30results about How to "Strong reception signal" patented technology

Disclosed is a manufacturing method of a transparent antenna. The method comprises the following steps of a, preparing an antenna base material with the transparency not lower than a predetermined transparency; b, growing a graphene film on the antenna base material; c, carving the graphene film through laser to form a preset antenna pattern; d, adhering the antenna base material film sheet to a main base material with the transparency not lower than the predetermined transparency or the case of an electronic product. By directly growing the graphene film on a transparent base material or a base material film sheet and carving out the antenna pattern through the laser, the excellent-performance transparent antenna can be obtained.

The invention relates to a high-temperature high-sensitivity piezoceramic material and a preparation method thereof, which belongs to the field of ceramic composition and preparation. A constitution formula of the high-temperature high-sensitivity piezoceramic material is xPbZrO3+yPbTiO3+zPbNbO3+mSrTiO3+nLaTiO3+awt.percentSiO2+bwt.percentCr2O3+cwt.percentNb2O5+dwt.percentLa2O3, wherein the x is between 0.4 and 0.6; the y is between 0.4 and 0.5; the z is between 0.001 and 0.05; the m is between 0.0 and 0.05; the n is between 0.01 and 0.05; x+y+z+m+n is equal to 1; the a is between 0 and 0.5; the b is between 0 and 0.5; the c is between 0 and 0.5; and the d is between 0 and 0.5. The material is modified and prepared based on the prior piezoceramic process, and main performances of the material comprise: d33 is equal to 500pC/N, epsilon33T/epsilono is equal to 1,800, g33 is equal to 31.4, tg delta is equal to 1.5, Kp is equal to 0.62, Qm is equal to 60, Tc is equal to 352 DEG C, and rhov(200 DEG C) is equal to 7.8*10<8>omega.cm. The material has the characteristics of high service temperature (high up to 200 DEG C), high sensitivity (g33 is equal to 31.4), strong signal receiving, and good stability.

A glass antenna of the present invention includes a window glass: a defogging heater including a plurality of conductive lines arranged on the window glass; a first antenna element and a second antenna element arranged at an upper side relative to the heater on the window glass; and a first feeding point for the first antenna element arranged at a left side of the window glass, and a second feeding point for the second antenna element arranged at a right side of the window glass. The first antenna element and the second antenna element each are capacitively coupled with the heater.

A magnetic resonance device includes a measuring chamber, a high-frequency shield at least partially enclosing the measuring chamber and an antenna arrangement that includes a plurality of antenna elements disposed around the measuring chamber. The antenna elements have at least one component that is active in the manner of an antenna and extends, as viewed from the high-frequency shield, towards an interior of the measuring chamber.

A slim television broadcast receiver employing antennas in which a waveguide is formed by a metallic plate and a copper foil on a printed circuit board, an insulating magnetic element is loaded so as to block one of a pair of aperture planes of the waveguide, the aperture area is enlarged by beveling the other aperture plane, and tuning elements are provided on opposed sides with respect to the center part of the other aperture, which antennas are placed on opposed side ends of the slim television broadcast receiver, thereby performing electronic tuning and phase synthesis diversity reception.

The invention discloses a double-microphone voice noise reduction device. The device comprises a first microphone and a second microphone, wherein the first microphone and the second microphone are located on the same horizontal line, the first microphone is set to be in the 0-degree direction of the mouth, the second microphone is far away from the 180-degree direction of the mouth, and the distance between the first microphone and the second microphone ranges from 1.1cm to 3cm. The invention also discloses a double-microphone voice noise reduction method, which comprises the steps of firstly, receiving and acquiring two paths of voice signals s0 and s1, wherein the sampling rate is integral multiple of the sampling rate of actually processed data; then down-sampling to an actual samplingrate needing to be processed; performing spectral analysis on the down-sampled data, and iteratively calculating a filter coefficient; multiplying the filter by one path of input signal in a frequency domain, and performing inverse Fourier transform and overlapping addition to obtain an output voice signal s2. According to the invention, stable and non-stable voices in a non-target direction canbe effectively filtered to obtain processed clean voices; not only can an efficient noise reduction effect be achieved, but also the noise reduction cost is reduced.

A wireless communication method and protocol for wireless RF transmission of data, e.g. audio data, with low latency. The method involves a fixed part (FP) serving as synchronization master, and one or more portable parts (PP) being synchronization slaves. The FP performs scanning between a set of supported channels within one limited frequency band, such as within an ISM band. Further, the FP performs collecting measures of RF interference level on at least a plurality of the supported channels in response to the scanning, preferably using own interference level measurement and by collecting RSSI data from the PP for the supported channels. In response to these measures of RF interference level, the FP executes a selection algorithm for selecting and re-selecting first and second different frequencies for respective first and second duplex RF bearers from the set of supported channels to select the channels with least RF interference. Finally, the FP transmits, in one frame of such as 1 ms to 3 ms length, the same data packet on both of said first and second duplex RF bearer frequencies to the PP. This provides a roboust and low latency wireless interface suitable for Human Interface Devices and audio devices, e.g. for gaining equipment.

The invention discloses a home television antenna. The home television antenna comprises a signal transmission device, a power supply device, an antenna amplifying device, an antenna fixing enclosureand an antenna main board, wherein the signal transmission device is electrically connected with the antenna amplifying device; the power supply device is electrically connected with the antenna amplifying device; the antenna fixing enclosure is fixed on the antenna main board; an antenna is arranged in the antenna main board and is fixedly connected in the antenna main board by the antenna fixingenclosure; the antenna is electrically connected with the antenna amplifying device by the signal transmission device. According to the home television antenna, by adopting a special antenna structure, line graphs are simplified, and stronger receiving signal and better receiving effect are realized; the defects of the prior art are overcome; by arranging the structure of the antenna amplifying device, the receiving distance can be controlled by a switch.

The invention discloses a multi-lobe high-gain UV (ultraviolet) omnidirectional AM (amplitude modulation) antenna which comprises an insulating plate, a substrate, two V frequency signal radiation units, an AM vibrator winding magnetic rod and an amplifying circuit. The substrate is arranged above the insulating plate, the two V frequency signal radiation units are positioned between the insulating plate and the substrate, four signal radiation portions, a feeder unit and an impedance matching unit are printed on the substrate, the four signal radiation portions are annularly arrayed on the upper surface of the substrate, so that the antenna receives UHF (ultra-high frequency) band signals in a 360-degree direction, the two V frequency signal radiation units are distributed around an insulating layer and used for receiving VHF (very high frequency) band signals, and the AM vibrator winding magnetic rod is arranged on the insulating layer and used for receiving AM and FM (frequency modulation) signals. By the aid of the radiation units for receiving UHF and VHF and the winding magnetic rod for receiving AM and FM, the antenna can receive the UHF, VHF, AM and FM band signals more strongly and stably, signal structure frequency bands are widened, the VHF frequency band receives the signals in an omnidirectional manner through a circular structure, and the UHF frequency band receives the signals in an omnidirectional manner through the four radiation portions.

The invention relates to a Bluetooth wireless receiving device. The Bluetooth wireless receiving device comprises an MCS and code element number storage unit, an MCS switching control unit, a demodulating unit, a decoding unit, a frequency domain equalizing unit, a CP removing unit, a receiving unit, and a Bluetooth recognizing and receiving unit, wherein the output end of the MCS and code element number storage unit is connected with the MCS switching control unit; the output end of the MCS switching control unit is connected with the demodulating unit and the decoding unit respectively; by virtue of a Bluetooth signal, a signal is transmitted to the receiving unit through the Bluetooth recognizing and receiving unit; the output end of the receiving unit is connected with the CP removing unit; the CP removing unit is connected with the demodulating unit through the frequency domain equalizing unit; the demodulating unit is connected with the decoding unit. The Bluetooth wireless receiving device adopting the design provided by the invention is strong in a received signal and good in using effect in the using process.