118results about How to "Small insertion loss" patented technology

The invention discloses an optical gyroscope integrated chip based on a thin film lithium niobate photon integrated platform. The whole structure adopts a plurality of mixed bending waveguides with continuously variable curvature parts, so that insertion loss caused by mode field mismatch of the straight waveguides and the bending waveguides at the joints is reduced, high-order mode excitation is reduced, the whole size of the chip is reduced, the polarization extinction ratio of the chip is increased by the bending waveguides, and waveguide modes except a quasi TE00 mode are filtered out. Single-mode single-polarization work of the lithium niobate waveguide is achieved through waveguide mode leakage, the single-TE mode lithium niobate waveguide, except for a bent waveguide of a folded modulator and a coupler, on the whole chip forms a waveguide polarizer with a high polarization extinction ratio, and therefore on-chip single-mode single-polarization work can be achieved without additionally designing a polarizer; the complexity of the chip is effectively reduced, the stability of the chip is improved, and the size is reduced.

The invention relates to a dielectric filter and communication equipment, and the dielectric filter comprises at least two dielectric resonators which are connected with each other and a hole group, each dielectric resonator comprises a dielectric body and a resonant cavity, the dielectric body comprises a top surface and a bottom surface along a first direction of the dielectric filter, the resonant cavity penetrates through the top surface or the bottom surface, and the resonant cavity penetrates through the top surface or the bottom surface along a second direction of the dielectric filter. The dielectric body further comprises a first side face and a second side face, the hole sets are arranged between two adjacent dielectric resonators, each hole set comprises a first hole and a second hole, the two ends of the first hole penetrate through the top face and the bottom face respectively, the second hole penetrates through at least one of the first side face and the second side face, and the first side face and the second side face are arranged in the third direction of the dielectric filter. The projection of the first hole and the projection of the second hole are crossed, so that a magnetic field between two adjacent dielectric resonators is cut more sufficiently, the coupling strength between high-order modes of higher harmonics is reduced, the far-end suppression capability of the dielectric filter is improved, a low-pass filter does not need to be additionally arranged, and the cost and insertion loss are reduced.

The invention discloses a thin film lithium niobate waveguide polarizer. The overall structure adopts the two mixed bent waveguides, insertion loss caused by mode field mismatch at the joint of the straight waveguide and the bent waveguide is reduced, high-order mode excitation is reduced, the positions of the input and output waveguides are staggered through the two mixed bent waveguides which are centrosymmetric and have the same bending angle, the polarization extinction ratio of the chip is increased, and the polarization effect of the chip is improved. Waveguide modes except the quasi TE00 mode are filtered out, and polarization with the high polarization extinction ratio is achieved.

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 discloses a reverse design-based crossed waveguide structure, which comprises an integral lower cladding and a crossed waveguide main body structure, and is characterized in that the crossed waveguide main body structure is arranged above the integral lower cladding; the cross waveguide main body structure comprises a coupling area, an input waveguide and three output waveguides are distributed around the coupling area, the input waveguide and the three output waveguides are arranged perpendicular to the end face of the coupling area and connected with the center position of the coupling area, and the cross waveguide structure is high in integration level, high in transmittance and low in transmission loss and crosstalk. The invention further discloses a design method of the crossed waveguide, a direct binary search algorithm is adopted for the crossed waveguide structure, and the design method not only improves the integration level of the crossed waveguide structure and the transmissivity of the output waveguide, but also achieves lower transmission loss and crosstalk when different modes are input.

The invention discloses a duplexer topological structure, a radio frequency module and electronic equipment. The duplexer topological structure comprises a transmitting end filter connected between a transmitting end and an antenna port; a receiving end filter connected between the receiving end and the antenna port; wherein the receiving end filter comprises a plurality of first series resonators which are sequentially connected in series between the receiving end and the antenna port; every two adjacent first series resonators are grounded through a first parallel resonator; and the adjusting branch is connected with the receiving end filter and is used for adjusting the position of the parallel resonance point in the receiving end filter, so that the body wave of the resonator in the receiving end filter is located outside the passband of the receiving end filter. According to the technical scheme, the problem of insertion loss deterioration caused by the fact that the body wave of the resonator falls into the passband can be avoided, the insertion loss of the resonator can be reduced, and then the performance of the duplexer can be improved.

The invention discloses a double-broadband linear polarization-to-circular polarization electromagnetic surface, and relates to the technical field of wireless communication. The linear polarization-to-circular polarization electromagnetic surface comprises three layers of dielectric substrates, and an air gap or a foam layer is filled between the adjacent dielectric substrates. Forward patch metal units and backward patch metal units are periodically printed on the front and back surfaces of each layer of dielectric substrate; the forward patch metal unit is composed of four fan-shaped patches in mirror symmetry and two rectangular strips, and the backward patch metal unit only comprises a metal strip penetrating through the whole unit. According to the invention, the axial ratio bandwidth optimization of the low-frequency band and the high-frequency band can be realized by adjusting the unit size, the gap of the dielectric substrate, the width of the metal strip, the fan-shaped patch and the size of the coupling gap. The dual-broadband linear polarization-to-circular polarization electromagnetic surface provided by the invention can cover a K / Ka satellite communication frequency band, has the characteristic of low insertion loss, and can be applied to common-caliber dual-circular polarization high-throughput satellite communication.

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 a phase shifter and a base station antenna. The phase shifter comprises at least one phase shifting cavity, phase shifting units and isolation assemblies, wherein each phase shifting cavity corresponds to one phase shifting unit and one isolation assembly; the phase shift unit comprises a first feed network and at least two phase shifter modules, and the first feed network is arranged in one part of the area in the phase shift cavity and is used for being electrically connected with the feed end of the radiation unit; the isolation assembly is configured to be capable of defining at least two accommodating cavities in the other part of area in the phase shift cavity, and each accommodating cavity is provided with an opening; the phase shifter modules are respectively and correspondingly arranged in the accommodating cavities, and are respectively connected with the first feed network through respective openings. The phase shifter and the antenna are low in loss and high in radiation efficiency.

The invention discloses a dual-mode power amplifier, a control method and a transmitter. The power amplifier comprises a first mode branch and a second mode branch, the first end of the series-connected at least one transistor of the first mode branch is connected with the input end of the first mode branch through a first mode input pre-matching network, and the second end of the series-connected at least one transistor of the first mode branch is connected with the output end of the first mode branch through a first mode output pre-matching network; at least one transistor of the second mode branch is connected in series and then is respectively connected with the input end and the output end of the second mode branch; the input end of the first mode branch is connected with the input end of the second mode branch, and the output end of the first mode branch is connected with the output end of the second mode branch; when one mode branch works, the transistor in the other mode branch serves as impedance matching and does not participate in signal amplification work, and the power amplifier can reduce the area of the circuit and reduce power consumption.

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 invention discloses a microwave digital control delay device chip, including a radio frequency signal input terminal, an input signal switch path selection circuit, an output signal switch path selection circuit, a delay channel circuit, a reference channel circuit and a microwave signal output terminal; the input terminal of the input signal switch path selection circuit is connected to the radio frequency signal input terminal, the output terminal of the input signal switch path selection circuit is connected to the input terminal of the reference channel circuit and the input terminal of the delay channel circuit, the output terminal of the reference channel circuit and the output terminal of the delay channel circuit are connected to the input terminal of the output signal switch path selection circuit, and the output terminal of the output signal switch path selection circuit is connected to the microwave signal output terminal; the reference channel circuit includes an amplitude and equalization adjustment circuit for adjusting the signal amplitude and the signal equalization amount, and the delay channel circuit includes a plurality of delay unit circuits connected in series. The invention has the beneficial effects of high amplitude consistency, miniaturization, high integration and low insertion loss.

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 present invention provides a microwave packaging circuit and packaging method. The microwave packaging circuit comprises a microwave circuit, a shell cavity, a shell cover, a first protective layer and a second protective layer; the bottom of the microwave circuit is fixed to the shell cavity, the first protective layer is coated on the surface of the microstrip line in the microwave circuit, and the second protective layer is filled between the surface of the first protective layer and the shell cover; the dielectric loss tangent of the first protective layer is less than the dielectric loss tangent of the second protective layer. The present invention can provide anti-overload impact protection for the microwave circuit while ensuring the performance of the microwave circuit.

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 present invention discloses a compatible upgradeable multi-system combining platform, comprising a subunit module, a module to be upgraded and a main unit, wherein the subunit module comprises at least one subunit submodule for connecting a corresponding signal end, the module to be upgraded and the subunit are arranged in parallel, the main unit is connected to an antenna feed system, the main unit comprises a first combining unit and a second combining unit, the first combining unit comprises a first filter and at least one first matching filter, the second combining unit comprises a second filter and at least one second matching filter, wherein the module to be upgraded is respectively connected to the first matching filter and the second matching filter. The present invention is convenient to upgrade and has low insertion loss, and does not need to disconnect the original antenna feed link during upgrading, and is simple and quick to operate.

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 invention discloses a passive device synthesis method based on a convolutional neural network and a related device, and belongs to the field of millimeter wave and terahertz passive device design, and the method comprises the following steps: pixelating a plurality of arbitrary passive network structures, and carrying out the electromagnetic simulation of the pixelated arbitrary passive network structures, obtaining a two-dimensional matrix and a corresponding S parameter; expanding a data set corresponding to the S parameter and the two-dimensional matrix by using the generative adversarial network; constructing a function fitting relationship between the two-dimensional matrix and the S parameter by using a relationship fitting model based on the two-dimensional matrix and the corresponding S parameter; and based on a function fitting relationship between the two-dimensional matrix and the S parameter, optimizing the S parameter through a global optimization algorithm to obtain an optimal passive network structure, and realizing passive device integration. According to the invention, the problem that the relationship between the S parameter of the passive network and the topological structure is difficult to analyze can be solved.

The utility model provides a power change-over switch, which comprises a driver, a plurality of branches and at least one isolation branch, each branch comprises a feed inductor and a diode which are sequentially connected in series along the control end of the driver, one end of each feed inductor is electrically connected with the control end, the other end of each feed inductor is electrically connected with the negative electrode of the corresponding diode, and the isolation branch is connected with the control end of the driver. When the voltage of the control end of the driver is larger than or smaller than the voltage of the positive electrode of the diode, the diode is switched off or switched on, and the branch circuit does not output or output; each isolation branch comprises a diode cathode electrically connected to the branch and a diode at the output end of the branch, and at least one branch is electrically connected with at least one isolation branch. The power divider is low in insertion loss and high in isolation degree.

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.