Abstract: A low-reflectivity solid-state switch circuit includes an input port configured to transmit an electronic signal and first and second output ports configured to receive the electronic signal. The switch circuit further includes a first switching element connected between the input port and the first output port, a second switching element connected between the input port and the second output port, a third switching element connected to a first conductive path between the first switching element and the first output port, and a fourth switching element connected to a second conductive path between the second switching element and the second output port. The third and fourth switching elements are utilizable to shunt current reflections from their connected conducted paths when the respective conductive path is configured in an off configuration.

Abstract: An improved quadrature modulator/demodulator (IQMD) may use two-phase quadrature local oscillator (LO) signal generation for generating 0° and 90° LO signals, and an anti-phase combiner/divider (at 0° and 180°) on the RF (radio frequency) port. The IQMD may include mixers (which may be double-balanced passive mixers) that function as downconverters when a signal is incident at their radio frequency (RF) ports, and function as upconverters when signals are incident on their intermediate frequency (IF) ports. Accordingly, the IQMD may function as an I/Q modulator by connecting digital-to-analog converters (DAC) to the differential I and Q ports, and/or it may also function as an I/Q demodulator by connecting analog-to-digital converters (ADC) to the differential I and Q ports.

Abstract: An improved quadrature modulator/demodulator (IQMD) may use two-phase quadrature local oscillator (LO) signal generation for generating 0° and 90° LO signals, and an anti-phase combiner/divider (at 0° and 180°) on the RF (radio frequency) port. The IQMD may include mixers (which may be double-balanced passive mixers) that function as downconverters when a signal is incident at their radio frequency (RF) ports, and function as upconverters when signals are incident on their intermediate frequency (IF) ports. Accordingly, the IQMD may function as an I/Q modulator by connecting digital-to-analog converters (DAC) to the differential I and Q ports, and/or it may also function as an I/Q demodulator by connecting analog-to-digital converters (ADC) to the differential I and Q ports.

Abstract: An improved quadrature modulator/demodulator (IQMD) may use two-phase quadrature local oscillator (LO) signal generation for generating 0° and 90° LO signals, and an anti-phase combiner/divider (at 0° and 180°) on the RF (radio frequency) port. The IQMD may include mixers (which may be double-balanced passive mixers) that function as downconverters when a signal is incident at their radio frequency (RF) ports, and function as upconverters when signals are incident on their intermediate frequency (IF) ports. Accordingly, the IQMD may function as an I/Q modulator by connecting digital-to-analog converters (DAC) to the differential I and Q ports, and/or it may also function as an I/Q demodulator by connecting analog-to-digital converters (ADC) to the differential I and Q ports.

Abstract: An improved quadrature modulator/demodulator (IQMD) may use two-phase quadrature local oscillator (LO) signal generation for generating 0° and 90° LO signals, and an anti-phase combiner/divider (at 0° and 180°) on the RF (radio frequency) port. The IQMD may include mixers (which may be double-balanced passive mixers) that function as downconverters when a signal is incident at their radio frequency (RF) ports, and function as upconverters when signals are incident on their intermediate frequency (IF) ports. Accordingly, the IQMD may function as an I/Q modulator by connecting digital-to-analog converters (DAC) to the differential I and Q ports, and/or it may also function as an I/Q demodulator by connecting analog-to-digital converters (ADC) to the differential I and Q ports.

Abstract: A system to extend an operating bandwidth of a signal generator comprises a signal generator, an output port, a first transmission line extending between the signal generator and the output port, a mixer adapted to receive a first signal from the signal generator, a local oscillator adapted to provide a second signal to the mixer to beat against the first signal, a second transmission line extending from the mixer to transmit a plurality of output signals of the mixer, and one or more channels couplable between the first transmission line and the second transmission line. The one or more channels include a first coupler having a length adapted to couple one or more of the output signals within a band of frequencies from the second transmission line to the channel, a second coupler having a length adapted to couple the one or more of the output signals from the channel to the first transmission line, and a filter arranged between the first coupler and the second coupler.

Abstract: A system to extend an operating bandwidth of a signal generator comprises a signal generator, an output port, a first transmission line extending between the signal generator and the output port, a mixer adapted to receive a first signal from the signal generator, a local oscillator adapted to provide a second signal to the mixer to beat against the first signal, a second transmission line extending from the mixer to transmit a plurality of output signals of the mixer, and one or more channels couplable between the first transmission line and the second transmission line. The one or more channels include a first coupler having a length adapted to couple one or more of the output signals within a band of frequencies from the second transmission line to the channel, a second coupler having a length adapted to couple the one or more of the output signals from the channel to the first transmission line, and a filter arranged between the first coupler and the second coupler.