43results about How to "Small insertion loss" patented technology

The embodiment of the utility model provides a power divider with a filtering function and a power supply. The power divider comprises a first power branch circuit, a second power branch circuit, a first series resonance circuit and a second series resonance circuit, the first power branch circuit is connected with the first series resonance circuit, the second power branch circuit is connected with the second series resonance circuit, and second harmonics of the first power branch circuit are suppressed through the first series resonance circuit. The second series resonance circuit suppresses the second harmonic of the second power branch, so that the power divider has a filtering function, and is simple in structure and very small in insertion loss.

The invention provides a miniaturized double-antenna navigation signal processing board card. Comprising a first radio frequency signal processing module, a second radio frequency signal processing module, a first four-channel navigation module, a first navigation signal processing module, a second four-channel navigation module, a second navigation signal processing module, an external communication interface, a first clock module, a second clock module, a first power supply module and a second power supply module. According to the invention, independent processing of two paths of radio frequency input signals is realized, one path with higher intensity can be independently selected, weakening or interruption of a navigation signal caused by shielding of a certain antenna is effectively dealt with, and the reliability of the navigation signal is improved; according to the invention, navigation signal processing of multiple frequency points of 1.2 GHz, 1.5 GHz and the like under Beidou, GPS, GLONASS and GALILEO navigation systems is realized, and the design is also suitable for receiving navigation signals of multiple frequency points of 1.6 GHz and the like by selecting the models of the first surface acoustic wave filter, the second surface acoustic wave filter and the third surface acoustic wave filter in the radio frequency signal processing module.

The invention provides a polarization insensitive 2 * 2 Mach-Zehnder optical switch based on a silicon nitride waveguide device. The silicon nitride waveguide layer comprises two optical input waveguides, two 2 * 2 bent waveguide type 3dB directional couplers, two symmetric Mach-Zehnder interference (MZI) arms and two optical output waveguides; two light input waveguides are respectively coupled with two input ports of a first 2 * 2 3dB directional coupler, through two paths of symmetrical MZI arms, a straight waveguide of one MZI arm is attached with a thermode to carry out optical signal phase modulation, output light of the two paths of MZI arms is input to a second 2 * 2 3dB directional coupler, so that the output light of the two paths of MZI arms is combined and interfered, and the output light of the two paths of MZI arms is output to the second 2 * 2 3dB directional coupler. And two paths of output waveguides are respectively led out. Based on the silicon nitride square waveguide and the 2 * 2 bent waveguide type 3dB directional coupler, the directional coupler has the advantages of being insensitive to polarization, large in bandwidth, low in insertion loss, high in extinction ratio and the like.

The invention relates to a transition carrier structure for improving the packaging bandwidth of a directly modulated laser chip. The transition carrier structure comprises a first transition carrier transmission structure, a second transition carrier transmission structure and a gold bonding wire. The first transition transmission carrier structure comprises a first ground electrode, a first signal transmission line and a first ground accompanying hole, and the second transition carrier structure comprises a second ground electrode, a second signal transmission line and a second ground accompanying hole. The first transition carrier structure and the second transition carrier structure are connected through gold bonding wires. The transition carrier packaging structure provided by the invention can be well applied to packaging of a laser chip, compensation transition area welding and electric parasitic parameters introduced by gold wire bonding, and reduction of loss generated in a signal transmission process, so that the packaging bandwidth of the laser chip is improved.

The invention relates to a high-power microwave amplitude limiting protection circuit with high power capacity, and belongs to the field of strong electromagnetic pulse protection. The three-level PIN pair transistor amplitude limiting circuit and the eight-order hairpin type microstrip filter circuit are carried on the dielectric substrate, the first blocking capacitor is connected between the input end of the amplitude limiting protection circuit and the three-level PIN pair transistor amplitude limiting circuit, and the second blocking capacitor is connected between the three-level PIN pair transistor amplitude limiting circuit and the eight-order hairpin type microstrip filter circuit. The output end of the amplitude limiting protection circuit is connected with the eight-order hairpin type microstrip filter circuit. The invention has the advantages of large power capacity, small peak leakage, small starting limit level and low amplitude limiting level, can effectively suppress interference signals coupled into the receiving end of the wireless communication equipment by high-power microwaves, and improves the anti-interference capability of the wireless communication equipment under the radiation of the high-power microwaves.

The invention relates to the technical field of surface acoustic wave filters, and discloses a surface acoustic wave broadband band-pass filter, which comprises an input port, an output port, and a first series resonator, a second series resonator, a third series resonator and a fourth series resonator which form a series path between the input port and the output port, adjacent nodes of the input port, the first series resonator, the second series resonator, the third series resonator, the fourth series resonator and the output port are sequentially connected with a first parallel resonator, a second parallel resonator, a third parallel resonator, a fourth parallel resonator and a fifth parallel resonator which are grounded in parallel. According to the invention, the area of each single resonator connected in parallel can be reduced, the overall size of the filter is reduced, and the influence of the resonators on the passband is small due to the parallel connection relation, so that the insertion loss of the passband is low.

The present invention provides a microstrip bandpass filter, comprising a ceramic substrate, a fifth-order resonator, a first feeder interface and a second feeder interface, each resonator is composed of a microstrip line, and the fifth-order resonator comprises a first resonator, a second resonator, a third resonator, a fourth resonator and a fifth resonator arranged in sequence along the length direction of the ceramic substrate, the first resonator, the second resonator, the third resonator and the fourth resonator are all comb-shaped structures, and the third resonator is composed of a half-wavelength U-shaped microstrip line. By making the third resonator in the middle composed of a half-wavelength U-shaped microstrip line, the influence of the parasitic inductance in the through hole on the microstrip line filter is reduced, thereby improving the effect of the filter's low-frequency upward warping and high-frequency downward warping, so that the low-frequency rectangular coefficient of the stopband is improved, and the fluctuation in the passband and the insertion loss at the high frequency are reduced. At the same time, the remaining four resonators are in a comb-shaped structure, and the structure is more compact, so as to reduce the volume of the filter.

The invention discloses an ultra-wideband low-profile extensible DBF array antenna and an implementation method thereof. The array antenna comprises a 4 * 4 array antenna module; the radio frequency front end module is connected with the array antenna module; the radio frequency front-end module comprises four groups of integrated packaging modules, and each group of integrated packaging modules is connected with four array antennas; the integrated packaging module comprises an amplitude-phase multifunctional chip, an up-down conversion chip, an ADC / DA chip, a PA / LNA and a switch chip. And the multilayer printed circuit is connected with the radio frequency front-end module. According to the invention, a mounting mode of grid array packaging is adopted, vertical interconnection between the antenna and the T / R assembly is realized, and the antenna has the advantages of fast assembling speed, low cost and strong expansibility. Meanwhile, the design significantly reduces the size of the antenna, reduces the manufacturing cost, and greatly reduces the insertion loss in signal transmission. In addition, an extensible digital interface is adopted, design and extension of a digital processing multilayer board are facilitated, and adaptability and flexibility of the system are further improved.

The invention discloses a high-frequency low-insertion-loss strong-suppression waveguide filter which comprises an I / O port, an electric coupling window, a square groove window and a zero point window, and far-end harmonic waves of the filter are optimal by adjusting the height of a resonant cavity. According to the high-frequency low-insertion-loss strong-suppression waveguide filter, the high integration level is achieved through the low-temperature co-fired ceramic (LTCC) three-dimensional integration technology, and the high-frequency low-insertion-loss strong-suppression waveguide filter can be applied to 7GHz communication.

The invention discloses a phased-array antenna scanning device with a constant wave beam, which adopts radiation assemblies in a one-dimensional linear array form to radiate or receive radio-frequency signals, active TR assemblies are in one-to-one correspondence with the radiation assemblies, receive excitation signals sent by a radio-frequency network, perform phase shift amplification and then send the excitation signals to the radiation assemblies, and the active TR assemblies are in one-to-one correspondence with the radiation assemblies. Or receiving a radio frequency signal sent by the radiation assembly, performing phase shift and low-noise amplification, and then sending the radio frequency signal to the radio frequency network for combination; a power supply control module receives a control instruction transmitted by an upper computer, wakes up a corresponding TR assembly, calls an amplitude phase compensation value of a wakened active TR channel, and superposes a scanning phase compensation code calculated in real time and an amplitude windowing to realize electric scanning of a constant wave beam.

The utility model relates to the converter technical field, and specifically discloses a DP revolution female adapter comprising a DP female joint structure and a DP male joint structure, the DP female joint structure and the DP male joint structure are connected through a wire rod, the DP female joint structure comprises a female joint housing, a female joint plug is fixed on the surface of one side of the female joint housing in an embedded manner, and the DP male joint structure is connected with the DP male joint structure through a wire rod. The other side of the female head shell is connected with a wire rod in a penetrating mode, and a PCBA board is fixedly installed in the female head shell. According to the device, the PCBA board is arranged in the female head shell, the PS4863 chip is arranged on the surface of the PCBA board, and the PCBA board is connected with the female head plug, so that display card signals can be restored and enhanced through the PS4863 chip in the conversion process between the male head and the female head, the insertion loss of the adapter is effectively reduced, the display resolution is improved, the situation that a screen is blurred or cannot be displayed is avoided, and the display quality is improved. The display effect after equipment connection is improved, and the requirement of a user for high-definition display is met.

The invention provides a V-frequency-band satellite-borne waveguide rotary joint. A mode converter of the rotary joint comprises an input interface; the first transition section comprises a tuning boss, a power dividing structure and a matching structure, the tuning boss is of a stepped structure, the power dividing structure comprises a power dividing plane, a first power dividing wing and a second power dividing wing, the first power dividing wing and the second power dividing wing extend towards the two sides from the power dividing plane and are connected to the matching structure after being bent downwards, and the matching structure is a strip-shaped cube; the transmission circular waveguide is connected with the matching structure, the first power dividing wing and the second power dividing wing, and the extension direction of the matching structure is perpendicular to the extension direction of the transmission circular waveguide; the second transition section is provided with a structure symmetrical to the first transition section; and the output interface has a structure symmetrical to that of the input interface. According to the waveguide rotary joint, the problem that the radial size of the waveguide rotary joint is too large is solved through the downward bending power division structure.

The utility model provides a carrier aggregation circuit and an intelligent terminal, and the circuit comprises an antenna module which is used for receiving a plurality of frequency band signals; the first resonance circuit module is used for passing a preset frequency band signal corresponding to the first resonance circuit module; the first end of the second resonance circuit module is directly connected with the first end of the first resonance circuit module and is connected to the antenna module; the second resonance circuit module is used for passing through a preset frequency band signal corresponding to the second resonance circuit module; and the signal receiving and transmitting module is connected with the second end of the first resonance circuit module and the second end of the second resonance circuit module, and the signal receiving and transmitting module is used for demodulating the multiple frequency band signals. The circuit is used for achieving the effect of reducing the circuit cost.

The invention discloses an optical fiber beam expanding connector which comprises a male head structure and a female head structure, and the male head structure and the female head structure are fixed in an inserted mode. A first collimator and a first glass window embedded in the male head structure are arranged in the male head structure, the first glass window is opposite to the first collimator, and the first glass window seals the first collimator in the male head structure; a second collimator and a second glass window are correspondingly arranged in the female head structure, and when the male head structure and the female head structure are connected, the optical axis of the first collimator is aligned with the optical axis of the second collimator. According to the scheme, the beam expanding connector is provided with the glass window I and the glass window II, so that the collimator I and the collimator II are protected, and the beam expanding connector is convenient to clean. The male head structure and the female head structure are fixed in an inserted mode, and rapid insertion and extraction butt joint can be achieved. The fully-closed structure can effectively isolate dust particles and water vapor energy substances in the external environment, and the structure is more stable.

The utility model relates to the technical field of laser phase control, and discloses an optical fiber tensioner based on piezoelectric ceramic driving, which comprises a base, and one side of the upper surface of the base is provided with an opening through groove; the optical fiber is wound on the outer side of the base and is used for inputting and outputting laser; the piezoelectric ceramic is arranged in the base through a limiting groove, the limiting groove is formed in the open through groove, and the piezoelectric ceramic is used for generating deformation displacement; and the extension spring is arranged in the open through groove, the extension spring is parallel to the deformation direction of the piezoelectric ceramic, and the extension spring is used for improving the elastic recovery capability of the base.

The application discloses an S-band reflective phase shifter based on a cross-coupling line coupler, and belongs to the fields of wireless communication and digital signal processing. The reflective phase shifter is designed based on the cross-coupling line coupler, has the advantages of small size, low insertion loss and wide bandwidth compared with existing branch line couplers and Langer couplers, can replace the digital phase shifter used by a traditional phased array antenna, and solves the problems of high cost and high power consumption of the traditional phased array antenna. In addition, the reflective phase shifter can be integrated on a PCB, has the advantages of easy processing, low cost and small size, is easy to be integrated with a planar printed phased array antenna, and realizes the miniaturization and low cost of the phased array antenna.

The utility model provides a low noise amplifier with a high-performance bypass mode. The low noise amplifier comprises a matching circuit; a low noise amplifier circuit; the bypass circuit is connected with the low-noise amplification circuit in parallel; the control circuit is configured to control the low-noise amplifier to be switched between the low-noise amplification circuit and the bypass circuit; the circuit is characterized in that the bypass circuit comprises a T-shaped structure formed by transistors.

The application relates to a microstrip coupler, a circuit board and a communication device. The microstrip coupler comprises a first ground layer, a first dielectric layer, a second ground layer, a coupling line, a second dielectric layer, a third ground layer and a signal line. The first projection of the coupling line on the third ground layer in the direction perpendicular to the third ground layer is completely non-overlapped with the second hollow area, and the second projection of the signal line on the second ground layer in the direction perpendicular to the second ground layer is completely non-overlapped with the first hollow area. Thus, a cavity is not needed on the signal line as in the related art, so that the product volume of the microstrip coupler can be reduced, miniaturization design is realized, the line length of the output end and the input end of the signal line can be reduced, the insertion loss is reduced, and the output efficiency of the power amplifier is improved; the coupling line and other devices located on both sides of the signal line do not interfere with each other, so that the signal can be normally and stably transmitted; in addition, the product area is reduced, which is beneficial to the arrangement of other devices.

The utility model relates to an antenna device and electronic equipment, the antenna device comprises at least two antenna radiators, a first selection switch, a second selection switch, a third selection switch and a radio frequency processing module, the second selection switch comprises a first receiving and transmitting end and a plurality of second receiving and transmitting ends, the second selection switch is used for selectively conducting the first transceiving end and each second transceiving end; the third selection switch comprises a third transceiving end and a plurality of fourth transceiving ends, and the third selection switch is used for selectively conducting the third transceiving end and the fourth transceiving ends; the at least two antenna radiators, the first receiving and transmitting end and the second receiving and transmitting end are all connected with the first selection switch, and the first selection switch is used for selectively conducting each antenna radiator with the first receiving and transmitting end or the second receiving and transmitting end; and the plurality of second receiving and transmitting ends and the plurality of fourth receiving and transmitting ends are connected with the radio frequency processing module. Therefore, the insertion loss is effectively reduced, the debugging difficulty of the antenna device can be effectively reduced, and the signal strength of the whole machine is improved.

This application provides an integrated passive filter circuit, including two first filter units, two second filter units, and a third filter unit. Each filter unit includes a main path and a grounding element connected to the main path. The two second filter units are symmetrical with respect to the third filter unit. The two first filter units are symmetrical with respect to the two second and third filter units. The end of the main path of the first filter unit serves as the port of the integrated passive filter circuit. The third filter unit includes two parallel and different grounding elements. The solution provided in this application employs a semi-symmetrical structure design. The symmetrical structure on both sides effectively improves the consistency at both ends of the filter and simplifies the adjustment of the reflection characteristics on both sides of the device. The asymmetrical structure in the middle improves out-of-band rejection on both sides, reduces the number of devices, and lowers device insertion loss.

The invention relates to a radio frequency system and electronic equipment. A first transmitting circuit in the radio frequency system is used for supporting transmitting transmission of satellite signals, a first receiving circuit is used for supporting low-noise amplification of the satellite signals, frequency ranges based on cellular signals and the satellite signals are at least partially overlapped, and at least one of a transmitting link and a receiving link of a transmitting and receiving circuit can be multiplexed based on frequency band overlapping. According to the invention, the antenna sharing of a satellite communication system and a cellular mobile communication system can be realized by using the gating circuit originally used for gating transceiving of cellular signals, and a change-over switch does not need to be additionally arranged to share the antenna. The radio frequency system is based on communication link multiplexing and gating circuit multiplexing, insertion loss can be effectively reduced, electromagnetic wave loss is reduced, and communication performance is improved. In addition, product cost can be reduced based on link multiplexing, and miniaturization design of products is facilitated.

The invention discloses a PIN (Personal Identification Number) amplitude limiter, which adopts a three-stage amplitude limiting structure, and the first-stage amplitude limiting structure, the second-stage amplitude limiting structure and the third-stage amplitude limiting structure respectively adopt N1, N2 and N3 pairs of diode strings which are reversely connected in parallel, so that the amplitude limiter has higher bandwidth while resisting high power; in addition, T-shaped microstrip lines are arranged between the first-stage amplitude limiting structure and the input end and between the third-stage amplitude limiting structure and the output end, microstrip lines are arranged between the adjacent amplitude limiting structures, and microstrip lines are arranged in the first-stage amplitude limiting structure, so that the amplitude limiter can meet insertion loss which is low enough.

The utility model discloses a packaged coupled antenna, belongs to the technical field of radio frequency communication and semiconductor packaging, and mainly solves the problems that a traditional packaged antenna is large in insertion loss, high in processing complexity and difficult to balance in performance and size. The antenna comprises a chip Die, an antenna coupling patch, an antenna radiation patch, a metal ground reflecting surface and a multi-layer packaging structure, and efficient transmission and radiation of radio frequency signals are achieved through non-contact electromagnetic coupling. Specifically, the antenna coupling patch is arranged on the middle layer of the on-chip packaging plate and is connected with the chip Die through a radio frequency signal line; the antenna radiation patch is arranged in parallel on the top layer of the packaging plate, the coupling patch is surrounded by a grounding metal through hole, and the lower end of the through hole is connected with a metal ground reflecting surface to form an electromagnetic shielding structure to reduce interference. According to the packaging coupling antenna, the length of the feeder line can be reduced through a coupling mode, so that the insertion loss of a radio frequency link is reduced, radio frequency wiring becomes simple, the processing difficulty is reduced, and the antenna performance is improved.

The present invention discloses a radio frequency power amplifier for vehicle networking communication, comprising an input four-way differential phase shift distribution and bias network, a first differential double-stacked amplifier, a second differential double-stacked amplifier, a third differential double-stacked amplifier, a fourth differential double-stacked amplifier, an inter-stage four-way differential matching and bias network, and an output four-way differential phase shift synthesis and bias network. The core architecture of the present invention adopts the high power and high gain characteristics of the double-stacked amplification network composed of field effect tubes in the radio frequency microwave band, and at the same time utilizes the good parasitic parameter suppression of the differential amplifier in the microwave frequency band, combined with the good power back-off efficiency characteristics of the double-stage Doherty drive amplification structure, so that the entire power amplifier obtains good high gain, high back-off efficiency and high power output capability.

The utility model discloses a memory expansion device and a server, the memory expansion device comprises a substrate, a memory expansion module and a multi-channel input / output interface group, and the memory expansion module is arranged on the substrate; the multi-channel input / output interface group is arranged on the substrate, the multi-channel input / output interface group is connected with the memory expansion module, and the multi-channel input / output interface group is used for being connected with a mainboard of a server. The memory expansion device is provided with the multi-channel input / output interface group, and the multi-channel input / output interface group of the memory expansion device can be directly connected with the mainboard of the server through the MCIO cable without an adapter plate, so that the adaptability of the memory expansion device and the server is improved; and the server mainboard is prevented from being connected through an adapter plate, so that the insertion loss can be effectively reduced.

The invention discloses a directional coupler device based on a power divider, and relates to the technical field of directional couplers, and the power divider is used for dividing input power into a plurality of equal or unequal power outputs. Comprising a first port, a second port, a third port, a first microstrip line, a second microstrip line, a third microstrip line, a fourth microstrip line, a fifth microstrip line, a sixth microstrip line, a seventh microstrip line, a first isolation resistor and a second isolation resistor. The frequency working range of the directional coupler can be expanded by increasing the order of the power divider, the directionality of the directional coupler is high, high port isolation can be achieved due to the fact that isolation resistors exist in output ports of the power divider, and therefore the high directionality of the directional coupler is achieved, and due to the fact that only microstrip lines, chip resistors and differential conversion devices are arranged, the circuit is simple, and cost is low. The directional coupler is simple in structure and easy to debug, can realize low insertion loss by using an unequal power divider, can be used for a vector network analyzer, and can output a reflected signal of a test port to a receiver of the vector network analyzer to obtain amplitude information and phase information of the reflected signal.

The invention discloses a preparation method of a waveguide-integrated three-lamination graphene electro-optical modulator, which adopts a three-lamination graphene capacitor structure, enhances the interaction between graphene and light, and can improve the device modulation efficiency and reduce the insertion loss under the same device size. The first graphene layer and the third graphene layer adopt an interconnection design, and after the third graphene layer is transferred, residual water is removed by adopting a vacuum annealing process, so that the third graphene layer can be attached to the surfaces of the first graphene layer and the dielectric layer, a device control circuit is simplified, and device miniaturization is facilitated.

This invention discloses an ultra-wideband high-power single-pole double-throw switch circuit with adjustable isolation, belonging to the field of microwave integrated circuit technology. The first and second branches of this circuit have identical structural parameters and are symmetrical about the microstrip line MILN1. Both the first and second branches can function as either conducting or isolating branches. Therefore, one branch can be used as a conducting branch for low-insertion-loss transmission of the input signal, while the other branch acts as an isolating branch to block the input signal transmission, thus achieving both low insertion loss and high isolation for the entire circuit. Furthermore, by adjusting the control voltage of transistor Q7 in the reconfigurable stub, the isolation can be further improved and adjusted according to changes in the desired operating frequency band. In this invention's circuit, adjusting the isolation does not affect the switch's power capacity or the insertion loss of the other branch, solving the problems of bandwidth limitations on isolation and poor high-frequency isolation in high-power single-pole double-throw switches.

The present invention designs a lumped power divider based on a T-type equivalent circuit and a design method thereof, wherein the lumped power divider includes an input port, two output ports and two branches; the two branches are symmetrical and identical; the input ends of the two branches are connected to the input port, and the output ends of the two branches are connected to at least two output ports in a one-to-one correspondence; one of the branches includes at least a first-order electromagnetic hybrid coupling T-type equivalent circuit, a second-order T-type equivalent circuit and a third-order T-type equivalent circuit. The above design ensures that the power divider achieves good working performance in each band of ultra-wideband frequency bands, the electromagnetic hybrid coupling T-type equivalent circuit effectively expands the bandwidth, and the use of resistors and capacitors for isolation has high isolation, low insertion loss, and good input and output impedance matching performance in the working frequency band, meeting the current market demand.

The invention discloses a high-power 4.5 GHz femtosecond laser generating device based on a Yb: KGW crystal, and belongs to the technical field of all-solid-state ultrafast laser. The device comprises a multimode pumping source, a collimation focusing system, a pair of plane mirrors serving as folding elements, a Yb: KGW crystal, a large-curvature radius concave mirror with a dispersion compensation function, a small-hole diaphragm and a large-curvature radius output coupling mirror. The length of a physical cavity is compressed by folding a light path through a plane mirror so as to realize the repetition frequency of more than GHz, and meanwhile, a laser mode at a gain crystal is increased by utilizing a large-curvature radius lens combination so as to be matched with a multimode pumping light spot. In combination with intracavity dispersion management and a hard Kerr lens mode locking technology, high-performance femtosecond laser output with the repetition frequency larger than 4 GHz and the average power larger than 3 W is finally achieved. The device is compact in structure, low in cost and good in stability, and has important application value in the fields of optical frequency combs, biological imaging, micromachining and the like.