In order to solve the problems of less controllable channels

larger size and higher insertion loss of traditional switches

a star type radio frequency（RF）micro-electro-mechanical system（MEMS）four-pole four-throw（4P4T）switch is designed on the basis of single-pole single-throw（SPST）RF MEMS switch

which can control the on-off of multi-channel signals.HFSS simulation software is used to optimize the key parameters of the device such as insertion loss

isolation and standing wave ratio.The results show that the insertion loss of this RF MEMS 4P4T switch is better than 1.19 dB@26.5 GHz

the isolation is better than 31.75 dB@26.5GHz

the standing-wave ratio is less than 1.7

and the overall size is 1.2 mm×2.174 mm×0.51 mm when the frequency range is DC～26.5GHz.The four-pole four-throw switch has the advantages of low insertion loss

small volume

multi-channel adjustable

etc.It can be integrated with power divider

phase shifter

delay device

antenna and other monolithic chip

and can be used in communication

radar

navigation and microwave test instrument systems to achieve multi-channel signal distribution

phase shift

delay and reconfigurable functions.