132 results about "Single polarization" patented technology

The invention relates to a sun meridian detection and course angle real-time calculation method based on polarized light field vector characteristics, and aims to solve the problems that a traditional sun meridian detection method is easily interfered in low signal-to-noise ratio scenes such as haze and cloud layer shielding, lens distortion causes polarization angle errors, the false detection rate is high, and the calculation accuracy is high. In order to solve the problems that the real-time performance and robustness of course calculation are affected due to the fact that single polarization angle information is difficult to fully reflect the sun direction, polarization parameter calculation is carried out by utilizing a multi-channel polarization image, and the sun meridian is detected by adopting Hough transform through fisheye lens correction, bilateral filtering and candidate region screening, so that the real-time performance and robustness of course calculation are improved. And a multi-point inversion method is combined to accurately obtain a sun vector and a zenith angle and an azimuth angle thereof, and finally a course angle is calculated in real time. The problems of imaging distortion and insufficient real-time processing in the traditional sun positioning technology can be effectively solved, and a powerful navigation positioning technical guarantee is provided for the fields of unmanned aerial vehicles, autonomous navigation, polarized light navigation and the like.

The present invention relates to a real-time heading angle calculation method based on the vector characteristics of the polarized light field. Aiming at the problems of traditional solar meridian detection methods, such as being easily disturbed in low signal-to-noise ratio scenarios like haze and cloud cover, the occurrence of polarization angle errors and high false detection rates caused by lens distortion, and the difficulty of using single polarization angle information to fully reflect the solar direction, which affects the real-time performance and robustness of heading calculation. This method calculates polarization parameters by using multi-channel polarization images.

The present invention relates to an antenna device and an electronic device using same, the antenna device having twice as many antennas arranged in the same area so as to be reduced in size by half and be capable of performing high power long-distance transmission. The antenna device according to the present invention comprises: a core printed circuit board having antenna circuits arranged therein; a Yagi-Uda antenna formed on a plurality of printed circuit boards arranged above the core printed circuit board, so as to transmit a single polarization signal; a monopole antenna connected to the Yagi-Uda antenna through a via; and a ground radiation unit arranged below the core printed circuit board so as to be symmetrical to the monopole antenna with respect to the core printed circuit board.

The invention relates to an intelligent detection method based on an optical fiber array, and the method comprises the steps: switching the multi-polarization-state light source input of the optical fiber array, and synchronously collecting the output polarization state parameters of each optical fiber; calculating a deviation value of the output polarization state parameter based on the polarization reference value, and when the deviation value is greater than a self-adaptive threshold value, marking the optical fiber array associated region as an abnormal region; identifying a polarization state change mode of the abnormal area, and positioning an abnormal position; generating a damage detection report through the damage confidence scoring model; according to the invention, through switching and synchronous acquisition of the multi-polarization-state light source, dynamic monitoring of the global polarization state of the optical fiber array is realized, and easy-to-omit weak signal change in single-polarization-state detection is captured; automatic marking of abnormal areas and intelligent identification and matching of polarization state change modes are achieved through comparison of the polarization deviation value and the self-adaptive threshold value, automatic classification of damage types is achieved, and the effect of improving the detection precision and reliability based on the optical fiber array is achieved.

The invention discloses a method for segmenting different strata series of stratified shale and identifying oiliness, and belongs to the field of oil-gas exploration. The invention discloses a strata division method based on XRF (X-Ray Fluorescence) mineral scanning and single polarization-fluorescence-laser confocal optical lens combined observation, which realizes accurate identification and segmentation of micron-sized strata boundaries of a layered rock core sample from different scales, and performs group component extraction on segmented independent strata. And carrying out chromatography-mass spectrometry analysis and FT-ICR MS analysis on the extracted saturated, aromatic, non-aromatic, leached and other family components. The TSF spectrum, light and heavy components, biomarker compounds, non-hydrocarbon compounds and other data obtained through the experiments are comprehensively analyzed, layering scale oiliness difference quantification and oil source comparison are achieved, and the shale oil micro-migration phenomenon is determined. The influence of the heterogeneity of the layered rock core sample on a result obtained by a traditional analysis method is overcome. According to the technology, direct evidences are provided for accurate prediction of shale oil desserts, exploration risks are reduced, and economic benefits are improved.

The utility model provides a high-integration ultra-wideband receiving and dual-polarization TR assembly. The TR assembly comprises a housing, an H polarization transmit-receive channel, a V polarization receiving channel and port assemblies connected to two sides of the housing. The H polarization transceiving channel is connected in the front cavity, the V polarization receiving channel is connected in the back cavity, the H polarization transceiving channel is used for receiving and transmitting H polarization signals, and the V polarization receiving channel is used for receiving V polarization signals. According to the utility model, ports and transmission line layout are reasonably designed, a vertical interconnection structure and a step plate technology are flexibly adopted, an ultra-wideband receiving and dual-polarization TR assembly with a doubled integration level is developed within the size of an original single-polarization TR assembly, and a receiving and dual-polarization scheme of a phased-array antenna is realized. By adopting the microwave multi-layer step plate design, the polarization isolation degree of the receiving channel is improved, the use of a glass insulator for vertical transition power supply and signal transmission is avoided, the component cost is reduced, and the subsequent assembly work is simplified.

The invention discloses a 2-bit multi-polarization reconfigurable electric control metasurface antenna which comprises a linear polarization feed source horn and a reflection type metasurface. The reflective metasurface comprises a plurality of metasurface units arranged periodically, and each metasurface unit comprises a first metal layer, a first dielectric plate, a second metal layer, a prepreg layer, a third metal layer, a second dielectric plate and a fourth metal layer which are sequentially and coaxially stacked from top to bottom. And two pairs of p-i-n diodes are integrated on each metasurface unit and are used for regulating and controlling linearly polarized waves from the feed source. According to the metasurface antenna, the radiation capacity of dual linear polarization and dual circular polarization is achieved through the single linear polarization feed source and the single reflection type metasurface at the same time, the beam scanning capacity of + / -60 degrees is achieved, and the aperture efficiency is high. In addition, a direct-current control circuit for controlling a p-i-n diode switch is designed on the back surface of the reflective metasurface, so that the integration level of the metasurface system is greatly improved. The metasurface antenna has the advantages of being simple in structure, large in polarization number, low in structural complexity and high in integration degree.

The invention discloses a synthetic aperture radar (SAR) image ground object classification method based on comparative learning and a graph network. The method comprises the following steps: segmenting an SAR amplitude image into superpixels by using simple linear iterative clustering, and sampling to obtain feature pixel points; performing continuous two-dimensional sub-band decomposition on the feature pixel points in the SAR single-view complex data based on a time-frequency analysis theory of short-time Fourier transform to obtain a change image instant spectrogram of the backscattering intensity of the target under different azimuth angles and different electromagnetic wave frequency bands; utilizing a supervised contrast learning model to train an encoder network, and extracting potential features in the time-frequency spectrogram; segmenting the feature vector of the time-frequency spectrogram by using a graph convolutional neural network model; and finally, correcting a segmentation result by using spatial neighborhood features to obtain a final ground feature classification result. According to the method, under the condition that only scattering structure features in single-polarized SAR image data are used, the high-precision classification task of ground objects in the SAR image is achieved, and the requirement for an SAR sensor by using full-polarization data is avoided.

The invention discloses a river and lake dike long time sequence vertical settlement monitoring method comprising the following steps: carrying out data preprocessing on long time sequence satellite SAR data to obtain VV and VH data or HH and HV data in a dike protection range; extracting a water body, calculating the frequency of the target area monitored as the water body, and performing permanent surface water and other surface features distinguishing on the frequency by setting a specified distinguishing value to generate a land mask; classifying VV or HH single-polarized data of different data sources and satellite incidence angles, and then extracting the vertical settlement of a dike range mask area by adopting a time sequence InSAR method based on a high-resolution DEM and stable ground actual measurement points or PS points with small settlement; correlation analysis is carried out, vertical settlement data which meet correlation conditions and are obtained based on different data sources and satellite incidence angles are fused, and vertical settlement information of the dike is obtained. According to the invention, the vertical settlement data in the river and lake dike management range can be efficiently and accurately obtained.

Disclosed in the present application are an on-chip integrated wavelength division multiplexer and a photonic integrated circuit chip. The wavelength division multiplexer comprises a polarization-insensitive flat-top wavelength division multiplexing structure, wherein the flat-top wavelength division multiplexing structure has a first input waveguide group, a second input waveguide group and an output waveguide. In the flat-top wavelength division multiplexing structure, odd-even grouping is performed on central wavelengths configured for the first input waveguide group and the second input waveguide group, optical signals of different groups are respectively input into the wavelength division multiplexer in different polarization states, and on the basis of a single polarization-insensitive flat-top wavelength division multiplexing structure, two groups of multiple optical signals of different wavelengths and in different polarization states are multiplexed into one multi-wavelength and polarization multiplexed light, thereby reducing signal crosstalk between adjacent channels, simplifying the structural complexity of the wavelength division multiplexer, reducing the size of the wavelength division multiplexer, and thus facilitating an improvement in the integration level of the photonic integrated circuit chip.

The invention discloses a polarization imaging system based on a super-structure micro-lens array and a construction method of the super-structure micro-lens array, and relates to the technical field of polarization imaging. The polarization imaging system comprises at least one refraction lens, a metasurface full Stokes polarization micro lens array and a pixel plane, and the pixel plane is formed by arranging four detector pixel arrays; the metasurface full-Stokes polarization micro-lens array is composed of a plurality of single micro-lens arrays, and a polychromatic light source focuses when incident to the refraction lens and then is transmitted to the metasurface full-Stokes polarization micro-lens array. The metasurface full Stokes polarization micro-lens array splits light in different polarization states and focuses the light to a pixel plane, and real-time polarization imaging is carried out on an object. According to the invention, the energy utilization efficiency of a single polarization is improved from 1 / 4 to 1 / 3, which has positive significance for polarization imaging and also has positive significance for function integration and volume miniaturization of an optical imaging system.

The invention discloses a sandstone slice image component identification method based on a GL-SLIC algorithm and semi-supervised learning. The method comprises the following steps: firstly, acquiring a sandstone slice image amplified by 200 times under single polarization, converting an RGB image into a CIE-Lab color space, and extracting a GLBP texture feature vector; then a GL-SLIC superpixel segmentation algorithm is constructed, and adaptive segmentation based on texture and color features is realized in combination with a Gabor filter and a local binary pattern; then implementing a region merging algorithm to generate complete mineral particles and pore fragments; finally, a classifier based on VGG16 and a discriminator based on ResNet18 are constructed, a semi-supervised self-training framework is adopted, a model is initialized by using about 6% of manual labeling samples, a high-confidence-coefficient pseudo-label extension training data set is generated through iteration, and automatic recognition of sandstone components such as quartz, pores, kaolinite, rock debris and a matrix is achieved. According to the method, the recognition accuracy of 96.3% on a test set is achieved, compared with a traditional method, the segmentation precision and the recognition accuracy are remarkably improved, the data labeling cost is greatly reduced, and an efficient technical scheme is provided for automatic analysis of geological images.

The invention discloses a broadband multi-polarization multi-beam independent regulation reflective metasurface and a design method thereof, relates to the technical field of electromagnetic metamaterials and artificial electromagnetic surfaces, and aims to solve the problem that a metasurface in the prior art generally only supports single polarization or a fixed beam direction so as to realize independent regulation of a plurality of polarization channels. According to the metasurface provided by the invention, a plurality of metasurface units form a two-dimensional array, each metasurface unit is based on a diagonally symmetrical I-shaped metasurface unit, and independent regulation and control of x polarized waves, y polarized waves, left-hand circularly polarized waves and right-hand circularly polarized waves are realized by calculating a cross polarization reflection phase and a unit rotation angle required by the position of each unit. Through phase distribution optimization design, a plurality of reflection beams with adjustable polarization channel directions can be generated in a broadband at the same time, and the antenna has remarkable advantages in anti-interference capability and system complexity reduction.

The present application relates to the technical field of coast water edge line detection, and is an island water edge line detection method based on phase consistency random walk, comprising: converting a single polarization SAR image into a phase consistency image by using a two-dimensional logarithmic Gabor filter; obtaining a sea-land membership function by using an FCM method, and creating a global sea-land priori; constructing a cross-sea bridge marker field based on LSD, and creating a marker field priori of a non-water-permeable structure connected to an island; introducing a super-pixel layer to construct a water edge line detection model; inputting the single polarization SAR image into the water edge line detection model to obtain an output label of each pixel, and realizing island water edge line detection. The present application systematically solves the problems of coherent noise interference in the single polarization SAR image, difficulty in seed point initialization of the traditional random walk method, insufficient water edge line extraction precision caused by complex island contour, and invalidity of gray scale similarity in edge detection caused by large differences in ground object backscattering, and can effectively extract the island coast line of the single polarization SAR image.

The utility model relates to the field of particle image microscopic devices, in particular to a particle size and particle shape analyzer for a particle microscopic image, which comprises a microscope and an image acquisition device, wherein the microscope comprises the following components: a light splitting seat and a light splitting chamber, a spectroscope is arranged in the light splitting chamber, a light inlet is arranged at the bottom of the light splitting seat, and the light inlet is communicated with the light splitting chamber; the single polarized light channel is horizontally arranged on one side of the light splitting seat and is communicated with the light splitting chamber; and the orthogonal polarized light channel is vertically arranged at the top of the light splitting seat and is communicated with the light splitting chamber, a light source is divided into a single polarized light path and an orthogonal polarized light path through a spectroscope, different illumination conditions are provided, and the observation requirements of different particle characteristics are met. Internal structures and textures of particles can be observed through the orthogonal polarized light channel, the single polarized light channel focuses on shape and size analysis of the particles, a cover plate is arranged at the top of the light splitting base, light splitting mirrors with different light splitting ratios can be replaced conveniently according to detection requirements, and adaptability and flexibility of the instrument are improved.

The invention discloses a middle infrared band microstructure optical fiber polarization beam splitter, the polarization beam splitter comprises a centrosymmetric cladding and two fiber cores, the cladding and the fiber cores are composed of a substrate material GaS and air holes, and the cladding is located on the outer side of the fiber cores. The cladding is composed of first air circular holes and second air circular holes, and the plurality of first air circular holes are periodically arranged in a triangular lattice structure. The fiber core is composed of a first elliptical air hole, a second elliptical air hole, a third air round hole and a fourth air round hole, and the fiber core is located between the first elliptical air hole and the second elliptical air hole and is a solid core filled with a GaS substrate material. The length of the micro-structure optical fiber polarization beam splitter of the middle-infrared band is only 40 microns, and the extinction ratio at the wavelength of 4.42 microns can reach-70 dB; and single polarization output can be realized in a range of 4.29 [mu] m to 4.59 [mu] m. The device has the advantages of small size, high extinction ratio, large bandwidth and the like, adopts a single material, effectively reduces the manufacturing difficulty of the device, is easy to integrate and miniaturize, and has potential application value in the fields of mid-infrared optical fiber sensing, mid-infrared band communication, mid-infrared band environment detection, optical nonlinearity and the like.

An antenna, an antenna device and a communication base station belong to the technical field of antennas and aim to reduce coupling among multi-band signals, the antenna is configured to radiate a signal of a first band and comprises at least one single-polarized radiator, and the single-polarized radiator comprises a radiation structure and a plurality of radiation structures, comprising a first dielectric substrate and a radiation arm located on one side of the first dielectric substrate, the radiation arm comprises a plurality of radiation branches, and the plurality of radiation branches are sequentially connected to form a ring; the feed structure is connected with the radiation structure and is configured to feed an electric signal into the radiation structure; and the filtering structure is at least loaded between the radiation branches and is configured to weaken the influence of the antenna on a signal of a second frequency band, and no overlapped frequency band exists between the second frequency band and the first frequency band.

The utility model discloses a single-polarized oscillator with the frequency of 1710 MHz to 2700 MHz, and relates to the technical field of antennas for communication. The single-polarized oscillator comprises a dielectric layer, the left side and the right side of the upper surface of the dielectric layer are respectively provided with a radiation metal layer, the lower surface of the dielectric layer is provided with a back matching metal layer, and the coaxial cable is located on the lower side of the oscillator body. A metalized coaxial cable passing hole penetrating through the oscillator body is formed in the inner side of one radiation metal layer, and a part of the braid layer on the upper portion of the coaxial cable is exposed, so that the part, exposed out of the braid layer, of the upper portion of the coaxial cable penetrates through the coaxial cable passing hole. And the braided layer of the coaxial cable is welded and connected with the radiation metal layer at the side through the coaxial cable passing hole, a cable core at the end part of the coaxial cable is exposed, and the cable core is welded and connected with the other radiation metal layer. The single-polarized oscillator has the advantages of being simple in structure, easy to implement, low in cost and the like.

The application provides a long-wave band PolInSAR under-forest terrain inversion method and equipment based on non-penetration depth correction, acquires two scenes of full polarization SAR image data and pre-processes, generates a polarization interference covariance matrix; carries out white processing on the polarization interference covariance matrix, applies a normal matrix constraint, acquires an optimal normal matrix approximate solution, extracts two end point complex coherence coefficients of a coherent line segment; based on a polarization coherence scattering model, solves model parameters by using the end point complex coherence coefficients, including a ground surface phase, a forest height, an extinction coefficient and a ground body amplitude ratio; combines sparse LiDAR height data, calculates the non-penetration depth between the forest height and the RVoG inversion terrain and the LiDAR reference terrain, constructs a one-dimensional look-up table based on the mapping relationship between the forest height and the non-penetration depth; and corrects the under-forest terrain height deviation of the PolInSAR inversion according to the one-dimensional look-up table. The application can significantly improve the precision of the ground surface terrain inversion in the forest area, and can realize large-scale under-forest terrain mapping by only relying on a single polarization interference.

The invention provides an integratable wide spectrum dense channel WSS based on a liquid crystal spatial light modulator, and the method comprises the steps: taking an axial symmetry AWG array as an input port / output port of the WSS, carrying out the dispersion of an input WDM signal, and carrying out the wave combination of an output optical signal; the polarization control module is used for converting the WDM signal into two beams of linearly polarized light in a single polarization state; the grating is used for dispersing linearly polarized light in the WDM signal along the x direction; the lens group is used for realizing polarization multiplexing in an x-z plane, converting offset of different angles into off-axis displacement to realize angle-space displacement conversion, and controlling the spot size through a 1: 1 4f system in a y-z plane; the spatial light modulator is used for carrying out pure phase wavefront modulation on optical signals, so that light with different wavelengths deflects at different angles in the x direction and returns along the same path in the y direction, and the problem that it is difficult for a WSS of a liquid crystal spatial light modulator to simultaneously achieve a wide working frequency spectrum covering a communication waveband and ultra-dense channel intervals lower than 50 GHz is solved.

Apparatuses and methods for a dual-pol antenna for increasing panel gain from limited aperture area for massive MIMO base station in a wireless communication system. A method of a base station (BS) in a wireless communication system includes transmitting polarized electro-magnetic (EM) waves in a direction of a Z-axis via an antenna panel comprising at least one dual polarized antenna and at least one three-dimensional (3D) end-fire antenna, wherein: the at least one dual polarized antenna includes a set of dual polarized antenna elements, at least one individual single polarized antenna element being configured based on a staggered configuration to form the set of dual polarized antenna elements; and the at least one 3D end-fire antenna is configured based on the set of dual polarized antenna elements, the 3D end-fire antenna being oriented in a direction of the Z-axis.

Disclosed in the present application are an on-chip integrated wavelength division multiplexer and a photonic integrated circuit chip. The wavelength division multiplexer comprises a polarization-insensitive flat-top wavelength division multiplexing structure, wherein the flat-top wavelength division multiplexing structure has a first input waveguide group, a second input waveguide group and an output waveguide. In the flat-top wavelength division multiplexing structure, odd-even grouping is performed on central wavelengths configured for the first input waveguide group and the second input waveguide group, optical signals of different groups are respectively input into the wavelength division multiplexer in different polarization states, and on the basis of a single polarization-insensitive flat-top wavelength division multiplexing structure, two groups of multiple optical signals of different wavelengths and in different polarization states are multiplexed into one multi-wavelength and polarization multiplexed light, thereby reducing signal crosstalk between adjacent channels, simplifying the structural complexity of the wavelength division multiplexer, reducing the size of the wavelength division multiplexer, and thus facilitating an improvement in the integration level of the photonic integrated circuit chip.

The application discloses a compact dual-polarized end-fire dielectric resonator antenna for a millimeter wave terminal, and particularly relates to the technical field of millimeter wave communication, and solves the technical problem that although in the millimeter wave frequency band, a dielectric resonator antenna has the advantages of small volume, high design freedom and low loss; however, the current millimeter wave end-fire dielectric resonator antenna is limited to single-polarized radiation; and the dielectric resonator antenna cannot be fully utilized while high integration is achieved; the technical scheme is that two orthogonal dielectric resonator modes of vertical polarization and horizontal polarization are adopted to work, and two polarizations share the same structure; the application can realize dual-polarized coverage, end-fire beam scanning in the millimeter wave frequency band, and has the excellent characteristics of low profile and small planar size.

The application discloses a multi-light-path projection device, a three-dimensional measurement system and a method, and relates to the field of three-dimensional measurement technology.The multi-light-path projection device comprises a uniform light source module, which is used for emitting a collimated light source with uniform light field distribution containing multiple colors; a light source modulation module, which is used for modulating the light source emitted by the uniform light source module, so that the light source contains a set projection pattern and the light source is decomposed into two beams of polarized light with different phases, and the two beams of polarized light are subjected to time sequence control; and a projection module, which comprises a plurality of pairs of projection outlets, each of which is used for projecting a light source with a single polarization state, the light sources projected by each pair of projection outlets are of the same color and different polarization states; and the positions of all the projection outlets are matched with each other, so that the areas projected by all the projection outlets are coincident.The light path structure of the projector is matched with the time sequence control of the light source and the reflective microcrystal projection chip, so that high-overlapping, multi-directional projection and real-time output of three-dimensional point cloud information and two-dimensional color images can be realized.

The invention discloses a small-sized polarization three-dimensional imaging method and device in a complex illumination environment, and the method comprises the steps: constructing a small-sized polarization three-dimensional imaging device and a measurement model in the complex illumination environment, enabling a visible light camera and a polarization camera to be coaxially designed, and synchronously achieving the spatial single polarization and stereoscopic vision, namely, two types of new three-dimensional imaging modes; through polarization three-dimensional dense reconstruction and stereoscopic vision reconstruction data, the azimuth ambiguity in the polarization dense reconstruction process is removed and the zenith angle is corrected through re-projection error minimization, so that the polarization three-dimensional reconstruction precision is improved; the polarized three-dimensional dense point cloud is converted to a camera coordinate system based on stereoscopic vision reconstruction three-dimensional point cloud, and accurate data is provided for three-dimensional reconstruction or pose measurement and other applications. The method is suitable for realizing small-sized polarization three-dimensional imaging in a complex illumination environment, has the advantages of interference resistance, high precision, high speed and the like, and has important significance in ensuring three-dimensional dense imaging, positioning / attitude determination and the like in the fields of aerospace and the like in the complex illumination environment.

The invention discloses a rock slice particle video segmentation method, a related method and a related device, and the method comprises the steps: merging the obtained to-be-recognized multi-channel rock slice sequence image data into a video, and obtaining to-be-recognized rock slice video data; the multi-channel rock slice sequence image data to be identified comprises a single polarized light image and a plurality of orthogonal polarized light images; inputting the rock slice video data to be identified into a rock particle segmentation model to obtain a plurality of masks; performing similarity calculation based on the masks to obtain a rock slice particle segmentation result; wherein the rock particle segmentation model is obtained by the following steps: collecting sequence image data of orthogonal polarized light at multiple angles from each rock slice image in an obtained rock slice image data set, and merging the sequence image data into a video to obtain a rock slice video data set; and training a preset rock particle segmentation model based on the rock slice video data set to obtain the rock particle segmentation model.

The application discloses a small-sized broadband dual-frequency dual-polarized nested co-caliber antenna unit and belongs to the technical field of electromagnetic field antenna design. The antenna comprises an L-wave dual-polarized antenna module and an S-wave dual-polarized antenna module; four S-wave dual-polarized antenna modules are evenly distributed around the L-wave dual-polarized antenna module as parasitic units; the L-wave dual-polarized antenna module is located at the center of the antenna unit and comprises two cross-orthogonal single-polarized microstrip dipole antennas; the cross-arrangement mode divides the antenna unit into four areas; and the four S-wave dual-polarized antenna modules are evenly distributed at the central positions of the four areas as parasitic units. The application effectively realizes the axial symmetry of the L-wave and S-wave dual-polarized radiation unit patterns and the consistency of the phase centers, guarantees the high isolation of the dual-frequency dual-polarization, and provides a basis for the lightweight and integrated design of the large-caliber dual-frequency dual-polarized antenna.

The utility model discloses a single-polarized ceiling antenna, and relates to the field of ceiling antennas. The single-polarized ceiling antenna comprises a ceiling antenna main body, a protective cover is arranged outside the ceiling antenna main body, an installation mechanism is arranged outside the ceiling antenna main body, the installation mechanism comprises an installation plate which is arranged inside the protective cover, and an insertion block is movably inserted into the ceiling antenna main body. And the moving block is movably arranged in the ceiling antenna main body, the moving block is movably inserted into the inserting block, and the moving block fixes the position of the protective cover. According to the single-polarized ceiling antenna, the fixing structure is arranged at the inner groove above the ceiling antenna main body, and the fixing of the protective cover can be relieved by moving the limiting block and the moving block, so that the difficulty of dismounting the protective cover is reduced under the condition that the normal use of the ceiling antenna main body is not influenced; a fixing structure between the protective cover and the ceiling antenna main body cannot be damaged in the dismounting and mounting process, and the ceiling antenna main body is kept to be attached to the surface of a ceiling.

The application provides a small-size ultra-wideband wall-hanging antenna with high stability, and specifically relates to a single-polarization directional wall-hanging antenna, which is vertically polarized and comprises a first radiating vibrator, a second radiating vibrator, a first coupling sheet, a second coupling sheet, a third coupling sheet, an antenna cover, a cable feeder and a reflecting plate. The first radiating vibrator and the second radiating vibrator form an asymmetric antenna dipole radiator, and the first coupling sheet and the leftmost part of the second radiating vibrator form an asymmetric structure. The second coupling sheet and the third coupling sheet are separately arranged on the left and right sides of the included angle formed by the first radiating vibrator and the second radiating vibrator. The technical scheme improves the feeding mode and feeding process of the existing wall-hanging antenna on the market, greatly reduces the production cost of the antenna, has the characteristics of low intermodulation, ultra-wideband, simple structure, low cost, stable electrical performance and the like, and can be perfectly applied to a mobile communication system with directional coverage requirements.

This invention provides a dual-polarized butterfly slot antenna, comprising a radiating component, a reflecting component, and a cavity component. The dual-polarized butterfly slot antenna has mutually perpendicular length, width, and height directions. The radiating component and the reflecting component are arranged parallel to each other along the height direction. Projections along the height direction onto the same plane perpendicular to the height direction are made, with the projection of the radiating component located within the projection of the reflecting component. A cavity component is fixedly connected to each end of the reflecting component along the width direction, and each cavity component extends along the height direction towards the radiating component. The side of each cavity component away from the reflecting component is engaged with the radiating component. The radiating component includes two single-polarized units, each with a butterfly slot. The technical solution provided by this invention can solve the problems of complex structure, difficulty in assembly and production, and low radiation gain in existing dual-polarized antennas.