12results about How to "Increased Polarization Purity" patented technology

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 cylindrical vector optical fiber amplifier based on a rotary conical optical fiber. The cylindrical vector optical fiber amplifier comprises a cylindrical vector optical seed source; an isolator, a beam combiner, a rotary conical optical fiber and a cladding light pumping stripper are sequentially arranged in the column vector light transmission direction of the column vector light seed source, and a first pumping source is further welded to the input end of the beam combiner. The rotary conical optical fiber is adopted as the gain optical fiber, the stability of light polarization can be effectively kept in the cylindrical vector light amplification process, the sensitivity to temperature is reduced, and meanwhile the mode purity is improved.

The invention discloses a projector polarization intensifying system based on a PBS beam splitter prism with a 1 / 2 wave plate attached to the bottom, the projector polarization intensifying system comprises the PBS beam splitter prism and the 1 / 2 wave plate, a layer of high-precision 1 / 2 wave plate is attached to the bottom of the PBS beam splitter prism, and the thickness of the 1 / 2 wave plate enables the optical path difference between o light and e light to be just half wavelength lambda / 2. By optimizing the light path design, efficient conversion of polarized light is achieved, and the polarization purity and the output power of the projector are improved.

The invention discloses a ±45° metal cross dipole dual-polarized antenna with a reflection cavity, comprising a dustproof component, a reflection component, an antenna vibrator component, a feeding component and a support plate component. The invention has the beneficial effects of using a metal symmetrical vibrator, the radiation surface of the vibrator is composed of two pairs of butterfly arms vertically crossed at ±45°, the butterfly arms and the connecting column are provided with column holes, the feeding column is arranged in the column hole, the upper end of the feeding column is connected to the T-shaped feeding metal sheet, the lower end of the feeding column is connected to the SMA connector, so that the electrical signal is fed into the conductor from the center of the antenna, and the square flange is connected to the bottom plate, mainly to increase the contact area and improve the stability of the radiation structure, so that the dual-polarized antenna can achieve a 44.7% -10dB impedance bandwidth, and its -15dB impedance bandwidth reaches 31.5%. The device has a simple structure, a wide bandwidth, a stable structure, a high polarization purity, and good radiation characteristics, and has good application prospects, especially in base station systems.

This invention discloses a dual-substrate circularly polarized reconfigurable omnidirectional antenna based on PIN diode control. The antenna comprises a first substrate and a second substrate. The second substrate has a ground plane printed on it, and the first substrate has a radiating patch printed on it. The radiating patch includes a central square patch, a Γ-shaped stub, a loop antenna, PIN diodes, and via shorting posts. Seamless switching between left-hand and right-hand circular polarization is achieved through the on / off combinations of 16 PIN diodes, with a simple switching logic. High polarization purity is achieved in both polarization modes, and the via shorting posts effectively reduce mutual interference between modes, resulting in strong switching reliability. In both circular polarization modes, the relative impedance bandwidth and axial ratio bandwidth are wide. In the left-hand circular polarization mode, the relative impedance bandwidth reaches 19.38%, covering 2.33-2.83GHz with |S11|<-10dB, and the axial ratio bandwidth reaches 26.3%, covering 2.08-2.71GHz with AR<3dB. In the right-hand circular polarization mode, the relative impedance bandwidth reaches 19.8%, covering 2.32-2.83GHz with |S11|<-10dB, and the axial ratio bandwidth reaches 23.43%, covering 2.11-2.67GHz with AR<3dB, which is significantly better than existing narrowband designs of the same type.

The utility model relates to the technical field of micro-nano optics, in particular to a light field switching device and a light field switching and characterization system. The light field switching device comprises a laser, an optical parametric oscillator, a three-dimensional moving table, a substrate and an oil-immersed objective lens fixed on the three-dimensional moving table, the laser, the optical parametric oscillator, the three-dimensional moving table and the substrate are sequentially arranged, a metal film layer is plated on one side of the substrate, and the three-dimensional moving table is configured to bear the oil-immersed objective lens to move relative to the substrate. The three-dimensional moving table is moved to drive the oil-immersed objective lens to move, so that the relative distance between the focus of the oil-immersed objective lens and the metal film layer on the substrate is changed, the focusing degree of the exciting light is controlled, the exciting light focused by the oil-immersed objective lens and the metal film layer are subjected to different reactions, and different fields to be measured are generated. A user can quickly switch different tight focusing light fields and surface plasmon polariton fields only by adjusting the three-dimensional mobile station, and when parameters of incident light are changed, the switching device is still applicable and has high reusability.

The invention discloses a broadband dual-polarization patch antenna based on a hybrid electromagnetic coupling technology, and relates to the technical field of wireless communication. The antenna is composed of a probe, a square patch, a trapezoidal patch and a cavity. The square patch is arranged in the cavity, a feed structure is arranged below the bottom of the cavity, one end of the probe penetrates through the bottom of the cavity and is connected with the square patch, and the other end of the probe is connected with the feed structure; a square patch metal column is arranged in the center of the bottom of the square patch, the upper end of the square patch metal column is connected with the square patch, and the lower end of the square patch metal column is connected with the bottom of the cavity; the trapezoidal patch is arranged above the square patch, trapezoidal patch metal columns are arranged on the two sides of the bottom of the trapezoidal patch, the upper ends of the trapezoidal patch metal columns are connected with the trapezoidal patch, and the lower ends of the trapezoidal patch metal columns are connected with the bottom of the cavity; the cavity is a cuboid without an upper surface and surrounds the whole antenna structure; the antenna can generate + / -45-degree dual polarization, has relatively wide working bandwidth and gain, and is suitable for a base station antenna in mobile communication.

The invention discloses a wide-axial-ratio circularly polarized patch antenna based on a hybrid electromagnetic coupling technology, and relates to the technical field of wireless communication. The antenna is composed of a probe, a radiation patch, a trapezoidal patch and a cavity. The radiation patch is located in the cavity, a radiation patch metal column is arranged in the center of the bottom of the radiation patch, the upper end of the radiation patch metal column is connected with the radiation patch, and the lower end of the radiation patch metal column is connected with the bottom of the cavity; the trapezoidal patch is arranged above the radiation patch, the middle part and the tail part of the trapezoidal patch are provided with trapezoidal patch metal columns, the upper ends of the trapezoidal patch metal columns are connected with the trapezoidal patch, and the lower ends of the trapezoidal patch metal columns penetrate through the bottom of the cavity; a feed structure is arranged below the bottom of the cavity, one end of the probe penetrates through the bottom of the cavity and is connected with the radiation patch, and the other end of the probe is connected with the feed structure. The antenna has a wide axial ratio bandwidth and a high gain, is simple in structure, is easy to process, and is suitable for a base station antenna in mobile communication.

The present invention discloses a car anti-collision radar array antenna, including a four-transmit and four-receive radar chip pad, a first receiving linear antenna array, a second receiving linear antenna array, a third receiving linear antenna array, a fourth receiving linear antenna array, a first transmitting linear antenna array, a second transmitting linear antenna array, a third transmitting linear antenna array, a fourth transmitting linear antenna array, and a transmitting power division matching network. The core architecture of the present invention adopts a four-transmit and four-receive antenna array mode, and adopts six slotted corner-cut patch array elements with the same phase and amplitude as the basic unit structure, controls the size and position of the antenna parasitic unit, reasonably suppresses the antenna sidelobe level and optimizes the radiation characteristics of the antenna, and improves the impedance matching characteristics. The scheme of the present invention can realize the multi-directional detection function of the radar in the horizontal and vertical directions, and has high gain, high precision and high resolution at the same time, and can realize the millimeter wave radar system scheme for long-distance detection.

The optical fiber current transformer comprises a light source module, a polarization module, a modulation module, a double-light-path delay module, a sensing module and a signal processing module which are sequentially connected through a light path, wide-spectrum light emitted by the light source module enters the double-light-path delay module after being introduced into a modulation phase through the modulation module, a first polarization beam splitter in the double-light-path delay module separates input light into a pair of orthogonal polarized light, and the orthogonal polarized light is respectively sent into an upper branch delay optical fiber light path and a lower branch delay optical fiber light path for transmission. The second polarization beam splitter re-combines the two paths of light of the upper branch light path and the lower branch light path into one path of light signal, the light signal enters the sensing module to carry current information to be detected, the light signal is reflected by a reflecting element at the tail end of the sensing module and then returns along the original light path, interference occurs at the polarization module, and the light detector converts the interference light intensity into an electric signal to obtain the current information to be detected.

The application relates to the technical field of broadband array antennas, and particularly discloses a 6GHz-18GHz wide-angle scanning high-polarization-purity horn array antenna which comprises a metal horn body and a plurality of coaxial connectors; the metal horn body comprises two groups of symmetrically arranged side cover plates and a double-ridge cavity body; the double-ridge cavity body comprises a plurality of groups of wide-side walls connected with the two groups of side cover plates, double-ridge structures located between adjacent two groups of wide-side walls, a barret structure arranged at the bottom of the double-ridge structures and a floor plate connecting the double-ridge structures, the wide-side walls and the cover plates into an integrated whole; the application effectively realizes a broadband array with high polarization purity in a 6GHz-18GHz frequency range within a scanning range of + / -60 degrees; the cross-polarization suppression in the 6GHz-18GHz frequency band within the scanning range of + / -60 degrees is greater than 40dB, and the normal cross-polarization suppression is greater than 50dB.

This utility model discloses a circularly polarized electrically tunable antenna, including a mounting plate, a radio frequency receiver, a filter, a power divider, N phase shifter assemblies, N+1 radiating elements, and a phase adjustment mechanism. The N phase shifter assemblies are located on the front of the mounting plate, and the N+1 radiating elements are located on the back of the mounting plate. The radio frequency receiver is connected to the input of the filter, and the output of the filter is connected to the input of the power divider. One output of the power divider is connected to one radiating element, and the other outputs of the power divider are connected to the remaining N radiating elements after passing through the N phase shifter assemblies. The phase adjustment mechanism is connected to the phase adjustment sections of the N phase shifter assemblies, and is used to synchronously adjust the phase of the N phase shifter assemblies. The phase adjustment mechanism synchronously drives multiple phase shifter assemblies to achieve global phase consistency of the array. A mechanical linkage method using a transmission rod and guide block ensures the synchronicity of the adjustment actions of each phase shifter.