A resonant rotating transformer design increases efficiency while maintaining the small dimensions of devices in which the transformer is used. The inventive concept lacks a ferrite or other metal core and instead uses at least two secondary winding members positioned near a primary winding member on a non-magnetic base. The lack of a ferrite core increases the overall lifespan and efficiency of the resonant rotating transformer while permitting the resonant rotating transformer's small dimensions of substantially under 100 mm, as well as resistance to stress and vibrational loads. The resonant rotating transformer is optimized for holographic fan displays but is useful for other electronic devices. Variations of sequential and parallel alignment for elements of the at least two secondary winding members, as well as various winding arrangements, enable changes of properties of the resonant rotating transformer.

A rotary connector module for displays has at least one stem and rotor parts. A rotary rotation system containing a stator part base is disposed atop a winding and a magnetic system of the rotor part, the magnetic system disposed above or outside of primary and secondary winding members. An electrical power transmitter carries wireless electrical power from stem to rotor part, with the diameter of each stem or rotor part smaller than the diameter of the magnetic system. A wireless transmission system contains a hollow shaft disposed in the at least one rotor part, an at least one signal transmitter disposed on the at least one stator part, and an at least one signal receiver disposed on the at least one rotor part, with the signal receiver at the end of and below a base of the hollow shaft.

Guanella topology balun/unun impedance transformer contains cascaded, i.e., series-coupled, coils of different sizes implemented in RF CMOS technology. The cascading of differently-sized coils provides for a large resonance-free operating bandwidth. The shunt inductive loading maximizes low frequency performance.

A switch-type phase shifter including a phase shifting unit is provided. The phase shifting unit includes two half circuits and a first switch connected to the half circuits and receiving a first control signal. Each half circuit includes a first variable capacitor, a second variable capacitor, a second switch and a variable inductor. The two ends of the first variable capacitor are coupled to the input and the control nodes of the half circuit respectively. The two ends of the second variable capacitor are coupled to the output and control nodes of the half circuit respectively. The first and second ends of the second switch are coupled to the output and input nodes respectively, and the third end thereof is coupled to the control node and receives a second control signal. The two ends of the variable inductor are coupled to the input and output nodes respectively.

A capacitively-coupled plasma processing apparatus includes: at least one chamber body providing chambers separated from each other; upper electrodes respectively installed in upper spaces within the chambers; lower electrodes respectively installed in lower spaces within the chambers; a high frequency power supply; a transformer including a primary coil electrically connected to the high frequency power supply, and secondary coils each of which coils having a first end and a second end; first condensers respectively connected between each of the first ends of the secondary coils and the upper electrodes; and second condensers respectively connected between each of the second ends of the secondary coils and the lower electrodes. The primary coil extends around a central axis. The secondary coils are configured to be coaxially disposed with respect to the primary coil. A self-inductance of each of the secondary coils is smaller than that of the primary coil.

Guanella topology balun/unun impedance transformer contains cascaded, i.e., series-coupled, coils of different sizes implemented in RF CMOS technology. The cascading of differently-sized coils provides for a large resonance-free operating bandwidth. The shunt inductive loading maximizes low frequency performance.

A coin detection antenna includes a substrate and an air core coil in a track shape including a wiring pattern provided on the substrate, and a width of an air core of the air core coil in a short-side direction is equal to or less than twice a thickness of a smallest coin having a smallest thickness of coins to be detected.

This integrated circuit comprises an inductor formed by at least a first coil and a second coil which are magnetically coupled together. Each of the first and second coils comprises a metal line which extends continuously, in a plane, between a first end and second end, said metal line following a winding path around an axis of the coil parallel to the plane, this metal line comprising for this purpose a succession of sections which each intersect the axis of the coil, and the sections of this succession are electrically connected in series with each other.

It is an object to provide a thin film inductor element using a new type of emergent electromagnetic field, which has a not so high difficulty in selecting materials, and also has a not so high temperature dependency.

A thin film inductor element is characterized by including: a stacked layer film including a magnetic body layer, and a non-magnetic body layer or an antiferromagnetic body layer stacked therein, and a pair of electrodes, and is characterized in that the magnetic body layer, and the non-magnetic body layer or the antiferromagnetic body layer are extended in an arbitrary shape in a direction orthogonal to a stacking direction, and a vertical orientation of the stacking direction is also arbitrary, the magnetic body layer has a substantially uniform magnetization structure, and the pair of electrodes are provided at both ends to which the stacked layer film is extended, and an alternating current or a high frequency current is applied.

An inductor device includes a first inductor, a second inductor, and at least one switch circuit. The second inductor is arranged to enclose the first inductor, and use a topmost layer metal to resist external interference for the first inductor. The at least one switch circuit is coupled to the second inductor, and is arranged to receive at least one control voltage, wherein the at least one control voltage is arranged to adjust conduction degree of the at least one switch circuit.