Abstract: A portable antenna control device includes: a main controller for generating a control signal for adjusting a device provided in an antenna; a modem unit for converting the control signal generated by the main controller into an on-off keying (OOK) signal; a power management unit for supplying direct current power; and an OOK port for synthesizing and outputting the OOK signal converted by the modem unit and the direct current power supplied by the power management unit.

Abstract: An analog-to-digital converter (ADC) comprising successive approximation circuitry, a capacitive analog-to-digital converter (CDAC), and capacitor mismatch measurement circuitry. The successive approximation circuitry is configured to control conversion of an analog signal to a digital value. The CDAC is coupled to the successive approximation circuitry. The CDAC includes a plurality of capacitors. The capacitor mismatch measurement circuitry is coupled to the CDAC. The capacitor mismatch measurement circuitry includes a first oscillator circuit, a second oscillator circuit, and counter circuitry. The first oscillator circuit is configured to oscillate at a frequency determined by a capacitance of one of the capacitors. The second oscillator circuit is configured to generate a predetermined time interval. The counter circuitry is configured to count a number of cycles of oscillation of the first oscillator in the predetermined time interval.

Abstract: Converter circuits and methods herein describe mechanisms for converting a digital input signal to an analog output signal using a series of transmission lines. The circuits and methods described herein convert to analog signal using very little power, due to inter-coupling of wave propagation media.

Abstract: A method for compressing flow data, including: generating multiple line segments according to flow data and a predefined maximum error that are acquired; obtaining a target piecewise linear function according to the multiple line segments, where the target piecewise linear function includes multiple linear functions, and an intersection set of value ranges of independent variables of every two linear functions among the multiple linear functions includes a maximum of one value; and outputting a reference data point according to the target piecewise linear function, where the reference data point includes a point of continuity and a point of discontinuity of the target piecewise linear function. In this way, a maximum error, a target piecewise linear function is further determined according to the multiple line segments, and a point of continuity and a point of discontinuity of the target piecewise linear function are used to represent compressed flow data.

Abstract: Techniques for limiting the output voltage of an amplifier without directly affecting an output current of the amplifier are provided. In an example, an amplifier can include a plurality of amplifier stages configured to receive an input voltage and to provide an output voltage as a function of the input voltage, and a comparator configured to receive a voltage limit and a representation of the output voltage of the amplifier, to adjust current at an input to a first amplifier stage of the plurality of amplifier stages when the output voltage violates the voltage limit, and to clamp the output voltage at an offset from the voltage limit.

Abstract: According to one embodiment, an antenna device includes first and second split ring resonators and a power supply line. The first split ring resonator includes a conductor enclosing a first opening and having a first void separating a part of the conductor. The second split ring resonator is opposed to the first split ring resonator, including a conductor which encloses a second opening and has a second void separating a part of the conductor. The power supply line feeds power to the first or second split ring resonator. The first split ring resonator is not electrically connected to the second split ring resonator. The first void does not overlap with the second void in an opposing direction of the first split ring resonator and the second split ring resonator.

Abstract: A phased array antenna comprising a two dimensional array of lens enhanced radiator units, each radiator unit comprising: a radiator for generating a radio frequency (RF) signal; and a two dimensional phase variable lens group defining an aperture in a transmission path of the RF signal, the lens group comprising a two dimensional array of individually controllable lens elements enabling a varying transmission phase to be applied to the RF signal across the aperture of the lens group. Also, a unit cell of a lens element in a metamaterial sheet, the unit cell comprising a stack of cell layers, each cell layer comprising a volume of nematic liquid crystal with a controllable dielectric value enabling each cell layer to function as tunable resonator.

Abstract: Provided is a method for a magnetic encoder having a magnetic body comprised of a magnetic rubber molded article, comprising a mixing step of mixing and then kneading a nitrile rubber (A), a ferrite magnetic powder (B) and a vulcanizing agent (C) to provide a magnetic rubber composition; and a molding step of molding and vulcanizing the magnetic rubber composition in a mold to which a magnetic field is applied to provide the magnetic rubber molded article, wherein a content of the ferrite magnetic powder (B) is 700 to 1500 parts by mass based on 100 parts by mass of the nitrile rubber (A); and a compressed density of the ferrite magnetic powder (B) is 3.5 g/cm3 or more. According to this method, a magnetic encoder having a magnetic body with high coercivity and residual magnetic flux density can be produced by vulcanizing a magnetic rubber composition having favorable moldability.

Abstract: An object is to reduce power consumption of an analog-digital converter circuit. An analog potential obtained in a sensor or the like is held in a sample-and-hold circuit including a transistor with an extremely low off-state current. In the sample-and-hold circuit, the analog potential is held in a node which is able to hold a charge by turning off the transistor. Then, power supply to a buffer circuit or the like included in the sample-and-hold circuit is stopped to reduce power consumption. In a structure where a potential is held in each node, power consumption can be further reduced when a transistor with an extremely low off-state current is connected to a node holding a potential of a comparator, a successive approximation register, a digital-analog converter circuit, or the like, and power supply to these circuits is stopped.

Abstract: Embodiments of the present invention provide a reflector antenna and a reflector antenna feed. The reflector antenna feed includes a transmit antenna array and a receive antenna array, where the transmit antenna array includes at least two transmit antenna units. The receive antenna array includes at least two receive antenna units. Also, a phase center of the transmit antenna array coincides with that of the receive antenna array, where at least one coupling unit is disposed between at least one group of a transmit antenna unit and a receive antenna unit that are adjacent to each other.

Abstract: A variable filter circuit (10) includes a parallel arm (11) connected between a port (P3) and node (A), a series arm (12) including a resonator (Re_s1) connected in series between a port (P1) and node (A), and a series arm (13) including a resonator (Re_s2) connected in series between a port (P2) and node (A). The parallel arm (11) includes a first inductor (Lp1). The series arms (12, 13) include variable capacitors (Cp_s1, Cp_s2) connected in parallel to the resonators (Re_s1, Re_s2).

Abstract: The present disclosure provides a waveguide transition structure for receiving satellite signals, which can be implemented in a low noise block down-converter. In some embodiments of the present disclosure, the low noise block down-converter includes a feed horn structure having at least a first waveguide extending along a first direction, a housing having at least a second waveguide extending along a second direction and communicating with the first waveguide, and a circuit board positioned within the housing. The second direction is substantially not in parallel to the first direction. The circuit board has a receiving pin configure to receive microwave signals propagating in the second waveguide.

Abstract: Enclosures for radios, parabolic dish antennas, and side lobe shields are provided herein. A dish antenna includes a parabolic circular reflector bounded by a side lobe shield that extends along a longitudinal axis of the dish antenna in a forward direction forming a front cavity, and a sidewall that extends along the longitudinal axis of the dish antenna in a rearward direction forming a rear cavity.

Abstract: A residue generation apparatus for use in continuous-time and hybrid ADCs is proposed. The apparatus includes a quantizer for digitizing an analog input to generate a digital output, and means for applying a first transfer function to the digital output from the quantizer to generate a digital input to a feedforward DAC, based on which the DAC can generate a feedforward path analog output. The apparatus further includes means for applying a second, continuous-time, transfer function to the analog input provided to the quantizer to generate a forward path analog output, and a subtractor for generating a residue signal based on a difference between the forward path analog output and the feedforward path analog output. Proposed apparatus allows selecting a combination of the first and second transfer functions so that, when each is applied in its respective path, the residue signal passed to further stages of an ADC is reduced.

Abstract: An apparatus including an antenna; a first part including a first ground plane portion; a second part including a second ground plane portion; a first electrical connection between the first part and a second part; and a second electrical connection between the first ground plane portion and the second ground plane portion that includes a reactive component.

Abstract: A satellite system can include one or more satellites that orbit the Earth. The one or more satellites may have satellite buses that support antenna arrays. The antenna arrays may include space fed arrays. Each space fed array may have an antenna feed array and an inner array that is coupled to a direct radiating array. The direct radiating array may operate in the same satellite band as the space fed array, or upconversion and downconversion circuitry may be used to communicatively couple a direct radiating array that operates in a different satellite band to the space fed array. The satellites may have peripheral walls with corner fittings that can be selected to provide the satellite bus with particular leg strengths. This can reduce overall mass of the satellites in a payload fairing while accommodating different types of antenna arrays.

Abstract: An antenna capable of being joined to an antenna feed perpendicular to a ground plane includes a monopole extending perpendicularly from the ground plane. The antenna feed is joined to the monopole. An innermost shell is provided about the monopole. The innermost shell is made from a dielectric material having a dielectric tensor with high permittivity in the direction of the monopole axis. An intermediate shell provided outside the innermost shell. The intermediate shell also has dielectric tensor having high impedance in the direction parallel to the monopole axis. An outermost shell is provided having a perimeter approximately equal to the length of the monopole. The outermost shell also has a dielectric tensor with high impedance in the direction of the monopole axis.

Abstract: A device is disclosed that includes a comparator and a configurable heater. The comparator is configured to compare a transmission phase of a light transmitted in a photonic component with a reference phase to generate a phase difference. The configurable heater is disposed with respect to the photonic component and includes a plurality of heater segments, wherein a number of the heater segments in operation is trimmable based on the phase difference.

Abstract: Methods and systems for generating a digital representation of the amplitude and phase of a bandpass signal are disclosed. The methods comprise filtering the bandpass signal with a bandpass filter, generating the real and imaginary parts of the complex analytic signal with a quadrature hybrid, determining the amplitude of the complex analytic signal by adding an even power-law transform of the real and imaginary parts of the complex analytic signal, and determining the phase of the complex analytic signal by comparing the real and imaginary parts of the complex analytic signal to zero and comparing an even power-law transform of the real and imaginary parts of the complex analytic signal to each other. Analog to digital converters and methods of converting complex analytic signals to digital signals are also disclosed.

Abstract: According to one embodiment, an analog-to-digital converter includes a first digital-to-analog converter, a comparator configured to digitally output based on a first clock signal, a clock generator configured to generate the first clock signal from an input clock signal, and a controller configured to control the first digital-to-analog converter. The clock generator sets a cycle of the first clock signal to a first cycle if the input clock signal is at a first logic level, and sets the cycle of the first clock signal to a second cycle shorter than the first cycle if the input clock signal is at a second logic level.