Abstract:
A millimeter wave (MMW) circuitry includes a phase modulation circuitry, a plurality of amplifier multiplier chain circuitries and a power combiner circuitry. The phase modulation circuitry is configured to receive input data and a plurality of divided input signals and to provide as output a plurality of phase modulation circuitry output signals. Each phase modulation circuitry output signal corresponds to a respective divided input signal. At least one phase modulation circuitry output signal has a nonzero phase relative to the divided input signals that is related to the input data. Each amplifier multiplier chain circuitry is configured to amplify and frequency multiply and phase multiply the respective phase modulation circuitry output signal to yield a respective power combiner input signal. The power combiner circuitry is configured to sum a plurality of power combiner input signals to yield an output signal. A modulation of the output signal is related to the input data.
Abstract:
An apparatus (100; 400) for varying amplitude and phase of signals along at least one signal path (I) is disclosed. The apparatus comprises: an input (101) for receiving an input signal; an output (102) for providing an output signal; a splitter (10) configured to split the input signal into a plurality of phase shifted signals; a plurality of attenuators (20, 200; 500) controllable by corresponding control signals and configured to attenuate each of the plurality of phase shifted signals; and an adder (30) configured to add the attenuated signals and to provide the added signals as the output signal.
Abstract:
In a C02 gas discharge laser energized by a radio frequency (RF) power source a transformer (20) having selectively variable output impedance is used to match output impedance of the power source to the impedance of discharge electrodes of the laser. A similar transformer (40) can be used to impose a selective variable phase -shift on the RF power from the source. The variable impedance transformer can also be used for impedance matching between amplifier stages in the power source. The transformer comprises first (28, 46) and second (32, 48) transmission - line sections connected in series between and the load. Each of the first and second transmission - line sections having an electrical length equal to or less than about one- twelfth of a wavelength at the source- frequency. A selectively variable electrical component (Cv, Lv) is connected to the node between the first and second transmission - line sections to optimize the transfer of RF- power between the source and the load.
Abstract:
A method and device are described for generating two output signals (I; Q) each substantially identical to a square-wave input signal (A) from a local oscillator (2), wherein the first output signal (I) may have a certain time shift with respect to the input signal (A), and wherein the second output signal (Q) is shifted over T1/4 [mod T1] with respect to the first output signal (I), T1 being the period of the input signal (A). To generate the first output signal (I), Fourier components (S1((1), S3((3), S5((5), S7((7), S9((9), S11((11) etc) of the input signal are combined. To generate the second output signal (Q), Fourier components (S1((1), S5((5), S9((9) etc) of the input signal are phase shifted over +90 DEG while Fourier components (S3((3), S7((7), S11((11) etc) of the input signal are phase shifted over -90 DEG , and the thus shifted Fourier components of the input signal are combined.
Abstract:
An apparatus is disclosed for phase-shifting signals. In example implementations, the apparatus includes a phase shifter. The phase shifter includes a first port, a second port, a vector modulator coupled to the first port, and a signal phase generator. The signal phase generator includes multiple amplifiers coupled between the vector modulator and the second port. The signal phase generator also includes multiple capacitors that couple the multiple amplifiers together to form a loop. Each respective capacitor of the multiple capacitors is coupled between a respective pair of consecutive amplifiers of the multiple amplifiers to form the loop.