Abstract: An RF amplifier utilizes first and second main amplifiers in a balanced amplifier configuration with first and second auxiliary amplifiers connected in parallel across the first and second main amplifiers, respectively. The main and the auxiliary amplifiers are biased such that the third-order nonlinearity components in the combined output current are reduced. A common or independent bias control circuit(s) control(s) the DC operating bias of the auxiliary amplifiers and establishes DC operating points on curves representing third-order nonlinear components within the drain current having a positive slope (opposite to the corresponding slope of the main amplifiers). This results in reduction of overall third-order nonlinear components in combined currents at the output. In another embodiment, a phase shift of an input to one auxiliary amplifier is used to provide a peak in minimization at a frequency associated with the phase shift.

Abstract: An RF amplifier utilizes first and second main amplifiers in a balanced amplifier configuration with first and second auxiliary amplifiers connected in parallel across the first and second main amplifiers, respectively. The main and the auxiliary amplifiers are biased such that the third-order nonlinearity components in the combined output current are reduced. A common or independent bias control circuit(s) control(s) the DC operating bias of the auxiliary amplifiers and establishes DC operating points on curves representing third-order nonlinear components within the drain current having a positive slope (opposite to the corresponding slope of the main amplifiers). This results in reduction of overall third-order nonlinear components in combined currents at the output. In another embodiment, a phase shift of an input to one auxiliary amplifier is used to provide a peak in minimization at a frequency associated with the phase shift.

Abstract: A retractable drawer divider includes a toothed plate telescopically arranged in a fixed plate and provided with two rows of first tooth parts arranged at intervals, wherein the toothed plate may be placed in at least a first state and a second state. A switch assembly for transitioning the toothed plate between the first and second state includes a locking block, a movable block, a pull rod and a button. The first state is an adjustable state in which the toothed plate can be freely extended and retracted, and the second state defines a fixed or locked state of the drawer divider. The drawer divider length can be adjusted easily and freely according to the size of the drawer environment, and in the locked state provides a snug fit between the divider and an inner wall of a drawer.

Abstract: An RF amplifier utilizes first and second main amplifiers in a balanced amplifier configuration with first and second auxiliary amplifiers connected in parallel across the first and second main amplifiers, respectively. The main and the auxiliary amplifiers are biased such that the third-order nonlinearity components in the combined output current are reduced. A common or independent bias control circuit(s) control(s) the DC operating bias of the auxiliary amplifiers and establishes DC operating points on curves representing third-order nonlinear components within the drain current having a positive slope (opposite to the corresponding slope of the main amplifiers). This results in reduction of overall third-order nonlinear components in combined currents at the output. In another embodiment, a phase shift of an input to one auxiliary amplifier is used to provide a peak in minimization at a frequency associated with the phase shift.

Abstract: Classification of signals using machine learning and related systems, methods and computer-readable media are disclosed. A signal classification system includes a sentence embedding model network, a convolutional generator network, and a classifier network. The sentence embedding model network is trained to convert a body of sentences correlated to different signal modulation schemes into a latent space. The convolutional generator network is configured to project samples of a measured signal into the latent space. The classifier network is configured to classify the measured signal from the latent space responsive to a projection of the samples of the measured signal into the latent space. A method includes training a sentence embedding model network to convert descriptive sentences to a latent space, the descriptive sentences correlated to different signal modulation schemes. The method also includes training a convolutional generator network to project samples of a measured signal into the latent space.

Abstract: A dipole antenna comprises N dipole elements spaced along a dimension of the antenna, each dipole element including a pair of electrically conductive structures and 2N electronic networks each coupled to a corresponding electrically conductive structure of an associated dipole element to form N pairs of electronic networks wherein each electronic network includes a port. The electrically conductive structures are electrically isolated from one another.

Abstract: A dipole antenna comprises N dipole elements spaced along a dimension of the antenna, each dipole element including a pair of electrically conductive structures and 2N electronic networks each coupled to a corresponding electrically conductive structure of an associated dipole element to form N pairs of electronic networks wherein each electronic network includes a port. The electrically conductive structures are electrically isolated from one another.