Abstract: A semiconductor device includes a cell block and a data block. The cell block includes an operation circuit having a first capacitor and a second capacitor and an input circuit configured to couple the first capacitor and the second capacitor to a bit line according to differential voltages provided via word lines and corresponding to a first data. The data block includes a capacitor array having a variable capacitance corresponding to a value of a second data; and a coupling switch configured to couple the bit line and the data block. The cell block and the data block may be used to perform a Multiply and Accumulate (MAC) operation.

Abstract: Air-dielectric sandwich structures for electrically tunable microwave devices provide two types of layered structures; one type comprising a first dielectric material, a second dielectric material, an air gap between the first and second dielectric materials and an electromechanical actuator for adjusting the width of the air gap by moving the first or second dielectric materials, and the other type comprising a dielectric material, a metal wall, an air gap between the dielectric material and the metal wall and an actuator for adjusting the width of the air gap by moving the dielectric material or the metal wall. The tunable microwave devices including the air-dielectric sandwich structure are elaborated such as a tunable dielectric resonator, a band stop and a band pass filter, a phase shifter and a phase array antenna.