392 results about "Microstrip patch antenna" patented technology

Microstrip patch antenna (46), feed structure (48), and matching circuit (50) designs for an RFID tag (10). A balanced feed design using balanced feeds coupled by a shorting stub (56) to create a virtual short between the two feeds so as to eliminate the need for physically connecting substrate to the ground plane. A dual feed structure design using a four-terminal IC can be connected to two antennas (46a,46b) resonating at different frequencies so as to provide directional and polarization diversity. A combined near/field-far/field design using a microstrip antenna providing electromagnetic coupling for far-field operation, and a looping matching circuit providing inductive coupling for near-field operation. A dual-antenna design using first and second microstrip antennas providing directional diversity when affixed to a cylindrical or conical object, and a protective superstrate (66). An annual antenna (46c) design for application to the top of a metal cylinder around a stem.

An antenna system includes a fractalized element that may be a ground counterpoise, a top-hat located load assembly, or a microstrip patch antenna having at least one element whose physical shape is at least partially defined as a first or higher iteration deterministic fractal. The resultant fractal element may rely upon an opening angle for performance, and is more compact than non-Euclidean ground counterpoise elements or the like. A vertical antenna system includes a vertical element that may also be a fractal, and a vertical antenna can include vertically spaced-apart fractal conductive and passive elements, and at least one fractal ground element. Various antenna configurations may be fabricated on opposite surfaces of a substrate, including a flexible substrate, and may be tuned by rotating elements relative to each other, and/or by varying the spaced-apart distance therebetween. Fractalized ground counterpoise elements and/or microstrip patch antenna systems may be fabricated on a flexible printed circuit substrate, and/or placed within the support mount of a cellular telephone car antenna.

A slot fed microstrip patch antenna (200) includes an electrically conducting ground plane (208), the ground plane (208) having at least one coupling slot (206) and at least a first patch radiator (209). An antenna dielectric substrate material (205) is disposed between the ground plane (208) and the first patch radiator (209), wherein at least a portion of the antenna dielectric (210) includes magnetic particles (214). A feed dielectric substrate (212) is disposed between a feed line (217) and the ground plane (208). Magnetic particles can also be used in the feed line (217) dielectric. Patch antennas according to the invention can be of a reduced size through use of high relative permittivity dielectric substrate portions, yet still be efficient through use of dielectrics including magnetic particles which permit impedance matching of dielectric medium interfaces, such as the feed line (217) into the slot (206).

This invention relates to gas insulation combination electric apparatus partial discharge online detecting and position equipment and its position method. It belongs to electric equipment insulation detecting technique field. This invention includes sensor array consisted by microtrip patch antenna, two groups multiple intelligence selecting switch; two amplify filter, high speed digital collector, computer and control module. The array in this invention is made up by the microtrip patch antennas fixed at GIS basin type insulator, its antenna is made up by rectangular metal patch, medium board, metal platter, coaxial probe type feed line and antenna shielding case. This invention is computer program control, it can online, actual time, quickly, actually poison of GIS inner discharging. This invention can be widely used to electric generator plant booster station and electric network GIS electric substation, it can auto detecting GIS inner partial discharge, and actually poison of partial discharging defect, also it can interconnection run with electric substation and electric generator plant auto monitoring system.

A ground-penetrating radar comprises a software-definable transmitter for launching pairs of widely separated and coherent continuous waves. Each pair is separated by a constant or variable different amount double-sideband suppressed carrier modulation such as 10 MHz, 20 MHz, and 30 MHz Processing suppresses the larger first interface reflection and emphasizes the smaller second, third, etc. reflections. Processing determines the electrical parameter of the natural medium adjacent to the antenna.

The modulation process may be the variable or constant frequency difference between pairs of frequencies. If a variable frequency is used in modulation, pairs of tunable resonant microstrip patch antennas (resonant microstrip patch antenna) can be used in the antenna design. If a constant frequency difference is used in the software-defined transceiver, a wide-bandwidth antenna design is used featuring a swept or stepped-frequency continuous-wave (SFCW) radar design.

The received modulation signal has a phase range that starts at 0-degrees at the transmitter antenna, which is near the first interface surface. After coherent demodulation, the first reflection is suppressed. The pair of antennas may increase suppression. Then the modulation signal phase is changed by 90-degrees and the first interface signal is measured to determine the in situ electrical parameters of the natural medium.

Deep reflections at 90-degrees and 270-degrees create maximum reflection and will be illuminated with modulation signal peaks. Quadrature detection, mixing, and down-conversion result in 0-degree and 180-degree reflections effectively dropping out in demodulation.

Method and apparatus for reducing radio frequency interference (RFI) using a dual-element patch antenna [10]. The antenna possesses two antenna elements [13, 14] having distinct radiation patterns. Either element may be independently selected using a DC bias voltage. Diodes [20] connected to the elements serve to disable one element when the other is selected. In one selected mode, a nominal radiation pattern provides a broad, hemispherical shaped sensitivity that is designed for acquiring and tracking all navigation satellites above the horizon. This nominal radiation pattern, however, is susceptible to interference that is present near or below the horizon. The second selectable radiation pattern of the dual-element antenna has comparatively higher gain toward zenith, and lower gain at and below the horizon to mitigate interference. This combination of features is packaged in a single antenna unit that can be a direct replacement for existing antennas. The dual-element antenna unit has a low vertical profile and is suitable for mounting on high-speed moving vehicles.

A dual-polarized microstrip patch antenna structure comprising: a dual microstrip feed line circuitry underneath a bottom dielectric substrate; a ground plane layer overlying the bottom dielectric substrate, the ground plane layer having coupling apertures etched to the ground plane layer; a middle metallized patch layer stacked over a middle dielectric substrate; a top metallized patch layer stacked underneath a top dielectric substrate; and an air layer between the middle dielectric substrate and the top dielectric substrate separating the middle metallized patch layer and the top metallized patch layer. The microstrip feed line circuitry is configured to utilize corner-feeding techniques for enabling diagonal modes of the patch layers, and the coupling apertures of the ground plane layer are provided with a non-resonant bow-tie shape for enabling aperture coupling between the microstrip feed line circuitry and the patch layers.

A microstrip patch antenna comprises a patch antenna element comprising a first conductive layer; dual probe feeds separate from each other and spaced from and field coupled to the patch antenna element for transmitting or receiving RF signals, each of the dual probe feeds having a conductor segment and a deltoid shaped conductive strip orthogonal to the conductor segment; the deltoid shaped conductive strips being coplanar; and a first dielectric material layer separating the first conductive layer and the coplanar deltoid shaped conductive strips.

A microstrip antenna configuration employs a metallic patch which is positioned on the top surface of a dielectric substrate. The dielectric substrate has the bottom surface coated with a suitable metal to form a ground plane. A hole is formed through the ground plane, through the dielectric to allow access to the bottom surface of the patch. A center conductor of a coaxial cable is directly connected to the patch. The center conductor of the coaxial cable is surrounded by a metallic housing within the substrate area. The patch forms a first plate for the capacitance while the diameter of the outer housing of the coaxial cable within the substrate is increased to form another plate on the end of the coaxial cable. The value of capacitance can be adjusted by the area of the metallic housing the relative dielectric constant of the spacing material, and the spacing between the plates. The sum of the probe inductive impedance and microstrip patch antenna input impedance using the direct probe connection is adjusted and centered at a desired design center frequency and many such frequencies can be accommodated.

A microstrip patch antenna utilizes a microstrip patch antenna substrate formed of photonic bandgap material. One or more periodic patterns may be used therewith to produce multiple bandgaps into the photonic bandgap material. The periodic patterns may be produced by introducing periodic defects into the dielectric material substrate with drilled holes, slots, shorted vias, blind vias, buried vias, and/or plated or unplated patterns, such as plated patterns on the groundplane or on internally positioned surfaces, or on the surface adjacent the radiating elements. One or more radiating elements are used on an upper surface of said microstrip patch antenna substrate, and a groundplane is formed on a lower surface of said microstrip patch antenna substrate.

A slot fed microstrip patch antenna (300) includes a conducting ground plane (308), the conducting ground plane (308) including at least one slot (306). A dielectric material is disposed between the ground plane (308) and at least one feed line (317), wherein at least a portion of the dielectric layer (313) includes magnetic particles (324). The dielectric layer between the feed line (317) and the ground plane (308) provides regions having high relative permittivity (313) and low relative permittivity (312). At least a portion of the stub (318) is disposed on the high relative permittivity region (313).

The invention discloses an LTCC-stacked microstrip patch antenna, pertains to the antenna technical field and relates to the LTCC (low temperature co-fired ceramic) technology, in particular to a low profile microstrip patch antenna applied to receiving radio. The microstrip patch antenna comprises three layers of LTCC substrates: the first layer of substrate is provided with a coaxial feeding hole, the upper surface thereof is a first radiation metal patch and the lower surface thereof is a reflection plate; the second layer of substrate is evenly provided with air holes; and the upper surface of the third layer of substrate is a second radiation metal patch. In addition, the microstrip patch antenna also comprises a coaxial feeding needle which is inserted into the coaxial feeding hole from the bottom to be connected with the first radiation metal patch on the first layer of substrate and be insulated with the reflection plate. The first, second and third layers of LTCC substrates form an integrity after passing through an LTCC stack and isostatic pressing technology from the bottom up and co-fire is carried out to the integrity at low temperature so as to form another integrity. The microstrip patch antenna can effectively widen the band width of a microstrip antenna, intensify the coupling between two radiation patches and improve the stability and reliability of the antenna.

The invention relates to a vertical coupled structure applied to a millimeter-wave microstrip antenna. The vertical coupled structure comprises microstrip patch antennae, a bottom-layer medium chip substrate, a substrate cavity forming structure, a grounding plate with a gap, a top-layer chip substrate and a coplanar waveguide adapter microstrip feeder line. The microstrip patch antennae are arranged on the bottom sides of the bottom-layer medium chip substrate and the top-layer chip substrate. The substrate cavity forming structure is formed by forming a cavity in the bottom-layer medium chip substrate. The coupling caliber of the gap is located between a bottom-layer medium chip and a top-layer chip. The coplanar waveguide adapter microstrip feeder line is arranged on the upper surface of the top-layer chip substrate. The interlayer vertical interconnection problem of the antenna and a radio-frequency circuit when working frequency is within a millimeter-wave frequency range can be solved by means of the vertical coupled structure. The vertical coupled structure has the advantages of being free of weld points and parasitic radiation and capable of obtaining an even radiation pattern, overcoming the adverse influence brought by a traditional single feed mode and design limitations and the like.

Receiving apparatus for receiving satellite broadcasting electric wave to be mounted mobile vehicle being realized at low cost and not influence by the weather etc. The apparatus is provided with an antenna of which directivity pattern can be varied, and by a geomagnetism sensor mechanically coupled with said antenna to detect present orientation of the antenna, and comprising antenna controlling means by which the directivity pattern of the antenna is directed towards objective broadcasting satellite based on said detected orientation output. When an electric wave from a gap-filler station is to be received, the antenna is controlled to become non-directivity pattern automatically. For the antenna, a microstrip patch antenna having a plurality of conductive patches arranged in a plane is used.

The invention relates to a microstrip patch antenna with a reconfigurable directional diagram, which belongs to the technical field of antennae. The microstrip patch antenna comprises a metal ground plate on the lower surface of a dielectric plate and a radiation patch on the upper surface of the dielectric plate, wherein the radiation patch consists of a square main radiation patch unit and four appended patch units with same distances from four directions of the square main radiation patch unit; each appended patch unit consists of two rectangular patches connected by an electronic switch; and each electronic switch is respectively controlled by a switch controller. Different switch combinations control different appended patches to perform energy radiation so that a plurality of directional diagrams with multiple working modes can be realized. Meanwhile, the invention has the characteristics of little cross polarization, small size and high gain. The microstrip patch antenna is applicable to different antenna arrays to realize beam forming and scanning.

A microstrip patch antenna having high gain and wide band is disclosed. The microstrip patch antenna includes: a first patch antenna layer for radiating a energy supplied from transmitting/receiving feeding circuit and a first radiation patch electrically coupled to the first dielectric layer and supplying the energy to a receiving feeding circuit electrically coupled with the first radiation patch, wherein the energy is supplied by electromagnetic coupling of a first parasitic patch and second parasitic patch; a second patch antenna layer for improving impedance bandwidth of energy received through the first parasitic patch arranged in between the second dielectric layer and the third dielectric layer and radiating the improved impedance bandwidth; and a third patch antenna layer for improving a gain of the energy received through the second parasitic patch arraigned in between the fourth dielectric layer and the fifth dielectric layer.

The present invention is a low-loss polarized antenna for satellite communications and polarimetric weather radar. The antenna may comprise: (a) a microstrip patch antenna, (b) a waveguide, and (c) a coupling interface between the antenna and waveguide. The microstrip patch antennas may individually comprise: (i) a patch radiator having a defined area, and (ii) an associated microstrip.

In a further embodiment of the invention, an antenna array is presented. The antenna array may comprise: (a) a plurality of microstrip antennas, and (b) a plurality of waveguides. The antenna array may further comprise: (c) a waveguide combiner. The microstrip patch antennas may individually comprise: (i) a patch radiator having a defined area, and (ii) an associated microstrip.

In still a further embodiment of the invention, a method for the manufacturing of an antenna is presented. The method may comprise the step: (a) operably coupling a microstrip patch antenna to a waveguide.

The invention discloses a preparing method of polyimide aerogels and hybrid aerogels thereof, belonging to the field of aerogels. In the preparing of the polyimide precursor, the polyamic acid precipitated fiber having a large specific surface area is dissolved in an aqueous solution of triethylamine, then stirred and dissolved. And the thermal imidization is directly frozen and dried without a long sol-gel process to obtain the polyimide aerogels. At the same time, by introducing the filler with different functional characteristics, the functional diversity of polyimide hybrid aerogels is realized. The prepared hybrid aerogels can be used as flexible conductors, microstrip patch antennas, catalysts, water and oil separation membranes, high performance adsorbent materials, etc., and can be used in the fields of flexible wearable microelectronics, aerospace communications, photocatalysis and oil leakage, etc. The application scope of polyimide materials and aerogels materials is expanded, the value of products is enhanced, the preparing cycle is shortened, and its industrialization process is promoted.