201 results about "Microstrip feed line" patented technology

A multi-band single feed dielectric resonator antenna (DRA) and DRA array are provided. The DRA is made of a dielectric material having a first and second antenna regions wherein the second antenna region has a different dielectric constant than the first antenna region. The dielectric material is supported by a feeding substrate. The feeding substrate has a top surface ground plane having a slot positioned below the first antenna region of the dielectric material and a microstrip feeding line on the bottom surface in alignment with the slot on the top surface ground plane.

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.

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.

An exemplary apparatus providing an antenna for radiating electromagnetic energy is disclosed as having: a first dielectric substrate having opposite first and second surfaces, a patch of conducting material disposed on the first surface, a ground plane of conducting material disposed of the second surface, at least three input means coupled to a plurality of microstrip feed lines wherein the microstrip feed lines have an aspect ratio suitably configured to maximize antenna bandwidth. Disclosed features and specifications may be variously controlled, adapted or otherwise optionally modified to improve and / or modify the performance characteristics of the antenna. Exemplary embodiments of the present invention generally provide an antenna for providing wideband power combining and wideband radiation functions.

A reconfigurable polarization antenna includes a microwave dielectric substrate having a ground plane that has a centrally located slot with five conducting patches, four of which form an evenly spaced apart perimeter group with a gap between each and the fifth, centrally positioned conducting patch. A conducting pad is positioned in each gap and is connected via a switch to the ground plane. A microstrip feed line including a short stub is positioned on the opposite side of the substrate and electromagnetically coupled to the slot. The polarization of the antenna is reconfigured by a selection of an on or off state of each of said switches.

Provided is an antenna based on proximity coupling between a short-ended microstrip feed line and a radiation patch, an RFID tag including the planar antenna, and an antenna impedance matching method thereof. The antenna includes a radiation patch configured to determine a resonant frequency of the antenna; a ground plate disposed in parallel to the radiation patch; and a feeding part disposed between the radiation patch and the ground plate and configured to provide radio frequency signals to a device connected to the antenna. The feeding part includes a feed line that is formed in a resonance length direction of the radiation patch and proximity-coupled with the radiation patch and one end of the feed line is shorted. The antenna freely controls the resistance and reactance of the antenna impedance independently and efficiently matched to a device connected to the antenna which has a predetermined impedance in wide bands.

A slot fed microstrip antenna (100) provides improved efficiency through enhanced coupling of electromagnetic energy between the feed line (117) and the slot (106). The dielectric layer (105) between the feed line (117) and the slot (106) includes magnetic particles (114), the magnetic particles (114) preferably included in the dielectric junction region (113) between the microstrip feed line (117) and the slot (106). A high dielectric region is preferably also provided in the junction constant to further enhance the field concentration effect. The slot antenna (100) can be embodied as a microstrip patch antenna (200).

The invention provides a printing boardband terminal antenna with smaller occupying space. The printing boardband terminal antenna comprises a first bent metal strip group and a second bent metal strip group; a gap is formed between the first bent metal strip group and the second bent metal strip group; a microstrip feed line is used for directly feeding electricity to the first bent metal strip group so as to excite a high-frequency current on the first bent metal strip group to form resonance; and a high-frequency current on the second bent metal strip group is excited by capacitive coupling of the gap between the first bent metal strip group and the second bent metal strip group to form resonance. According to the invention, the first bent metal strip group and the second bent metal strip group are not directly connected, a plurality of frequency points are matched according to the distributed parameter effect of the gap between the two metal strip groups, and therefore the bandwidth can be widened in a larger extent. Therefore, the size occupied by the antenna can be reduced; in addition, a dedicated matching circuit and a special substrate material are not required in the invention.

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 a miniature dual polarized antenna suitable for WLAN, which comprises a metal radiation patch, a microstrip feed line, a first dielectric plate, a second dielectric plate and a grounding plate, wherein the metal radiation patch is arranged on the upper surface of the first dielectric plate; the microstrip feed line is arranged between the first dielectric plate and the second dielectric plate, and is etched in the center of two adjacent edges of the upper surface of the second dielectric plate; and the grounding plate is arranged on the lower surface of the second dielectric plate. The miniature dual polarized antenna has the advantages of high gain, wide band, low loss, low cost, compact structure, good radiation performance and the like, and satisfies the requirements of a WLAN communication network at 2.4 GHz frequency band.

The invention provides an antenna which can acquire a wide work bandwidth on a small size space of a universal serial bus (USB) dongle. Antenna wiring, a microstrip feeding line and a matching circuit are arranged on one side of a USB dongle motherboard. Metal ground is arranged on the other side of the USB dongle motherboard. A non-metal area is arranged in the metal ground and at least one side is not closed by the metal ground. Therefore, a semi-closed area is formed in the metal ground. The non-metal area comprises a corresponding area located on a surface where the metal ground is positioned, wherein the antenna wiring is orthographically projected on the surface where the metal ground is positioned. A coupling gap exists between the antenna wiring and the metal ground in space. The microstrip feeding line performs feeding to the antenna wiring the through matching the network so that a high frequency current is excited on the antenna wiring and resonance is formed. On one hand, the high frequency current of the antenna wiring enters into the metal ground through a narrow strip. On the other hand, the high frequency current excites the high frequency current of the metal ground so as to form the resonance through capacitive coupling of the coupling gap. By using the antenna of the invention, the work bandwidth of an objective resonant point excited on the antenna wiring can be widened and a specific absorption rate (SAR) value can be reduced.

A slot fed microstrip antenna (100) provides improved efficiency through enhanced coupling of electromagnetic energy between the feed line (117) and the slot (106). The dielectric layer (105) between the feed line (117) and the slot (106) includes magnetic particles (114), the magnetic particles (114) preferably included in the dielectric junction region (113) between the microstrip feed line (117) and the slot (106). A high dielectric region is preferably also provided in the junction constant to further enhance the field concentration effect. The slot antenna (100) can be embodied as a microstrip patch antenna (200).

The invention provides a millimeter wave communication and radar integrated radio frequency front end designing method, and aims at achieving the diversity of signal receiving and transmitting of a millimeter wave radar, integration of millimeter wave communication and radar functions and integration of a millimeter wave radar radio frequency front end and a transmitting-receiving antenna. According to the millimeter wave communication and radar integrated radio frequency front end designing method, firstly, on the basis of a universal communication chip, a radar transmitting-receiving circuitis designed, therefore, the millimeter wave radar can transmit and receive baseband input signals of an arbitrary modulation system, necessary hardware support is provided for a more complex parameter estimation algorithm for radar signal processing, and at the same time, the integration of the communication and the radar is achieved; then, a microstrip balun structure and a microstrip antenna which are used for converting differential signals into single-ended signals are designed for the radio frequency front end, so that integration design of the millimeter wave radar radio frequency frontend and the transmitting-receiving antenna is achieved; finally, a strip-line feed structure is designed for the microstrip receiving antenna of a radio frequency front end receiving circuit, and theinfluence of a microstrip feed line self-radiation direction on an antenna self-radiation direction diagram is effectively reduced.

The invention belongs to the technical field of an antenna in a communication system, and specifically relates to a trapped wave controllable ultra-wide-band antenna. The trapped wave controllable ultra-wide-band antenna comprises a microstrip feeder line, a radiation unit, a dielectric substrate and a grounding plate; the microstrip feeder line and the radiation unit are arranged on the upper layer, the dielectric substrate is arranged in the middle layer and positioned below the microstrip feeder line and the radiation unit, and the grounding plate is arranged on the lower layer and positioned below the dielectric substrate; an open circuit gap and an opening resonance ring are arranged on the radiation unit, and the open circuit gap extends from the right side edge of the radiation unitto the interior of the radiation unit; a first opening resonance ring and a second opening resonance ring are arranged on the grounding plate; the open circuit gap and the opening resonance ring areloaded with a first PIN diode and a second PIN diode respectively; and the first opening resonance ring and the second opening resonance ring are loaded with a third PIN diode and a fourth PIN diode respectively. The trapped wave controllable ultra-wide-band antenna can realize ultra wide band, single band wave trapping, dual band wave trapping and triple band wave trapping, and is simple in structure and suitable for the ultra-wide-band wireless communication system.

The invention discloses a ultra-wideband antenna with adjustable double notches based on varactors and belongs to the technical field of antenna design. The antenna comprises a dielectric substrate, a radiation chip, a microstrip feed line, a parasitic strip structure, a U-shaped metallic strip, a metallic tape line, a bonding pad, a grounding board, and a coaxial cable. The U-shaped metallic strip is used for generating a high-frequency notch. The varactor adjusts the operating frequency of the high-frequency notch. The parasitic strip structure comprises a parasitic strip and a varactor. The parasitic strip is used for generating a low-frequency notch and the varactor adjusts the operating frequency of the low-frequency notch. According to the ultra-wideband antenna with adjustable double notches based on varactors, the operating frequencies of the two notches are adjusted by the varactors so as to cover a WiMAX frequency band and a WLAN frequency band while the adjustment of the two notches does not influence each other. A frequency agility characteristic of the double notches is effectively achieved.

Embodiments in accordance with the invention include a linearly polarized dipole antenna with an unbalanced microstrip feed line. More specifically, embodiments in accordance with the invention utilize a fed dipole connected to a microstrip feed line, and separated a gap distance from a parasitic dipole not connected to the microstrip feed line. When an electrical signal is input to the microstrip feed line, the microstrip feed line creates a current flow in the fed dipole which induces a nearly equal current on the parasitic dipole that is out of phase. The result is a current flow, I, in the same direction in both fed and parasitic dipoles allowing for efficient radiation of the linearly polarized dipole antenna. Embodiments in accordance with the invention eliminate the need for a balun circuit thereby reducing the size, complexity and feed loss of the feed circuit. Embodiments in accordance with the invention are effective for dipoles with relatively small ground planes.

The invention discloses a broadband low-profile dielectric resonator antenna based on a two-dimensional periodic structure. The antenna comprises a first substrate, a second substrate located under the first substrate, and a dielectric resonator unit located above the first substrate for expanding the bandwidth,wherein, a microstrip feed line is disposed on a lower surface of the second substrate,a coupling feed slot perpendicular to the microstrip feed line is formedin an upper surface of the second substrate, a plurality of metalized through holes are formed around the dielectric resonatorunit, the metalized through holes penetrate the first substrate and the second substrate to form a substrate integrated waveguide back cavity, and the dielectric resonator unit includes a plurality ofdielectric sub-blocks spaced apart from each other in an array. The antenna has the characteristics of low profile and small plane size while satisfying the broadband, and is suitable for antenna array design.

A patch antenna has a primary radiator, a dual microstrip feed line configured to utilize corner-feeding to enable substantially diagonal radiating modes, and at least two parasitic patches that are arranged adjacent and on opposite sides to the primary radiator.

The invention provides a dual-polarization dielectric resonator antenna unit, and the dielectric resonator antenna unit comprises a substrate, a dielectric resonator and a director, wherein the substrate, the dielectric resonator and the director are sequentially connected from the bottom to the top. The upper surface of the substrate is provided with a grounding surface, and a gap is disposed in the grounding surface in an etching manner. The lower surface of the substrate is provided with a microstrip feed line which is matched with the gap and is used for feed. The projections of the dielectric resonator and the director on the substrate cover the gap. According to the embodiment of the invention, the dielectric resonator antenna unit meets the requirements of low profile and high gain of a dual-polarization dielectric resonator antenna unit. Moreover, a feed structure of the dielectric resonator antenna unit is symmetric, and is liable to assemble. In addition, the invention also discloses a base station antenna comprising the dielectric resonator antenna unit.

The invention discloses an S-waveband light-controlled phased array unit antenna and relates to the technical field of wireless communication. The S-waveband light-controlled phased array unit antenna comprises a medium substrate, three directors, a pair of excitation oscillators, a reflection oscillator and a microstrip feed line, wherein the medium substrate comprises a front surface and a back surface, the directors, the excitation oscillators and the reflection oscillator are disposed at the front surface of the medium substrate, and the microstrip feed line is disposed at the back surface of the medium substrate; and the front surface of the medium substrate is provided with the copper-coated directors, the excitation oscillators and the reflection oscillator, and the three directors, the excitation oscillators and the reflection oscillator are successively arranged on the medium substrate from top to bottom. Compared to the prior art, the S-waveband light-controlled phased array unit antenna has the following advantages: simulation is carried out through Ansoft HFSS electromagnetic simulation software, a comparison is made with an actual test of an antenna, results show that the relative bandwidth of a standing-wave ratio (VSWR)2 reaches 40%, and the maximum gain at a center frequency point 2.4GHz is 6dB.

A double stop-band super-broadband antenna basing on the asymmetrical spinous line belongs to the wireless communication technique field. The antenna comprises a medium board (1) and a metal printing antenna arranged at two sides of the medium board (1); wherein the front side of the medium board (1) is arranged with a microstrip feed port (2), a microstrip feed line (3), an asymmetrical spinous line (4) and a microstrip radiating element (5), the microstrip feed line (3) is arranged at the central axis of the medium board (1), the upper part of the microstrip feed line (3) is connected with a microstrip radiating element (5), the lower part of the microstrip feed line (3) is a microstrip feed port (2), and the two sides of the middle part of the microstrip feed line (3) are arranged with asymmetrical spinous lines (4); and the lower part at the back side of the medium board (1) is arranged with an earth unit (6). The invention can effectively cover the request frequency band of FCC, namely 3.1-10.6GHz, at the same time two stop-bands can be generated in the frequency band. The antenna of the invention has the characters of low cost, simple structure and small volume.

The invention discloses an ultrahigh-frequency broadband microstrip antenna for partial discharge monitoring of a switchgear, and belongs to the field of an electrical equipment insulation state online monitoring technology. The antenna structurally comprises an antenna metal radiation patch, a medium substrate, a metal ground plate, a microstrip feed line and an SMA joint. The antenna provided by the invention has the advantages of wide frequency band, small standing-wave ratio, convenient impedance matching, low manufacturing cost, convenient installation, unaffected normal operation of monitoring equipment, and the like, and can meet the requirement for ultrahigh-frequency online monitoring of partial discharge of a switch gear used for a transformer station.

The invention discloses a low-frequency ultra-wideband planar omnidirectional antenna. The antenna includes a dielectric substrate, a metal radiation patch, a metal ground plate and a loading resistor. The dielectric substrate is made from FR-4, and has a first surface and a second surface opposite to the first surface. The metal radiation patch is arranged on the first surface of the dielectric substrate. The metal ground plate and the loading resistor are arranged on the second surface of the dielectric substrate. The metal radiation patch is formed by a U-shaped patch and a disc. The tail end of the U-shaped patch and the top end of a gradual changing microstrip feed line are connected via an inverted triangular metal patch. The metal ground plate is a rectangular frame metal patch, a trapezoid patch and two long strip patches are arranged inside the metal rectangular frame, and the same load resistance is applied to the two ends of the metal rectangular frame. Feeding of the whole antenna is carried out through a 50[omega] coaxial line. The low-frequency ultra-wideband planar omnidirectional antenna provided by the invention is compact in structure and wide in bandwidth scope, and exhibits good low frequency omnidirectional performance.

A wideband low profile microstrip antenna aimed at ensuring low profile characteristics, widen the bandwidth of microstrip antenna, includes a first dielectric substrate and a second dielectric substrate stacked in a rectangular shape, a radiation unit is printed on the upper surface of the first dielectric substrate, the radiating element comprises N rectangular patches arranged in parallel, tworows of second rectangular slots parallel to the long sides of the rectangular patch are etched thereon, the number of each row of second rectangular slots is M, a metal floor is printed on the lowersurface of the first dielectric substrate, the metal floor is etched with the first rectangular slots, the rectangular patch is connected with the metal floor through M metallized vias, and a microstrip feed line is printed on the lower surface of the second dielectric substrate; The invention not only ensures the low profile characteristic of the microstrip antenna, but also widens the working bandwidth of the microstrip antenna, and can be used in a wireless communication system.

The invention discloses a flower-shaped feed terminal multi-frequency microstrip antenna loaded with hexagonal parasitic branches, comprises a dielectric substrate, a flower-shaped feed terminal printed on the front surface of the dielectric substrate and loaded with hexagonal parasitic branches, a slotted microstrip feed line with a combined structure, a polygonal radiation gap floor printed on the back surface of the dielectric substrate and an external coaxial joint. By loading hexagonal parasitic branches to extend the current path around the hexagonal monopole, the resonant frequency in low frequency band is reduced. Polygonal radiation slots generate radial current paths that excite the flower-shaped feed terminals loaded with hexagonal parasitic branches to generate multiple resonant frequencies. Four rectangular slots are added to the four corners of the polygonal radial slot floor to increase the floor surface current path, adjust the resonant frequency of the antenna in the high frequency band and expand the bandwidth. The flower-shaped feed terminal multi-frequency microstrip antenna can meet the bandwidth requirements of different frequency bands by changing the antennasize, and is suitable for small multi-band wireless communication systems of WLAN and WiMAX frequency bands.

The invention discloses a planar phased-array antenna capable of two-dimensional scanning at a wide angle, belonging to the technical field of an antenna. The phase-array antenna unit comprises a dielectric substrate, a radiating patch, a microstrip feed line and a grounding plate, wherein the radiating patch and the microstrip feed line are arranged on the front surface of the substrate, and the grounding plate is arranged on the back surface of the substrate. With a grooving design on the radiating patch, a placing space is provided for a feed network, and the size of the antenna is also reduced; with a coaxial back feeding mode, a signal is divided into two paths to supply equivalent-amplitude same-phase feed to the radiating patch, so that a TM11 mode of the antenna is simulated, the radiation pattern of the antenna has the characteristic of wide beam, and the phased-array antenna has the capability of scanning at the wide angle; meanwhile, in order to achieve a favorable matching effect, the feed network inside the radiating patch is designed in a gradually-changing microstrip mode; and finally, the antenna units are arranged at equal intervals to form an area array structure, the beam coverage angles of the units are relatively large, and the two-dimensional wide-angle beam scanning can be achieved after the units are reasonably arranged.

The antenna consists of rectangle aperture printed on metallic earth plate on a side of medium base plate, circular patch, feed source of microstrip at another side, and metal reflecting plate at back. The wide aperture is as main radiant point. Fan shaped terminal of microstrip feed line connected to horizontal branch node constitutes feed source of microstrip, and circular patch is introduced to obtain super broadband impedance characteristic. The medium base plate is extended properly in order to improve radiation characteristic. Rear additive metal reflecting plate is in use for increasing gain. The antenna can obtain impedance bandwidth more than three frequency octaves (voltage standing wave ratio VSWR less than and equal to 2). Gain can reach to 5.5-8dB in range of bandwidth. Microstrip feed line is adopted in the antenna, and coaxial fitting is connecting piece. Features are: simple planar construction, easy of integration to active circuit, and low cost.