52 results about "Microstrip array" patented technology

The low profile antenna assembly comprises a generally rectangular frame member housing a planar antenna. A radar absorbing material is attached to the front side of the housing with a radome covering the front side of the planar antenna and attached to the frame member. The planar antenna is a microstrip array fed by a beam forming network that uses either delay lines or phase shifters to electronically steer the antenna pattern horizontally and vertically. The antenna assembly is weatherproofed, painted and flush mounted against a building surface for camouflaging the antenna assembly from observers at a distance.

The invention belongs to the technical field of millimeter wave microstrip array antenna and discloses a millimeter wave beam-shaped microstrip array antenna based on SIW and a design method thereof.The microstrip radiation layer is located on the upper surface of the upper dielectric substrate of the millimeter wave beam-shaped microstrip array antenna, The SIW feed network layer is located on the lower dielectric substrate of the millimeter-wave beam-shaped microstrip array antenna. Chebyshev synthesis and tapered microstrip gradient line are used to realize the single-side series-fed microstrip array, and the series-fed microstrip arrays are separated by the isolation band. Differential evolutionary optimization algorithm is used to beam shape the pattern. The upper surface of the SIWfeed network layer is slotted with wide edges, and the SIW feed network layer is composed of SIW-slit-Microstrip Line Coupling Structure, SIW Power Divider, SIW Phase Shifter and Cone SIW-Microstrip Line Converter. The invention realizes unequal amplitude and different phase feeding, realizes the specific shaped beam of the microstrip array antenna, and solves the problem that the traditional in-phase feeding is difficult to have the shaped beam pattern.

The invention belongs to the technical field of microstrip array antennae and particularly relates to a super-surface based variable-polarization multifunctional microstrip array antenna. The microstrip array antenna consists of a feed source and a microstrip array, wherein the feed source is arranged at a focus of the microstrip array; the feed source is a broadband Vivaldi antenna, adopts microstrip coupled feed, and consists of upper slotting metal, a middle dielectric plate and a lower microstrip line; the microstrip array consists of N*N GMS units; each GMS unit is composed of three layers of metal structures and two layers of dielectric plates; each layer of metal structure is obtained by etching CDSRRs with different rotational angles on a square patch; the upper, middle and lower structures are identical in parameter; and only the CDSRRs are clockwise rotated at an angle of 45 degrees in sequence. According to the antenna, a reflection function and a transmission function are integrated, the function switching among the reflection function, a bidirectional radiation function and the transmission function of the microstrip array is realized, and the polarization state switching between a co-polarization state and a cross-polarization state is realized. The antenna has the characteristics of high reusability, high integration level, numerous functions and the like.

The invention relates to the technical field of an antenna and particularly relates to a high isolation low cross polarization dual-polarization microstrip array antenna. The microstrip array antennacomprises a parasitic layer, a radiation layer, a dielectric layer between the parasitic layer and the radiation layer, a feeding layer and a fixing member. The microstrip array antenna is advantagedin that a high dielectric constant substrate and an H-shaped gap coupling structure are employed to improve feeding coupling efficiency, the gap size is reduced, inter-port isolation and the cross polarization level are improved, a parasitic patch is introduced to broaden impedance bandwidth of the antenna, the higher antenna gain is obtained through the 2*2 array structure, through designing therelatively sparse parallel feed network and arranging metal through holes in dense feeders, mutual coupling between the feeders is reduced, inter-port isolation is further improved, and the cross polarization level is reduced.

The invention relates to a C-band broadband circularly polarized single pulse array antenna which is suitable for the technical field of airborne communication. The C-band broadband circularly polarized single pulse array antenna specifically comprises an antenna support plate, a bottom-layer microstrip array, a radiant patch layer and an upper-layer cover plate, wherein the bottom-layer microstrip array is placed on the antenna support plate and stuck with a bottom-layer metal plate together through a conductive adhesive, the radiant patch layer is placed over the bottom-layer microstrip array and fixed on the antenna support plate, the upper-layer cover plate is fixed above the radiant patch layer, used for pressing radiant patches and fixedly connected with a side frame of the antenna support plate through screws, and the incomplete sequential rotation feed way is used for ensuring the broadband and low axis ratio properties of the antenna; and a double-layer antenna structure is adopted for expanding the gain and standing wave bandwidth of the antenna. The invention provides the circularly polarized single pulse array antenna for airborne communication, which has the advantages of low cost, high finished product rate, broad working bandwidth, low axis ratio, light weight, short processing cycle, high gain and capability of meeting the requirements of a beam and difference beam directional diagram.

An undersampled microstrip array using multilevel and space-filling shaped patch elements based on a fractal geometry achieves within the same electrical area, the same directivity than can be obtained using conventional elements as square or circular-shaped patches. However, the number of elements for the fractal-based array is less, reducing the complexity of the feeding network and overall array. Mutual coupling can be reduced avoiding radiation pattern distortions. Higher gain than that obtained using classical patch elements within the same electrical can be achieved due to the less complexity in the feeding network.

The invention relates to a method for designing a detection radar antenna of road traffic vehicle flow, which is concretely embodied by a design embodiment. The invention uses an optimized demonstration method to determine the requirements for the indexes of the detection radar antenna of the road traffic vehicle flow, points out the defects of designed antennae in the prior similar radar products, and provides a basic microstrip array antenna of a shunt feed type. Accordingly, a design scheme and a method of two microstrip array antennae of a shunt feed type are provided, and a concrete design result is provided. The method provided by the invention is proved to be capable of generating the antennae more suitable for the need of a detection radar of the vehicle flow and achieving the comprehensive aim of high performance, low price and small size.

The invention discloses a microstrip array circularly-polarized focusing antenna. The antenna comprises two dielectric substrates, antenna elements and a feed network. The two dielectric substrates are both made of FR-4 and stacked, the antenna elements is arranged on the upper surface of the upper dielectric substrate; the metal radiation patch and the feed network share a metal grounding surface, and a contact surface is provided for the two dielectric substrates; and the feed network is arranged on the lower surface of the lower dielectric substrate. The circularly-polarized focusing antenna fulfills the purpose of focusing, has good focusing effect, good circular polarization property, good matching and high transmission efficiency, achieves a good focusing effect and enhances the anti-interference performance at the same time.

The invention provides a decoupling microstrip array antenna. The decoupling microstrip array antenna comprises a microstrip dielectric plate, wherein multiple groups of microstrip arrays are arranged on the microstrip dielectric plate, the microstrip arrays are formed by connecting a plurality of microstrip patch units in series, a transmission line lattice network is arranged between adjacent groups of microstrip arrays, metal via holes are further informed in the microstrip dielectric plate, the transmission line lattice network communicates with a metal grounding layer through the metal via holes, and a feeding network communicates with a back surface of the microstrip dielectric plate through the metal via holes. In the decoupling microstrip array antenna provided by the invention, the coupling interference between array antennas is substantially reduced with the adoption of the metal via holes and transmission line lattices, and the decoupling microstrip array antenna has the advantages of high isolation, miniaturization, low profile, high grain and easiness in carrier conformality, and can be applied to the technical field of radar, remote sensing, electronic countermeasure and wireless communication systems.

A microstrip array antenna with low coupling and small spacing in the field of wireless communication technology, including: a dielectric plate, two radiation array units, a microstrip decoupling unit, a ground plate and two feeding elements, two radiation array units and a microstrip The strip decoupling units are all attached to one side of the dielectric board, the first radiating array unit and the second radiating array unit are respectively connected to the first feeding element and the second feeding element, and the two feeding elements are connected to the ground plate, The ground plate is disposed on the other side of the dielectric board. The invention uses a traditional microstrip line as a decoupling unit, which is easy to conform, has a simple structure, can better improve coupling, and has high isolation.

The invention provides an active microstrip reflective array unit. The unit comprises a rectangular patch, a dielectric substrate, a slotting floor loaded with a variable capacitor, a foam layer and a floor from top to bottom, wherein the slotting floor loaded with the variable capacitor is a metal plate opened with a slot, the variable capacitor is loaded at the middle of the slot, and the foam layer is a honeycomb flat plate made of foam material or paper. Further, the invention also provides a microstrip reflective array antenna. The antenna comprises a feeding source and a reconfigurable microstrip reflective array, wherein the feeding source is a pyramidal horn antenna, the reconfigurable microstrip reflective array comprises a plurality of active microstrip array units which are transversely, longitudinally and uniformly arranged, and the size of the slot of the slotting floor loaded with the variable capacitor of each active microstrip reflective array unit is same. The microstrip reflective array antenna provided by the invention has favorable wide-angle wave beam scanning performance, is relatively simple in structure, and has favorable performance.

The invention discloses a microstrip antenna, an array consisting of the microstrip antenna, an array set and an array set group. The microstrip antenna comprises a grounding dielectric slab, and a radiation dielectric slab vertically arranged on the grounding dielectric slab and provided with radiation elements; a metallic film and a microstrip line feed circuit connected with the radiation elements are arranged on the lower surface and the upper surface of the grounding dielectric slab respectively; and the radiation elements are lanceolate, fan-shaped, spear-shaped, heart-shaped, oval or spoon-shaped. The microstrip array is a linear array formed by the radiation elements arranged on the radiation dielectric slab by row. The microstrip array set is in a leaf mosaic structure formed by the 2-8 microstrip arrays in a manner that the radiation dielectric slabs are in parallel, the grounding dielectric slabs are in the same plane, and the radiation elements are distributed in a staggered manner. With the adoption of the microstrip antenna, the array, the array set and the array set group, the working band of a receiving antenna is widened; the radiation elements have omidirection in the plane; and the utilization ratio of microwave energy is increased.

The invention relates to a high and low frequency composite structure base station antenna loaded with an artificial magnetic conductor structure reflecting plate, and belongs to the field of wirelesscommunication. The antenna comprises a high-frequency antenna unit, a low-frequency antenna unit, a first dielectric substrate and a reflecting plate, the high-frequency antenna unit is composed of four pairwise orthogonal 4 * 4 rectangular microstrip array antennas. The low-frequency antenna unit is composed of two pairs of leaf-shaped dipole patches, two crossed and orthogonal crescent microstrip feeder lines and a rectangular feeder line bridge. The low-frequency antenna unit is coupled with the dipole patch through two orthogonal crescent microstrip feeders for feeding; the metasurface structure in the reflecting plate is formed by periodically arranging metal patches on a second dielectric substrate; the periodic structure is a rectangular patch array formed by etching four '5'-shaped gaps on a rectangular metal patch in a 6 * 6 manner. The base station antenna is simple in feeding mode, easy to realize, low in profile height and multi-frequency, and can realize 5G/4G/3G multi-system coverage.

The invention relates to a microstrip array antenna structure capable of improving isolation between antennas. The structure comprises a dielectric board; the front side of the dielectric board is provided with transmitting microstrip array antennas and receiving microstrip array antennas at intervals; the back surface of the dielectric board is a metal floor; first isolated antenna arrays and second isolated antenna arrays are introduced between the transmitting microstrip array antennas and the receiving microstrip array antennas; first metallized through holes are introduced between the transmitting microstrip array antennas and the first isolated antenna arrays; second metallized through holes are introduced between the receiving microstrip array antennas and the second isolated antenna array; and at least one circle of peripheral metallized through holes are formed along the outer sides of the transmitting microstrip array antennas and the receiving microstrip array antennas. Thefirst isolated antenna arrays and the second isolated antenna arrays are introduced between the transmitting microstrip array antennas and the receiving microstrip array antennas, so that the isolation performance is improved by 7.5dB under the condition that the distance between the transmitting and receiving antennas is unchanged, and the isolation between the transmitting and receiving antennasin a working frequency band is smaller than 70dB; and the structure is suitable to transmit and receive electromagnetic waves in a continuous wave radar system.

The invention relates to an antenna, and specifically relates to a high-gain microstrip array antenna. The high-gain microstrip array antenna comprises a metal reflection plate, a feed network is arranged above the metal reflection plate, the feed network is installed at the lower surface of a first medium plate, a slit is arranged at the upper surface of the first medium plate, a metal patch is arranged above the slit, and the metal patch is installed at the lower surface of a second medium plate; and an air layer is arranged between the metal reflection plate and the first medium plate, and an air layer is also arranged between the first medium plate and the second medium plate. The high-gain microstrip array antenna provided by the invention employs a microstrip array form, is easy to process, low in cost and simple in structure; and the product has the feature of a low profile, the distance of the reflection plate is generally one quarter of an operating wavelength, the overall thickness of the antenna is not large, and the weight is light.

The invention discloses a radio frequency front-end circuit of a detection assembly, which comprises a first input circuit, a second input circuit, a radio frequency transceiving circuit, a power division circuit and an output circuit, and is characterized in that a receiving antenna A of the first input circuit and a receiving antenna B of the second input circuit consist of microstrip array antennas at an interval of 180 degrees; the radio frequency transmit-receive circuit comprises a microwave integrated circuit, a power supply circuit, a configuration circuit, a modulation circuit and anintermediate frequency output circuit. The outputs of the power supply circuit, the configuration circuit and the modulation circuit are connected with the microwave integrated circuit; the output ofthe microwave integrated circuit is connected with the power dividing circuit, and the output of the power dividing circuit is connected with the output circuit. According to the invention, two independent input circuits and two independent output circuits are adopted; the isolation and the detection capability of the radio frequency front-end transceiving system of the detection assembly are improved, the 360-degree omnibearing panoramic detection performance of the radio frequency front end is realized, a modulation signal is generated through the modulation circuit according to the requirement of the detection assembly system, and the anti-interference capability of the radio frequency front end of the detection assembly is improved.

The invention discloses a low-coupling transceiving antenna based on a coplanar compression type electromagnetic band gap structure, and the antenna comprises a dielectric substrate, a transmitting antenna and a receiving antenna which are arranged on the dielectric substrate, a coplanar compression type electromagnetic band gap structure and a metal grounding plate, wherein the transmitting antenna and the receiving antenna are positioned on the dielectric substrate; the antenna system is a one-transmitting and two-receiving system, a transmitting antenna and a receiving antenna are both parallel-feed microstrip array antennas, the coplanar compression type electromagnetic band gap structure and the antenna are located on the same layer and located between the transmitting antenna and thereceiving antenna, and the metal grounding plate is located on the other side of the dielectric substrate. By introducing the coplanar compression type electromagnetic band gap structure, the band elimination characteristic is achieved, the common problem of mutual coupling between transmitting and receiving antennas in a radar system is greatly solved, and the method can be applied to short-range detection radars.

The invention relates to the technical field of array antennas, and discloses a novel millimeter wave anti-interference microstrip array antenna. The antenna comprises a series-fed receiving antenna array, a series-fed transmitting antenna array and a radiation unit, and the series-fed receiving antenna array and the series-fed transmitting antenna array are arranged outside an anti-interference shielding case; and the anti-interference shielding case is internally provided with a radio frequency chip, the radio frequency chip passes through a feed network and penetrates through a feed line through hole to be electrically connected with a transmitting antenna, the radiation units adopt square microstrip patches, and the radiation units are connected with one another in series to form a microstrip array. According to the invention, the absorption efficiency is formed by the plastic wave-absorbing material loaded with carbon powder, so that the mutual coupling energy of the feed network is effectively absorbed; and by covering the chip and the peripheral active circuit, the wall thickness of the radiation interference shielding case is effectively reduced to be a quarter of the working wavelength of antenna radiation, and the influence of reflection in the cavity on the feed network can be reduced.

The invention discloses a broadband large-inclination-angle low-sidelobe microstrip array antenna. The antenna comprises a first dielectric substrate; a second prepreg; a third dielectric substrate; afourth prepreg; a fifth dielectric substrate; a first metal coating layer printed on the upper surface of the first dielectric substrate; a second metal coating layer printed on the lower surface ofthe first dielectric substrate; a third metal coating layer printed on the lower surface of a second dielectric substrate; and a fourth metal coating printed on the lower surface of a third dielectricsubstrate. Compared with a traditional microstrip array antenna, a series angle feed microstrip array is adopted, metalized through holes are adopted for feeding, and the antenna has the advantages of being wide in band, compact in size, small in thickness, low in cost and the like.

A satellite-navigation anti-interference microstrip array antenna provided in the invention adopts triangular Y-shaped slot microstrip array elements. By using the antenna, miniaturization of the antenna array can be realized, cross coupling among array elements is effectively overcome and an anti-interference capability is increased. The antenna comprises N microstrip antenna array elements, a medium substrate and a metal reflection base plate. The microstrip antenna array elements are arranged on an upper surface of the medium substrate according to a certain interval. The metal reflection base plate is arranged on a lower surface of the medium substrate. Each microstrip antenna array element comprises a triangle metal radiant panel. The triangle metal radiant panel is provided with a Y-shaped slot. The Y-shaped slot comprises three bar-type slotting. Initiating terminals of the three bar-type slotting are intersected and converged and tail terminals are pointed to three edges of a triangle respectively. The triangular Y-shaped slot microstrip array elements are used for controlling flowing of a surface current and radiating a circular polarized wave. An edge of each bar-type slotting of the Y-shaped slot is provided with a coaxial feed point used for feeding in an electromagnetic wave signal.

The invention discloses a multi-beam radar for ground-like flight control of an unmanned aerial vehicle and a data fusion method. The radar comprises a radar antenna, a radar radio frequency front end, a radar signal processor, a data fusion processor, a radar antenna, a microstrip array transmitting antenna comprising at least three channels and having different wave beam orientations, and receiving antennas of at least two channels. The radar radio frequency front end transmits electromagnetic waves to at least three different directions through microstrip array transmitting antennas of at least three channels. Reflected waves after electromagnetic waves meet obstacles and are reflected are received by the receiving antennas of the at least two channels, processed by the radar signal processor respectively and fused into topographic information by the data fusion processor. The multi-beam radar antenna is adopted, the height information of the ground under the front position and in the heading forward direction and the heading backward direction can be detected at the same time, the single radar can output ground distance information in different directions at the same time, andthen the type of an operation plot is judged.