Abstract: A wide band directional coupler is disclosed. The coupler includes a main transmission line connected between an input port and an output port; and a coupling transmission line having a first length and connected between a coupling port and an isolation port, wherein the coupling transmission line is coupled to the main transmission line through a coupling capacitive connection and a mutual inductive connection, wherein at least a distance between the main transmission line and the coupling transmission line varies along the first length of the coupling transmission line such that any one of a capacitance value of the capacitive connection and an inductance value of the inductive connection is characterized by a relatively low value, wherein a coupling factor of the wide band directional couple remains substantially constant throughout an operating frequency band of the wide band directional coupler.

Abstract: A wide band directional coupler is disclosed. The coupler includes a main transmission line connected between an input port and an output port; and a coupling transmission line having a first length and connected between a coupling port and an isolation port, wherein the coupling transmission line is coupled to the main transmission line through a coupling capacitive connection and a mutual inductive connection, wherein at least a distance between the main transmission line and the coupling transmission line varies along the first length of the coupling transmission line such that any one of a capacitance value of the capacitive connection and an inductance value of the inductive connection is characterized by a relatively low value, wherein a coupling factor of the wide band directional couple remains substantially constant throughout an operating frequency band of the wide band directional coupler.

Abstract: An apparatus for controlling engagement of a clutch comprises at least one distance sensor adapted to provide a signal proportional to the movement of a gear selector in a gearbox along a path for selecting one gear ratio, a clutch engagement control unit adapted to gradually engage the clutch connected to the gearbox in response to the signal of the distance sensor and a clutch signal control unit adapted to receive the signal from the at least one distance sensor and to provide a corresponding control signal to the clutch engagement control unit. A method for controlling the engagement of a clutch comprises receiving a signal proportional to distance of a gear selection lever from the Neutral zone of a gearbox along at least one gear selection path of the gear selection lever and providing a control signal to a clutch control unit to control the engagement of said clutch in response to said signal proportional to the distance of the gear selection lever from the Neutral zone.

Abstract: System and method that permits fully automated production of RF hybrid devices or chokes comprised of electrical wires and a main body made of ferrite toroids are disclosed. RF chokes produced according to current invention may be used as directional couplers, in-phase splitters, balanced/unbalanced (BALUN) matching devices, radio frequency (RF) transformers etc., and may achieve high repeatability and improved electrical performance without adversely affecting electrical characteristics of the RF hybrid devices.