High-Gain Pattern Reconfigurable MIMO Antenna Array for Wireless Handheld Terminals

Chamok, Nowrin H.; Yılmaz, Mustafa Harun; Arslan, Hüseyin; Ali, Mohd. Hasan

doi:10.1109/tap.2016.2598201

Cited by 35 publications

(23 citation statements)

References 37 publications

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“…The previous approach is laborious, especially across wide frequency ranges, whereas the latter one is simple and fast to use. For this reason, many publications use the formula based on S-parameters to calculate the ECC (e.g., [23,28,29]). The problem related to characterising the ECC from simulated and/or measured S-parameters is that the formulas used in the calculations are strictly valid for antennas without Ohmic losses [16], but as mentioned in [29], they are a sufficient approximation for antennas with high efficiency.…”

Section: Multi-antenna Characteristicsmentioning

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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Section: Multi-antenna Characteristicsmentioning

confidence: 99%

Carrier Aggregation Compatible Mimo Antenna for Lte Handset

Rasilainen¹,

Lehtovuori²,

Boussada

et al. 2017

PIER C

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“…The constant omnidirectional pattern at all working time leads to a waste of radiation power. Many reconfigurable antenna solutions have been studied [9][10][11][12][13][14][15][16][17][18][19][20]. Literature [9] proposed the H-shaped resonator structure controlled by the p-i-n diodes to reconfigure the pattern of the driven element.…”

Section: Introductionmentioning

confidence: 99%

“…In [10], a circle planar reconfigurable antenna with various patterns is developed, achieving two operating frequencies and 6 beam directions, totally 12 operating modes is ready. Literature [11] puts forward a reconfigurable antenna array for some handheld terminals and MIMO applications, achieving a high gain. The antenna design in [12][13][14][15] has the horizontal azimuth-pattern-reconfigurable ability but limited states for the complex applications.…”

Section: Introductionmentioning

confidence: 99%

A Horizontal Azimuth Pattern-Reconfigurable Antenna Using Omnidirectional Microstrip Arrays for WLAN Application

Yang

et al. 2019

International Journal of Antennas and Propagation

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A horizontal azimuth pattern-reconfigurable antenna with configurable parasitic element arrays for WLAN applications is proposed in this paper. It consists of a control board, a central series-fed omnidirectional microstrip array, four configurable parasitic elements, a bottom conducting plate, and a top supporting plate. The omnidirectional microstrip array is adopted as an exciter, around which the four same parasitic element arrays are arranged at four corners. The p-i-n diodes as switches are placed between the parasitic element arrays and the conducting plate to control the fifteen radiation patterns of the proposed antenna. The parasitic element arrays are configured as reflectors or directors by switching the p-i-n diodes on or off. The bandwidth achieved ranges from 5.00 GHz to 5.27 GHz. A gain of 8.52 dBi is obtained when the antenna reaches the maximum gain in the H-plane at 5.2 GHz. Good agreements between the simulated and measured results were observed. The proposed parasitic structure which has the same structure with the driven element can enhance the horizontal azimuth gain of the antenna. Only 4 p-i-n diodes are used to produce up to 15 useful beam configurations with a gain range of 4.56-8.52 dBi at the horizontal azimuth.

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“…In [10] a pattern reconfigurable MIMO antenna with an operating frequency reconfigurable from 4 to 14 GHz has been presented for the application of mobile terminals. In [11] a high gain pattern reconfigurable MIMO antenna array has been presented for the frequency of 5 GHz. However, no pattern reconfigurable 3x3 MIMO antennas at LTE bands have been presented yet.…”

Section: Introductionmentioning

confidence: 99%

Pattern-Reconfigurable Mobile Terminal Antenna System for MIMO and Link Stabilization in LTE

Syrytsin

Vesterager²,

Nørgaard³

et al. 2018

12th European Conference on Antennas and Propagation (EuCAP 2018)

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In this paper, a pattern reconfigurable mobile phone antenna system for enhanced data rates in the LTE communication scheme is proposed. The three driven antennas are designed with a resonant frequency of 2.6 GHz (Band VII). Passive elements are utilized in the design in order to change the radiation pattern direction of the proposed antennas. The designed antennas are primarily made to obtain pattern reconfigurability in data mode, where the phone is held either vertically with one hand or horizontally with two hands. Seven different radiation pattern directions are achieved with the proposed antenna setup. With the use of RF switches and tuning devices, such as a programmable array of capacitors (PACs), this architecture can be implemented in handheld terminals. In this work, prototypes with fixed architecture and different lengths of passive elements are presented. Finally, the MIMO performance of the system is investigated by calculating the envelope correlation coefficients, which are under 0.25 in the band of interest.

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High-Gain Pattern Reconfigurable MIMO Antenna Array for Wireless Handheld Terminals

Cited by 35 publications

References 37 publications

Carrier Aggregation Compatible Mimo Antenna for Lte Handset

Carrier Aggregation Compatible Mimo Antenna for Lte Handset

A Horizontal Azimuth Pattern-Reconfigurable Antenna Using Omnidirectional Microstrip Arrays for WLAN Application

Pattern-Reconfigurable Mobile Terminal Antenna System for MIMO and Link Stabilization in LTE

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