31 results about "Microstrip slot antenna" patented technology

The invention discloses a dual-polarized microstrip slot antenna for an LTE frequency band. The antenna comprises a metal reflection plate, a first PCB dielectric substrate and a second PCB dielectric substrate, wherein the top surface and the bottom surface of the first PCB dielectric substrate and the top surface of the second PCB dielectric substrate are all coated with copper layers; the copper layer on the top surface of the first PCB dielectric substrate is at least provided with two groups of mutually orthogonal coupling slots used for radiating electromagnetic waves; the copper layer on the bottom surface of the first PCB dielectric substrate is at least provided with two groups of mutually orthogonal feed circuits used for exciting mutually orthogonal electric fields; and the copper layer on the top surface of the second PCB dielectric substrate is provided with a metal radiation patch used for coupling the electromagnetic waves from the coupling slots and generating parasitic radiation. By implementing the dual-polarized microstrip slot antenna for the LTE frequency band, a radiation unit and the feed circuits are integrated, so that the antenna is small in volume, low in profile, high in isolation degree and easy to integrate, and can cover the whole LTE frequency band.

The invention discloses a broadband circular polarization high-gain low-profile micro-strip slot antenna capable of loading a hyper-surface; the broadband circular polarization high-gain low-profile micro-strip slot antenna can realize circular polarization radiation at a frequency band being 5.1-6.3GHz. The broadband circular polarization high-gain low-profile microstrip slot antenna sequencially comprises an upper-layer dielectric substrate (2), a metal copper grounding plate (3) with a seam, and a lower-layer dielectric substrate (4) which are in tight contact from top to bottom, wherein a metal paster set (1) is arranged on the upper surface of the upper-layer dielectric substrate (2); the lower surface of the lower-layer dielectric substrate (4) is provided with a coplanar waveguide feeding structure (5). According to the broadband circular polarization high-gain low-profile microstrip slot antenna, the metal paster set and the upper-layer dielectric substrate form a hyper-surface structure, so that conversion from linear polarized waves to circular polarized waves is realized; the coplanar waveguide feeding structure and the metal copper grounding plate jointly form a coplanar waveguide with a floor for feeding to the antenna from a signal conduction band. A hyper-surface loading technology is adopted based on the micro-band seam antenna, and the coplanar waveguide is utilized for feeding, so that the antenna has the advantages of circular polarization characteristic, high gain and low profile within a broadband, is simple in structure, and is convenient to process.

The invention relates to the technical field of an antenna in a communication system integrated design, especially relates to a frequency reconfigurable microstrip antenna design, and specifically relates to a miniaturized frequency reconfigurable microstrip slit antenna, for solving the technical problems of too many wireless communication system antennas and low radio frequency front-end integration in the prior art. The miniaturized frequency reconfigurable microstrip slit antenna comprises three layers, an upper layer is provided with a microstrip feed line, an intermediate layer is provided with a medium substrate, and the lower layer is provided with a ground plate. The ground plate etches two L-shaped open circuit slits and one U-shaped open circuit slit, and all the slits are bilaterally symmetrical about the center of the ground plate. In order to realize frequency reconfiguration, one PIN diode is respectively loaded in each slit, and the antenna generates four work modes through controlling different combination states of the diodes. The miniaturized frequency reconfigurable microstrip slit antenna can work over a 2.3GHz frequency range of a fourth mobile communication system, a 4.4GHz frequency range of an aviation mobile remote measurement system and a 5.8GHz frequency range of a wireless local area network, is simple in structure, low in cost and good in reliability, and meets the requirements for compactness and high integration of a wireless communication system.

The invention discloses an ultra-high-frequency sensor for monitoring partial discharge in a switch cabinet online. The ultra-high-frequency sensor comprises a micro-strip slot antenna and an SMA (Sub-Miniature A) connector, wherein the micro-strip slot antenna comprises a dielectric substrate, wherein a grooved metal grounding plate is arranged on one side of the dielectric substrate, and the micro-strip slot antenna is arranged on the opposite side of the dielectric substrate; the SMA connector is electrically connected with the micro-strip slot antenna. From an overall perspective, the shape of the groove in the metal grounding plate is an inverted U shape; a detail design adopts a meander technology, and the path of exciting current on the surface of the metal grounding plate is changed by bending, so that the miniaturization of an antenna is realized. In application, the ultra-high-frequency sensor is light in weight, small in size and easy to manufacture, and is beneficial to be arranged in the switch cabinet; meanwhile, the sensitivity is high; a feed structure is simple and compact; the loss of a feed line is low. Simulation and experiments prove that the return loss of the sensor in a bandwidth range is less than -10 dB; in addition, the impedance matching with a standard 50-Ohm coaxial transmission line is effectively realized by optimizing micro-strip feed line parameters and feed positions.

The invention discloses a microstrip slot antenna with reconfigurable directional diagrams. The microstrip slot antenna comprises a three-layer structure including a dielectric substrate, a feed network and an earth plate, wherein a top layer of the dielectric substrate is the feed network, and a bottom layer of the dielectric substrate is the earth plate; the earth plate comprises four radiationslot units which are in rotary symmetry and are mutually separated and four rectangular slots formed in the tail ends of the radiation slot units; the feed network comprises a square microstrip patch,a switch, four L-shaped microstrip coupling branches and low-pass filters; the four L-shaped microstrip coupling branches are connected to four sides of the square microstrip patch through switches;one low-pass filter is arranged at the tail end of each L-shaped microstrip coupling branch and is a switch bias circuit; the low-pass filters are used for controlling conduction and disconnection ofthe switches and changing a work mode of an antenna. The microstrip slot antenna disclosed by the invention meets the requirements of small size, compact structure and wider bandwidth and can realizethe reconfigurability of four directional diagrams on the horizontal plane at the same time.

The invention discloses a CPW (Co-Planar Waveguide) feeding broadband circular polarization antenna. The antenna comprises a dielectric substrate, elliptic grooves and a coplanar integrated waveguide feeder; the elliptic grooves are formed on the dielectric substrate; and the coplanar integrated waveguide feeder is arranged in the elliptic grooves, wherein the two elliptic grooves are of a symmetrical structure. The CPW feeding broadband circular polarization antenna has an actually measured impedance bandwidth of about 5.4GHz (which is 112.5 percent relative to a center frequency) and has a 3dB axial ratio bandwidth of 5.5GHz (which is 109 percent relative to the center frequency); and the impedance and axial ratio bandwidth of the CPW feeding broadband circular polarization antenna are greater than those of a currently disclosed single-feeding circular polarization microstrip slot antenna. Moreover, the CPW feeding broadband circular polarization antenna has the bidirectional radiation characteristic and respectively radiates right-hand circular polarized waves and left-hand circular polarized waves in the +z and -z directions.

The invention discloses a tri-band filter micro-strip slit antenna comprising a dielectric substrate, and a group formed on the dielectric substrate and including an input port, a cross-shaped resonator, a first open-circuit resonator with a half wavelength, a second open-circuit resonator with a half wavelength, and a slotted floor with a slit, wherein the first open-circuit resonator and the second open-circuit resonator are loaded on the slit of the slotted floor to obtain tri-band radiation characteristics. The feeder line of the input port is loaded on the cross-shaped resonator. The cross-shaped resonator excites the slit on the slotted floor to obtain a tri-band filtering effect. The tri-band filter micro-strip slit antenna can realize good filtering and radiation characteristics, and has flexible design, a low profile, low cost and high selectivity.

The invention discloses a micro-strip slot antenna based on the resonant tunneling mechanism and belongs to the field of antennae. The antenna comprises a round patch antenna body provided with an H-shaped slot, and a resonant tunneling diode (RTD), wherein the RTD serves as an exciting device and is used for generating terahertz (THz) waves, the round patch antenna body provided with the H-shaped slot serves as a transmission device and used for transmitting the THz waves generated by the RTD out, the top electrode of the RTD is connected with the round patch antenna body, and the bottom electrode of the RTD is connected with the stratum. The micro-strip slot antenna based on the resonant tunneling mechanism has great significance in fields such as super-speed data link transmission, wireless communication and military national defense.

The invention relates to a single-board microstrip slot phased-array antenna which is based on a single-board system integration technology, compact in structure and simple in beam control system. The single-board microstrip slot phased-array antenna comprises a dielectric substrate, wherein a metallic grounding plate is arranged on one surface of the dielectric substrate, at least two row-direction microstrip lines and a column-direction microstrip line are arranged on the other surface of the dielectric substrate, and equidistant slot or microstrip slot antennae are formed on the metallic grounding plate through etching along straight lines corresponding to all the row-direction microstrip lines; the column-direction microstrip line is connected with one ends of the row-direction microstrip lines respectively through direct current (DC) blocking capacitors, and the other ends of the row-direction microstrip lines are respectively connected with matched loads through DC blocking capacitors; one end of the column-direction microstrip line is connected with a matched load through a DC blocking capacitor, and the other end of the column-direction microstrip line is connected with a radio-frequency terminal through a DC blocking capacitor; and row-direction barium strontium titanate (BST) strips are respectively arranged between all the row-direction microstrip lines and the dielectric substrate, and a column-direction BST strip is also arranged between the column-direction microstrip line and the dielectric substrate.

The invention relates to a non-refrigeration millimeter-wave/infrared lamination detector which includes a microstrip antenna, a non-refrigeration detector element and a readout circuit. The microstrip antenna is bonded on the back of the non-refrigeration detector element through an adhesive. The front face of the non-refrigeration detector element is connected with the readout circuit through connection columns. One face of an insulating dielectric substrate of the microstrip antenna is a grapheme conductive thin film, and gaps etched on the grapheme conductive thin film are distributed into an array. On the other face of the insulating dielectric substrate, a metal feed line is printed at a position corresponding to each gap in the grapheme conductive thin film. When rays which include millimeter waves and infrared radiation shoot into a double-mode detector, firstly the millimeter waves are received through the microstrip gap antenna and then incident infrared rays are received by the non-refrigeration detector element so that dual-mode lamination detection is realized.

The invention discloses a loaded resonator-based triple-frequency microstrip slot antenna. The loaded resonator-based triple-frequency microstrip slot antenna comprises a dielectric substrate and an input port, a first loaded resonator, a second loaded resonator and a floor with a slot which are manufactured on the substrate, wherein the first loaded resonator and the second loaded resonator are loaded on the slot of the floor separately to obtain the triple-frequency radiation characteristic; and the feeder line of the input port is directly loaded on the slot for exciting the slot. The loaded resonator-based triple-frequency microstrip slot antenna can realize high radiation characteristic and can satisfy multi-frequency working requirement, and has the advantages of flexible design, low profile, low cost and the like.

The invention discloses a microstrip slot antenna and signal transmission equipment, the microstrip slot antenna comprises a substrate, an antenna radiator is arranged on the front surface of the substrate, a reference ground plane is arranged on the back surface of the substrate, a bending slot is formed in the reference ground plane, and the bending slot is used for enhancing the radiation efficiency of the antenna radiator. Since the bending gap increases the current flowing path, the electromagnetic field intensity around the gap is increased, the area with high current density can be controlled in a specific area, the low-frequency radiation efficiency of the antenna is improved, and the low-frequency bandwidth of the antenna is increased. In addition, the signal transmission equipment disclosed by the invention comprises the slot antenna, and also has the above effects.

The invention discloses a medium-loaded silver-paste-free antenna for navigation and positioning, and a design and preparation method of the medium-loaded silver-paste-free antenna. The dielectric-loaded silver-paste-free antenna comprises a microstrip slot antenna and a dielectric block. The microstrip slot antenna comprises a dielectric substrate, a metal patch and a metal conduction band, wherein the metal patch and the metal conduction band are printed on the upper surface and the lower surface opposite to each other of the dielectric substrate respectively. The metal patch is provided with an annular gap coupled with the metal conduction band and two pairs of rectangular gaps symmetrically arranged with the center of the annular gap as a symmetric point. The two rectangular gaps in each pair of rectangular gaps are symmetrically arranged with the center of the annular gap as the symmetry point, one end of each rectangular gap is communicated with the outer edge of the annular gap, and the other end of each rectangular gap radiates outwards. A wide passband of the antenna is excited to cover four working frequency bands for positioning of the navigation system, and the antenna is simple and light in structure and excellent in performance, has the characteristics of low profile, low cost, wide axial ratio, low return loss, wide absolute bandwidth, stable radiation pattern and the like, and is suitable for the positioning function of the satellite navigation system.

The invention discloses a Beidou satellite navigator with multiple microstrip antennas. The Beidou satellite navigator comprises a shell, a supporting plate, a supporting frame and the three microstrip antennas. One side of the supporting plate is connected with one end of the shell through a hinge in a rotating mode, one end of the supporting frame is connected with the rear side surface of the shell in a rotating mode, a supporting groove fixing the supporting frame is formed in the upper side surface of the supporting plate, and the three microstrip antennas are arranged on the rear side surface in the shell, the upper side surface in the supporting plate and the lower side surface in the supporting plate respectively. By arranging the multiple microstrip slot antennas, the navigator has 120% of impedance bandwidth and the good radiation characteristic within the frequency coverage area, is small in size and can carry out navigation accurately in the environment that satellite signals are weak.

The invention discloses a double-layer dielectric substrate multi-frequency high-gain microstrip slot antenna. The antenna comprises two rectangular dielectric substrates which are stacked together. Four right triangle metal patches are arranged on an upper surface of an upper dielectric substrate. The four right triangle metal patches are equal in size, and right angles are oppositely spliced into a rhombus structure. A first triangular patch, a second triangular patch, a third triangular patch and a fourth triangular patch are successively arranged in an anticlockwise direction, and isosceles right triangles with the same size are cut off from right angles of the first triangular patch and the third triangular patch respectively to form two trapezoidal structures. A rectangular metal patch is arranged on an upper surface of the upper dielectric substrate of a vertical gap. A lower surface of a lower dielectric substrate covers a metal grounding plate, the metal grounding plate is provided with a rectangular gap, a circular via hole corresponding to a tail portion of the rectangular metal patch penetrates through the lower dielectric substrate, and the metal grounding plate is provided with a circular feed port corresponding to the circular via hole. In the invention, multi-frequency resonance high-gain radiation can be realized.

A double-frequency four-unit millimeter wave microstrip slot MIMO antenna comprises a rectangular dielectric substrate. Four antenna units with a same structure are arranged on an upper surface of therectangular dielectric substrate, and a metal grounding plate is laid on a lower surface of the rectangular dielectric substrate. Each antenna unit comprises a rectangular metal arm printed on the upper surface of the rectangular dielectric substrate. A short side of the rectangular metal arm is superposed with an edge of the dielectric substrate, a long side of the rectangular metal arm extendsinto the upper surface of the dielectric substrate, a T-shaped structural gap is etched in the metal grounding plate, the T-shaped structural gap is orthogonal to the rectangular metal arm, and a T-shaped head part is close to the edge of the rectangular dielectric substrate. The four antenna units are rotatably and symmetrically arranged at 90 degrees about a center of the upper surface of the rectangular dielectric substrate. By using the microstrip slot antenna structure based on a deformation slot, a millimeter wave antenna design is realized, the microstrip slot millimeter wave antenna can realize resonance at two frequency points, and an isolation degree between antenna ports of each unit is relatively high.

The invention discloses a low-profile unidirectional radiation microstrip slot antenna array which comprises a dielectric substrate, an antenna structure arranged on the upper surface of the dielectric substrate and a reflecting surface covering the lower surface of the dielectric substrate, wherein the dielectric substrate and the reflecting surface are consistent in size; the antenna structure is formed by connecting eight antenna array elements in parallel in a 2 * 4 layout; the antenna array element is a geometrically symmetrical rectangular microstrip slot antenna and is composed of two rectangular metal patches with slots in specific geometrical shapes; each slot is formed by connecting three rectangular slots which are perpendicular to one another end to end; and the geometric shapes of the slots are completely the same and are symmetrical in the antenna array element. According to the invention, in a 5.8 GHz high frequency band, the antenna obtains a unidirectional radiation characteristic and a higher gain in an arraying mode so as to prolong the propagation distance of the antenna; the microstrip slot antenna is used as an array element, so that the antenna has the characteristics of low profile and miniaturization.

A double-frequency high-gain microstrip slot antenna loaded with a bowknot type parasitic structure comprises a first dielectric substrate and a second dielectric substrate, two triangular parasitic structures are etched on the upper surface of the first dielectric substrate and are in rotational symmetry, and a rectangular metal patch is etched on the upper surface of the second dielectric substrate. A rectangular gap and a non-metal circular structure are etched on the lower surface of the second dielectric substrate, a feed via hole is formed in the rectangular metal patch, and the radius of the non-metal circular structure is larger than that of the feed via hole and coincides with the circle center of the feed via hole. Except for the rectangular gap and the non-metal circular structure, the lower surface of the second dielectric substrate is completely covered with metal to form an antenna grounding plate. According to the invention, the working frequency point of the antenna isexpanded by using a simple parasitic structure, the far-field radiation gain of the antenna is improved, and the characteristics of the microstrip slot antenna are greatly improved.

The invention discloses a novel groove type ultra-wideband microstrip slot antenna. The novel groove type ultra-wideband microstrip slot antenna comprises a dielectric substrate and a metal groundingplate, wherein the metal grounding plate is arranged on the back surface of the dielectric substrate; an input feeder line is arranged at the right lower part of the front surface of the dielectric substrate; the metal grounding plate is provided with a groove-shaped gap which is obtained by subtracting a rectangle from a 1/2 circle. The novel groove type ultra-wideband microstrip slot antenna adopts the method of forming the groove type gap on the grounding plate to widen the bandwidth of the antenna and reduce the size of the antenna, and the bandwidth of the antenna reaches 182 percent. Thenovel groove type ultra-wideband microstrip slot antenna is simple in structure, easy to process and high in gain in a frequency band range, and is capable of suppressing the WLAN narrow-band system.

The invention relates to a dual-frequency microstrip slot antenna. A feeding mode is 50omega microstrip line feeding at the bottom. The antenna comprises a radiant metal patch located on a top layer and a ground plate metal layer located on a bottom layer; a medium layer is provided between the radiant metal patch and the ground plate metal layer. The antenna is characterized in that the radiant metal patch is a rectangular radiant metal patch with two F-shaped grooves and one H-shaped groove; and a rectangular patch with a pore-digging structure is adopted by the ground plate metal layer. Thedual-frequency microstrip slot antenna has the beneficial effects that 1, miniaturization and dual band requirements are implemented in the antenna provided by the invention; 2, a double-frequency working band is implemented because the two F-shaped grooves are used by the antenna; 3, the bandwidth is broadened in the antenna through the H-shaped groove and modification of the bottom-layer groundplate; and 4, the whole antenna structure is very simple and suitable for a hand-held RFID (Radio Frequency Identification Device) reader.