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An overview is given for the current state-of-the-art of tunable RF elements. For this purpose, tunable RF elements such as thin-film Barium Strontium Titanate (BST) varactors, Micro Electro Mechanical Systems (MEMS) based capacitive switch banks and varactors, as well as semiconductor based capacitive switch banks and varactors are reviewed. Their benefits and shortcomings are discussed and compared...
A micro-acceleration latching switch with barb latching mechanism is presented in this paper. The latching mechanism which likes a “barb” can make the switch latch reliably. What's more, the flexible contacts can prevent the switch from opening due to impact resulting from the rebound or vibration of proof mass when the switch is latched. The stops which limit displacement will also improve the reliability...
A Ka-band 3 bit RF MEMS switched line phase shifter implemented in coplanar waveguide (CPW) on Borofloat™ glass substrate is presented. The basic switched line phase shifter unit is composed of two single-pole double-throw (SPDT) switches with phase offset transmission line lengths. Air-bridge with step compensation technique is used to improve the mm-wave performance of CPW discontinuities such as...
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