10 results about "Circular loop" patented technology

The invention discloses a mode-locked laser based on cross-polarization feedback injection and a control method thereof, and belongs to the technical field of lasers, a light beam emitted by a VCSEL laser is divided into two beams through an optical splitter, the first beam is divided into a first TM mode light beam and a first TE mode light beam through a first polarization-maintaining beam splitter, the two beams form an annular loop on a light path, and the first TM mode light beam and the first TE mode light beam form an annular loop on the light path; and a half-wave plate is arranged on the loop. And the two beams of light are respectively and oppositely propagated along the annular loop, return to the VCSEL laser after being subjected to polarization state conversion by the half-wave plate, are reflected by a resonant cavity of the VCSEL laser again, are coupled into the resonant cavity after being subjected to secondary polarization state conversion by the half-wave plate, and finally finish the output of the mode-locked laser. The laser reaches a mode-locked state by adjusting the angle of the half-wave plate. The laser uses an orthogonal polarization feedback injection mechanism, does not need to use a saturable absorber and a polarization inverter, is simple in structure and easy to implement, greatly reduces the cost and complexity of a system, and meets the requirements of different application scenes.

The utility model relates to a stacked optical module packaging device, which is based on an organic substrate (2) with multiple layers of built-in wires (1), carries out system packaging design on an optical module circuit for transmitting or receiving light, and realizes stacking arrangement of devices in the optical module circuit through the internal position and the surface position of the organic substrate (2). It is guaranteed that the glazing working face of the optical working device (6) is exposed out of the external space, and the light emitting efficiency or the light receiving efficiency of the optical working device (6) to the external environment is guaranteed; a transparent material (9) is designed to cover and wrap a window (8) formed in the surface of the organic substrate (2) and an arranged device, the device is prevented from being directly exposed, the working reliability of the device is greatly improved, when the designed packaging device is started, a loop path formed by current working forms a ring, loop inductances are mutually counteracted, and the reliability of the device is improved. The loop inductance is greatly reduced, and the working performance of the packaging device can be effectively improved.

A device for door unlocking for a vehicle, having an actuating element, including an actuating portion and a flexibly unwindable band portion, which is connected to a Bowden cable. The Bowden cable and the actuating element are arranged on a base plate and / or a door, and the actuating element is connected to a rotatably arranged loop lever in such a way that, when the loop lever is rotated by the actuating element, the Bowden cable connected to the loop lever is movable. The loop lever includes a (preferably) circular loop lever portion, against which the actuating element partially abuts.

The application discloses a wave shape selection antenna, which comprises a first metal structure, a second metal structure, a wave shape selection structure and a feeding structure, the first metal structure is connected with the second metal structure, the second metal structure is connected with the wave shape selection structure, the first metal structure is realized by forming a dipole structure with a circular loop and a truncated end through a gap on a metal patch structure, and the second metal structure is realized by using a microstrip line structure; the wave shape selection antenna has the advantages that the wave shape selection planar structure is integrated with the antenna structure, the wave shape selection planar structure function and the antenna function are combined, and when the wave shape selection antenna is used in a wireless communication system, the structural complexity can be reduced.

A tension measurement and connection system for guy wires of a guyed wind measurement tower and its assembly method belong to the infrastructure technology field of the onshore wind power industry. The tension measurement and connection system is installed at the connection point between one end of the guy wire and the foundation tie rod of the guy wire reel, realizing the connection between the structural guy wire and the foundation tie rod. Simultaneously, during installation and construction, the tension of the guy wire is measured to ensure it reaches its design value, guaranteeing the safety of the entire structural system. It connects the main rod to the foundation tie rod via a U-shaped connecting rod and a circular loop, and a limiting nut secures the connecting crossbar to the U-shaped connecting rod, forming a closed-loop series structure. The guy wire is then fixed to the series structure using a clamp sleeve, a conical clamp, and clamp tightening bolts. A sensor installed on the sensor mounting bracket and the limiting nut ensure the pre-tension of the guy wire reaches its design value. This invention can simultaneously measure the pre-tension of the guy wire and connect it to the foundation tie rod of the guy wire reel, allowing the guy wire to perform its designed function and ensuring the safety of the wind measurement tower.

The application discloses a parameter acquisition method of a circular ring antenna array with equal-amplitude and in-phase patch feed, the antenna array comprises a metal ground plane and a plurality of equal-amplitude and in-phase excited antenna units arranged in a linear array on the metal ground plane, the antenna unit has a common mode port, each common mode port comprises two single ports, an active common mode reflection coefficient of the common mode port of the antenna unit is equal to half of the sum of common mode reflection coefficients of the two single ports, the common mode reflection coefficient of the single port is calculated first, and the active common mode reflection coefficient of the common mode port is indirectly obtained; the application has the advantages that the calculation process is simplified, the calculation amount is small, the time consumption is relatively short, and the application is beneficial to popularization and application in engineering practice.

The test and measurement apparatus includes an input unit that receives a non-return-to-zero (NRZ) waveform signal from a device under test, a ramp generator that generates a ramp sweep signal using the NRZ waveform signal, a gate that generates gated X-axis and Y-axis data by gating the ramp sweep signal and the NRZ waveform signal, and a display that displays the gated X-axis and Y-axis data as a circular loop image. The circular loop image generation method receives an input waveform, generates a ramp sweep signal using the input waveform, gates the ramp sweep signal and the input waveform to generate gated X-axis and Y-axis data, and displays the gated X-axis and Y-axis data as a circular loop image.

An antenna that can be placed near a window with a depth of about 100 mm and can receive broadcasts from local TV stations is composed of a combination of well-known antenna element shapes. 【Solution means】The antenna combines a double-square loop element, a circular loop element, and a gate element, which are well-known antenna element shapes, as follows. Let λ be the wavelength of the target frequency. First, a vertical rectangle with a short side of about 0.22λ and a long side of about 0.5λ is provided with a feeding segment to form a double-square loop feeding element. For the upper segment of the double-square loop element, a gate element with a side length of about 0.167λ is placed at a distance of about 0.117λ behind the direction of radio wave arrival, such that its upper side is approximately at the same height as the upper segment of the double-square loop element. A circular loop element is placed as a reflector at a distance of about 0.117λ behind the direction of radio wave arrival, such that the center of the lower square of the double-square loop element and the center of the circular loop element are at approximately the same height.

Provided are a plasma reaction device capable of cooling a reactor body and a magnetic core by circulating cooling water, and a cooling method thereof, the plasma reaction device including an annular loop space therein, and a body cooling channel therein, a magnetic core having a primary coil to generate plasma by exciting a gas in the annular loop space, a cooling block being in thermal contact with the reactor body or the magnetic core, and having a block cooling channel therein, a connecting block having a first water inlet pipe and a first water outlet pipe at a side thereof to supply cooling water at a first temperature, and having a second water inlet pipe and a second water outlet pipe at another side thereof to collect the cooling water at a second temperature higher than the first temperature, and a cooling water circulation line mounted between the connecting block, the cooling block, and the reactor body.

Device for unlocking the door (1) of a vehicle, comprising an actuating element (2) consisting of an actuating section (27) and a flexibly unwindable band section (28) which is connected to a Bowden cable (11), wherein the Bowden cable (11) and the actuating element (2) are arranged on a base plate (9) and / or a door, and the actuating element (2) is connected to a rotatably arranged loop lever (5) such that when the loop lever (5) is rotated by the actuating element (2), the Bowden cable (11) connected to the loop lever (5) is movable, characterized in that the loop lever (5) has a preferably circular loop lever section (8) on which the actuating element (2) partially rests.