Abstract: A method for determining at least one physical parameter of a system comprising at least two reflection objects is presented, comprising: producing a transmission signal comprising at least one modulated electromagnetic or acoustic wave; receiving a first reception signal that is based on the transmission signal reflected by a first reflection object; receiving a second reception signal that is based on the transmission signal reflected by a second reflection object; receiving a third or further reception signal(s) that is/are based on the transmission signal reflected by a first or second or further reflection object(s); ascertaining the at least one physical parameter of the system on the basis of the first reception signal and further reception signals; ascertaining unknown distances between reflection objects or material properties, composition or nature of the media between the reflection objects of the system on the basis of the first reception signal and further reception signals.

Abstract: A method for determining at least one physical parameter of a system comprising at least two reflection objects is presented, comprising: producing a transmission signal comprising at least one modulated electromagnetic or acoustic wave; receiving a first reception signal that is based on the transmission signal reflected by a first reflection object; receiving a second reception signal that is based on the transmission signal reflected by a second reflection object; receiving a third or further reception signal(s) that is/are based on the transmission signal reflected by a first or second or further reflection object(s); ascertaining the at least one physical parameter of the system on the basis of the first reception signal and further reception signals; ascertaining unknown distances between reflection objects or material properties, composition or nature of the media between the reflection objects of the system on the basis of the first reception signal and further reception signals.

Abstract: An oscillator with adjustable oscillation frequency includes an active device showing a negative input resistance at a terminal, an oscillator circuit coupled to the terminal of the active device showing the negative input resistance, and an element with adjustable ohmic resistance by which the oscillation frequency of the oscillator is adjustable.

Abstract: An oscillator with adjustable oscillation frequency includes an active device showing a negative input resistance at a terminal, an oscillator circuit coupled to the terminal of the active device showing the negative input resistance, and an element with adjustable ohmic resistance by which the oscillation frequency of the oscillator is adjustable.

Abstract: The present invention relates to an integrated transceiver structure 1; 20, comprising at least one antenna terminal 2a-2d, a mixer 4 adapted to down-convert signals received via said at least one antenna terminal 2a-2d and to up-convert signals to be transmitted via said antenna terminal 2a-2d, a receiving path 5 adapted to guide signals received via said at least one antenna terminal 2a-2d to said mixer 4, a transmitting path 16 adapted to guide signals to be transmitted from said mixer 4 to said at least one antenna terminal 2a-2d, a first switch 7 adapted to selectively connect said at least one antenna terminal 2a-2d to said receiving path 5 or said transmitting path 16, and a second switch 8 adapted to selectively connect said receiving path 5 or said transmitting path 6 to said mixer 4. The transceiver structure 1; 20 of the invention is advantageously implemented on a single chip and is preferably suitable for millimeter wave wireless applications.