267results about How to "Low insertion loss" patented technology

The invention belongs to the technical field of microwave passive devices, and discloses a millimeter wave duplex power divider based on a multilayer metal gap waveguide and a working method thereof, and the millimeter wave duplex power divider comprises a common channel, a low-frequency filtering power divider and a high-frequency filtering power divider; the input port of the common channel is used for being connected with an electromagnetic wave signal source, and the output end of the common channel comprises an upper output channel and a lower output channel. Wherein the first output channel is connected with the input port of the low-frequency filtering power divider, and the second output channel is connected with the input port of the high-frequency filtering power divider; the low-frequency filtering power divider and the high-frequency filtering power divider are stacked up and down and adopt double-layer metal gap waveguide structures; wherein a fourth-order resonant cavity is arranged in the double-layer metal gap waveguide structure so as to realize a duplex power division function; functions of a duplexer and a power divider are integrated, loss caused by machining and assembling errors is greatly reduced, and low insertion loss and high isolation between channels of the duplex power divider are achieved.

The invention provides a dual-polarization tunable mode converter and mode multiplexing system based on thin film lithium niobate, and belongs to the technical field of integrated photonic devices. The lithium niobate film sequentially comprises a substrate layer, a silicon dioxide layer, a lithium niobate film layer and a silicon dioxide cladding. The Mach-Zehnder structure manufactured on the lithium niobate thin film layer is composed of an input waveguide, an output waveguide, two Y-branch waveguides and two asymmetric strip-shaped waveguides. The input waveguide and the two asymmetric strip-shaped waveguides are connected through one Y-branch waveguide, and the output waveguide and the two asymmetric strip-shaped waveguides are connected through the other Y-branch waveguide; by adding a section of wide waveguide and tapered waveguides at two ends, TE and TM fundamental modes have a phase difference of pi with the other arm after passing through a phase shift region, and the phase difference of the front and rear arms is regulated and controlled to change between pi and 0, so that the switching of output modes is realized, and meanwhile, an effect irrelevant to polarization is achieved; and the device has the characteristics of high integration level, insensitive polarization, tunability and large bandwidth.

The invention discloses a Ka-band waveguide three-way power divider, which belongs to the technical field of microwave and millimeter waves, and is characterized in that a combining port is formed in the front side wall of a shielding box, and three distribution ports are formed in the rear side wall of the shielding box; a coplanar magic T equal power divider, a coplanar magic T equal power combiner, a branch waveguide unequal power divider, an L-shaped waveguide, a Z-shaped waveguide and a half waveguide-full waveguide gradual change structure are arranged in the shielding box. Wherein the coplanar magic T equal power divider comprises an E-T junction waveguide cavity, two equal branch waveguide cavities, a microstrip probe and a power resistance load, and outputs two paths of signals with equal amplitude and opposite phases; the branch waveguide unequal power divider comprises a four-branch waveguide directional coupler and an inclined-wedge-shaped waveguide matching load, and the output power ratio of a straight-through output port to a coupling output port is 2: 1. The filter has the advantages of being symmetrical in structure, good in amplitude and phase consistency, small in insertion loss, good in port standing wave and high in isolation degree.

The invention discloses a high-gain wide-beam telemetering ground receiving antenna based on a multi-array-element structure, which comprises an antenna array, a metal floor and an array base, and is characterized in that the antenna array adopts the multi-array-element structure and comprises eight antenna units; each antenna unit comprises a parasitic layer, a micro-strip antenna layer, a feed network layer and a metal cylindrical cavity structure, the parasitic layer, the micro-strip antenna layer, the feed network layer and the metal cylindrical cavity structure are sequentially supported, assembled and connected by medium supporting columns from top to bottom, and the feed network layer adopts a branch line directional coupler in a micro-strip form. According to the high-gain wide-beam telemetering ground receiving antenna based on the multi-array-element structure, the bandwidth of the microstrip antenna is widened in a parasitic structure mode, and the impedance bandwidth of the antenna is widened by adjusting the parasitic size and height; a metal cylindrical cavity is reinforced on the bottom layer of the microstrip network so as to enhance the gain and the axial ratio of the microstrip.

The invention discloses a high-power fast phase inversion switch based on a p-i-n diode, and relates to the technical field of high-power microwave p-i-n diode phase shifting. The inverter switch comprises a rectangular waveguide, 2N loading linear p-i-n diode phase shift circuits which are symmetrically and uniformly arranged on a narrow-side waveguide wall, and a bias power supply which provides bias voltage for the phase shift circuits. According to the invention, the loading line type p-i-n diode phase shift circuit is inserted into the waveguide structure, so that a microwave signal is transmitted along the waveguide transmission line instead of being transmitted along the metal microstrip line, the influence of the power loss of the p-i-n diode on the insertion loss of the phase shift circuit can be reduced, and the overall insertion loss is reduced; and meanwhile, phase inversion is realized by controlling the bias state of a p-i-n diode in the phase shift circuit, and nanosecond switching speed can be realized.

The invention discloses a short-wave strong electromagnetic pulse suppression circuit with direct current and control functions. The short-wave strong electromagnetic pulse suppression circuit comprises an I-stage transient protection circuit, a three-signal circuit and an II-stage transient protection circuit, the I-stage transient protection circuit is formed by connecting two stages of gas discharge tubes in series and is used for protecting a low-frequency part in the lightning electromagnetic pulse or the nuclear power electromagnetic pulse, and the output end of the I-stage transient protection circuit is connected with the three-signal circuit; the three-signal circuit provides a path for transmission of the short-wave signal, the direct-current signal and the control signal and carries out transient protection, and the output end of the three-signal circuit is connected with the II-stage transient protection circuit; and the II-stage transient protection circuit is a voltage clamping circuit consisting of a low-capacitance diode and a bidirectional transient suppression diode, and is used for protecting a high-frequency part in the lightning electromagnetic pulse or the nuclear power electromagnetic pulse and clamping the residual voltage at a relatively low level. The device can effectively protect thunder and lightning and nuclear power electromagnetic pulses, has the characteristics of small insertion loss, low residual voltage and the like, and can greatly improve the strong electromagnetic environment viability and anti-interference capability of a short-wave radio station.

The invention relates to the technical field of tuning data of filters, provides a tuning control method of a distributed microwave filter, and aims to solve the problem of difficulty in nonlinear relation and multivariable convergence between a debugging model and an actual model in a filter tuning process. The method comprises the steps of data preprocessing, spectrum analysis, error correction, tuning model construction and optimization and the like, a target frequency component and an interference frequency component in a signal are identified through a fast Fourier transform algorithm, a tuning model is optimized through a genetic algorithm, an optimal tuning parameter is calculated, and if the performance of a filter does not reach a target, the tuning parameter is calculated. According to the method, the accuracy of filter tuning control is improved, and the adaptability and the stability of the filter are enhanced.

The present invention relates to the field of antenna system technology, and in particular to a method for improving the operating performance of an antenna system and a method for simulating the operating performance of an antenna system. A metal truss electromagnetic window is used as a protective cover for the antenna system, and a variable-section electromagnetic window structure is used, wherein the variable-section electromagnetic window structure uses trusses of different widths to form irregular pseudo-randomly distributed trusses; the electromagnetic window pseudo-randomly distributed trusses are used to offset the scattering effect between the electromagnetic window trusses; the influence on the electromagnetic performance of the antenna system is weakened by offsetting the scattering effect between the trusses, thereby improving the operating performance of the antenna system; the variable-section electromagnetic window structure can also optimize the mechanical properties of the electromagnetic window. The present invention can achieve optimization effects on electromagnetic and mechanical properties by using a variable-section electromagnetic window structure, effectively improve the comprehensive electromechanical performance of the electromagnetic window, better provide services for the operation of the antenna system, and has good application prospects.

The invention discloses a waveguide coaxial filter, a design method thereof and a low-temperature receiver. The waveguide coaxial filter comprises a waveguide input port used for inputting an electromagnetic wave signal; the waveguide filtering structure is used for transmitting the electromagnetic wave signal in a waveguide transmission line mode and filtering a frequency spectrum signal with a set frequency in the electromagnetic wave signal; the waveguide coaxial conversion structure is arranged in the output port surface cavity of the waveguide filtering structure and is used for realizing mode conversion and impedance matching of the waveguide transmission line and the coaxial transmission line so as to convert a waveguide transmission line mode signal into a coaxial transmission line mode signal; and the coaxial output port is used for being connected with a coaxial transmission line so as to output a coaxial transmission line mode signal. A waveguide filtering structure and a waveguide coaxial conversion structure are integrally designed, so that the insertion loss performance is optimized on the whole, the size and weight of the device are greatly reduced, interconnection of systems and stability of the system structure are facilitated, and the low-temperature receiving device can be applied to low-temperature receivers in the aerospace field.

The invention discloses a K-band amplitude-limiting low-noise amplifier, and belongs to the technical field of radio frequency microelectronics. The circuit comprises an input matching module, a diode amplitude limiting module, an inter-stage matching module, a low-noise amplification module and an output matching module which are cascaded in sequence, the input matching module is used for realizing impedance matching between a radio frequency signal input end and the diode amplitude limiting module and transmitting a radio frequency signal; the diode amplitude limiting module is used for limiting the amplitude of the radio frequency signal and transmitting the radio frequency signal; the inter-stage matching module is used for realizing impedance matching between the diode amplitude limiting module and the low-noise amplification module; the low-noise amplification module is used for carrying out amplification processing on the radio frequency signal after amplitude limiting and transmitting the radio frequency signal; and the output matching module is used for realizing impedance matching between the low-noise amplification module and the radio frequency signal output end and outputting the amplified radio frequency signal. According to the invention, the amplitude of the input signal can be limited, so that the amplitude is kept in a bearable range of the low-noise amplification circuit, and the stability and reliability of the whole system are ensured.

The invention relates to a wide-stop-band cavity inverting filtering power divider, which comprises a metal cavity, a three-stage resonator arranged in the metal cavity, an input terminal and two output terminals, the three-stage resonator is formed by cascading three double-ridge waveguide resonators, and the two output terminals are arranged in the metal cavity. Adjacent double-ridge waveguide resonators are coupled through an evanescent mode rectangular waveguide, the coupling strength between the resonators can be adjusted through the width of the evanescent mode rectangular waveguide, the width of the evanescent mode rectangular waveguide is smaller than the width of the metal cavity, and the second-stage double-ridge waveguide resonator forms cross coupling with a source and a load. And cross coupling is formed between the first-stage double-ridge waveguide resonator and the third-stage double-ridge waveguide resonator. The inverted filtering power divider is designed by adopting the double-ridge waveguide and the evanescent mode rectangular waveguides with unequal section widths, the size of the device is reduced, a zero point is introduced into an upper stop band, and the depth of out-of-band rejection is improved. In addition, a metal plate is inserted in the middle of the cavity of the filtering power divider, the upper stop band width is expanded, and good out-of-band performance is achieved.

The invention discloses a high-angle stable frequency selective surface with an adjustable dual-frequency wave-transparent window. The frequency selective surface comprises a metal resonant structure, a dielectric substrate and a bottom-layer metal feed structure, the top metal resonant structure comprises a crossed dipole with an arc-shaped branch knot, an arc-shaped metal ring with a bent branch knot, and a square patch with an inner concave fillet at the periphery; the first variable capacitance diode is welded between the arc-shaped branch knot and the bent branch knot, and the second variable capacitance diode is welded between the patch and the arc-shaped metal ring; the bottom layer metal feed structure comprises a cross metal feed line and a T-shaped metal feed line, and lumped resistors are loaded between the feed lines to form a complete direct current power supply network; the upper surface and the lower surface of the dielectric substrate are communicated through metal via holes in the vertical direction, so that the bottom feeder line can provide reverse bias voltage for independently regulating and controlling the passband resonant frequency for the two sets of variable capacitance diodes on the top layer. According to the invention, the number of adopted active devices is small, and the antenna has the advantages of double-frequency independence, continuous adjustability and high-angle stability.

A homodyne detection Doppler wind measurement laser radar device based on a silicon optical chip comprises a light source module, a photoelectron chip module, a semiconductor optical amplifier, an erbium-doped optical fiber amplifier, an optical circulator, an optical transceiver antenna, a transimpedance amplifier processing module, an A / D acquisition card module, a digital signal processing module and a display and storage module. Discrete devices such as a beam splitter, a frequency mixer and a detector in an optical fiber link are integrated on one chip, high-density integration with other components is carried out through the photoelectric hybrid packaging technology, and chipping and miniaturization of the all-optical-fiber wind finding radar are achieved. The semiconductor optical amplifier (SOA) is used for chopping, a homodyne detection method is used for eliminating the requirement for frequency shift, and compared with a traditional Doppler wind measurement laser radar, the Doppler wind measurement laser radar has the advantages of being small in power consumption, small in size, light in weight, high in integration level, convenient to produce in a large scale, low in cost of a single device and the like.

According to the dual-passband low-frequency passband independent tunable frequency selective surface, a metal column penetrates through a cross-shaped structure metal layer to be connected with an upper dual-passband metal layer and a lower dual-passband metal layer, so that a multi-layer cascade structure is formed, the bandwidth is broadened, and the characteristics in passbands are adjusted; the upper dual-passband metal layer and the lower dual-passband metal layer comprise an outer metal frame and four branches in the outer metal frame, each branch is provided with a variable capacitance diode, and the side edge of each branch extends towards the outer metal frame and / or the outer metal frame extends towards the side edge of each branch to form a first gap; when direct current feed is carried out through the metal column, the variable capacitance diode provides a first capacitor, the first gap provides a second capacitor, the first capacitor is larger than the second capacitor, the first capacitor is used for controlling a low-frequency passband, and the second capacitor is used for controlling a high-frequency passband. When different direct-current voltages are applied to the two ends of the variable capacitance diode, the low-frequency passband moves, the high-frequency passband is kept unchanged, and independent tuning of the low-frequency passband is achieved.

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 discloses a tunable multi-layer substrate integrated waveguide filter with broadband external suppression, which is characterized in that a common multi-layer substrate integrated waveguide structure is expanded into a multi-layer air-filled substrate integrated waveguide structure; a specific geometric structure is cleverly excavated from a dielectric substrate through a cutting process in a classic multilayer substrate integrated waveguide structure, so that the loss of electromagnetic waves in penetrating through the dielectric substrate is reduced, and a plurality of rows of non-metal via holes are introduced into the multilayer substrate integrated waveguide structure. And the size of the resonant cavity of the multi-layer substrate integrated waveguide is adjusted in a mode that the metal probe is tuned to enter the non-metal via hole through a mechanical structure, so that a high-quality factor is kept in a tuning process.

The invention discloses a low-field nuclear magnetic resonance exploration device and method capable of effectively shortening dead zone time, and relates to the field of electric signal acquisition, and the device comprises an upper computer which is used for communicating with a main control circuit; the main control circuit is used for controlling and collecting the core and comprehensively controlling the work of the device; the power amplification circuit is used for amplifying the power signal input by the main control circuit and then transmitting an alternating current pulse to excite the coil; the beneficial effects of the invention are that the coil employs a transmit-receive integrated differential structure, which inhibits common-mode noise interference and improves the signal-to-noise ratio of detection; the Q-conversion circuit reduces the quality factor of the coil through parallel connection of energy discharge resistors at the two ends of the coil, the purpose of rapidly discharging energy stored in the coil is achieved, and the dead time can be effectively shortened; the high-isolation fast-switching radio frequency switch can effectively reduce the insertion loss and the generated noise, significantly reduce the switching time, further shorten the dead zone time, and improve the detection effect of a short relaxation target body.

The invention discloses an ultra-wideband small-phase-shift digital phase shift circuit and a simulation method thereof, the ultra-wideband small-phase-shift digital phase shift circuit comprises an ultra-wideband phase shift network, the ultra-wideband phase shift network adopts a bridge T-shaped network embedded with an all-pass network structure, and the all-pass network structure is a dual-port transformer network formed by winding two mutual coupling inductors. The bridge T network structure can realize miniaturization design, the all-pass network structure can realize ultra-wideband design, the bridge T network structure has better performance than a common switch, the phase shifter has wider bandwidth, higher phase shifting precision and better return loss than the common switch, and the all-pass network is suitable for the ultra-wideband characteristic. And the two are combined to improve the performance of the small-shift phase. The all-pass network structure is embedded between the input port and the output port of the bridge T-shaped network structure, phase delay can be increased, bandwidth expansion is guaranteed, and meanwhile it is guaranteed that phase shifting precision is not changed.

The invention discloses a parallel MEMS switch of a terahertz wave band, and belongs to the field of radio frequency front-end devices. The antenna is composed of a first-layer metal patch, a middle-layer dielectric plate, a second-layer metal patch, a high-resistance bias line, a dielectric film, a metal pier and a third-layer metal patch which are stacked from bottom to top. Wherein the first layer of metal patch is an integral metal ground; the middle dielectric plate is an integral dielectric layer; the second layer of metal patch comprises a coplanar waveguide signal ground, a coplanar waveguide signal line, a direct current bias electrode and a switch driving electrode; and the third layer of metal patch comprises a switch metal beam and a CPW closed bridge. The lower driving electrode of the switch is covered with a dielectric film with a larger area, the middle section of the CPW signal ground is provided with a section of lifting bridge, and the direct current bias line is wired through the bridge and connects the lower electrode of the switch to the direct current bias electrode.

According to the low-loss high-speed parallel line, the extrusion molding method of the insulating cores and the lotus root core extrusion molding mold, the low-loss high-speed parallel line comprises the two signal conductors which are arranged side by side, the outer side of each signal conductor is provided with the corresponding insulating core, and the two insulating cores are internally provided with the air channels which are distributed in a lotus root shape. The air channel enables the void ratio of the insulating core to be large, so that the dielectric constant of the whole cable can be reduced, the insertion loss is reduced to a great extent, and the cable is suitable for higher bandwidth data transmission requirements. Moreover, a shielding layer and an outer coating layer are sequentially arranged outside the two insulating cores from near to far, two drainage wires which are arranged side by side with the insulating cores and are symmetrical to each other are arranged between the shielding layer and the outer coating layer or between the two insulating cores and the shielding layer, and the two drainage wires are respectively and conductively connected with the shielding layer. Therefore, the grounding and tensile effects can be achieved, and the stability of the parallel line pairs can be effectively improved.

The invention relates to a four-passband power dividing filter based on microstrip line four-mode resonators. The four-passband power dividing filter comprises a dielectric substrate, a metal grounding plate, a central input port feeder line, two output port feeder lines, four microstrip four-mode resonators and two isolation resistors. A first micro-strip four-mode resonator and a second micro-strip four-mode resonator are arranged between the central input port feeder line and the first output feeder line. A third micro-strip four-mode resonator and a fourth micro-strip four-mode resonator are arranged between the input port feeder line and the second output feeder line. The first isolation resistor is bridged between the first micro-strip four-mode resonator and the third micro-strip four-mode resonator, and the second isolation resistor is bridged between the second micro-strip four-mode resonator and the fourth micro-strip four-mode resonator. Good output port isolation is achieved, good frequency table selectivity is achieved, the output ports are highly isolated, insertion loss is small, the structure is compact, production cost is low, and the filter is suitable for a modern wireless communication radio frequency front-end circuit system.

The invention relates to a 1-bit dual-polarization transmission array antenna unit applied to a 5G millimeter wave communication relay, which is suitable for the field of mobile communication, and comprises a pair of receiving / transmitting antenna units which are symmetrically arranged in an upper and lower structure overturning manner, and a single receiving / transmitting antenna unit comprises four groups of double-layer stacked patch units surrounded by cavities, the device comprises a power divider, a power division network formed by a strip line, a 1-bit digital phase shifter formed by a 3-dB directional coupler, two PIN diode switches connected in series at the tail end of the phase shifter, and a capacitive coupling structure. The patch and the power division network, the power division network and the PIN diode, and the power division network and the capacitive coupling structure are connected through vertical metalized via holes; by changing the states of the two PIN diode switches of the receiving / transmitting antenna at the same time, the phase shifter can provide two phase changes of 0 degree and 180 degrees; according to the invention, two PIN diodes are utilized to control four groups of patch antenna units at the same time, the high-precision beam scanning characteristic in a 1-bit dual-polarization two-dimensional plane is realized, the number of active devices is reduced, and the loss and power consumption of the antenna units are reduced.

According to the radio frequency switch, parallel inductors are added in a traditional circuit for matching, a low-Ron structure can be adopted, low insertion loss and high isolation degree of the radio frequency switch are achieved, the number of switch tubes is increased by additionally arranging the inductors compared with a traditional circuit, and the switch area is reduced.

The invention provides a cable-free network structure and an antenna system, and belongs to the technical field of communication. The cable-free network structure comprises a reflecting plate; the first phase shifting module comprises a power division phase shifting network and a corresponding first phase shifting medium group, the power division phase shifting network is provided with a first input port and a plurality of first output ports, the first input port is used for receiving signals, and the plurality of first output ports are used for outputting equal phase differences; the second phase shifting module comprises a plurality of two-way power dividers and corresponding second phase shifting medium groups, each two-way power divider comprises a second input port and two second output ports, the second input ports are connected with the first output ports, and the second output ports are used for sending signals; and the transmission mechanism respectively drives the first phase shifting medium group and the second phase shifting medium group to move at a preset displacement ratio so as to realize equal-phase-difference output in the same period. The cable-free network structure provided by the invention can simply realize equal-phase-difference output in the same period.

The invention provides a device and method for preparing a high-temperature-resistant multi-period fiber grating. The device comprises a femtosecond laser, a shutter, a variable attenuator, a cylindrical lens, a phase mask plate, a broadband light source, an optical fiber and a spectrograph. A femtosecond laser pulse emitted by the femtosecond laser passes through the cylindrical lens and the phase mask plate and forms interference fringes; different tensile forces are applied to the two ends of the optical fiber, the interference fringes are focused on an optical fiber core for inscribing, and the tensile forces are released after grating inscribing; the operation is repeated, the tension is released after each time of inscribing, and a plurality of fiber bragg gratings with different periods can be generated on a single optical fiber; therefore, the multi-period fiber grating array capable of monitoring the distributed temperature is formed.

The mechanical optical switch is suitable for switching of one-input and multiple-output optical path switches, the optical path switches are in butt joint with multiple optical fibers, the mechanical optical switch comprises a shell of a hollow structure, and a primary optical path adjusting assembly, a secondary optical path adjusting assembly and an optical window are arranged in the shell. Input light is transmitted to the primary light path adjusting assembly through the light window, the primary light path adjusting assembly is used for adjusting light path parameters of the input light, and the input light is input into part of components in the secondary light path adjusting assembly and is subjected to beam shrinking and focusing treatment through the secondary light path adjusting assembly. And the light beams subjected to beam shrinking and focusing processing are transmitted to the corresponding optical fibers, so that the light transmission efficiency is improved.

The invention provides an optical connector device including a pair of connectors including a first connector and a second connector. The optical connector device is capable of allowing a position offset of an optical fiber in at least a plane direction orthogonal to an axial direction. Wherein the first connector comprises an inner shell and an outer shell; the inner housing holds the first optical fiber unit. The inner housing is held by the outer housing so as to be floatable in the axial direction and in a plane direction orthogonal to the axial direction. The inner shell is provided with a first abutting part. The connector housing has a second contact portion on a connection side of the first connector and the second connector. When the first connector and the second connector are connected, the first abutting part and the second abutting part are in surface contact, and the first optical fiber and the second optical fiber are arranged along the connection direction.

The application relates to the technical field of phased array radars, in particular to a phased array radio frequency front-end circuit. The circuit comprises a front-stage processing module, a first-stage power division network, an intermediate-stage bidirectional amplification network, a second-stage power division network and a final-stage multifunctional network which are sequentially electrically connected; an external radio frequency signal input end is electrically connected with an input end of the front-stage processing module; the first-stage power division network has four first branch output ends which are respectively electrically connected with input ends of the intermediate-stage bidirectional amplification network; an output end of the intermediate-stage bidirectional amplification network is electrically connected with an input end of the second-stage power division network; the second-stage power division network has sixteen second branch output ends which are respectively electrically connected with input ends of the final-stage multifunctional network. The phased array radio frequency front-end circuit of the application adopts a multistage power division network and a topological structure, reduces the insertion loss in the multiway signal distribution process, and meets the packaging demand of miniaturization of the phased array front end.

This invention discloses a wideband, high-isolation single-pole five-throw switch chip, comprising six ports, two power ports, five control ports, twenty microstrip lines, one capacitor C1, twenty-five switching transistors, twenty-five gate resistors, and five voltage control modules. The six ports are port 1, port 2, port 3, port 4, port 5, and port 6; port 1 is the RF input port; ports 2, 3, 4, 5, and 6 are output ports. The RF input and output ports are connected via the two power ports, five control ports, twenty microstrip lines, one capacitor C1, twenty-five switching transistors, twenty-five gate resistors, and five voltage control modules. Compared to existing single-pole five-throw switches, this invention is integrated on a single chip, offering the advantage of small size. The use of voltage control modules significantly reduces the number of power supply modules, facilitating application.

According to the polarization-insensitive micro-ring resonator provided by the invention, the bus waveguide and the runway annular waveguide based on the SION waveguide are designed into the micro-ring resonator, the micro-ring resonator is simple in structural design, and the section shape of the SION waveguide is controlled to be square, so that the effective refractive index of a TE mode is close to that of a TM mode; due to the fact that the bus waveguide and the runway annular waveguide are coupled in the straight waveguide area, the optical coupling coefficient of the coupling area is the same as the effective refractive index of the waveguides, especially at the O wave band (1260-1360 nm), the excellent polarization insensitive characteristic is achieved at the position with the center wavelength being 1310 nm, and therefore the micro-ring resonator has the resonance wavelength polarization insensitive characteristic. Therefore, the micro-ring resonator has a good coupling area polarization insensitive characteristic, and the micro-ring resonator designed based on the above structure has low insertion loss, so that the application of the micro-ring resonator in the fields of filters, wavelength division multiplexing systems, optical sensors and the like with high polarization insensitive requirements is expanded.