Abstract: A multi-band, electro-mechanical programmable impedance tuner for the frequency range between 10 and 200 MHz uses cascades of three or more continuously variable mechanical capacitors interconnected with sets of low loss flexible or semi-rigid cables; for each frequency band a different set of cables and capacitors are used. The cables and/or variable capacitors inside each tuning block are switchable manually or remotely. Multi-section variable capacitors are also used. Instantaneous impedance tuning is effectuated by changing the state of the capacitors using electrical stepper motors. The tuner is calibrated using a vector network analyzer and the data are saved in the memory of the control computer, which then allows tuning to any user defined impedance within the tuning range. Reflection factor values between 0 and higher than 0.9 can be obtained using this tuner at all frequency bands.

Abstract: An integrated circuit metal oxide metal (MOM) variable capacitor includes a first plate; one or more pairs of second plates positioned on both sides of the first plate; one or more pairs of control plates positioned on both sides of the first plate and positioned between the pairs of second plates; and a switch coupled to each control plate and a fixed potential.

Abstract: A variable capacitor device includes a stator and a rotor. The stator includes first and second stator plates separated by electrically insulating material. The rotor includes first and second rotor plates connected by a rod, the rotor being configured to move axially for adjusting alignment of the first rotor plate relative to the first stator plate and the second rotor plate relative to the second stator plate, respectively. The first stator plate and the first rotor plate form a first variable capacitor, and the second stator plate and the second rotor plate form a second variable capacitor connected in series with the first variable capacitor. A first capacitance of the first variable capacitor and a second capacitance of the second variable capacitor are simultaneously adjustable upon the axial movement of the rotor to provide an adjustable total capacitance of the variable capacitor device.

Abstract: There is provided a capacitor unit including plural capacitors, each including end face electrode at one end face and side face electrode having a polarity different from end face electrode at a side face, arranged side by side; bus bar connected to end face electrode of capacitor, and partially connected to side face electrode of adjacent capacitor unit; and a circuit substrate arranged at the one end face sides or the other end face sides of plural capacitors; wherein bus bar and the circuit substrate are electrically connected through conductive portion arranged from bus bar towards the circuit substrate.

Abstract: The capacitor module includes a capacitor, in which a screw hole is arranged on an outer bottom wall surface of a capacitor case housing a capacitor element, and a heat dissipater, on which a plurality of capacitor cases are fixated by screwing fixation screws in the screw holes of the capacitors. As a result, for example, the capacitor can be fixated with reliability and durability secured even under a condition where very strong vibration is continuously applied, for example, when the capacitor module is mounted on construction machinery. Further, because, an adherence of the outer bottom wall surface of the capacitor case on a fixation surface of the heat dissipater is strengthened by screwing the fixation screw in the screw hole, the capacitor can be cooled down by transferring heat produced by the capacitor to the heat dissipater as needed.

Abstract: A capacitor is provided having a tough surface portion which prevents cracking that tends to occur when the capacitor is built-in or surface-mounted on a wiring board. A ceramic sintered body of the capacitor includes a capacitor forming layer portion, a cover layer portion and an interlayer portion. The capacitor forming layer portion has a laminated structure wherein ceramic dielectric layers and inner electrodes connected to a peripheral portion of capacitor via conductors, are alternately laminated. The cover layer portion is exposed at a surface portion of the ceramic body and has a laminated structure wherein ceramic dielectric layers and dummy electrodes not connected to the capacitor via conductors, are alternately laminated.

Abstract: An electronic element module and an electronic device using the same are provided. The electronic element module includes a circuit board and a plurality of electronic elements. In one embodiment, the circuit board has a plurality of leg-holes. Each of the electronic elements includes a body and a plurality of legs that connected to the body. Wherein, the bodies of the electronic elements are glued each other, and the legs of the electronic elements are partially plugged in the leg-holes. In another one embodiment, the circuit board has a plurality of contacts. The electronic element is disposed on the circuit board with a gap therebetween. The electronic element has a plurality of terminals that electrically connect to the contacts of the circuit board correspondingly. Otherwise, the gap is filled with glue.

Abstract: A capacitive transducer of multi-layer construction includes two rotor plates supported by flexible springs, the plates being spaced apart and rigidly connected by a stem. One rotor plate my be used as either a pickup electrode or a grounded target electrode for determining position, displacement, or load force. The second rotor plate may be used for electrostatic actuation without interfering with or destroying circuitry associated with the first rotor plate. A number of improvements are disclosed including a hollow rotor plate structure for reduced moving mass, buckling resistant features for the springs, improved spring anchor joint design for reduced creep and hysteresis, and material selection and matching for reduced thermal sensitivity.

Abstract: Micro-Electro-Mechanical System (MEMS) Variable Capacitor Apparatus and Related Methods. According to one embodiment, a MEMS variable capacitor is provided. The variable capacitor can include first and second electrodes being spaced apart, and at least one of the electrodes being movable when a voltage is applied across the first and second electrodes. The variable capacitor can also include a first conductive plate attached to and electrically isolated from the first electrode. Furthermore, the variable capacitor can include a second conductive plate attached to the second electrode and spaced from the first conductive plate for movement of at least one of the plates with respect to the other plate upon application of voltage across the first and second electrodes to change the capacitance between the first and second plates.

Abstract: A variable passive component is provided for fabrication on a microelectromechanical system (MEMS) device. A conductive portion is provided on a low-profile sliding dielectric sheet that cooperates with a conductive portion disposed on a substrate to provide a variable passive component. The passive component can be a variable inductor provided by moving a shorted spiral inductor formed on the dielectric sheet over a spiral inductor on the substrate with varying degrees of overlap causing varying inductance values. The passive component can be a variable capacitor that consists of a large conductive pad on a dielectric plate which slides over two adjacent pads on the substrate with varying overlap causing varying capacitance values.