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Now showing items 33 - 48 of 180

  • Mobile communication device and antenna structure therein

    A mobile communication device includes an antenna structure which includes a grounding element and an antenna element. There is a notch at an edge of the grounding element. The antenna element is disposed in the notch and includes a metal loop portion and a monopole antenna. The metal loop portion is electrically connected to the grounding element with at least one shorting point, such that a short-circuited closed metal loop is formed. The monopole antenna has a first end and a second end, wherein the first end of the monopole antenna is a feeding point connected to a signal source, and the second end of the monopole antenna is an open end surrounded by the closed metal loop.
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  • Mobile communication device and antenna structure thereof

    A mobile communication device having an antenna structure includes a grounding element and an antenna element. The grounding element includes a main ground and a protruded ground being connected to an edge of the main ground. Antenna element includes a feeding portion and a radiating portion. The feeding portion includes a feeding point, a first strip and a second strip. The first strip and the second strip are both connected to the feeding point. The radiating portion includes a first open end, a second open end and a shorting point which is connected to the protruded ground by a short-circuiting strip. There is a first coupling gap between the first strip and a first section of the radiating portion having the first open end. There is a second coupling gap between the second strip and a second section of the radiating portion having the second open end.
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  • Communication electronic device and antenna structure thereof

    A communication electronic device which comprises a grounding element and a slot antenna is provided. The slot antenna is formed by a feeding element, a first slot, a second slot, and a third slot. The first slot is an open slot, which has an open end at the first side edge and a closed end extended toward the interior of the electrical conductor. The second slot is an open slot, which also has an open end at the first side edge and a closed end extended toward the interior of the electrical conductor. The second slot is substantially parallel to the first slot and is closer than the first slot to the grounding element. The third slot is a closed slot, whose two closed ends are all in the interior of the electrical conductor. The third slot is aligned between the first slot and the second slot.
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  • Communication electronic device and antenna structure thereof

    A communication electronic device includes a grounding element and an antenna element. There is a first notch, a second notch and a first protruded portion disposed at an edge of the grounding element, and the first notch and the second notch are not located at corners of the edge of the grounding element. The first protruded portion is located between the first notch and the second notch. The antenna element and the grounding element are disposed on different planes. The antenna element has a projection on the grounding element, and the projection covers a portion of the first protruded portion, a portion of the first notch and a portion of the second notch.
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  • Mobile communication device and antenna device

    A mobile communication device for operating in LTE and WWAN bands is provided in the invention. The mobile communication device includes a system circuit board and an antenna. The system circuit board includes a system ground plane. The antenna includes: an antenna substrate, substantially parallel to the system ground plane; a first radiation element, disposed on the antenna substrate; a second radiation element, disposed on the antenna substrate; an antenna ground plane, disposed on the antenna substrate, and coupled to the system ground plane; and a transmission line, disposed on the antenna substrate, coupled to the first and second radiation elements, and having a feed point. The mobile communication device is further configured to accommodate a data transmission component.
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  • On the isolation of two LTE700/2300/2500 antennas in the laptop computer

    Kin-Lu Wong   Po-Wei Lin and Tsung-Ju Wu  

    A simple technique for achieving enhanced isolation between two long-term evolution (LTE)700/2300/2500 antennas for the multiple-input multiple-output operation in the laptop computer is presented.The two antennas are mounted along the top edge of the supporting metal plate, which is generally disposed on the inner surface of the upper cover of the laptop computer. Improved isolation (measured S21 better than −30 dB in the LTE700 band and −26 dB in the LTE2300/2500 bands) between the two antennas is easily achieved by adjusting the supporting metal plate to have a length of about 110 mm in the longitudinal direction (orthogonal to the lateral direction or the top-edge direction of the supporting metal plate). Because the length is close to a quarter wavelength of a frequency in the LTE700 band, the excited surface currents in the supporting metal plate will become stronger in the longitudinal direction, which hence causes weaker surface currents flowing along the top edge of the supporting metal plate. This behavior leads to enhanced isolation between the antennas mounted along the top edge of the supporting metal plate. Details of the proposed isolation technique are described, and the obtained results are presented and discussed.
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  • WWAN/LTE printed slot antenna for tablet computer application

    Kin-Lu Wong   Wun-Jian Lin  

    Abstract A printed slot antenna comprising two quarter-wavelength slots of different lengths and a half-wavelength slot for eight-band wireless wide area network/long term evolution operation in the tablet computer is presented. The two quarter-wavelength slots are open slots or monopole slots, and the half-wavelength slot is aligned in-between the two quarter-wavelength slots. The three slots are excited using a two-strip feedline which is printed on the opposite surface of the printed slots. The proposed three-slot configuration can lead to two wide operating bands, with the lower one covering the 704–960 MHz band and the upper one covering the 1710–2690 MHz band. Good radiation efficiency for frequencies over the operating bands is obtained. The simulated body specific absorption rate values of the antenna in the bottom face, landscape and portrait orientations to the flat phantom in the body specific absorption rate testing model also meet the limit of 1.6 W/kg for 1-g tissue. Details of the results are presented. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:44–49, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26509
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  • Small planar internal wireless wide area network tablet computer antenna

    Kin-Lu Wong   Tsung-Ju Wu  

    Abstract A planar penta-band wireless wide area network (WWAN) antenna with a small size of 12 × 35 mm2 for application in the tablet computer as an internal antenna is presented. The antenna is printed on a 0.8-mm thick FR4 substrate on which a radiating portion and an antenna ground for accommodating a matching circuit are formed. The antenna is mounted at the top edge of the display ground which supports a 9.7-inch display for the tablet computer. The antenna's radiating portion comprises a feeding strip, a parasitic strip short-circuited to the antenna ground, and a printed distributed parallel resonant circuit. The latter two contribute a 0.25-wavelength dual-resonance mode at about 850 MHz for the GSM850/900 operation. The feeding strip generates a 0.25-wavelength resonant mode at about 1800 MHz to combine with a higher-order resonant mode at about 2200 MHz contributed by the shorted strip for the GSM1800/1900/UMTS operation. Additionally, the matching circuit on the antenna ground replacing the function of the matching circuit that is usually disposed on the system circuit board and provides a convenient means to adjust the impedance matching of the antenna to cover the desired operating bands. Owing to the new configuration of the antenna, the size of the proposed antenna is about the smallest among the internal WWAN antennas that have been reported for the tablet or laptop computer applications. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:426–431, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26559
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  • Folder-type mobile communication device

    The present invention is related to a folder-type mobile communication device. The device comprises a first dielectric substrate, a first ground plane disposed on the first dielectric substrate, a second dielectric substrate, a second ground plane disposed on the second dielectric substrate, an antenna element, a metal line, and a band-stop circuit. The antenna element is located near the first ground plane and is electrically connected to a source on the first dielectric substrate. The second ground plane is electrically connected to the first ground plane through the metal line. The band-stop circuit is located either on the first ground plane or on the second ground plane. The band-stop circuit includes a slit, a capacitive element, and an inductive element. The slit is near the metal line. The capacitive element is electrically connected to the two sides of the slit, and the inductive element is electrically connected to the two sides of the slit such that the inductive element and the capacitive element form a parallel LC resonant circuit. Therefore, the band-stop circuit generates a parallel resonance at a specified frequency.
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  • Wwan/lte printed loop tablet computer antenna and its body sar analysis

    Kin-Lu Wong   Wan-Jhu Wei   Liang-Che Chou  

    Abstract A WWAN/LTE printed loop antenna for tablet computer application is presented.The printed loop antenna is a half-wavelength loop strip coupled-fed by a patch monopole, which performs not only as a coupling feed but also as an efficient radiator for the antenna. By embedding a printed distributed inductor in the loop strip, dual-resonance excitation of the half-wavelength mode of the coupled-fed loop antenna is obtained, which forms the antenna's lower band at about 800 MHz to cover the LTE700/GSM850/900 operation (704–960 MHz). The antenna's upper band is formed by both the resonant modes contributed by the patch monopole and the higher order resonant modes contributed by the loop strip. The upper band shows a large bandwidth (>1 GHz) to cover the GSM1800/1900/UMTS/LTE2300/2500 operation (1710–2690 MHz). Further, with a planar and compact structure (12 × 75 mm2), the antenna is suitable to be disposed in the limited space inside the tablet computer and meets the body specific absorption rate (SAR) requirement (<1.6 W/kg for 1-g body tissue) for practical applications. Details of the proposed antenna and its body SAR results are presented. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2912–2919, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26377
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  • Internal mobile phone antenna array for LTE/WWAN and LTE MIMO operations

    Kin-Lu Wong   Ting-Wei Kang   Ming-Fang Tu  

    Abstract An antenna array comprising a main antenna for eight-band LTE/WWAN operation and an auxiliary antenna to combine with the main antenna for LTE MIMO operation in the mobile phone is presented. Both the main and auxiliary antennas are disposed at the bottom edge of the system circuit board of the mobile phone and separated by a protruded ground. The main and auxiliary antennas can respectively fit in two small no-ground regions of 15 × 30 mm2 and 15 × 20 mm2 on the system circuit board, while the protruded ground in-between the two antennas has a width of 10 mm for mounting a USB data port. The main antenna covers the 704–960/1710–2690 MHz bands for eight-band LTE/WWAN operation, and the auxiliary antenna covers the 704–787/2300–2690 MHz bands such that the main and auxiliary antennas together can perform LTE MIMO operation in the LTE700/2300/2500 bands. The proposed antenna array is fabricated and tested. Results are presented and discussed. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26038
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  • WWAN/LTE Handset Antenna with Shaped Circuit Board, Battery, and Metal Midplate

    Kin-Lu Wong   Hsuan-Jui Chang   Fang-Hsien Chu   Wei-Yu Li and Chun-Yih Wu  

    An onboard printed WWAN/LTE antenna of simple structure disposed in a small clearance of 8 × 36 mm2 in the ground plane of shaped circuit board in a slim handset is presented. The shaped circuit board has a large rectangular notch such that the battery of the handset can be embedded therein to decrease the thickness of the handset. It is shown that, compared to the traditional simple circuit board, the shaped circuit board can lead to much enhanced bandwidth of the antenna disposed thereon. This is mainly because stronger surface currents on the ground plane of the shaped circuit board can be excited, which greatly helps improve the operating bandwidth of the antenna disposed thereon. By properly short-circuiting the metal enclosing of the battery and the metal midplate that can be used to provide the handset with structural support, stronger excited surface currents on the ground plane of shaped circuit board can still be obtained. The proposed design makes a simple, small-size printed inverted-F antenna capable of providing two wide operating bands to cover the GSM850/900 bands (824–960 MHz) and GSM1800/1900/UMTS/LTE2300/2500 bands (1710–2690 MHz). Further, the proposed design can provide good antenna efficiency and meet the specific absorption rate regulations of less than 1.6 W/kg for 1-g head tissue as well. Detailed results of the proposed design are presented and discussed.
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  • Multiband antenna and communication device having the same

    A multiband antenna for a communication device is disclosed. The multiband antenna comprises a dielectric substrate, a ground portion, and a radiating metal portion. The dielectric substrate comprises two surfaces. The ground portion comprises a first ground plane, a second ground plane, and a connecting metal strip. The first ground plane is on one of the surfaces of the dielectric substrate and has a first connecting point and a shorting point. The second ground plane is near the first ground plane and has a second connecting point. At least one part of the connecting metal strip is on one surface of the dielectric substrate. The connecting metal strip has one end connected to the first connecting point and the other end connected to the second connecting point. The radiating metal portion is connected to the dielectric substrate, without overlapping the first ground plane. The radiating metal portion comprises a radiating section having one end connected to the shorting point and the other end as an open end; and a feeding section having one end connected to a signal source and the other end as an open end, wherein the open end of the feeding section has a spacing of less than 3 mm to the radiating portion.
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  • Shorted monopole antenna

    The present invention discloses a shorted monopole antenna comprising a radiating portion comprises a first metal portion and a second metal portion and is located on the dielectric substrate, without overlapping with the ground plane. The first metal portion comprises a coupling section formed by bending the front portion of the first metal portion into two adjacent sections with a coupling gap. A first end of the feeding portion is electrically connected to the first metal portion. A second end of the feeding portion is the antenna's feeding point. The shorting portion is disposed on the dielectric substrate, without overlapping with the ground plane. A first end of the capacitive element is electrically connected to the antenna's feeding point. A second end of the capacitive element is electrically connected to a source.
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  • Multiband antenna

    A multiband antenna includes a ground plane, a dielectric substrate and a radiating metal portion. The dielectric substrate is located at one side edge of the ground plane. The radiating metal portion is disposed on one surface of the dielectric substrate and includes a first metal portion and a second metal portion. The first metal portion is substantially of an L-shape. One end of the first metal portion is adjacent to the side edge of the ground plane and is the antenna's feeding point connected to a signal source, and the other end of the first metal portion is an open end. The second metal portion comprises a U-shape portion. The second metal portion includes a first open end and a second open end, which are respectively located on two opposite sides of the open end of the first metal portion. The first open end has a first coupling gap between the first open end and the open end of the first metal portion, and the second open end has a second coupling gap between the second open end and the open end of the first metal portion. The second metal portion is further short-circuited to the ground plane by a shorting metal line.
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  • Multiband antenna

    A multiband antenna comprises a ground plane, a substrate, and a radiating metal element, wherein a side of the substrate is substantially adjacent to a side of the ground plane; the radiating metal element is on a surface of the substrate. The radiating metal element comprises a radiating portion having a slit, a shorting portion having a first end electrically connected to the radiating portion and a second end electrically connected to the ground plane, and a feeding portion; the feeding portion comprises an antenna feeding point for electrically connecting to a signal source, wherein a first spacing is formed between the feeding portion and the radiating portion, and a second spacing is formed between the feeding portion and the shorting portion.
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