34results about How to "Electrical properties are not affected" patented technology

The panel antenna array of a kind of Ka frequency band of the present invention comprises: the waveguide power distribution network of the first layer, the waveguide power distribution network of the second layer, horn radiator: wherein the waveguide power distribution network of the first layer and the waveguide power distribution network of the second layer are composed of multiple A waveguide E-plane T-shaped structure is cascaded; the number of horn radiators corresponds to the number of waveguide E-plane T-shaped structures; each waveguide E-plane T-shaped structure has two output terminals, and the horn radiator has two Input end; the two waveguide input ends of the horn radiator are respectively connected to the output ports of the waveguide E-plane T-shaped structure in the first-layer waveguide power distribution network and the second-layer waveguide power distribution network. The antenna array of the invention has the characteristics of high efficiency, low profile, high gain, narrow beam, easy processing, spanning a wide frequency band and the like.

The invention relates to a damping / heat insulation structure and its preparation method and application, belonging to the technical field of protection of electronic components, in particular to a preparation method of a damping / heat insulation composite functional structure for protecting core components. The damping / insulation structure is used to protect the core components, and the structure includes a polyurethane damping layer, a restraint shell, a heat insulation layer, an outer shell and a heat shield from the inside to the outside. The preparation method includes the synthesis and potting molding of the damping layer material, the processing and molding of the heat insulation tile structure, the preparation of the constrained shell and the shell, the assembly, connection and sealing of the multilayer structure, and the preparation of the heat-resistant coating. The present invention realizes the normal operation of the core components in the environment of short-term high temperature or instantaneous severe shock and vibration through the superposition of multi-layer structures and the sealed connection between the layers. Strong vibration and shock capability.

The invention provides a low-delay temperature compensation biasing circuit for time division duplexing mode, comprising: switch tube; potentiometer, one end connected with output end of the switch tube, voltage dividing output end passing through series-connected resistor and filter decoupling circuit and acting as output bias voltage, and another end earthed through temperature compensation diodes; the temperature compensation diodes comprise series-connected first and second diodes; the input voltage is inputted into a voltage stabilizing tube and then outputted to the switch tube, the earth end of the voltage stabilizing tube is connected in between the first and second diodes; a negative feedback amplifier is connected in series between the series-connected resistor and filter decoupling circuit. And it compensates bias voltage of the amplifier, makes the static current of the amplifier keep constant and electric performance not influenced.

The invention discloses a radius tip electrode and a spherical capacitance return difference type liquid level switch with the radius tip electrode, and relates to the technical field of conductive liquid level detection. The problems that an existing liquid level switch is low in precision, high in foam floating ball water absorption rate and poor in epoxy resin insulating and pressure resistant property are solved. According to the radius tip electrode, one end of a binding post makes contact with and is connected with the outer surface of a metal spherical electrode, an insulating layer wraps the outer surfaces of the metal spherical electrode and the binding post, the insulating layer seals the metal spherical electrode and the binding post, and the other end of the binding post is located outside the insulating layer to serve as the wiring end of the radius tip electrode. According to the spherical capacitance return difference type liquid level switch, the wiring end of the radius tip electrode is connected with the measurement signal input end of a measuring circuit, and the wiring end of a liquid electrode is connected with the measurement signal input end of the measuring circuit. The radius tip electrode and the spherical capacitance return difference type liquid level switch are suitable for conductive liquid level detection.

The invention discloses an aluminum-plastic film for improving the drop resistance performance of a lithium battery, a preparation method thereof, and a corresponding lithium battery. The aluminum-plastic film includes an aluminum-plastic film substrate and a polymer layer, the main material of the polymer layer is polymethacrylate compound, and the polymer layer is used to insulate the aluminum-plastic film substrate and the electric core. The polymethacrylate compound material is located on the inner surface of the aluminum-plastic film to form a stable protective layer. It has good thermal stability, hardness and rigidity at the same time. On the basis of ensuring that the electrical performance of the lithium battery is not affected , when the lithium battery is impacted by heavy objects, dropped from a low height, etc., it can play a better buffer and protection role, effectively improving the safety performance of the lithium battery.