59results about How to "Suppress signal interference" patented technology

A compact surface-mounted antenna having a wide frequency band. In the surface-mounted antenna, a first radiation electrode is formed on the left-half region of the upper surface of a base dielectric substrate. A multi-layer dielectric substrate is laminated on the upper surface of the base dielectric substrate to be bonded and fixed thereto. A second radiation electrode is formed on the right-half region of the upper surface of the multi-layer dielectric substrate. The first and second radiation electrodes are not vertically opposed to each other. Opposing edges of the first and second radiation electrodes are oblique lines. A feeding signal of a signal source is supplied to the first radiation electrode by coupling from a feeding connection electrode, and then, is supplied to the second radiation electrode from the first radiation electrode by another coupling between the first and second radiation electrodes. A direction in which the first radiation electrode excites is set to be substantially perpendicular to a direction in which the second radiation electrode excites.

The invention discloses a small-size high-isolation double-frequency MIMO antenna for a WLAN (Wireless Local Area Network), and belongs to the technical field of antennas. A first dielectric plate (1) is covered by two metal grounding plates (11), and the two metal grounding plates (11) are arranged vertically and are connected with each other through an inductor (12). Two surfaces of a second dielectric plate (2) and two surfaces of a third dielectric plate (3) are respectively coated with metal layers, wherein one metal layer is a dipole antenna unit which is arranged symmetrically, and the other metal layer is a rectangular metal belt (25). The antenna can completely cover the working frequency bands (2.4-2.485GHz and 5.15-5.85GHz) of the WLAN, is small in size, is high in isolation, and is good in performance of directed radiation. Moreover, the impact on the antenna from a background installation environment is smaller, and the antenna is suitable for roof-absorbing installation.

The invention discloses a special radiation signal simulation device and an implementation method. The simulation device comprises a restraint condition construction unit, an array weighting coefficient calculating unit, an emission array amplitude control unit, an emission antenna array unit, a battle situation parameter management unit, a radar signal source unit, an up-conversion unit, a receiving array amplitude control unit, a receiving antenna array unit, a down-conversion unit and an intermediate frequency signal processing unit, wherein the restraint condition construction unit, the array weighting coefficient calculating unit, the emission array amplitude control unit and the emission antenna array unit are connected in sequence; the battle situation parameter management unit, the radar signal source unit and the up-conversion unit are connected in sequence; the receiving array amplitude control unit, the receiving antenna array unit, the down-conversion unit and the intermediate frequency signal processing unit are connected in sequence; the array weighting coefficient calculating unit is connected with the receiving array amplitude control unit; the up-conversion unit is connected with the emission antenna array unit; the emission antenna array unit is an emission antenna array consisting of a plurality of emission antenna array elements; the receiving antenna array unit is a receiving antenna array consisting of a plurality of receiving antenna array elements. By adopting the special radiation signal simulation device and the implementation method, nulls can be formed at a plurality of specified angles, a quick calculating process is achieved, and radiation signals with a capability of suppressing echoes in specific directions can be simulated.

The invention discloses a mechanical arm posture robustness control method based on an interference estimator. The mechanical arm robustness control method comprises steps of establishing a mechanical arm dynamic model and performing feedback linearity on the mechanic arm dynamic model to simplify the dynamic model into a disturbed double integration model, setting a double-component posture robustness controller in order to realize mechanical arm posture robustness tracking control, and converting a compensated control signal to a voltage signal to input into an actuator so as to complete posture robustness control of the mechanical arm under a disturbed condition. The double-component posture controller comprises two parts. One part is used for configuring an input of a nominal system in order to guarantee that a closed loop system can track reference signals and the other part is used for configuring an interference estimator for performing real-time estimation on model uncertainty and external disturbance and then performing compensation on a control signal. The mechanical arm robustness control method based on the interference estimator can effectively remove or inhibit uncertainty or an interference signal in a kinematic model in order to realize high accuracy tracking on a mechanical arm posture expectation reference signal, and is strong in interference resistance, clear in controlling parameters, less in calculation and strong in implementation.

A wave-potential detector and a wave-potential radiator are provided that detect and radiate wave-potential signals having longitudinally polarized A vectors, respectively. Wave-potential receivers and transmitters incorporating the wave-potential detector and wave-potential radiator, respectively, are also provided. The wave-potential detector includes a biased plasma device, having at least a portion of its bias current that is parallel to the direction of propagation of a wave-potential signal having a longitudinally polarized A vector. Both omnidirectional and directive wave-potential radiators are provided.

A wideband interference suppression system comprises at least one signal conditioning device receiving at least one input signal having a signal of interest portion and an interference signal portion, wherein the at least one signal conditioning device is adapted to provide selective, independent, and variable control of one of a phase, a time delay, an amplitude, a radio frequency signal division, and a radio frequency signal summation of the at least one input signal to produce a modified signal. A tunable cross correlator receives a signal representative of the modified signal and is adapted to estimate one of an amplitude, a time delay and a phase delay parameter of the interference signal portion and to generate a control logic signal therefrom, wherein the control logic signal is received by the at least one signal conditioning device for independently and selectively activating and adjusting the various components thereof to suppress the interference signal portion.

Power supplier is in use for restraining signal interference generated in electronic equipment caused by fluctuant earth current. The power supplier includes a transformer, a first side circuit, second side circuit, and grounded conductor. Through cascaded a capacitor and an inductor, the method connects the first side circuit and the second side circuit to grounded conductor. Added capacitor can filter out noise and interference in DC and low frequencies components as well as help to maintain representation of lowered electromagnetic interference. Added inductor is in use for getting rid of noise in high frequency and interference. Most part of noise and interference signal is not possible to pass through conduction route formed. The result of the grounded method is that interfere degree is reduced greatly.

Provided is a wireless battery control system, a method and a battery pack. The system includes a master, and a plurality of slaves sequentially positioned at different distances from the master. The master wirelessly transmit a preparation signal when entering an ID assignment mode. Each slave wirelessly transmits Received Signal Strength Indicator (RSSI) of the preparation signal to the master when wirelessly receiving the preparation signal from the master or other slave during operation in a standby mode. The master wirelessly transmits an ID associated with the operation count to a slave having wirelessly transmitted a maximum RSSI among the RSSIs of the preparation signal, and increases the operation count by 1.

The invention discloses a flexible anti-aging shielding twisted pair cable and a preparation method thereof. The cable is characterized in that four twisted-pair wire cores and a cross-shaped fillingcore material are twisted together to form a cable core, the exterior of the cable core is coated with a fluororesin wrapping tape layer, an aluminum-plastic composite tape wrapping layer, a copper wire shielding winding layer and a silane grafted crosslinked high-density polyethylene insulating layer, the pair-twisted wire core is formed by pair twisting of two insulating wire cores, each insulating wire core comprises an inner conductor and a silane grafted crosslinked low-density polyethylene insulating layer, a nickel copper damage prevention coating and a zinc oxide barrier layer are sequentially sprayed outside the inner conductor and the copper wire shielding winding layer, the cross-shaped filling core material comprises a cross-shaped resin matrix and an aluminum foil layer, an aluminum-plastic composite belt wrapping layer is of an aluminum-plastic composite belt gap wrapping structure, and the aluminum-plastic composite belt comprises an aluminum foil belt outer layer and aPET resin belt inner layer. The cable is advantaged in that the cable effectively suppresses signal interference caused by crosstalk between the pair-twisted wire cores, can effectively suppress a copper damage phenomenon of an insulating layer, and has better mechanical strength, flexibility and electrical characteristics.