, maximum return and insertion losses are -16.96 and -0.12 dB, respectively that exhibit a phase shift efficiency of 93.75 °/dB (60.22 °/cm). At the frequency of 5.2 GHz, maximum return and insertion loss are -16.86 and -0.15 dB, respectively exhibiting a phase shift efficiency of 75 °/dB (60.22 °/cm). The new proposed design is only to achieve a dual band phase shifter using MEMS technology which has low loss and weight with high linearity respect to the other technologies. UR - https://www.ije.ir/article_72204.html L1 - https://www.ije.ir/article_72204_8810e519a34c0dc365f23dbe9e2065fa.pdf ER -