A broadband switch includes multi-stage electromechanical ganged stage relays. The ganged stage relays provide at least 65 dB of electrical isolation from active broadband input or active broadband output to all non-active broadband inputs. In a further aspect, the ganged stage relays provide at least 100 dB of electrical isolation from 1 kHz to 100 MHz from broadband inputs and broadband output to power inputs.

Disclosed is an authentication reader intended to be installed on a motor vehicle opening element, the reader including a microcontroller, at least one transmitter, at least one matching circuit and a single antenna, called primary antenna, characterized by a working frequency. The matching circuit includes switching element able to switch the matching circuit between a first mode, in which the matching circuit makes it possible to match the primary antenna to a secondary antenna of an authentication device whose resonant frequency is lower than the working frequency, and a second mode, in which the matching circuit makes it possible to match the primary antenna to a secondary antenna of an authentication device whose resonant frequency is higher than the working frequency.

Disclosed is an authentication reader intended to be installed on a motor vehicle opening element, the reader including a microcontroller, at least one transmitter, at least one matching circuit and a single antenna, called primary antenna, characterized by a working frequency. The matching circuit includes switching element able to switch the matching circuit between a first mode, in which the matching circuit makes it possible to match the primary antenna to a secondary antenna of an authentication device whose resonant frequency is lower than the working frequency, and a second mode, in which the matching circuit makes it possible to match the primary antenna to a secondary antenna of an authentication device whose resonant frequency is higher than the working frequency.

A voltage controlled oscillator (VCO) is disclosed to provide reduced phase noise at higher operating frequencies. A buffer-first VCO configured according to an embodiment includes multiple VCO core circuits configured to provide synchronously tuned oscillator signals. Each VCO core circuit is coupled to a summing node through a buffer circuit that generates uncorrelated phase noise such that the summing node provides a summation output of the oscillator signals with reduced phase noise. A multiplexer-less VCO configured according to an embodiment includes multiple buffer-first VCO circuits configured to provide oscillator signals covering a range of frequencies. Each buffer-first VCO circuit is controlled or selected by an enable signal. Buffer circuits are configured to select one of the buffer-first VCO circuits for coupling to a transmission line during a given time period based on the enable signal. The transmission line is terminated in a matched impedance at each end of the line.

A multiport RF switch assembly with integrated impedance tuning capability is described that provides a single RFIC solution to switch between transmit and receive paths in a communication system. Dynamic tuning is integrated into each switch sub-assembly to provide the capability to impedance match antennas or other components connected to the multiport switch. The tuning function at the switch can be used to shape the antenna response to provide better filtering at the switch/RF front-end (RFFE) interface to allow for reduced filtering requirements in the RFFE. Memory is designed into the multiport switch assembly, allowing for a look-up table or other data to reside with the switch and tuning circuit. The resident memory will result in easier integration of the tunable switch assembly into communication systems.

A voltage controlled oscillator (VCO) is disclosed to provide reduced phase noise at higher operating frequencies. A buffer-first VCO configured according to an embodiment includes multiple VCO core circuits configured to provide synchronously tuned oscillator signals. Each VCO core circuit is coupled to a summing node through a buffer circuit that generates uncorrelated phase noise such that the summing node provides a summation output of the oscillator signals with reduced phase noise. A multiplexer-less VCO configured according to an embodiment includes multiple buffer-first VCO circuits configured to provide oscillator signals covering a range of frequencies. Each buffer-first VCO circuit is controlled or selected by an enable signal. Buffer circuits are configured to select one of the buffer-first VCO circuits for coupling to a transmission line during a given time period based on the enable signal. The transmission line is terminated in a matched impedance at each end of the line.

A multiport RF switch assembly with integrated impedance tuning capability is described that provides a single RFIC solution to switch between transmit and receive paths in a communication system. Dynamic tuning is integrated into each switch sub-assembly to provide the capability to impedance match antennas or other components connected to the multiport switch. The tuning function at the switch can be used to shape the antenna response to provide better filtering at the switch/RF front-end (RFFE) interface to allow for reduced filtering requirements in the RFFE. Memory is designed into the multiport switch assembly, allowing for a look-up table or other data to reside with the switch and tuning circuit. The resident memory will result in easier integration of the tunable switch assembly into communication systems.

A system is described for maintaining an inductive-capacitive (LC) network at resonance while the excitation frequency may be varied between a number of discrete frequencies at desired instants controlled by a modulation input, while taking into account component parameter errors due environmental and ageing as well as manufacturing tolerances. Control of the resonance while the excitation frequency changes permits the transmission of frequency modulation (FM) or frequency shift keying (FSK) information through an inductively coupled power transfer system.

A multiport RF switch assembly with integrated impedance tuning capability is described that provides a single RFIC solution to switch between transmit and receive paths in a communication system. Dynamic tuning is integrated into each switch sub-assembly to provide the capability to impedance match antennas or other components connected to the multiport switch. The tuning function at the switch can be used to shape the antenna response to provide better filtering at the switch/RF front-end (RFFE) interface to allow for reduced filtering requirements in the RFFE. Memory is designed into the multiport switch assembly, allowing for a look-up table or other data to reside with the switch and tuning circuit. The resident memory will result in easier integration of the tunable switch assembly into communication systems.

A multiport RF switch assembly with integrated impedance tuning capability is described that provides a single RFIC solution to switch between transmit and receive paths in a communication system. Dynamic tuning is integrated into each switch sub-assembly to provide the capability to impedance match antennas or other components connected to the multiport switch. The tuning function at the switch can be used to shape the antenna response to provide better filtering at the switch/RF front-end (RFFE) interface to allow for reduced filtering requirements in the RFFE. Memory is designed into the multiport switch assembly, allowing for a look-up table or other data to reside with the switch and tuning circuit. The resident memory will result in easier integration of the tunable switch assembly into communication systems.