49results about How to "Improve broadband" patented technology

The invention discloses a synchronization photovoltaic power generating system with a solar azimuth tracking device and a tracking method thereof. The system comprises a local range ZigBee wireless network, a TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) 3G public network and a remote monitoring center. The ZigBee wireless network comprises one or more ZigBee nodes of a photovoltaic power generating subsystem and a ZigBee coordinator of a photovoltaic power generating main system, and the ZigBee coordinator is also used as a ZigBee/TD-SCDMA gateway; working condition data of a power generating system are classified according to the operation and maintenance requirements or uploaded through a TD-SCDMA 3G in real time or temporarily stored in the coordinator to be acquired in an off-line way by an inspector during the inspection; the remote monitoring center sets sunny, cloudy and rainy working modes of the tracking device and the rough and fine tracking accuracy in the sunny mode; astronomy tracking and tracking on generated energy of the photovoltaic power generating system are adopted in the solar azimuth tracking device; and a stepping motor and a step subdividing technology are adopted in the mechanical drive of the solar azimuth tracking device. The tracking device is merged into the photovoltaic power generating system, therefore, the reliability and the tracking accuracy of the system are improved and the operation and maintenance cost is lowered.

A log-periodic dipole array antenna including a dielectric substrate, and antenna elements, symmetrical microstrip lines and baluns disposed on two corresponding surfaces of the substrate is provided. The antenna elements on each surface are connected to one side of the corresponding symmetrical microstrip line, respectively. The width of at least one antenna element on each surface is broadened gradually outwards from the side of the antenna element, which is connected to the corresponding symmetrical microstrip line. In addition, the baluns are connected to the ends of the corresponding symmetrical microstrip lines, respectively. The antenna elements on one surface are in a mirror-image relation to those on the other surfaces. The log-periodic dipole array antenna features increased broadband with a thin and compact-size, better margin in design to meet different bandwidth requirements.

The invention discloses an integrated substrate slot waveguide feed slot coupling metasurface antenna. The integrated substrate slot waveguide feed slot coupling metasurface antenna comprises an antenna radiation structure and an integrated substrate slot waveguide structure, wherein the antenna radiation structure and the integrated substrate slot waveguide structure are sequentially arranged andoverlapped from top to bottom; the integrated substrate slot waveguide structure includes an electromagnetic bandgap structure for shielding electromagnetic radiation energy and a feed structure fortransmitting energy to the antenna radiation structure. The feed structure comprises a second dielectric plate, the upper surface of the second dielectric plate is coated with a first copper-coated layer, and a slot is etched in the middle portion of the first copper-coated layer; and the lower surface of the second dielectric plate is provided with a microstrip feeder. The integrated substrate slot waveguide feed slot coupling metasurface antenna has the characteristics of a low profile, a wide bandwidth, a high gain, easiness in processing and the like, and can be used as a 5G millimeter wave antenna.

An antenna structure and its manufacture method are disclosed. The antenna structure is applied to an electronic device and wirelessly operated at least a frequency band. The antenna structure includes a first antenna body, a second antenna body connected to the first antenna body through a third body. The first antenna body is provided for generating radiations. The second antenna body is connected to the first antenna body through the third body. The second antenna body has a folding portion upwardly extended from a tail portion of the second antenna body to reflect scattered radiations generated by the first antenna body to increase broadband, and at least two beveled edges are formed at a side of the first antenna body to increase peak gain. The antenna structure is a PIFA antenna, and the folding portion is upwardly extended toward the first antenna body, thereby completely reflecting scattered radiations.

The present invention relates to a TD-LTE private network-based water environment monitoring system and method. The TD-LTE private network-based water environment monitoring system is characterized in that an environment monitoring satellite is connected with a TD-LTE base station and a satellite terminal, and the TD-LTE base station is connected with a TD-LTE terminal and a water environment monitoring terminal separately; a water environment parameter detection module of the water environment monitoring terminal is connected with a control module via a signal conditioning module, the control module is connected with a TD-LTE communication module, and the TD-LTE communication module is connected with a TD-LTE terminal of a water environment monitoring center via the TD-LTE base station. The TD-LTE private network-based water environment monitoring system and the TD-LTE private network-based water environment monitoring method of the present invention overcome the disadvantage that the positioning precision is not high enough, and the transmission information amount is influenced by a BeiDou short information protocol, so that the transmitted information amount is very limited. According to the present invention, a broadband wireless network taking the TD-LTE base station as the center and covering a certain range is formed and also can be linked with various communication means organically, so that the TD-LTE private network-based water environment monitoring system and the TD-LTE private network-based water environment monitoring method have the mobile communication technical advantages of high broadband, low time delay, high stability, high speed, etc., at the same time, have the rapid, mobile and good anti-destroy and anti-interference performance, the network intercommunity and the security and secrecy.

The invention belongs to the technical field of photoelectricity, and relates to a broadband tunable high-precision optical fractional Fourier converter and an implementation method thereof. Accordingto the invention, an optical fractional order Fourier converter is constructed by using three paths of frequency shift optical loops with coprime free spectral ranges; based on the principle of frequency shift replication and delay interference of signals, continuous tunable equivalent large-group velocity dispersion is obtained, high-precision fractional Fourier transform of the signals is achieved in an analog domain, orders can be freely tuned, and frequency measurement and chirp rate measurement of broadband microwave signals can be achieved by combining a reconstruction algorithm.

The invention discloses a cloud VPN service center. The cloud VPN service center comprises a VPN management platform, a cloud server, an enterprise gateway and a VPN remote access client, wherein the VPN management platform is in signal connection with the VPN remote access client, the VPN management platform is in signal connection with the cloud server, and the cloud server is in signal connection with the enterprise gateway. The cloud VPN service center improves broadband and stability of a VPN network by utilizing a new technology, and has the advantages that configuration is simple, flow is simplified, and the broadband and stability of the VPN network can be improved by utilizing multiple links.

The invention discloses an antenna which comprises a feed network layer, a radiation layer, and a parasitic layer which is arranged between the feed network layer and the radiation layer. The feed network layer comprises a wiring structure and a plurality of metal points. The radiation layer is provided with a first radiation fin. The first radiation fin is electrically connected with the wiring structure through a feed column. The first radiation fin is electrically connected with a first metal point in the plurality of metal points through a first conductive column. The parasitic layer is connected with a second metal point in the plurality of metal points through a second conductive column. The wiring structure is wave-shaped. The first radiation fin is provided with an opening. The antenna of the invention has advantages of high bandwidth and low profile.

The invention discloses a broadband hybrid structure J-type power amplifier and a design method. The broadband hybrid structure J-type power amplifier comprises a biasing circuit, an input matching circuit, a hybrid structure harmonic control circuit and an output fundamental wave matching circuit. The input end of the hybrid structure harmonic control circuit is connected with the output end of atransistor, an open-circuit branch micro-strip transmission line and a step impedance conversion line are mixed, and a harmonic control mode is realized by selecting a plurality of frequency points.Therefore, second harmonic short circuit of corresponding frequency points and J-type power amplifier characteristics are realized. The output fundamental wave matching circuit is connected with the mixed harmonic control circuit and used for matching a load. By adopting the technical scheme of the invention, the bandwidth of the J-type power amplifier can be expanded while the efficiency is ensured by utilizing a new hybrid structure and a multi-frequency-point implementation mode.

The invention provides a high-efficiency broadband ordered harmonic matching structure and a high-efficiency broadband ordered harmonic control method. The high-efficiency broadband ordered harmonic matching structure comprises a harmonic control circuit and a fundamental wave matching circuit. An output signal of a power amplifier is loaded to a load end through the harmonic control circuit and the fundamental wave matching circuit. The harmonic control circuit comprises N cross-shaped matching structures. Each cross-shaped matching structure forms a lambda/4 microstrip line and is connected in series orderly, until an output end of an Nth cross-shaped matching structure is connected with an input end of the fundamental wave matching circuit. An output end of the fundamental wave matching circuit is connected with the load end. Compared with the prior art, the high-efficiency broadband ordered harmonic matching structure provided by the invention has the advantages that an existing control structure for the harmonic of center frequency is expanded to control for the harmonic of different frequency points, the bandwidth is expanded under the condition of keeping high efficiency of a power amplifier, and the integrated bandwidth of the amplifier is greatly improved.

The invention discloses an integrated Doherty amplifier and a combiner thereof, and the combiner comprises a main parallel inductor, one end of which is connected in parallel with the output end of amain amplifier; a peak parallel inductor of which one end is connected to the output end of the peak amplifier in parallel; a series capacitor which is connected in series between the output end of the main amplifier and the output end of the peak amplifier; the main parallel inductor and the peak parallel inductor are configured to be used for adjusting the output capacitance of the main amplifier and the output capacitance of the peak amplifier respectively and form an impedance converter with the series capacitor. The integrated Doherty amplifier is used at relatively low power, and meanwhile, high broadband, high efficiency and miniaturization of the amplifier are realized.

An embodiment of the invention discloses a method and a device for dispatching resources. According to a source station and a destination station corresponding to a target global link, whether other interference-free global link sets of the target global link exist in a network or not is judged. If other global link sets exist, the source station can send a request to a central coordinator (CCo) for multiplexing interference-free bandwidth resources of the other global links, or after the interference-free global link sets of the target global link between the source station and the destination station are directly acquired through the CCo, the CCo dispatches the target global link between the source station and the destination station to multiplex the bandwidth resources of the global links in the interference-free global link sets, and accordingly, use ratio of the bandwidth resources in a broadband PLC (programmable logic controller) network is increased.

The invention discloses a voltage-controlled resistor circuit which comprises a resistor R1, a resistor R2, a current transmitter U1 and a multiplier M1. The invention aims to solve the problem that the existing adjustable resistor contains a mechanical structure or the resistance value cannot be continuously changed or the adjustable range of the resistance value is narrow. The electrical characteristics of the ports a and b are equivalent to the resistance characteristics, the change of the resistance value is controlled by the voltage uc(t), only four components need to be used, and the device has the advantages of being simple in structure, convenient to implement, free of mechanical parts, capable of continuously changing the resistance value and large in resistance value adjusting range. The voltage-controlled resistor circuit can be widely applied to various circuit design occasions needing the adjustable resistor (especially a voltage-controlled resistor).

The invention discloses a secondary nonlinear magnetic control memristor simulator based on a current transmitter, which comprises an integral operation circuit, a multiplier M1 and a resistor R2, andthe integral operation circuit comprises a current transmitter U1, a resistor R1 and a capacitor C1. The electrical characteristics of the ports a and b of the secondary nonlinear magnetic control memristor simulator are equivalent to the port characteristics of a magnetic control memristor, the input current of the internal integral operation circuit is 0, and circuits such as a voltage followerused for avoiding the load effect do not need to be connected to the input end in series. According to the secondary nonlinear magnetic control memristor simulator, an absolute value operation circuit is not needed, only five circuit components are needed, the structure is simple, implementation is convenient, and the secondary nonlinear magnetic control memristor simulator can be widely appliedto design of various memristor circuits (circuits such as memristor chaos, memristor bridge synapses and memristor neurons).

The invention discloses a patch antenna with broadband and filtering characteristics. The patch antenna comprises a metal bottom plate, a dielectric substrate attached to the metal bottom plate, a first resonance unit arranged on the surface of the dielectric substrate and a second resonance unit coupled with the first resonance unit, a radiation patch located above the dielectric substrate, a feed component inner conductor connected with the first resonance unit and penetrating through the dielectric substrate and the metal bottom plate, and a feed component outer conductor disposed on the surface of the metal bottom plate and in communication with the feed component inner conductor. The patch antenna with the broadband and filtering characteristics provided by the invention overcomes theshortcomings and realities of the narrow bandwidth, low gain and poor filtering characteristics of an existing patch antenna, and satisfies the requirements of the antenna wide frequency band, high gain and excellent filtering characteristic in a wireless communication system.

A S/N enhancer using the magnetostatic wave signal is disclosed. The S/N enhancer comprises a balun coupler for receiving an first signal and dividing two second signals having the same power and the phase difference of 180 degree; a saturation magnetostatic wave filter for receiving one of the two second signals output from the balun coupler, converting that into a magnetostatic wave signal, and oppositely converting the magnetostatic wave signal, wherein the power of the magnetostatic wave signal is saturated if the received second signal has the power of equal to and more than that of a noise signal; a linear magnetostatic wave filter for receiving the other of the two second signals from the balun coupler, converting that into a magnetosatic wave signal, and oppositely converting the magnetostatic wave signal, wherein the received second signal is converted into the magnetostatic wave signal having an energy linear to the power of the input signal; and a power synthesizer for synthesizing the respective signals output from the saturation magnetostatic wave filter and the linear magnetostatic wave filter.

The invention discloses a magnetic medium loaded low-profile high-performance broadband antenna, which comprises an antenna radiation unit, a reflecting plate and a magnetic medium, wherein the reflecting plate is arranged below the antenna radiation unit and is used for reflecting electromagnetic waves radiated by the antenna radiation unit, and the magnetic medium is arranged between the antenna radiation unit and the reflecting plate and is used for inhibiting the interference of the reflected electromagnetic waves. The magnetic medium is arranged between the antenna radiation unit and the reflecting plate to suppress interference of electromagnetic waves reflected by the reflecting plate on the antenna, so that the effect of reducing the profile of the antenna is achieved; moreover, the impedance matching bandwidth, gain and efficiency of the low-profile antenna can be improved by loading the magnetic medium, and the purpose of loading the magnetic medium in part of a specific region to improve the performance of the antenna is achieved in combination with the structural design of the antenna.

A two-unit folding short-circuit monopole MIMO antenna of a broadband loaded circular patch comprises a dielectric substrate, a Y-shaped metal isolator and two antenna units of the same structure arearranged on the upper surface of the dielectric substrate, and two connected rectangular metal patches are arranged on the lower surface of the dielectric substrate. The two rectangular metal patchesare arranged along the two adjacent edges of the dielectric substrate, and the end parts of the two rectangular metal patches are overlapped and connected to form a grounding plate of the antenna; each antenna unit comprises a first vertical radiation arm, a horizontal radiation arm and a second vertical radiation arm which is connected to a rectangular metallized via hole from the other end of the horizontal radiation arm, the second vertical radiation arm is connected with the grounding plate of the antenna through the rectangular metallized via hole, a circular loaded metal patch is arranged on the horizontal radiation arm, and the two antenna units are separated by the Y-shaped metal isolator. According to the invention, the high-efficiency radiation of the antenna is realized, the resonance bandwidth of the antenna is expanded, and the isolation degree between the unit antennas is increased.