216 results about "Antenna miniaturization" patented technology

Provided are a Planar Inverted-F Antenna (PIFA), a Radio Frequency Identification (RFID) tag using the PIFA. The present invention miniaturizes the antenna by using a meander line extended from a radiating edge of a radiation antenna and adjusting a resonant frequency of the antenna, and it performs impedance matching by adjusting capacitive reactance of the antenna. Also, it can perform impedance matching by using a stub having a slot formed therein and adjusting inductive reactance and capacitive reactance of the antenna. The present invention miniaturizes the antenna by using a plurality of shorting plates for shorting the radiation patch from a grounding surface and adjusting the resonant frequency of the antenna. The present invention also provides an inexpensive PIFA antenna with an excellent radiation efficiency by forming the radiation patch in the form of metal sheet in the antenna and floating the radiation patch in the air.

A multi-antenna module comprises a ground plane, a primary conductor, a secondary conductor and a plurality of coupling conductors, wherein the framework of the parallel primary radiation arm and secondary radiation arm can infinitely expand the number of antenna units in the same antenna structure. The capacitive coupling effect of parallel radiation arms and the inductance of the radiation arms themselves can effectively reduce the signal interference between antennae, whereby a plurality of antennae can be integrated to achieve antenna miniaturization. The primary conductor, the secondary conductor and the coupling conductors are all connected to the same ground plane, whereby the layout space is reduced, and the multi-antenna module is easy-to-assemble for various electronic devices.

The invention relates to an ultra broadband dual polarization low frequency oscillator unit and a multi-frequency-range array antenna. The ultra broadband dual polarization low frequency oscillator unit comprises an oscillator, a pedestal plate, a feed needle and radiation arms, wherein two end of the oscillator are respectively connected with the pedestal plate and the radiation arms; the feed needle is arranged on the oscillator; the oscillator includes four oscillator sheets which are clamped orthogonally; corresponding grooves and bosses are respectively arranged at the center of the blades of the adjacent two oscillator sheets; any two non-adjacent oscillator sheets can be parallel to each other through clamping of the bosses and the grooves; the number of the radiation arms is 4; every two radiation arms are arranged orthogonally; a fine copper foil and a crude copper foil cover the surface of two ends of each radiation arm; the fine copper foils and the crude copper foil are respectively equivalent to the inductance and the capacitance under high frequency; and the middle segment of each radiation arm is also provided with a double-faced copper foil with a through hole. As the oscillator arm with a resonance circuit is used, the influence of existence of a low frequency oscillator on a high frequency oscillator directional diagram is eliminated; the irrelevance of the antenna wave beam is improved; and the overall performance of the antenna is improved so that the antenna can be miniaturized.

The disclosure concerns an antenna with open loops and multipath current distribution to achieve ultra wideband characteristics and antenna miniaturization, while simultaneously keeping high performance for a more reliable WAN communication, with higher data transfer, less dropping connections and improved sensitivity. To further reduce spatial requirements, the antenna may be incorporated on a flex substrate for bending with the contour of a device housing or the like.

Disclosed are ultra wideband radio transmitter, ultra wideband radio receiver, and ultra wideband radio communication method capable of securing higher transfer rate and communication quality than conventional ones while avoiding a band where communication signals are concentrated, and capable of miniaturizing an antenna. In a transmitter, a delay time controller (12) outputs a periodic pulse to matched filters 11-1 and 11-2 when transmission data is 1, and outputs the periodic pulse to matched filters 11-1 and 11-3 when the transmission data is 0. The matched filter 11-1 outputs reference signal, the matched filter 11-2 outputs first data signal ahead of the reference signal, and the matched filter 11-3 outputs second data signal behind the reference signal. An adder (13) adds up these, a mixer (21) frequency-converts output of the adder using a local signal received from a local oscillator (23), and an antenna (6) radiates output of the mixer (21).

The invention relates to a miniaturized and circularly-polarized RFID (Radio Frequency Identification) reader-writer antenna, comprising a micro-strip rectangular annular antenna (1), a feed matched network (2), a planar miniaturized coupler (3), an input port (4), an isolation port (5), a medium substrate (6), a plastic screw (7) and an annular reflector (8). Compared with the conventional micro-strip antenna, the size of the micro-strip rectangular annular antenna is reduced by a half; the designed antenna is easily matched to 50ohm through a feed coupling manner; the circular polarization is realized by the planar miniaturized coupler; and the planar miniaturized coupler is integrated in the antenna, and thus the size of the antenna is not influenced. The conventional floor is replaced by the annular reflector, so that the antenna forms a unidirectional radiation pattern, and the size of the antenna is greatly reduced and almost the same as that of the reflector. Therefore, the miniaturized and circularly-polarized RFID reader-writer antenna can be applied to a handheld RFID reader-writer and also can be used for miniaturized design of antennas of other frequency ranges.

The embodiment of the invention provides an antenna oscillator, an antenna unit and an antenna, belonging to the technical field of communication. The antenna oscillator comprises two pairs of oscillators; each pair of oscillators comprises two frame oscillators; each frame oscillator is provided with an opening and internally provided with a linear oscillator; one end of the linear oscillator isopposite to the opening of the frame oscillator and keeps a certain distance; the other end of the linear oscillator is electrically connected with a body at the opposite end of the opening of the frame oscillator; the two frame oscillators of each pair of oscillators are fixedly connected through the electrically connected linear oscillators in each frame oscillator; and the two oscillators are mutually connected through parts for fixing linear oscillators in the frame oscillators in each pair of oscillators. The antenna oscillator can reduce the plane beam width of the oscillators so that the antenna unit made by utilizing the antenna oscillator can form the needed beam width by only matching with a smaller reflection plate, and the made antenna is minimized.

Provided are an array antenna capable of miniaturizing an array antenna while reducing side lobes, a tag communication device and tag communication system provided with the array antenna, and a beam control method for the array antenna. When XY coordinates and a feeding phase of each antenna element (21a to 21d) are defined as the antenna element (21a) (0, Y1)·φ1, the antenna element (21b) (−X1, 0)·φ2, the antenna element (21c) (X2, 0)·φ3, the antenna element (21d) (0, −Y2)·φ4, wavelengths of λ, and directivity directions of θ, each of the feeding phases is set so that the following conditional equations φ1=φ4, φ2=2π·X1·sin(θ)/λ+φ1, φ3=φ1−2π·X2·sin(θ)/λ are all satisfied.

The invention discloses a T shape surrounding type multi-frequency mobile phone antenna and provides a planar monopole mobile phone antenna which is simple in structure, easy to machine, low in manufacturing cost and capable of meeting the requirements for miniaturization and multiple frequencies and is capable of meeting the requirement for the 2G frequency band, the 3G frequency band and the 4G frequency band. The T shape surrounding type multi-frequency mobile phone antenna comprises a dielectric layer, grounded metal sheets and a radiation metal sheet, wherein the radiation metal sheet is directly printed on the upper surface of the dielectric layer, the T-shaped radiation metal sheet achieves direct feed, and the metal sheets surrounding the T-shaped radiation metal sheet are directly grounded. According to the T shape surrounding type multi-frequency mobile phone antenna, multiple frequency bands can be covered through the coupling between the T-shaped radiation metal sheet which can achieve direct feed and the grounded metal sheets which surround the radiation metal sheets, large bandwidth is achieved, miniaturization and multiple frequencies of the mobile phone antenna are achieved, the structure is extremely simple, and a lumped element and special substrate materials do not need to be loaded. The T shape surrounding type multi-frequency mobile phone antenna is suitable for 2G/3G/4G ultra-thin smart phones.

Disclosed is a multiple meander strip monopole antenna, which can have a broad bandwidth and easily miniaturize the antenna by using a meander structure. A grounding conductor plate is coupled to the under face of a dielectric base plate. A radial cross-strip is disposed symmetrically at the center of the upper surface of the dielectric base plate. Each radiating member of a multiple radiator is connected to the end portion of each corresponding branch of the radial cross-strip and stands substantially perpendicular to the base plate. Each radiating member is composed of a vertical strip section having a tapered structure, in which its width is progressively widened upwardly for an impedance matching and at least one meander strip section connected integrally to the upper end of the vertical strip section. When a feeding is carried out at the center of the radial cross-strip, a signal radiated from the multiple radiator is cancelled out in the axial direction of θ=0° and a radiation gain is increased as θ increases, thereby providing a conical beam radiation pattern. A broad bandwidth from 2.9 GHz to 10.85 GHz can be achieved and an excellent monopole radiation pattern having the same gain in all directions can also be achieved.

The invention discloses a small high-isolation and wide-band antenna adopting differential feed and multilayer patch structures. The antenna comprises a pair of multilayer patch antennae which have the same structure and are orthogonally arranged back to back, wherein each multilayer patch antenna consists of three layers of medium plates and four layers of circuits. The antenna is applied to mobile communication. The differential feed structure well prevents the problem of cross polarization of an ordinary antenna, orthogonal arrangement further acquires higher isolation, and meanwhile, due to the adoption of the multilayer patch structure, two similar resonant frequencies are generated, and relatively large working band width is realized. The antenna is small in cross polarization, high in isolation and relatively large in band width, and the design conflict between antenna miniaturization and the wide frequency band, and between miniaturization and high isolation is well overcome. The antenna is applicable to mobile communication scenes, such as a compact repeater station and a small-power base station. The design is novel, creative and practical.

An antenna is fabricated using an M-type hexaferrite, such as a tin (Sn) and zinc (Zn) substituted M-type strontium hexaferrite (Sn/Zn-substituted SrM: SrFe_12−2xZn_xSn_xO₁₉), thereby enabling antenna miniaturization, broad bandwidth, and high gain. In one embodiment, an antenna system has a substrate and a chip antenna formed on the substrate. The system also has a conductive radiator contacting the chip antenna, and the chip antenna comprises an M-type strontium hexaferrite for which Fe cations are substituted with tin (Sn) and zinc (Zn) to achieve soft magnetic properties for the antenna. Thus, the coercivity and permeability are lower and higher, respectively, than those of pure SrM. Such fabricated hexaferrite chip antennas have broadband characteristics and show good radiation performance at various frequencies, including in the GHz frequency range.

The invention discloses a printed broadband terminal antenna, and mainly solves a problem that an antenna in the prior art cannot satisfy people's requirements of broadband and miniaturization of the antenna at the same time. The printed broadband terminal antenna comprises a printed circuit board, a printed board metal platform disposed on a surface of the printed circuit board, and also comprises a first bending metal strips group and a second bending metal strips group disposed on the other surface of the printed circuit board, a microstrip feeder connected with an end of the first bending metal strips group, and an earthing device connected with the second bending metal strips group. The second bending metal strips group has a semi-enclosed cyclic structure and surrounds the first bending metal strips group. With the above scheme, the printed broadband terminal antenna achieves an objective of realizing antenna miniaturization while the bandwidth is guaranteed, and has very high utility value popularization value.

The invention provides a radiation structure and an array antenna. The radiation structure comprises a radiation fin with a radiation slot in the middle. The radiation slot consists of a transverse slot and a longitudinal slot, which are communicated with each other and are cross-orthogonal. The length of the transverse slot and the length of the longitudinal slot are less than the length of the radiation fin in the extending direction of the corresponding radiation slot. By adding the radiation slot to the radiation fin, the radiation structure can produce two kinds of radiation synchronouslywhen working in an antenna system, so as to achieve an effect of polarization vector superposition enhancement. Thus, the same radiation efficiency and radiation gain of the multi-layer patch structure in the traditional antenna can be achieved by only one layer of radiation fin, fewer components are used, the structure is simple, the antenna profile can be reduced, and antenna miniaturization isfacilitated.

The invention discloses a multi-frequency common base station antenna comprising a reflection plate, a low-frequency radiating unit and a high-frequency radiating unit which are arranged on the reflection plate and a dual-frequency combiner which is connected with the high-frequency radiating unit. The dual-frequency combiner is connected with the high-frequency oscillators in the two arrays of the target high-frequency radiating unit in the high-frequency radiating unit in a one-to-one way to multiplex the high-frequency oscillators. The feeding end of the dual-frequency combiner is connectedwith the feeder network corresponding to the two frequency bands of the target high-frequency radiating unit. Therefore, the high-frequency oscillators are multiplexed by the dual-frequency combinerso as to realize a wider working frequency range without increasing the size of the reflection plate, and thus the volume and the size of the antenna are small and the antenna meets the requirements of miniaturization and multi-frequency of the antenna.

The invention discloses a single-trapped-wave ultra-wide-band monopole antenna which comprises a dielectric substrate. A grounding plate is arranged on the lower surface of the dielectric substrate, a radiation patch and a micro-strip feeder line connected with the radiation patch are arranged on the upper surface of the dielectric substrate, and the micro-strip feeder line is etched with a band-elimination resonance unit. The lower portion of the radiation patch is provided with a through hole penetrating through the radiation patch. The micro-strip feeder line of the single-trapped-wave ultra-wide-band monopole antenna is etched with a band-elimination resonance unit, has good trapped-wave properties and can effectively inhibit mutual interference between an ultra-wide band system and a WLAN system, and worsening of radiation characteristics of the antenna due to a mode of etching and grooving on the radiation patch is avoided. The band-elimination resonance unit is simple in structure, compact, small and exquisite and convenient to ingrate, the size of the whole antenna is not additionally increased, and antenna miniaturization can be achieved. The antenna has the advantages of being wide in bandwidth, small in size, low in cost and easy to process and has a good directional diagram in a whole frequency band range.

The invention discloses a mini-type multi-band frequency mobile phone antenna and provides a planar monopole mobile phone antenna which is small in size, easy to manufacture, low in manufacturing cost and capable of meeting the multi-frequency requirement and meeting the requirement of the frequency bands of GSM850/900/1800/1900, UMTS and LTE2300/2500 at the same time. The antenna comprises a dielectric plate, an earth plate and a radiation metal sheet set, wherein the radiation metal sheet set is directly printed on the upper surface of the dielectric plate; an inverted-L-shaped radiation metal sheet directly carries out feed, one directly grounded bent radiation metal sheet is divided into two branches after being folded by several times, the multiple frequency bands can be covered with coupling between the directly fed inverted-L-shaped radiation metal sheet and the grounded radiation metal sheet set, the large bandwidth is achieved, the miniaturization and multiple frequencies of existing mobile phone antennas are achieved, and lumped elements and special substrate materials do not need to be loaded. The mini-type multi-band frequency mobile phone antenna is applicable to 2G/3G/4G mobile phones.

The invention provides a novel small-size multi-input multi-output antenna. Under the condition that the existing antenna meets a better antenna isolation degree, the size of a quarter of a work wavelength is still larger relatively to a cell phone terminal. The novel small-size multi-input multi-output antenna comprises a base, two single antennas and a filter structure, wherein the two single antennas and the filter structure are arranged on the base; and the two single antennas are located above the filter structure and are symmetrically arranged. The novel small-size multi-input multi-output antenna has a compact structure and can work under three frequency ranges including 2.42 GHz, 3.43 GHz and 5 GHz; and meanwhile, the antenna in each frequency range has good isolation degree, bandwidth and gain, meets the requirements of a cell phone on antenna miniaturization and an MIMO (Multi-Input Multi-Output) technology, and can be used for the cell phone terminal..