Reconfigurable monopole array with MEMS switches for MIMO systems

Mowlér, Marc; Khalid, Mahnoor; Lindmark, B.

doi:10.1109/aps.2008.4619176

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…Quarter-wavelength vertical monopole antenna arrays, which are popular in both civil and military applications, are used in various applications due to their ease of construction and low cost. Examples of use include personal wireless devices, unmanned devices, satellite payloads, aircrafts, automobiles, wireless sensor nodes, and MIMO-based handheld and rooftop-mounted access points of wireless local area network/WiFi [2][3][4][5][6]. They are also popular due to their known radiation characteristics, simplicity of matching their impedances to 50 Ω feed lines, and typical 10-dB return loss bandwidths of 15-20%, depending on the wire radius [2,3].…”

Section: Introductionmentioning

confidence: 99%

Miniaturised MIMO antenna array of two vertical monopoles embedded inside a planar decoupling network for the 2.4 GHz ISM band

Isaac

Al‐Rizzo

Yahya

et al. 2019

IET Microwaves, Antennas & Propagation

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This study introduces a fundamentally new approach to suppress mutual coupling among two closely‐spaced vertical monopole elements of a multiple‐input multiple‐output antenna array. The 40 × 40 × 1.27 mm decoupling and matching element consists of a single planar ring resonator acting as a stop‐band filter along with two tuning strips printed on an ungrounded substrate surrounding a two‐element co‐planar waveguide‐fed monopoles separated by 8 mm (λ0/16) at 2.45 GHz. Measurements reveal 14.2% bandwidth centred at 2.395 GHz over which the decoupling is below 20 dB, and −10‐dB impedance bandwidth of 19.5% centred at 2.36 GHz. An improvement of 43 dB in isolation is observed at a frequency of 2.38 GHz. It is shown that the decoupled array provides a total realised gain of 1.69 dBi with excellent diversity performance as demonstrated by the low envelope correlation coefficient and improved link efficiency in highly‐correlated channel environments due to the spatially orthogonal 3D radiation patterns. The capacity offered by the decoupled array is enhanced by 50, 22, 18 and 12% at signal‐to‐noise ratios of 5, 20, 30, and 50 dB, respectively, as compared to the coupled array in an urban micro‐channel spatial model.

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Section: Introductionmentioning

confidence: 99%

Miniaturised MIMO antenna array of two vertical monopoles embedded inside a planar decoupling network for the 2.4 GHz ISM band

Isaac

Al‐Rizzo

Yahya

et al. 2019

IET Microwaves, Antennas & Propagation

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show abstract

“…One of the promising technologies that able to provide capacity improvement is Multiple-Input-Multiple-Output (MIMO) systems. As compared to traditional single-input single-output and single-input multiple-output systems, MIMO systems has higher diversity, ability to mitigate multipath fading and greater throughput without requiring more bandwidth and additional power [1], [2]. To further enhance the overall MIMO system performance with data rates increment, reconfigurable antennas (RAs) could be the solution.…”

Section: Introductionmentioning

confidence: 99%

Indoor Channel Capacity Measurement of 2 x 2 MIMO Polarization Diversity Antenna

Osman¹,

Rahim²,

Hamid³

et al. 2018

IJEECS

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<span>This paper presents the channel capacity investigation and the polarization reconfigurable antenna analysis for MIMO system in an indoor scenario. A single and dual-port polarization reconfigurable antenna is used at the receiver end to study the effect of polarization diversity configurations towards the achievable performance of the channel capacity. The polarization reconfigurable antennas are developed through two techniques, which are slits perturbation for single-port and feeding network modification for dual-port. The benefits offered by the designed antennas are investigated when being used as a receiver in both line-of-sight (LOS) and non-line-of-sight (NLOS) scenarios. The results show the proposed antennas are suitable to be adopted and highly potential to improve the channel capacity of the MIMO systems.</span>

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Reconfigurable monopole array with MEMS switches for MIMO systems

Cited by 2 publications

References 6 publications

Miniaturised MIMO antenna array of two vertical monopoles embedded inside a planar decoupling network for the 2.4 GHz ISM band

Miniaturised MIMO antenna array of two vertical monopoles embedded inside a planar decoupling network for the 2.4 GHz ISM band

Indoor Channel Capacity Measurement of 2 x 2 MIMO Polarization Diversity Antenna

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