82results about How to "Low noise performance" patented technology

A heat transport device includes a container having a hollow structure including a fluid channel, at least one thermal-receiver heat exchanger and one thermal-radiator heat exchanger arranged side-by-side on an outer wall of the container along the fluid channel, and driving heat exchangers at respective terminal portions of the container. In this heat transport device, both ends of the fluid channel are closed to prevent intrusion of external air, and a liquid and a gas are sealed in the fluid channel. The driving heat exchangers cause the liquid to oscillate in the container along the internal fluid channel. The heat transport device provides low acoustic noise performance, improved temperature controllability, high heat transportation and heat radiating capacities, and improved heat transfer and fluid flow characteristics.

This invention relates to a self-restructing plasma antenna including a column container, inert gases, a RF excitation antenna, a RF excitation source, a signal coupler, a feeding port and an earth plate characterizing that the column container is filled with inert gases, the source and the antenna are used in exciting and maintaining the plasma, in which, the excitation antenna is set in the inside or outside of the column container, its lead out wire is connected with the RF excitation source, the signal coupler is used to couple the signal to the plasma antenna set out of the container, the lead out wire is connected with the internal conductor of the feeding port and the outer conductor is connected with the earth plate.

An electrical connector includes a connector main body made of an insulating material for attaching an end portion of a pair of single wires untwisted at an end portion of a twisted pair cable; and a shell member to hold the untwisted portion. The shell member includes a base portion made of a conductive material to dispose the connector main body at the front end side and the untwisted portion at the basal end side; a cable holding portion made of a conductive material to hold the single wires at the untwisted portion for positioning the single wires parallel to each other and close or contact to each other; and a cover portion provided on the base portion to have at least the untwisted portion and the cable holding portion between the cover portion and base portion.

The present invention aims to improve the wet performance while securing steering stability and holding down degradations in noise performance to minimum, and for this purpose, a pneumatic tire in which blocks are disposed at intervals at a tread portion thereof is arranged in that concave blocks with stepped concave portions that extend along block side edges, which face circumferential main grooves, and having a depth from a block top surface that corresponds to 20 to 70% of a block height are provided. The concave portions have a length in a tire circumferential direction of 40 to 95% of a length of the block side edges in the tire circumferential direction and a width in a tire axial direction of 2 to 20 mm.

The invention provides an all-optical caching method for realizing an orthogonal mode in a four-wave mixing mode. The all-optical caching method comprises the following steps of: inputting a modulatedoptical signal into a duplicator by adopting a pump; generating idler frequency light according to a frequency formula by means of a first four-wave mixing module; determining the sequence length ofall waveforms entering a cache region in a time domain by means of an input switch; after the signal enter the cache, injecting a pump signal into a recovery unit in a lower branch locking process, meanwhile, guiding signal waves and idler frequency waves to an upper branch, and carrying out phase and polarization adjustment; after upper and lower branches are combined, inputting PSA for signal compensation; and when buffering is not needed any more, activating an output switch and outputting an optical signal, and using a modulator in a pumping recovery branch circuit to adjust the relative phase and the pumping power, so as to realize empty or write-in operation on an optical buffer. According to the all-optical caching method, a duplicator type phase-sensitive amplifier is adopted, so that amplification of lower noise can be realized, multi-wavelength cache time control is realized, and the stability and transmission quality of a transmission system are improved at the same time.

A CMOS differential power amplifier having broadband input matching with Noise and Non-linearity Cancellation. The broadband input match is realized by using two “Diode-Connected” NFETs (i.e., N-type Field Effect Transistors). Resulting noise degradation is reduced by using a noise cancellation structure. By using the same structure the disclosed method and apparatus also achieves non-linearity cancellation.