Abstract
The demonstration of a wideband DC-contact MEMS series switch on an alumina substrate is reported. The switch is based on a cantilever beam design. The tip of the cantilever beam was formed into a fork tip design, and its RF performance was measured and compared with a regular rectangular tip. This design reduced up-state capacitance from 10 to 3.8 fF. The beam with fork tip exhibited high isolation: -39, -32 and -17.3 dB at 5, 10 and 77 GHz, respectively. The measured insertion loss was -0.142, -0.172 and 0.36 dB at 5, 10 and 77 GHz, respectively. The switch had low actuation voltage (les39 V) and a relatively fast switching time of 45 mus. To our knowledge, this is the first demonstration of a high-performance cantilever beam design DC-contact MEMS series switch at W-band frequencies.
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