385 results about "Antenna bandwidth" patented technology

In an embodiment, an antenna for a medical device, e.g., an implantable medical device (IMD), comprises an electrically conductive wire that spirals to form a three-dimensional shape of a rectangular cuboid. In another embodiment, the antenna comprises an electrically conductive wire that spirals to form a three-dimensional shape of an elliptical cylinder, an oval cylinder, an elongated pentagonal prism, an elongated hexagonal prism, or some other shape where the longitudinal diameter of the antenna is greater than the lateral diameter of the antenna. The antennas are sized to fit within a portion of a header of the medical device. Such antennas are designed to provide increased antenna gain and antenna bandwidth.

The invention relates to an antenna structure (400) to be placed inside in particular small radio apparatus. A conventional PIFA-type structure is extended by arranging a structural part (415) adding to the capacitance between the radiating plane (420) and ground plane (410) relatively close to the feed point (F) of the antenna. The structural component may be a projection extending from the radiating plane towards the ground plane or vice versa. An advantage of the invention is that it achieves a significant increase in the antenna bandwidth without increasing the size of the antenna. Another advantage of the invention is that the structure according to it is simple and the increase in the manufacturing costs is relatively low.

A wireless communication system includes a) a first device having a transmitter part with a Tx-antenna for transmitting an electrical signal having a signal bandwidth BW_sig and b) a second device having a receiver part with an Rx-antenna for receiving the transmitted electromagnetic signal. At least one of the Tx- and Rx-antennas is a narrowband antenna having an antenna bandwidth BW_ant, wherein the Tx- and/or Rx-antenna bandwidths fulfil the relation BW_ant=k·BW_sig. The system is adapted to provide that k is smaller than 1.25, and the antenna bandwidth BW_ant is defined as the −3 dB bandwidth of the loaded antenna when it is connected to the communication system, and the signal bandwidth BW_sig is defined as the bandwidth within which 99% of the desired signal power is located.

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.

The invention discloses an artificial magnetic conductor structure-based broadband low-profile dual-polarized omnidirectional antenna, which structurally comprises a horizontally polarized loop antenna, an artificial magnetic conductor reflection plate structure and a vertically polarized antenna, wherein the horizontally polarized loop antenna and the vertically polarized antenna are vertically placed; the loop antenna comprises four pairs of rotationally symmetrical printed dipoles printed on two sides of a first dielectric plate (1); an artificial magnetic conductor comprises periodic patch elements (22) which are printed on the upper surface of the first dielectric plate (1), an air layer between a second dielectric plate (2) and the upper surface of a metal floor (3) and the metal floor (3); and the vertically polarized antenna comprises a metal cone (8), a patch (25) printed on the upper surface of a third dielectric plate (11) and a short-circuit pole (6). The artificial magnetic conductor structure-based broadband low-profile dual-polarized omnidirectional antenna is applied to indoor communication of a miniature mobile communication system and effectively reduces the profile height of the dual-polarized omnidirectional antenna under the premise of ensuring the antenna bandwidth and the non-circularity.

The invention relates to a wide band one-layer microstrip patch antenna, which solves the problem of narrow impedance width in the currently common microstrip antenna. The microstrip patch of the antenna is a one-layer microstrip patch; one end of a stair-stepping coplane microstrip line with two widths is inserted in the patch antenna by the open slot on a convex microstrip patch, and the other end of a feeding microstrip line is positioned at the edge of a microstrip dielectric-slab; a concave metal carinal cavity is arranged at the back surface of the microstrip dielectric-slab excluding the position corresponding to the microstrip patch and in the middle of structural mounting plate. The wide band one-layer microstrip patch antenna can form a large microstrip patch antenna array easily, which is in favor of impedance matching of the antenna, the subnetwork design for microstrip work, the weight reduction of the antenna and the bandwidth widening of the antenna; the wide band one-layer microstrip patch antenna of the invention has the advantages of simple and compact structure and small cross section, which improves the telecommunication performance and reduces the whole weightof the antenna array.

The invention discloses a novel broadband printed dipole antenna with a branch wire integrated with a feed balun. The novel broadband printed dipole antenna comprises an SMA (Shape Memory Alloy) joint, a dielectric-slab, a radiating element and a microstrip line feed integrated balun, wherein the radiating element is provided with a slotting seam; dual radiation arms are formed on both sides of the slotting seam; the microstrip line feed integrated balun is provided with a branch wire; the branch wire is equivalent to a series resistor, and is used for improving the matched impedance. According to the novel broadband printed dipole antenna, the VSWR (Voltage Standing Wave Ratio) is less than or equal to 1.5, and the relative bandwidth is up to 58.7 percent (1.65-3.0GHz); compared with other bandwidth extension technologies (such as a parasitic patch increasing technology), the novel broadband printed dipole antenna has the advantages that design is made on the basis of not changing the original size of the antenna, so that the bandwidth of the antenna is improved, other performance of the antenna (such as gain and cross polarization level) is not influenced, and the occupied space is reduced; the novel broadband printed dipole antenna has the advantages of simple structure, convenience, practicability, wide adaptability and the like.

The invention discloses a miniature low-profile broadband dual-circular-polarization microstrip antenna.The antenna is composed of a first dielectric substrate, a metal supporting frame, a second dielectric substrate and a third dielectric substrate.Parasitic metal surface-mounted devices are arranged on the upper surface and the lower surface of the first dielectric substrate, the surface-mounted device on the upper surface is larger than the surface-mounted device on the lower surface in size, and the surface-mounted devices are connected through four metalized through holes; a feed surface-mounted device is arranged on the upper surface of the second dielectric substrate; the third dielectric substrate comprises four strip lines, a 90-degree bridge, two feed probes and two radio frequency coaxial connectors.The 90-degree bridge and dual-feed technologies are adopted for realizing dual circular polarization, a laminated structure and a dual-parasitic surface-mounted device structure connected through the metalized through holes are adopted comprehensively to expand the bandwidth of the microstrip antenna, so that the bandwidth of the antenna reaches 19.4%, and the circular polarization ratio within the frequency band range is smaller than 1.3 dB; the antenna has miniature low-profile characteristics, and the size is 0.45 lambda0*0.45 lambda0*0.075 lambda0.

The invention belongs to the technical field of communication, and especially relates to an LTE multi-frequency-band antenna and a mobile terminal. The LTE multi-frequency-band antenna comprises an antenna main body part, a first branch part and a second branch part; the antenna main body part is provided with a feeding point (101) and a first grounding point (102), and a first high-frequency band is covered through resonance; the first branch part and the antenna main body part are spaced by a first gap, the antenna main body part performs coupling feeding through the first gap, and is resonant at a first resonance frequency point (f1) to cover a first low-frequency band; and the second branch part and the antenna main body are spaced by a second gap, the antenna main body performs coupling feeding through a second gap, and is resonant at a second resonance frequency point (f2) to cover a second low-frequency band. The technical scheme adopts a double coupling feeding mode, the antenna bandwidth can be effectively increased, an antenna resonance main body is relatively clear, and antenna analyses and debugging are easy.

The invention relates to a two-dimensional waveguide slot array antenna having a decoupling structure and a design method thereof and relates to a waveguide slot antenna. The antenna sequentially comprises a T-shaped power splitter main waveguide, a feed waveguide, coupling slots, a radiation waveguide, radiation slots and an open air cavity from down to up. The antenna has the decoupling structure, the open air cavity is added outside the radiation slot, the mutual coupling effect between the radiation slots is suppressed by optimizing the three-dimensional size of the air cavity, and antennabandwidth constraints of mutual coupling in large-scale arrays are effectively ameliorated. According to antenna bandwidth design requirements, the proper antenna feed network is designed, through antenna sub-arrays, the integral antenna is simplified into multiple sub-arrays, so antenna bandwidth is ameliorated, and design difficulty is reduced; the quantity of radiation slots and coupling slotsin series connection in each sub-array is small, a resonant array can be employed for design, namely a standing wave array form, and matching bandwidth and radiation bandwidth of the antenna sub-arrays are greatly improved through specifically employing the overloaded technology.

The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). A transmitter includes apparatus for integrating the antenna feed into a multilayer PCB. The apparatus includes an antenna element disposed over the multilayer PCB having slot openings that substantially overlap and that enable an RF signal to be coupled from a printed transmission line located on one of the multilayer PCB conductive layers. The multilayer PCB board hosts at least one transceiver unit and a baseband unit such that the antenna feed, transceiver and baseband units are integrated on a single multilayer PCB board without degradation of antenna bandwidth and efficiency.

The invention discloses a silicon-based small-sized common-caliber dual-frequency dual-polarized broadband array antenna. The antenna comprises a plurality of dual-frequency dual-polarized antenna units, and each dual-frequency dual-polarized antenna unit adopts a laminated structure and consists of a low-frequency band radiation unit, a high-frequency band radiation unit, two frequency band feedstructures and a metal grounding plate. The low-frequency-band radiation unit is provided with a square hole and is placed in the high-frequency-band radiation unit to achieve the common caliber. Thehigh-resistance silicon is adopted as a dielectric substrate, so that the array element size is greatly reduced, and the miniaturization requirement is met. The bandwidth of the antenna is broadened in a manner of hollowing out a silicon-based air introduction layer. The common-caliber dual-frequency dual-polarization broadband array antenna can work in two frequency bands with the frequency ratiobeing about 2 at the same time, the characteristics of the two frequency bands are dual polarization, the antenna array layout is reasonable, and the common-caliber dual-frequency dual-polarization broadband array antenna has the advantages of being simple in structure, small in size, good in polarization performance, high in antenna isolation and the like.

The invention provides a broadband coded folded reflectarray antenna based on subwavelength single-layer reflecting units, and solves the problems that the folded reflectarray antenna is narrow in bandwidth and high in design complexity. According to the antenna in the invention, a polarized grid plate and a main array surface equal in area are vertically installed at equal interval; a feed sourceis installed in the geometrical centre of the main array surface; the main array surface in the invention is composed of two subwavelength single-layer reflecting units having 180 DEG phase difference and the same structure by periodic coded arrangement according to a classical reflection array phase theory; in the two reflecting units having the 180 DEG phase difference in the invention, one reflecting unit is the 0 reflecting unit; the other reflecting unit is the 1 reflecting unit, which is formed by counterclockwise rotation of the 0 reflecting unit in 90 DEG; the folded reflectarray antenna in the invention has the high-gain pencil beam; the design difficulty of the antenna array is reduced; the bandwidth is wide; the design complexity is low; the advantages of high gain, low loss, compact structure, low cross polarization and the like of the folded reflectarray antenna are sufficiently played; and the antenna can be applied to a high-performance communication or radar system.

An antenna structure and a method for increasing an antenna bandwidth are provided. The antenna structure includes a feeding portion, a first resonating element electrically connected to the feeding portion, a protruding portion electrically connected to the feeding portion, and a second resonating element coupled with the protruding portion.

The invention provides an LTCC aperture coupling array antenna, belongs to the technical field of antennas and aims at overcoming the defects of an existing micro-strip array antenna in the aspect of giving consideration to miniaturization, broadband and high gain. The LTCC aperture coupling array antenna comprises upper and lower layer radiation metal patch units, upper, middle and lower layer dielectric substrates, a grounded metal layer, resonance apertures and a micro-strip feed network, wherein the upper layer radiation metal patch units are arranged in triangular lattices, and the lower radiation metal patch units are arranged in rectangular lattices. Compared with regular micro-strip patch array antennas based on organic media or ceramic substrates, the LTCC aperture coupling array antenna is capable of obtaining a larger antenna bandwidth under the same size limit and giving better consideration to the performance requirements of miniaturization, broadband and high gain of the patch antenna.

The invention provides a minitype broadband circularly polarized antenna. The minitype broadband circularly polarized antenna comprises a coupled radiation dielectric plate, a bonding layer, a support dielectric plate and a feeding panel which are attached in sequence, wherein the feeding panel is located below the support dielectric plate, and is connected with a feeding probe through a grounding probe. The antenna bandwidth is effectively broadened through coupled feeding among the coupled radiation dielectric plate, the support dielectric plate and the feeding panel, the grounding probe load effectively reduces the size of the antenna, and the coupled radiation dielectric plate loads an L-type perturbation element to extend the current path, reduce the size of the antenna and broaden the axis ratio bandwidth of the antenna. On the basis of guaranteeing gain, the minitype broadband circularly polarized antenna effectively reduces the volume of the antenna, increases the bandwidth of the antenna, and meets the requirements of various systems for the size and performance of the antenna.

The present invention discloses an aperture coupled feeding broadband patch antenna with dual-polarization performance. The aperture coupled feeding broadband patch antenna comprises a radiation layer, an aperture coupling layer and a feeding layer; the radiation layer is fitted on the aperture coupling layer; the feeding layer is fitted beneath the aperture coupling layer; the upper surface of the radiation layer is provided with a circular radiation patch for widening antenna bandwidth; the upper surface of the aperture coupling layer is provided with an annular coupling patch; a copper-plated metal surface is laid on the upper surface of the feeding layer; a first feeding slot, a second feeding slot and an isolation slot are formed in the copper-plated metal surface through etching; and the lower surface of the feeding layer is provided with a first feeder line and a second feeder line which are perpendicular to each other, the joint of the length edges of the first feeder line and the second feeder line is provided with a first port, the joint of the width edges of the first feeder line and the second feeder line is provided with a second port, and therefore, the dual-polarization performance of the antenna can be realized. According to the antenna of the invention, the isolation slot of which the tilt angel is 45 degrees is formed in the copper-plated metal surface of the feeding layer, and therefore, the isolation degree of the antenna is improved.

The invention, which relates to the technical field of communication, provides an antenna structure and a mobile terminal. The antenna structure comprises an antenna feed source, an antenna radiation arm, a feed switch, and control switches. A first end of the feed switch is connected to the antenna feed source and a second end is connected with the antenna radiation arm. The control switches are connected with a plurality of ground points on the antenna radiation arm correspondingly. Therefore, problems of antenna bandwidth and efficiency reduction of the existing antenna structure are solved.

The invention provides a method for realizing satellite navigation positioning by adopting different navigation frequency bands and relates to the satellite navigation technology. The existing communication satellite is rent for navigation positioning and no navigation satellite is launched specially. The rent satellite adopts different navigation frequency bands which are close to each other instead of the same navigation frequency band. As the selected navigation frequency bands are close, the same antenna containing all the navigation frequency bands can be used for ground receiving. GPS chips which are low in price, stable and reliable in the market are adopted in a navigation receiver, which lowers the manufacturing cost of a satellite receiver. As the GPS chips are designed directing at the frequency band of GPS, namely the L wave band, frequencies of navigation signals with different frequency bands are converted to the frequency band of the GPS by a frequency conversion unit, time delay caused by all frequency conversion units is measured and compensated by software and finally precise navigation positioning is realized by the GPS chips. By the method, anti-interference capability of a satellite navigation system can be improved greatly.

The invention discloses a millimeter-wave air slot differential integrated antenna. The millimeter-wave air slot differential integrated antenna comprises five parts, namely, a differential feeding network, a radiation module, a directed radiation module, a bond wire compensation network and a back cavity air slot; each of the radiation module and the directed radiation module is composed of an even number of radiating patch units which are in bilateral symmetry; signals are divided and transmitted to each radiating patch unit through a differential line and a one-to-many T-shaped structure; the back surface ground part of the antenna is partially etched; an air cavity is formed in a base, so that the bandwidth of the antenna can be extended; the antenna is connected with a chip through bond wires; in order to compensate the inductive effect of the bond wires, a capacitive patch is arranged between the bond wires, so that an L(inductor)-C(capacitor)-L(inductor) network can be formed, and therefore, interconnection loss of the antenna and the chip can be reduced; and in order to extend the bandwidth of the antenna, parasitic patches are arranged beside the radiating patch units. According to the millimeter-wave air slot differential integrated antenna of the invention, a dielectric material of which the height is consistent with the height of the chip is adopted to design the antenna, and therefore, the sticking, bonding and packaging of the antenna and the chip can be benefitted.

A modular plug-in antenna array capable of low cost and automated manufacturing is disclosed. The antenna element is designed to work efficiently over a broadband with simplified assembly requirements and to be used in discrete or array applications. Plug-in antennas eliminate the need for external tools, and allow the antenna to be removed, for service, test, and ease of assembly. Many transceivers are assembled using printed circuit board techniques whereon electronic components are mounted using a pick and place process. The plug-in antenna connects directly onto the circuit board; with connectors that are compatible with a pick and place process and which are produced in mass quantities for the computer and telecommunications industry, thus yielding lower costs than traditional high performance RF coaxial connectors. With demands for higher antenna bandwidth, the disclosed simplified plug-in antenna provides an appropriate balance between performance and the ease of modular assembly, manufacture, and costs.

The invention discloses a 5G millimeter wave dual-band dual-array antenna, and the antenna comprises low- frequency and high-frequency antenna units arranged at intervals in sequence, wherein the low-frequency and high-frequency antenna units respectively comprise antenna model units in different sizes. Each antenna model unit comprises a five-layer structure, wherein the first layer is a metal patch of a loading slot, the second and third layers constitute a folded open circuit resonator for loading a short-circuit branch. The resonant and the metal patches of the loading slot are used for generating two reflection zero points so as to increase the bandwidth of the antenna. Through the even mode of the resonator, the resonator and the patches are coupled to generate controllable low-end and high-end radiation zero points, thereby improving the near-field and far-field isolation between the dual-array antennas to form two arrays which work at different frequencies and have two reflection zero points and two radiation zero points. Moreover, the two arrays are small in overall size and are isolated from each other. The coupling between the patches and the resonator is controlled by changing the size of the groove, thereby achieving a low profile design of the antenna.

The invention discloses a wide-band and high-gain WiFi (Wireless Fidelity) omnidirectional antenna, and mainly solves the problems of narrow band width, low gain, complex structure and poor omnidirectivity of the existing WiFi antennae. According to the wide-band and high-gain WiFi omnidirectional antenna disclosed by the invention, a PCB (Printed Circuit Board) substrate is designed that a copper foil is coated on each of an upper surface and a lower surface of the substrate; namely, copper foils which are provided with completely the same wiring are arranged on the upper surface and the lower surface of the substrate as irradiating bodies, and are provided with separate raised spots; a progressive matching segment is present between a feeding point and a first arm radiation unit; radiation units on the upper surface and the lower surface of the substrate are respectively connected with the raised spots by means of metallized through holes; and a loading unit is arranged at the top end of the antenna. According to the wide-band and high-gain WiFi omnidirectional antenna disclosed by the invention, the band width of the antenna can be widened effectively, without increasing size of the antenna, gain is increased and an deflection angle of a directional diagram is inhibited, a small-size WiFi antenna with high gain, wide frequency band, low cost and excellent omnidirectivity is realized on a F4B substrate; and the wide-band and high-gain WiFi omnidirectional antenna has the advantages of simple feeding manner, compact structure, easiness for processing and a wider application scope, and can be used for a 5G Hz WiFi frequency band communication system.