Query: Lte antenna

title: Integrated Millimeter Wave Wideband End Fire 5G Beam Steerable Array and Low Frequency 4G LTE Antenna in Mobile Terminals
abstract: In this paper, a novel technique of collocating a millimeter wave end fire 5G beam steerable array antenna with a low frequency planar inverted F antenna (PIFA) is presented. In this technique, the low frequency antenna can be transparent by using some grating strips between the low and high frequency antennas. A quad element mm wave array with end fire radiation patterns operating in 22 31 GHz is integrated with a dual band low frequency PIFA in a mobile terminal. The novelty of this paper is the collocation of a high frequency end fire 5G antenna array with an old generation low frequency antenna, such as 4G in small space in the mobile terminal, without interfering with the radiation pattern and impedance matching of both low and high frequency antennas. The proposed 5G antenna covers 22 31 GHz and can scan 50deg with the scan loss of better than 3 dB. The coverage efficiency of the proposed mm wave 5G antenna is better than 50% and 80% for a minimum gain of 4 and 0 dBi in 22 31 GHz, respectively. The gain of the high frequency antenna array is better than 9.5 dBi at 28 GHz. The low frequency antenna covers some practical 4G LTE bands from 740 960 MHz and 1.7 2.2 GHz bands. The measured results in both low and high frequencies agree well with the simulations.

title: A Multiband LTE Antenna with Resonant Rings
abstract: A multi band LTE antenna covering LTE, GSM and UMTS is proposed here for the demand of various mobile terminal devices. The antenna is a monopole micro strip patch antenna consisting of two conductor segments and appropriately bent to reduce the antenna size. Branches of different lengths resonate at different frequencies. A ring resonator composed of two split metal strips is introduced on both sides of the feeding metal strip to improve the performance of the antenna. The metal strip connects the upper and lower metal strips of the inner ring resonator and looks like a 'z' structure. The ground plane is slotted for greater gain. The simulation results show that the operating bandwidth of the antenna S11 curve less than 10 dB is 0.87 GHz 0.93 GHz (60 MHz) and 1.89 GHz 2.75 GHz (850 MHz) The bandwidth of the high frequency band produced can be well matched. The resonance point of the low frequency band is shifted and the bandwidth is reduced. The antenna can cover multiple frequency bands under a small size limit, reduces the occupation of the space of the mobile terminal device, and has universal applicability to different mobile terminals.

title: LTE Antenna Design for Mobile Phone With Metal Frame
abstract: A novel Long Term Evolution (LTE) antenna design for mobile phones with metal frame is proposed. In particular, in this design only the metal frame acts as the antenna radiating element, and the full band LTE is covered with the help of a bandpass filter, an inductor, as well as a matching circuit. An antenna prototype is fabricated and measured; the measured operating bands with S11 lower than 6 dB cover 698 960 MHz (LTE low band) and 1710 2690 MHz (LTE high band) Good agreement between the simulation and measurement is obtained.

title: A 3D LTE antenna for vehicular applications
abstract: A novel compact 3D antenna operating at LTE, GSM and UMTS frequency bands (790 2690 MHz) is proposed for vehicular applications. The antenna consists of a metal sheet properly cut and shaped to fit an overall volume of 50x50x30 mm3. A Planar Inverted F Antenna is designed to cover the lower frequency band (below 1GHz) while an integrated folded monopole adds higher frequency resonances. An elliptical shape pin is connected to a 50O input port to improve impedance matching, mainly at the higher frequencies. Preliminary numerical simulations in terms of reflection coefficient and gain are here presented and discussed.

title: A Novel Compact Dual Band LTE Antenna System for MIMO Operation
abstract: In this communication, we present a novel compact dual band antenna system for LTE multi input and multi output (MIMO) mobile handsets. The radiators consist of 3D Inverted F Antennas (IFAs) folded on the non metalized part of the Printed Circuit Board (PCB) and operating in the LTE 700 MHz band. A parasitic radiating element is also attached to the IFAs to operate in the LTE 2.5 2.7 GHz band. Two antennas are placed on a realistic PCB (100 x 40 mm2) for MIMO operation. Various antenna configurations are tested when moving their position on the PCB. Based on the highest port to port isolation criterion, two configurations are adopted and their performances are compared. Both simulated and measured results are shown to illustrate the MIMO capabilities of the proposed structures.

title: A Tunable Multiband LTE Antenna for Metal Rimmed Smartphone Applications
abstract: In this paper, a tunable multiband LTE antenna is designed for metal rimmed smartphone applications. The antenna only uses a broken metal ring, which comprises an IFA (Inverted F antenna) section and a parasitic section, and generates three resonant modes through this layout for the feeding point and shorting point. In addition, loading a matching circuit at the feeding point and a RF switch at shorting point of the IFA is used to switch low frequency to lower frequency. The bandwidth can completely cover 824 960 and 1710 2690 MHz. So the proposed antenna can work at GSM850, 900; DCS1800; PCS1900; WCDMA band 1, 2, 4, 5, 8; TD SCDMA band 34, 39; CDMA BC0, BC1 and LTE band 1, 3, 7, 38, 39, 40, 41. Also, the total size of the cellphone is 150mm x 75mm x 3.5 mm, which is very suitable for 4G slim smart mobile phone applications.

title: A compact LTE antenna design for mobile device with full metal housing
abstract: A compact LTE antenna is proposed to work for mobile phone with full metal housing. Antenna miniaturization and electromagnetic decoupling to metal housing are realized by a high band only antenna structure, feed matching inductor and two tunable techniques. The final antenna size is only 60x8x7 mm3 and measured bandwidth can cover LTE frequencies from 700 960 and 1710 2170 MHz. The free space measured efficiency is about 45% and 60% at low and high band, respectively. This antenna showed great potential for real phone application under metal housing environment.

title: Side edge LTE antenna with a narrow ground clearance for the smartphone
abstract: A T shape open slot antenna with a narrow ground clearance of 1.5 mm and a length of 76 mm along the side edge of the LTE smartphone is presented. This study applies the narrow region between the display panel and the casing of the smartphone to accommodate the LTE antenna. With the narrow ground clearance, the antenna can provide two operating bands of 746~960 MHz and 1710~2200 MHz to cover the LTE operation (for example, the LTE band 5, 8, and 13 for the low band and the LTE band 10, 23, and 25 for the high band) Details of the proposed side edge LTE antenna are described. The user's hand effect on the antenna performance in the two hand data mode is also studied.

title: Inkjet printed and folded LTE antenna for vehicular application
abstract: A multi band antenna suitable for Long term Evolution (LTE) is inkjet printed, and then folded around a cylindrical form. The plastic cylinder is also printed using additive manufacturing techniques, as a separate process. The antenna is based on a planar wideband monopole radiator concept with an additional resonator for the LTE700 frequency band. The aim is to study the potential of low cost additive manufacturing (AM) techniques for the development of vehicular antennas. Two antennas have been fabricated, one on paper substrate, and a second on polyethylene terephthalate (PET) substrate. The one on paper is tested as a planar monopole antenna on a large ground plane. The one printed on PET is shaped onto the cylindrical form. The main aim is to investigate the use of low cost inkjet printing techniques for the fabrication of disposable vehicular antennas that can be upgraded regularly. The antennas successfully operate at all LTE and mobile frequency bands. Finite different time domain simulations compare well with measurements.

title: On the design of a 3D LTE antenna for automotive applications based on MID technology
abstract: This paper presents the design of a long term evolution (LTE) antenna and its integration on the 3D surface of the mounting compartment of an automotive roof top antenna, using molded interconnect device (MID) technology. In the first step the design of the planar LTE antenna is shown. This antenna provides an input matching better than 10 dB in the desired frequency band and exhibits an omnidirectional radiation characteristic in the horizontal plane. Subsequently, this antenna is bent on the surface of a roof antenna housing. The effects of geometrical mapping of the planar antenna structure to the 3D surface in terms of input matching and radiation characteristics are analyzed. Based on these findings, a conformal and optimized two antenna system is introduced and discussed. A prototype realized by MID laser direct structuring (LDS) is presented and the measured antenna performance is compared to simulation results. An excellent agreement between measured and simulated results is observed. Finally, the prototype meets the specification requirements.