37results about How to "Achieving Broadband Features" patented technology

The invention relates to a wideband multi-mode combined antenna. The antenna comprises a dielectric substrate, a slot antenna, a folded dipole, a metal frame and a coaxial feed line, wherein the slot antenna is fixed at the upper side of the dielectric substrate, the dielectric constant of the substrate is 2.65, a rectangular gap is formed in the middle of the dielectric substrate, two short gaps are symmetrically formed in a direction perpendicular to the gap, the coaxial line is used for feeding at the middle of the gap, the folded dipole is vertically connected with the two sides of the middle of the gap, a perpendicular part of the dipole is a trapezoid, a horizontal part of the dipole is a rectangle, and the metal frame is vertically arranged at the periphery of the dielectric substrate. In a designed example, the bandwidth of the antenna is 1.9-2.83GHz, the relative bandwidth is 39.3%, two resonant points are generated at 2.10GHz and 2.69GHz, and wideband characteristic is achieved. The antenna confirms to the wideband requirement, can be applied to frequency bands of LTE, WCDMA, WLAN and RFID, is wide in application range, and has relatively high practicability.

The invention provides a broadband monopole microstrip antenna, and mainly solves the problem that a conventional monopole antenna is narrow in frequency band and complex in three-dimensional structure. The broadband monopole microstrip antenna comprises a dielectric substrate (1), a feed line (2), a radiation patch (3), a high frequency joint (4) and an earth plate (5). The radiation patch (3) isin the shape of an ellipse of which the long axis is in the vertical direction, the front end of the radiation patch is provided with an impedance match adjusting section (6), the earth plate (5) iscomposed of two mutually-perpendicular rectangular metal plates (51, 52), arc-shaped gaps (7) and (8) are respectively carved in the central positions of opposite edges of the two rectangular zones, and the vertical projection of the radiation patch (3) on the bottom of the dielectric substrate is in front of the arc-shaped gap (8) and covers the arc-shaped gap (7). The broadband monopole microstrip antenna can cover S and C wave bands, the working frequency band ranges from 1.62 GHz to 8.28 GHz, and the broadband monopole microstrip antenna can be used as a microwave radiation and reception front-end antenna of a broadband wireless communication, detection or monitoring system.

The invention discloses a meta-material loaded low cross-coupling antenna array. The low cross-coupling antenna array comprises a ground plane, metal patches, a metal connecting rod, a feed probe and a medium substrate, wherein the metal patches are connected with the ground plane through the metal connecting rod and the feed probe in order; the air medium is formed between the ground plane and the metal patch; the metal patches are in N*N array distribution, and a U-shaped groove is formed on the metal patch; the medium substrate is located on the ground plane, and the medium substrate is located between two adjacent metal patches; a dual-opening ring unit is etched on the medium substrate, and N means the array number of the metal patch. The low cross-coupling array disclosed by the invention has the advantages that the broadband feature is realized by etching the U-shaped groove on the patch by using the air medium; the inherent band-stop feature of the dual-opening ring structure is used for effectively inhibiting the cross-coupling influence of the antenna array in the stop band; the low cross-coupling antenna array has a compact structure and a cross-coupling inhibition feature, the plane structure is easy for processing and suitable for large batch production.

The invention discloses a double dipole directional antenna based on same-phase power divider feeding. The double dipole directional antenna comprises a dielectric substrate (12), a double dipole radiating unit, a feeding unit, a first parallel-coupled doublet (5) and a second parallel-coupled doublet (6), wherein the double dipole radiating unit is formed by two printing dipoles printed on the dielectric substrate (12), the feeding unit is a same-phase power divider, and an output port of the same-phase power divider is connected with the double dipole radiating unit through the first parallel-coupled doublet (5) and the second parallel-coupled doublet (6). According to the double dipole directional antenna, the same-phase power divider is adopted to feed the double dipole directional antenna needing reverse feeding, and the same-phase power divider is simple and compact in structure, small in size, light in weight, easy to machine, manufacture and integrate, and capable of reducing complexity of the structure of the antenna. The double dipole directional antenna based on same-phase power divider feeding has the advantages of directed radiation, a wide band, proper gain and the like.

The invention provides a dielectric resonant antenna with an adjustable band trap characteristic, belonging to the field of radio communication, and particularly relates to a dielectric resonant antenna with an adjustable band trap characteristic. The problem that at present band trap-adjustable dielectric resonant antennas hardly eixst is solved. The dielectric resonant antenna comprises a dielectric resonator, a step impedance microstrip line, a dielectric substrate, a defective floor, a first radio frequency switch, a second radio frequency switch and a third radio frequency switch, and ismainly used in the field of radio communication.

The present invention provides a millimeter-wave broadband package antenna based on a Fan-out packaging process, comprising a package component, a microwave dielectric board connected to the package component through a ball grid array, a chip component and a redistribution layer located in the package component, and a redistribution layer located in the package component. The antenna assembly in the layer, the chip assembly includes a silicon-based chip, the antenna assembly includes a circular patch antenna and a feeding structure, and the circular patch antenna is engraved with a unilateral arc rectangular gap and a fan-shaped gap, The centerline of the unilateral arc rectangular notch and the fan-shaped notch are in a straight line, one end of the feeding structure is inserted into the unilateral arc rectangular notch, and the other end is connected to the port of the silicon-based chip. The invention realizes the broadband characteristic by improving the circular patch antenna, and solves the problem of the narrow-band characteristic of the millimeter-wave packaged antenna.

An SKA ultra-wideband refrigeration miniaturized four-ridge horn feed source comprises a conical horn, a four-ridge circular waveguide, a straight waveguide, a horn outer wall, ridge sheets, a first coaxial probe, a second coaxial probe and a short-circuit reflection cavity. One end of the four-ridge circular waveguide is connected with the conical horn, and the other end is connected with the short-circuit back cavity. The four ridge sheets are in a curved concave shape and are respectively embedded into the conical horn and the four-ridge circular waveguide. The first coaxial probe and the second coaxial probe are respectively inserted in from two ridge sheets, penetrate through the center of the four-ridge circular waveguide and then reach the ridge sheets at opposite positions. The first coaxial probe and the second coaxial probe are segmented into five matching sections through cascading of a plurality of matching blocks, and the return loss is reduced by adjusting the length andwidth of each section. The horn outer wall is loaded outside the conical horn and the four-ridge circular waveguide. The short-circuit reflection cavity is located in the straight waveguide and comprises an L-shaped matching block and a cutting inverted cone frustum. The working frequency band of the feed source is 2.4-24 GHz, and a refrigeration Dewar matched with the feed source is developed.

The invention belongs to the field of wireless mobile communication, and in particular relates to a compact multi-band antenna. The invention consists of a dielectric substrate, a microstrip transmission line, a first bow-shaped radiation unit, a second anti-shaped radiation unit, a third C-shaped radiation unit, a fourth anti-C-shaped radiation unit, and a ground plane. The first bow-shaped radiating unit and the second anti-C-shaped radiating unit adopt a bow-shaped multi-bending structure, and the third C-shaped radiating unit and the fourth anti-C-shaped radiating unit adopt a C-shaped bending structure. The invention adopts microstrip transmission line feeding, the radiating unit adopts the combination of direct feeding and indirect feeding, adopts multiple bending symmetrical structure and multi-unit integrated design, and realizes the multi-band and miniaturized design of the antenna , the compact multi-band antenna designed by the present invention has the characteristics of low profile, small size, low cost, easy integration, and loadable reactance elements, etc., and can be widely used in various wireless mobile communication devices.

The invention discloses a high-efficiency wideband power amplifier with a band-pass filter response function. The high-efficiency wideband power amplifier comprises a DC biasing circuit, a power amplification transistor, an input match circuit and an output match circuit. A microstrip line band-pass filter with different port impedances and a section of tuning microstrip line are designed to be used as the output match circuit of the power amplifier, the function of the filtering is achieved, meanwhile, the circuits are made to have the band-pass filter response characteristic, and two transmission zeros are generated on the edge of a passband. Compared with a traditional cascade circuit of a power amplifier and a filter, due to the fact that the microstrip line band-pass filter is used as the output match circuit, the entire circuit is small in size, small in loss and wide in working band, and high edge selectivity is achieved due to the two transmission zeros. The high-efficiency wideband power amplifier with the high-pass filter response function is achieved, and testing result validation is provided.

The invention discloses a broadband base station antenna based on a monopole structure, which includes a radiation structure, four identical coaxial feeders, a reflector, and a support column. The radiation structure is composed of four identical monopole structures, metal The floor structure is composed of a first medium plate; the metal floor structure includes a first metal patch printed on the upper surface of the first medium plate, a second metal patch printed on the lower surface, metal branches, metal through holes and Square slits; the four identical monopole structures are composed of semicircular patches and short microstrip lines; the four identical monopole structures are located on the upper surface of the first dielectric plate, and about the center of the Z axis Symmetrical distribution; the short microstrip line extends to the position corresponding to the square slot. The present invention adopts four identical monopole structures as the main radiation patch, and the antenna structure is simple. The present invention can be used for base station antennas in IMT / 2G / 3G / 4G / LTE systems.

The invention discloses an artificial magnetic conductor-based miniaturized broadband low-profile dual-polarized antenna, relates to the field of antennas and aims at solving the problems that an existing dual-polarized antenna is too high in profile, relatively large in size and narrow in band. A space coupling feeder line is printed on the upper surface of a first dielectric plate; two dipole antennas are vertical and are printed on the lower surface of the first dielectric plate; parasitic strips are symmetrically distributed on the periphery of the first dielectric plate by taking the intersection point of the two dipole antennas as the center; an AMC reflecting back plate is located below the first dielectric plate; two coaxial lines correspond to the two dipole antennas one by one; the two coaxial lines vertically pass through the AMC reflecting back plate and are electrically connected with the corresponding dipole antennas through outer conductors of the coaxial lines respectively; and inner conductors of the coaxial lines are electrically connected with a feeder point of the space coupling feeder line. The artificial magnetic conductor-based miniaturized broadband low-profile dual-polarized antenna is suitable for a mobile communication system.