31 results about "Dual linear polarization" patented technology

The invention publishes a wave guide array antennas manufacture method of high gain crewel polarized or the double circular polarized, which relates to a wave guide array antennas manufacture technique in the correspondence broadcast and measure-control domain. The invention has designed the radiation level, the horizontal polarization or the circular polarization feed wave guide level, the perpendicular polarization feed wave guide level, the perpendicular polarization feed wave guide lap, the feed way of using the square or the circular waveguide resonant cavity, has solved the receive and launch of the double polarized electromagnetism signal; The horizontal polarization uses the coupling feed way and the perpendicular polarization uses the direct feed way, completes the separation of the two polarized components, simultaneously may realizes the double circular polarized work. The invention has the double polarized radiation, the high feed efficiency, compact structure, low processing cost and so on merits, is specially suitable for the manufacture of each kind of satellite communication or single control station antenna which works in the double thread polarization or double circular polarized application situations.

The invention discloses a low-profile one-dimensional active transceiving phased-array antenna for satellite communication in motion. The antenna comprises dual-linear-polarization antenna units in inclined and staggered arrangement, flat waveguide dual-channel feed networks, flat waveguide dual-channel miniaturized duplexers, waveguide transition and miniaturized TR components and miniaturized printed board power division networks. The units of the phased-array antenna are dual-linear-polarization waveguide radiators in triangularly inclined and rear-staggered arrangement, so that the antenna is low. By the aid of a method of sharing the same aperture for horizontal polarization and vertical polarization, aperture utilization efficiency of the antenna is increased, a flat waveguide feedback mode is adopted for both horizontal polarization and vertical polarization, loss of the feed networks is reduced, and quite high antenna efficiency is achieved. After passing through the antenna units, the feed networks and the duplexers, dual-polarization signals are subjected to polarization adjustment via polarization adjustment modules in the TR components and are synthesized via pitching surface networks so as to achieve a transceiving function of radio-frequency signals.

The invention relates to a broadband dual-linear polarization cone chopping groove antenna; a cone chopping groove radiating paste with a parasitic element and an inclined side is established; a series of metallic via holes are arranged at outline edges of the index line of the cone chopping groove antenna and a feed microstrip line; moreover, two linear polarized cone chopping groove antenna units are aligned according to T-shaped structure with disconnected middle part, so as to form a dual-line polarized antenna. The broadband dual-linear polarization cone chopping groove antenna has the property of wide wave beam of the broadband, and can eliminate the standing wave distorted point caused by resonance in scanning the wide angle of the broadband.

The invention discloses a broadband multi-polarized reconfigurable slot antenna and a polarization method therefor. The broadband multi-polarized reconfigurable slot antenna comprises four layers of dielectric substrates, wherein an elliptical metal patch is arranged on the lower surface of the first layer of dielectric substrate; a first feed structure is arranged on the upper surface of the second layer of dielectric substrate; a metal layer is arranged on the upper surface of the third layer of dielectric substrate; a quasi-cross-shaped slot is formed in the metal layer; a second feed structure is arranged on the upper surface of the fourth layer of dielectric substrate; and a reconfigurable wilkinson power divider is arranged on the lower surface of the fourth layer of dielectric substrate. The linear polarization radiation state with ultrahigh port isolation in two vertical directions can be achieved through a quasi-cross-shaped slot antenna fed through the first feed structure and the second feed structure; the wilkinson power divider conducts different paths through pin diodes and is connected with the first feed structure and the second feed structure through a plated through hole, so that five different antenna polarization modes of -45-degree linear polarization, 45-degree linear polarization, +/-45-degree dual-linear polarization, left-hand circular polarization andright-hand circular polarization can be achieved, the relative bandwidth is close to 20%, and the broadband multi-polarized reconfigurable slot antenna fully adapts to different work requirements.

The invention discloses a dual linear polarization radar system. The dual linear polarization radar system comprise a data base module, a strong storm preprocessing module, a data matching and identification module, a strong storm processing module, a data correction module and a strong storm early-warning module. Time and space synchronization of a large-scale or specific-region weather system and collaborative observation of a fine structure are achieved by utilizing an efficient communication network application satellite navigation system adaptive to a weather radar network through an application of radar networking. High-definition GIS information and the collaborative observation are combined, quantitative time and space consistency of networking radar observation is achieved, and abilities to monitor and early warn disastrous weather such as strong rain are improved. The invention further provides a corresponding measurement method for the strong rain on a plateau by utilizing a dual linear polarization radar system network.

The invention discloses a combined dual-linearly-polarized array antenna, which comprises a horizontal polarized array antenna (1) and a vertical polarized array antenna (2) and is characterized in that the horizontal polarized array antenna (1) and the vertical polarized array antenna (2) use the same aerial radiation port surface; the horizontal polarized array antenna (1) is an array formed byarranging M-numbered horizontal polarized linear array units (3), wherein M is a natural number; the vertical polarized array antenna (2) is an array formed by arranging (M-1)-numbered vertical polarized linear array units (4); and the horizontal polarized linear array units (3) and the vertical polarized linear array units (4) are in a radial arrangement array mode. The antenna device has the advantages that aperture use ratio and antenna efficiency are high and good phased array scan is achieved. The invention is suitable for manufacturing dual-linearly-polarized array antennas in satellitecommunication or other communication systems, especially linear polarized array antennas or phased array antennas which are dual-linear polarization or have an adjustable polarizing angle.

The invention belongs to the field of antenna technology, and discloses a small ultra-wide beam cavity-backed two-layer microstrip antenna and a wide-angle scanning array thereof. A parasitic dielectric substrate is located on the upper layer of the small ultra-wide beam cavity-backed two-layer microstrip antenna; a metal back cavity is located at the lowermost layer of the small ultra-wide beam cavity-backed two-layer microstrip antenna; and the metal back cavity is a metal cavity in a rectangular form, which closely surrounds a radiation medium substrate and the parasitic dielectric substrate. The invention adopts single point feed to radiate linearly polarized electromagnetic wave. Since the circular microstrip patch is of a small size and a compact structure, the side length of the whole antenna is less than 0.46[lambda]; the antenna thickness is less than 0.16[lambda]; the antenna impedance bandwidth is more than 14%; and the E-plane half-power beam width can reach 190 degrees. For a multi-element linear array assembled by the antenna, the space between elements is less than 0.44[lambda], and the gain is only reduced by 3dB in the scanning range of the E-plane +/- 82 degrees.The invention may also constitute an operating mode of dual-linear polarization and circular polarization.

A diversified planar phased array antenna includes a dielectric plate, at least two antenna units, at least one first micro-strip line and a ground layer. Two antenna units formed on the dielectric are coplanar and are connected perpendicular together by the first micro-strip line to form one with vertical field polarization and one with horizontal polarization. Each antenna unit is composed of at least two identical meander line antennas which have unique dual linear polarization property and at least one second micro-strip line connected to the at least two meander line antennas. The first micro-strip line is connected to at least two second micro-strip lines of the two antenna units. Therefore, the planar phased array antenna meets the requirements for spatial diversity, polarization diversity, radiation diversity and frequency diversity, etc. Each antenna unit can be formed by different number of meander line antennas which is determined to be the best for a specific application.

A 180° hybrid coupler includes three coupled-line couplers connected between two inputs and two outputs. Each of the three coupled-line couplers is defined by at least one ground conductor and only two signal conductors.

The invention provides a satellite signal capturing system and a capturing method of a bilinear polarized antenna. The system comprises an antenna module, a radio frequency module and a baseband signal processing module. The antenna module is used for radiating and receiving an electromagnetic wave signal. The antenna module comprises a vertical polarization antenna, a horizontal polarization antenna, a first band-pass filter corresponding to the vertical polarization antenna and a second band-pass filter corresponding to the horizontal polarization antenna. The radio frequency module is used for generating an intermediate frequency signal. The baseband signal processing module is used for generating a digital signal according to the intermediate frequency signal and analyzing the intermediate frequency signal into a navigation signal. The antenna module is connected with the radio frequency module. The radio frequency module is connected with the baseband signal processing module. According to the invention, the signal to noise ratio of a one-way signal can be improved effectively, the signal capturing speed of a receiver is increased, and rapid positioning is realized.

A waveguide device comprises a first circular waveguide segment (CWS) that imparts a 3λ/8 relative phase shift to two orthogonal linearly polarized signals, and a second CWS that imparts a λ/8 relative phase shift to two orthogonal linearly polarized signals. A waveguide assembly (WGA) comprises the first CWS disposed coaxially adjacent to the second CWS. A source may provide dual linear polarized energy into the WGA. In a first mode, the first CWS is axially orientated relative to the second CWS, such that the first CWS polarization is offset by 90° degrees with respect to the second CWS polarization. The radiation source polarization may be offset by 45° relative to the first CWS polarization and the second CWS polarization. In a second mode, the first CWS may be orientated with respect to the second CWS, such that the first CWS polarization and the second CWS polarization are substantially the same.

The invention discloses a ground hail shooting identification and early warning method based on a dual linear polarization radar. The method comprises the steps of: building a training sample through the observation data of a dual linear polarization radar, fitting a statistical sample through two-dimensional Gaussian distribution and one-dimensional normal distribution, building a model of ZH-ZDR, LKDP and a cross correlation coefficient CC, calculating hail and non-hail probabilities on each radar observation distance library, interpolating sounding temperature to radar observation coordinate height, constraining hail identification by using temperature information and statistics of a probability density function of hail at vertical height, and determining corresponding severe convection three-dimensional structure information by calculating the vertical accumulated liquid water content, so as to judge whether hail exists at a corresponding position. Ground hail shooting can be clearly judged, and information is provided for a predictor to issue early warning in combination with an early warning preset condition.

The invention discloses a non-array aperture antenna wave beam tilt electronic antenna and an implementation method thereof. The non-array aperture antenna wave beam tilt electronic antenna comprises an aperture antenna and a control antenna. Electric field distribution in a feed source loudspeaker aperture face is changed through an assembly structure and an excitation element antenna used for producing a tilt wave beam, aperture face antenna main wave beam tilt is achieved, and scanning of a wave beam in space is formed through a periodic excitation patch antenna. The aperture antenna is a feedforward reflector antenna. The control antenna comprises an interference antenna, a fixing ring, a fixing base and a compression plate. The polarization mode of the control antennal includes but not limited to linear polarization, dual linear polarization, circular polarization and dual circular polarization. The defects in the prior are overcome, antenna units do not need to be arrayed according to the method, and the non-array aperture antenna wave beam tilt electronic antenna has the advantages of being simple in structure, easy to implement and convenient to control.

A testing system includes: a bilinear polarized antenna for receiving and dividing a circularly polarized radio wave associating with a horizontal and a vertical polarization path of an object-to-be-tested into a first and a second high frequency signal; a phase retarder for delaying a phase of the first high frequency signal by 90 degrees to form a first high frequency signal with a phase delay of 90 degrees; a power splitter for receiving or synthesizing the first high frequency signal with the phase delay of 90 degrees and the second high frequency signal; and a high frequency signal transceiver for measuring power of the first high frequency signal with the phase delay of 90 degrees and the second high frequency signal and determining states of the horizontal and vertical polarization paths of the object-to-be-tested based on the power. Therefore, the testing system can speed up testing of the object-to-be-tested.