168 results about "Electrical length" patented technology

The invention relates to the technical field of antennas, and further relates to a wide-beam multi-vibrator planar antenna supporting Tiantong Beidou frequency bands, which comprises a multi-vibrator radiation array element layer, a coplanar feed-amplitude shaping network, a stepped impedance matching section, a low-loss double-layer dielectric laminated layer and a metal reflecting plate, the outermost side of the multi-oscillator radiation array element layer is a PCB lamination layer; the coplanar feed-amplitude shaping network comprises a radiation patch, and different current amplitudes are provided for all oscillators through phase shift sections with different electric lengths so as to ensure that the half-power beam width can still reach 90 degrees or above under the condition of the shortest Beidou wavelength; the stepped impedance matching section is a pi-shaped converter formed by connecting three microstrip lines with different widths in series; and the low-loss double-layer dielectric laminated layer is used for solving the minimum distance between the metal reflecting plate and the PCB laminated layer according to the theoretical minimum gain. The antenna has the advantages of compact structure, stable gain and wide beam width.

The invention provides terminal equipment. The terminal equipment comprises a metal floor, a radiation branch knot and a feed source, the radiation branch knot is adjacent to and parallel to the preset edge of the metal floor, the projection of the radiation branch knot on the preset edge of the metal floor is located in the preset edge, and the radiation branch knot comprises at least one connecting part connected with the preset edge of the metal floor; the feed source is electrically connected with the radiation branch knot and is used for exciting the radiation branch knot to generate excitation current conducted along a first direction, so that the preset edge of the metal floor generates floor current, and the direction of the floor current of a first area corresponding to the radiation branch knot in the preset edge of the metal floor is a second direction; the direction of floor current in a second area in the preset edge of the metal floor is a first direction, the second area is adjacent to the first area, and the second direction is opposite to the first direction; the radiation branch comprises a main branch whose electrical length is 1 / 2 of the wavelength corresponding to the preset frequency band. Due to the current distribution, the directivity coefficient after far-field radiation electric field vector superposition is reduced, and the omni-directivity of the antenna is improved.

According to an embodiment, a plasma processing system includes a plasma chamber, an RF source, a matching circuit, a balun, and a resonating antenna. The resonating antenna includes a first and a second spiral resonant antenna (SRA), each having an electrical length corresponding to a quarter of a wavelength of a frequency of a forward RF wave generated by the RF source. The first end of the first SRA is coupled to a first balanced terminal of the balun and the second end of the first SRA is open circuit. The first end of the second SRA is coupled to a second balanced terminal of the balun and the second end of the second SRA is open circuit. The first and the second SRA are arranged in a symmetrically nested configuration having a same center point.

Provided in the present application is a terminal device, which comprises a metal ground plane, a radiating element and a feed source. The radiating element is arranged adjacent to and in parallel with a predetermined side of the metal ground plane, and the projection thereof on the predetermined side of the metal ground plane is located within the predetermined side. The radiating element comprises at least one connection portion connected to the predetermined side of the metal ground plane. The feed source is electrically connected to the radiating element and is used for exciting the radiating element to generate an excitation current conducted in a first direction, so that the predetermined side of the metal ground plane generates a ground plane current, wherein the direction of the ground plane current in a first region in the predetermined side of the metal ground plane corresponding to the radiating element is a second direction, and the direction of the ground plane current in a second region in the predetermined side of the metal ground plane is the first direction, the second region being adjacent to the first region, and the second direction being opposite to the first direction. The radiating element comprises a main element of which the electrical length is 1 / 2 of the wavelength corresponding to a preset frequency band. Such a current distribution reduces the directivity coefficient after vector superposition of far-field radiation electric fields, thereby improving the omnidirectionality of antennas.

An antenna assembly, an electronic device main body, an electronic device, a storage medium and a control method of the electronic device, the antenna assembly comprises a circuit board, a main radiator, a parasitic radiator and a switching circuit, the main radiator is connected with a feed circuit of the circuit board, and the parasitic radiator is connected with the switching circuit. And the switching circuit is used for enabling the main radiator to feed the parasitic radiator under the conduction condition, and the switching circuit is used for enabling the main radiator not to feed the parasitic radiator under the turn-off condition. The parasitic radiator is controlled by the switching circuit, and the switching circuit can enable the main radiator to feed the parasitic radiator, so that the electrical length of the antenna assembly can be increased, and the antenna efficiency of the antenna assembly can be improved. In some application scenarios, if the parasitic radiator participates in radiation, the antenna performance is deteriorated, and the parasitic radiator can be controlled not to participate in radiation of wireless signals through the switching circuit, so that the antenna assembly can maintain better antenna performance in various application scenarios.

This application provides an antenna system and an electronic device, relating to the field of electronic device technology, enabling the antenna system on the electronic device to simultaneously consider both directivity and hand grip performance in landscape mode. The antenna system includes a first antenna, the radiator of which includes a first stub and a second stub; the first stub is disposed on a first side of the electronic device, the second stub is disposed on a second side of the electronic device, a first feed point is disposed at the connection between the first stub and the second stub, a first ground point is located on the portion of the radiator between the first feed point and the first end, and the electrical length of this portion of the radiator is 1 / 2 wavelength to 1 wavelength; a second ground point is located on the portion of the radiator between the first feed point and the second end, and the electrical length of this portion of the radiator is 1 / 8 wavelength to 1 / 2 wavelength. The antenna system provided by this application is used for signal transmission and reception.

A Doherty amplifier according to the present disclosure comprises a main amplifier, an auxiliary amplifier, a distribution circuit that distributes signals to the main amplifier and the auxiliary amplifier, and a phase compensation circuit. The main amplifier has a first input matching circuit and a plurality of main amplification stages. The auxiliary amplifier has a second input matching circuit and a plurality of auxiliary amplification stages. The distribution circuit has a first line connected to the first input matching circuit and a second line connected to the second input matching circuit. The electrical length of the first line is such that the input impedance of the first line is higher than the characteristic impedance of the first line and the imaginary component is less than 10% of the real component when a small signal is input. The electrical length of the second line is such that the input impedance of the second line is higher than the characteristic impedance of the second line and the imaginary component is less than 10% of the real component when a small signal is input. The phase compensation circuit is provided in an inter-stage matching circuit of the plurality of main amplification stages or the plurality of auxiliary amplification stages.

The application discloses a terahertz metasurface reflection unit based on a MEMS switchable delay line, and belongs to the field of radio frequency front-end devices.The unit adopts a sandwich structure of upper and lower glass substrates and a middle bonded metal surface, and a metal radiation patch, a phase delay line and a MEMS switch are integrated on the upper surface.The core is to control the on-off state of the phase delay line through the MEMS switch: when the switch is turned off, the unit is in a reference electrical length;when the switch is turned on, the current path is lengthened, so that the reflection phase lags by about 180 degrees, thereby realizing 1-bit phase coding.The design ingeniously combines the MEMS switch and the delay line, has the advantages of low driving voltage, low reflection loss and high phase control precision in the terahertz frequency band, and provides a feasible hardware solution for the practical application of a reconfigurable intelligent surface in a terahertz communication system.

The invention discloses a quasi-true time delay broadband beam forming network with Chebyshev amplitude distribution. The quasi-true time delay broadband beam forming network comprises a 3 * 4 beam forming network, a 4 * 4 true time delay network, an input port, an output port and the like. The 3 * 4 beam forming network comprises first to tenth parallel double-line couplers, first to seventh open-short circuit stub loading transmission lines and first to fourth 50-ohm transmission lines; the 4 * 4 real time delay network comprises first to eleventh real time delay circuits and first to fourth connecting lines. Broadband Chebyshev amplitude output is obtained by setting different coupling coefficients of the first to tenth parallel double-line couplers. In-band flat phase difference output is obtained by setting phase shift values of the first to fourth 50-ohm transmission lines, phase shift values of the first to seventh open-short circuit stub loading transmission lines and impedance values and electrical lengths of the open-short circuit stubs; through controlling the first to eleventh true time delay circuits, the phase slope between the output ports has a frequency-dependent characteristic, and after the antenna is connected, a consistent beam direction in a broadband range is obtained.

Provided in the present application is a terminal device, which comprises a metal ground plane, a radiating element and a feed source. The radiating element is arranged adjacent to and in parallel with a predetermined side of the metal ground plane, and the projection thereof on the predetermined side of the metal ground plane is located within the predetermined side. The radiating element comprises at least one connection portion connected to the predetermined side of the metal ground plane. The feed source is electrically connected to the radiating element and is used for exciting the radiating element to generate an excitation current conducted in a first direction, so that the predetermined side of the metal ground plane generates a ground plane current, wherein the direction of the ground plane current in a first region in the predetermined side of the metal ground plane corresponding to the radiating element is a second direction, and the direction of the ground plane current in a second region in the predetermined side of the metal ground plane is the first direction, the second region being adjacent to the first region, and the second direction being opposite to the first direction. The radiating element comprises a main element of which the electrical length is 1 / 2 of the wavelength corresponding to a preset frequency band. Such a current distribution reduces the directivity coefficient after vector superposition of far-field radiation electric fields, thereby improving the omnidirectionality of antennas.

Embodiments of the present application relate to an amplifying device and a transmitter. An amplifying device and a transmitter capable of compensating for a parasitic component of a circuit element without complicating a circuit structure are provided. The amplifying device includes a first amplifier that performs an amplifying operation on a signal; N-1 second amplifiers that perform an amplifying operation on the signal in sequence according to an amplitude of the signal in a case where the first amplifier performs the amplifying operation; N input networks connected to an input terminal that inputs the signal; N output networks connected between an output node of the first amplifier and a load connection node and connected between output nodes of the N-1 second amplifiers and the load connection node; and a first bias network that supplies a direct current bias voltage to at least one of the N output networks, an electrical length of the first bias network being less than 90 degrees.

The utility model discloses a microstrip patch antenna which comprises a dielectric substrate and a radiation patch. The radiation patch is arranged on the dielectric substrate, the radiation patch is E-shaped, the parallel edge of the E-shaped radiation patch is defined as a first sub-radiation patch, the vertical edge of the E-shaped radiation patch is defined as a second sub-radiation patch, and the length of the first sub-radiation patch is larger than or equal to 2.1 mm and smaller than or equal to 2.5 mm. The E-shaped structure enables the current to bypass between the first sub radiation patch and the second sub radiation patch, which is equivalent to increasing the electrical length of the radiation patch and reducing the resonant frequency of a fundamental mode, so that the low-frequency band bandwidth is broadened; the edges of the first sub-radiation patch and the second sub-radiation patch can generate strong electromagnetic field coupling to excite an additional parasitic resonance mode, so that the frequency band is further widened, and the bandwidth of the microstrip patch antenna is effectively widened. Wherein the first sub radiation patch of 2.1 mm to 2.5 mm enables the resonant frequency of the microstrip patch antenna to range from 43.7 Ghz to 55.1 Ghz, the relative bandwidth is 23%, and high bandwidth is achieved.

Embodiments of the present application provide a calibration device, a differential clamp, and related devices and systems. The calibration device includes a non-equivalent length reflection calibration piece for calibrating a scattering parameter of a differential signal obtained based on the differential clamp. The non-equivalent length reflection calibration piece includes a first line and a second line. An electrical length of the first line is not equivalent to an electrical length of the second line. A difference between a length of the first line and a length of the second line is within a preset range. The preset range is determined based on a bandwidth of the differential signal. Embodiments of the present application can accurately obtain the scattering parameter of the differential signal in the case of using the differential clamp.

Distribution element high-frequency (HF) filter, comprising: a ceramic substrate that has a grounding plate on a first surface of the substrate; a first resonator on a second surface of the substrate opposite the first surface, wherein the first resonator is electrically connected to a first input / output interface (I / O interface) near a first end of the substrate; a second resonator on the second surface of the substrate, wherein the second resonator is electrically connected to a second I / O interface near a second end of the substrate opposite the first end; one or more intermediate resonators on the second surface of the substrate, wherein the one or more intermediate resonators are located between the first and the second resonator, wherein each of the first, second and one or more intermediate resonators has an electrical length that nominally corresponds to half a wavelength of a center frequency of the filter, wherein each of the first, second and one or more intermediate resonators comprises a resonator section between first and second resonator end sections, which are electrically connected to the grounding plate by a conductive wall near a common side of the substrate, wherein each resonator at least partially surrounds a section of the surface of the substrate on which the resonator is located.

A broadband low insertion loss limiter chip based on a hybrid π-type topology, belonging to the technical field of microwave passive devices, solves the problems of high small-signal insertion loss, narrow operating bandwidth and large size of existing microwave limiters; by replacing the quarter-wavelength transmission line between the limiter circuits with a capacitive-loaded hybrid π-type structure, the electrical lengths of the first and second tapered U-shaped transmission lines in the two hybrid π-type structures are much less than 90° and are bent, reducing the area of the limiter chip; the first-stage limiter circuit reduces the total equivalent capacitance, thereby reducing the insertion loss; the electrical length of the transmission line is shortened, and its physical length is correspondingly shortened, reducing the insertion loss; in the two hybrid π-type structures, the total turn-off capacitance of each stage of the limiter circuit is absorbed into the hybrid π-type structure, making the limiter equivalent to a quasi-50-ohm transmission line model at small signals, thereby eliminating the influence of the turn-off capacitance reactance loaded on the transmission channel on impedance matching and expanding the operating bandwidth of the limiter.

The invention belongs to the field of superconducting receiving, and provides an HTS filter based on a full-wavelength resonator in order to improve the power capacity of the HTS filter, the HTS filter comprises a dielectric substrate, an HTS film is deposited on the first surface of the dielectric substrate, and a grounding metal layer is arranged on the second surface opposite to the first surface; the microstrip resonant structure is formed on the HTS thin film of the dielectric substrate and comprises at least two full-wavelength resonators, the adjacent full-wavelength resonators realize electromagnetic coupling through a gap, and the equivalent electrical length of each full-wavelength resonator is a waveguide wavelength corresponding to the working center frequency of the HTS filter; and the input port and the output port are respectively coupled with the full-wavelength resonator on the outermost side in the micro-strip resonant structure through micro-strip feeder lines. According to the technical scheme, the full-wavelength resonator structure with the equivalent electrical length as the waveguide length is adopted, so that the radio-frequency current can be redistributed along a longer resonance path, and the power capacity of the HTS filter is improved on the premise that the device size and the manufacturing complexity are not remarkably increased.

The invention relates to a low-profile antenna which is distributed in a central symmetry manner, and comprises a radiation unit which is located on a dielectric plate and comprises a plurality of radiation patches with arc edges and a plurality of parasitic patches; orthographic projections of the plurality of radiation patches and the plurality of parasitic patches on the top surface of the dielectric plate are alternately arranged along the circumferential direction; wherein the plurality of radiation patches extend towards the center of the dielectric plate along the radial direction of the dielectric plate and are connected, a slot line which partially penetrates through the parasitic patch is formed by the parasitic patch, and a preset distance is formed between the slot line and the center; the grounding device comprises metal plates which are arranged at the periphery of the radiation unit and are in one-to-one correspondence with the parasitic patches, and metal columns of which the two ends are respectively connected with the metal plates and the circuit board; one end of the coaxial feeder line is located in the center and connected with the radiation patches, and the other end of the coaxial feeder line is connected with the circuit board, so that the sum of the electrical lengths of any radiation patch and the coaxial feeder line is located in a preset range. The antenna can realize miniaturization and low profile in an L frequency band, and has a wide beam characteristic and a relatively wide working bandwidth at the same time.

Provided is an electronic device including an antenna for performing wireless communication, a noise source that causes generation of radiation current, and a conductive member that is disposed on a propagation path of the radiation current from the noise source to the antenna and has a projecting portion projecting from the propagation path. An electrical length to a tip end of the projecting portion is equal to or larger than one-eighth but equal to or smaller than three-eighths of a wavelength used in the wireless communication.

The present invention proposes a broadband, low-profile, dual-polarization omnidirectional antenna, comprising a horizontally polarized radiator, a metal coupling patch, a vertically polarized radiator, and a metal floor, arranged sequentially from top to bottom. The horizontally polarized radiator comprises a dielectric substrate, and horizontally polarized radiating patches and a feed network printed on its upper and lower surfaces. The metal coupling patch comprises a metal disk and a metal ring nested on its circumference. The horizontally polarized radiating patch and the metal disk are connected via a first short-circuit line, and the metal ring and the horizontally polarized radiating patch are connected to the metal floor via four second short-circuit lines and four third short-circuit lines, respectively. The present invention achieves coupling between the horizontally polarized radiator and the vertically polarized radiator by short-circuiting the horizontally polarized radiating patch and the metal disk, and the metal ring and the horizontally polarized radiating patch and the metal floor, thereby extending the electrical length of the antenna, effectively broadening the antenna's bandwidth, and reducing the antenna's profile.

A transmission circuit (10) is provided with: an input terminal (T0) for receiving a high-frequency signal; output terminals (T1, T2); amplification circuits (105A, 105B); a connection line (145); output circuits (170A, 170B); and switches (S1A, S1B). Each amplification circuit amplifies the high-frequency signal received at the input terminal. The output circuit (170A) transmits a signal amplified by the amplification circuit (105A) to the output terminal (T1). The output circuit (170B) transmits a signal amplified by the amplification circuit (105B) to the output terminal (T2). Each amplification circuit includes a carrier amplifier, a peak amplifier, and a hybrid coupler. In each amplifier, the carrier amplifier and the peak amplifier are respectively connected to two input terminals of the hybrid coupler. A corresponding output circuit is connected to one output terminal of the hybrid coupler. Each switch is connected to the other output terminal of the hybrid coupler. One output terminal of one hybrid coupler and one output terminal of the other hybrid coupler are interconnected via the connection line. High-frequency signals of mutually different phases are supplied to the first and second amplification circuits. The connection line has the same electrical length as that of at least one phase shift line of the hybrid couplers.

The application discloses a balanced-to-balanced coaxial line impedance transformer, and belongs to the electronic technical field.The coaxial line impedance transformer is composed of four coaxial lines with the same characteristic impedance and electrical length, the coaxial line has an inner conductor and an outer conductor, the coaxial line impedance transformer has two balanced radio frequency ports Z L and Z H , and the 2.25:1 Z H / Z L impedance transformation ratio is realized by connecting the inner conductor and the outer conductor between different ports of the four coaxial lines.The application breaks through the minimum impedance transformation ratio of 4:1 that can be realized by the prior art, can satisfy the impedance transformation requirement below 4:1, can be combined with other impedance transformers to realize the impedance transformation ratio with smaller discrete value, is helpful to the miniaturization, low insertion loss and multi-path power synthesis scheme, and can satisfy the high power and high efficiency application demand above 2kW.

The utility model discloses a topological structure, comprising a parallel three-line, a first open-circuit branch, a second open-circuit branch, an input port and an output port, one end of the parallel three-line is respectively connected with the input port and the output port, and the other end of the parallel three-line is respectively connected with the first open-circuit branch and the second open-circuit branch. The first open-circuit branch knot and the second open-circuit branch knot are bilaterally symmetrical about the parallel three lines, and the electrical length of the parallel three lines, the electrical length of the first open-circuit branch knot and the electrical length of the second open-circuit branch knot are all 1 / 4 wavelengths corresponding to the center frequency of the band-pass filter based on the topological structure. And the characteristic impedance of the first open-circuit branch knot is equal to that of the second open-circuit branch knot. The utility model further discloses a high-selectivity broadband band-pass filter based on the topological structure, and the high-selectivity broadband band-pass filter has the advantage of high selectivity.

This invention discloses an electrically tuned high-power telescopic antenna system and method for use in an electromagnetic reverberation chamber. The system includes a base unit with a telescopic antenna rod slidably connected to it. The telescopic antenna rod's electrical length can be adjusted by changing its extension length to accommodate resonance requirements at different test frequencies. An electrically driven mechanism is installed within the base unit, with its power output connected to the telescopic antenna rod. The telescopic antenna rod is electrically connected to an RF feed unit for feeding external RF power into the telescopic antenna rod. A position feedback sensor is installed in the base unit. A control unit is optically connected to the electrically driven mechanism and the position feedback sensor, forming a closed-loop control based on the signal from the position feedback sensor. This invention achieves good impedance matching within the 30MHz–80MHz frequency band, solving the problem of severe mismatch in this band with existing antennas. It provides precise tuning, good matching, and ensures that the VSWR meets test requirements across the entire frequency band.

The present application provides an antenna unit and an electronic device. The antenna unit includes: a first radiator, a second radiator, a first transmission line and a first feed source. Both ends of the first radiator and the second radiator are open ends, and the electrical length of the first radiator and the second radiator is greater than or equal to 1 / 2 of the first wavelength. The first radiator has a first feeding point and a first grounding point set at intervals, and the second radiator has a second feeding point and a second grounding point set at intervals. The first grounding point is located in the middle of the first radiator, and the second grounding point is located in the middle of the second radiator. The first transmission line is electrically connected to the first feed source, and the two ends of the first transmission line are electrically connected to the first feeding point and the second feeding point respectively, for inputting a first radio frequency signal of the same frequency band to the first feeding point and the second feeding point. As a result, the electronic device meets the requirements of an ultra-thin design with a thickness greater than or equal to 5 mm and an extreme design with a screen-to-body ratio greater than or equal to 100%, thereby improving the user experience.

The low-profile dual-polarized omnidirectional full-duplex antenna comprises a vertical omnidirectional antenna unit, a horizontal omnidirectional antenna unit and a second horizontal dielectric substrate, wherein a metal floor is printed on the lower surface of the second horizontal dielectric substrate; a first radiation arm and a second radiation arm which are connected through metalized via holes are printed on two plate surfaces of two crossed dielectric substrates in the vertical omnidirectional antenna unit respectively; a plurality of rectangular grooves which are arranged in a radial manner are etched in the metal floor; the horizontal omnidirectional antenna unit is connected with the metal floor through four metal columns. The four metal columns can enable coupling current generated by the vertical omnidirectional antenna unit to the horizontal omnidirectional antenna unit to be short-circuited to the metal floor, the electrical length of the vertical omnidirectional antenna unit is increased, meanwhile, a plurality of rectangular grooves which are formed in the metal floor in a radioactive mode are etched, radial surface current can be blocked, and the coupling current is reduced. Omnidirectivity of the horizontal antenna is guaranteed, the profile height of the antenna is reduced, and the radiation arms on the two surfaces of the two vertical dielectric substrates improve isolation between antenna ports.

A retroreflective antenna according to one embodiment includes: an antenna main body for retroreflecting incoming radio waves; and a passive notch filter, in which the antenna main body includes a plurality of pairs of antenna elements, and a plurality of transmission lines provided corresponding to the plurality of pairs of antenna elements, each pair of antenna elements in the plurality of pairs of antenna elements is disposed point-symmetrically with respect to a reference point in the antenna main body, each of the plurality of transmission lines connects corresponding pair of antenna elements among the plurality of pairs of antenna elements, electrical lengths of the plurality of transmission lines are the same, and the passive notch filter is provided in at least one transmission line among the plurality of transmission lines.

An antenna radiation arm, an antenna radiation unit and a multi-frequency array antenna, each pair of dipoles of the antenna radiation unit comprises two oppositely arranged antenna radiation arms, the antenna radiation arms have a ring-shaped conductive structure, and an inductive circuit structure is arranged on the conductive structure to extend the electrical length of the conductive structure, which realizes the miniaturization of the physical size on the one hand, and enables the antenna to pass through the first frequency band signal and filter out the second frequency band signal on the other hand, reduces the mutual coupling between the array elements in the design environment with limited array height and space, and reduces the influence of the low-frequency antenna on the high-frequency antenna radiation performance. The antenna radiation arm comprises a driving arm and a parasitic arm, the driving arm is connected to a feed balun and has two radiation branches; the two ends of the parasitic arm are opposite to the two radiation branches of the driving arm, and enclose the ring-shaped conductive structure; the two radiation branches of the driving arm are coupled to the two ends of the parasitic arm through a capacitive structure, and form a resonance to the first frequency band signal, thereby widening the impedance bandwidth.

The embodiment of the invention provides an antenna. The antenna comprises a flexible substrate which can be bent and folded according to a preset situation; the antenna main body is mounted on the surface of the flexible substrate; the antenna main body comprises a feeding point, a ground feeding point, a first branch knot and a second branch knot, and the first branch knot and the second branch knot are symmetrical about the perpendicular bisector of the flexible substrate in the first direction; the feeding point is arranged on the first branch knot, the ground feeding point is arranged on the second branch knot, and the feeding point is communicated with the ground feeding point; the feeding point and the ground feeding point are both located in the middle of the flexible substrate in the second direction, and the first direction and the second direction are mutually orthogonal; the first branch knot and the second branch knot jointly generate resonance in a preset target frequency band, a current path on the antenna main body can be changed along with bending and folding of the flexible substrate, and the equivalent electrical length of the antenna main body can be shortened along with bending and folding of the flexible substrate. The antenna has the advantages of miniaturization and performance coexistence.

Tunable distributed oscillators (DOs) with flexible electrical length and associated systems, components, and devices are disclosed. In one aspect, a DO may include a plurality of DO units coupled in series. An individual DO unit includes a transmission-line segment having first and second ends and a middle portion between the first end and the second end. The DO unit further includes a first oscillator coupled with the first end, a second oscillator coupled with the second end, a first inductive matching circuit coupled between the first oscillator and the middle portion, and a second inductive matching circuit coupled between the second oscillator and the middle portion. By tuning the inductance or effective reactance of the first and second inductive matching circuits, the phase response of the DO unit may be adjusted so that the effective electrical length of the transmission-line segment is shortened relative to its physical length.

The utility model discloses a multifunctional microminiature constant-amplitude in-phase high-speed integrated connector, which comprises a shell, a mounting plate, N coaxial assemblies, a base, a shielding reed and a mounting screw, a shielding groove is formed in the front surface of the shell, interface mounting holes are formed in two ends of the shielding groove, a shell convex groove is formed in the middle of the shielding groove, and one end of the shell convex groove adopts large-arc transition while the other end adopts small-arc transition as a dual anti-misplug design; the mounting plate is arranged in the convex groove of the shell and is used for fixing the coaxial assembly; a shielding reed is arranged in a shielding groove of the shell; the base and the shell are connected through mounting screws to form a high-speed integrated connector; the user panel is fixed at the front end of the shell through mounting screws; coaxial contact pieces of different coaxial assemblies are connected in a bending mode through semi-rigid cables with the same physical length and the same electrical length, so that the equal-amplitude in-phase performance of the connector is guaranteed. The connector can realize transmission of multiple paths of high-speed serial differential signals or radio frequency integrated signals, and has the characteristics of integration, high density, strong shock resistance and high rate.