Neutralized Coupling Elements for MIMO Operation in 4G Mobile Terminals

Cihangir, Aykut; Ferrero, Fabien; Jacquemod, G.; Brachat, P.; Luxey, Cyril

doi:10.1109/lawp.2014.2298392

Cited by 61 publications

(33 citation statements)

References 10 publications

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“…To solve the coupling problem between two closely spaced antennas, many MIMO antenna technologies to improve the isolation thereof have been reported. It is noted that the reported MIMO antenna technologies generally require some spacing between two antennas, with and without external decoupling structures added in the spacing to achieve enhanced isolation.…”

Section: Introductionmentioning

confidence: 99%

High‐isolation conjoined loop multi‐input multi‐output antennas for the fifth‐generation tablet device

Wong

Lin

2018

Micro & Optical Tech Letters

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Two coupled‐fed loop antennas with a conjoined capacitor‐embedded section to achieve compact size and high isolation for the fifth‐generation (5G) multi‐input multi‐output (MIMO) operation in the tablet device are presented. The two conjoined loop MIMO antennas cover the 5G band of 3300‐4200 MHz, which is considered to be the largest contiguous frequency range potentially available for 5G mobile broadband services below 6000 MHz. The conjoined capacitor‐embedded section not only functions as a part of the resonant path of the two loop antennas but also behaves like a band‐pass resonant structure in the operating band. The latter makes the capacitor‐embedded section to have much lower impedance in the operating band, as compared to that of a simple strip section. This makes it capable of effectively attracting the surface currents on the ground plane excited by one loop antenna to be away from the feed port of the other loop antenna. The two loop antennas can hence exhibit high isolation, even though the two antennas are conjoined to have a simple integrated planar structure of compact size. The envelope correlation coefficient (ECC) of the two conjoined loop antennas is also very small, less than 0.1 in the operating band.

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Section: Introductionmentioning

confidence: 99%

High‐isolation conjoined loop multi‐input multi‐output antennas for the fifth‐generation tablet device

Wong

Lin

2018

Micro & Optical Tech Letters

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“…During the design, the aim was to achieve a mutual coupling level from −8 to −10 dB. This is a practically feasible value, as the level of mutual coupling should typically be from −6 to −10 dB or better [19][20][21][22]. Compared to [13], where identical main and diversity antennas are used, the mutual coupling has reduced at LB.…”

Section: Impedance Matching and Mutual Couplingmentioning

confidence: 99%

Carrier Aggregation Compatible Mimo Antenna for Lte Handset

Rasilainen¹,

Lehtovuori²,

Boussada

et al. 2017

PIER C

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Abstract-This paper proposes a two-element LTE MIMO handset antenna with physically different main and diversity antennas. The performance of the design is studied theoretically and experimentally. The investigated design utilises physically different main and diversity antennas to improve especially the low-band MIMO performance. A Combined Parasitic-coupled, Aperture-Matched (CPAM) antenna is used as the main antenna, and the diversity antenna is a simple Capacitive Coupling Element (CCE) design. The antenna covers the LTE bands from 698-960 MHz and 1710-2690 MHz with fixed matching circuits suitable for low-band (LB) Carrier Aggregation (CA). Measured total efficiency of the antennas is from −3 to −6 dB and −2 to −5 dB at the low and high bands, respectively. In the MIMO case, envelope correlation coefficient (ECC) and multiplexing efficiency (η mux ) are studied also from measurements.

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“…No external decoupling structures are required for the two conjoined LTE M/HB antennas in this study to achieve enhanced isolation. This is different from the conventional MIMO antennas that are usually separated and require additional decoupling structures between the two antennas to achieve high isolation …”

Section: Introductionmentioning

confidence: 99%

One LTE LB and two conjoined LTE M/HB MIMO antennas with a compact symmetric frame structure at the short edge of the metal‐framed smartphone

Lin

Barani

2019

Micro & Optical Tech Letters

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The metal‐frame long‐term evolution (LTE) antennas with a compact symmetric frame structure at the short edge of the metal‐framed smartphone are presented. The proposed metal‐frame antennas cover the LTE low band (LB) in 824~960 MHz and two LTE middle/high bands (M/HBs) in 1710~2690 MHz. The LTE LB antenna uses a short metal‐frame section of 41.8 mm (about 0.12 wavelength at 824 MHz). The two LTE M/HB antennas together use a continuous metal‐frame section of 41.8 mm (about 0.24 wavelength at 1710 MHz), same as the LTE LB antenna. The two LTE M/HB antennas show low envelope correlation coefficient (ECC) of <0.1 in 1710~2690 MHz, owing to using a capacitor‐loaded shorting strip for the two antennas conjoined to achieve a compact and decoupled structure. The low ECC allows the two LTE M/HB antennas to be promising for 2 × 2 multi‐input multi‐output operation.

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Neutralized Coupling Elements for MIMO Operation in 4G Mobile Terminals

Abstract: International audienc

Cited by 61 publications

References 10 publications

High‐isolation conjoined loop multi‐input multi‐output antennas for the fifth‐generation tablet device

High‐isolation conjoined loop multi‐input multi‐output antennas for the fifth‐generation tablet device

Carrier Aggregation Compatible Mimo Antenna for Lte Handset

One LTE LB and two conjoined LTE M/HB MIMO antennas with a compact symmetric frame structure at the short edge of the metal‐framed smartphone

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