High isolation and compact MIMO antenna system with defected shorting wall

Dai, Xi-Wang; Li, Long; Wang, Zhen-Ye; Chen, Liang

doi:10.1017/s1759078714000580

Cited by 7 publications

(6 citation statements)

References 10 publications

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“…Also, as stated before, in the design of a compact MIMO antenna system, it is necessary to use antenna miniaturization techniques that keep the antenna design simple while maintaining the diversity performance as high as possible although the antenna elements are placed close to each other. So far, many miniaturization techniques for MIMO antenna systems have been investigated for ISM band operation, including 2.45-and/or 5-GHz ISM bands [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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Design of a Compact Orthogonal Broadband Printed Mimo Antennas for 5-GHZ Ism Band Operation

Naji¹

2015

PIER B

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Abstract-This paper presents a new design approach for compact orthogonal broadband printed multiple-input multiple-output (MIMO) antennas based on a coplanar waveguide (CPW)-fed hexagonalring monopole antenna (HRMA) element. The design procedure of the basic radiating element is initiated from a stripline (SL)-fed circular monopole antenna (CMA). Then various antennas involved in the design evolution process are introduced to attain a compact CPW-fed HRMA. This basic antenna element has a compact size of 13 × 10 mm 2 , 50% smaller than SL-fed CMA, and a prototype of this antenna is built and tested. Based on HRMA element, compact two-and four-element MIMO antenna systems are designed, fabricated and experimentally demonstrated for 5-GHz ISM band operation. The MIMO antenna systems use orthogonally configured of identical closely spaced HRMA elements, with CPW-fed printed on one side of the substrate to achieve good isolation. Design simulation is carried out with the aid of Computer Simulation Technology Microwave Studio (CST MWS) and confirmed with High Frequency Structure Simulator (HFSS). The experimental results are in close agreement with the simulated ones, which validates the design principle. Based on experimental results, the two MIMO antenna systems have an impedance bandwidth of more than 2 GHz, good isolation of less than 15 dB, and a low envelope correlation coefficient of better than −26 dB across the frequency band of (4-6 GHz), which are suitable for 5-GHz MIMO applications.

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Section: Introductionmentioning

confidence: 99%

“…[20] used a defected shorting wall between two elements of aperture-coupled patch antenna, separated by only 4 mm, to reduce an isolation by 20 dB, and for miniaturizing the system, two H-shaped slot feedings were employed. The envelope correlation coefficient (ECC) less than 0.01 is obtained.…”

Section: Introductionmentioning

confidence: 99%

Design of a Compact Orthogonal Broadband Printed Mimo Antennas for 5-GHZ Ism Band Operation

Naji¹

2015

PIER B

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“…There has been a vast variety of research studies dedicated for isolation improvement. For instance in [13] a compact MIMO antenna is proposed for 2.4 GHz WLAN applications. The high inter-element isolation is obtained by suitable adoption of a defected shorting wall.…”

Section: Introductionmentioning

confidence: 99%

Triple-band operation achievement via multi-input multi-output antenna for wireless communication system applications

Azari-Nasab

Ghobadi

Azarm

et al. 2019

Int. J. Microw. Wireless Technol.

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A multi-input multi-output (MIMO) antenna is designed and discussed for multi-band applications. The constituent antennas are composed of four L-shaped elements and a ground plane. When placed beside each other to form a MIMO antenna, a T-bar shaped parasitic structure is also embedded between the antennas on the backside of the substrate to increase the inter-element isolation. The triple-band performance of the antenna is observed at 2.15–2.73 GHz, 3.1–3.9 GHz, and 5.04–6 GHz. The isolation level of more than 20 is seen over the operating frequency range. The fabricated prototype of the MIMO antenna size is very compact (20 × 40 mm), printed on the FR4 substrate. Based on simulation and experimental results, the proposed design is useful for WiMAX and WLAN applications.

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“…Besides, more requirements in terms of multiband and broad operation are needed. Consequently, several studies have been conducted to design miniaturized multiband antennas which can support multiple communication applications [1][2][3]. Thus, numerous antenna size reduction techniques have been reported elsewhere; for example, introduction of defected microstrip structure (DMS) [4], using a defected ground structure (DGS) [5][6][7] and loading the patch with shorting posts [8].…”

Section: Introductionmentioning

confidence: 99%

Miniaturized Concentric Hexagonal Fractal Rings Based Monopole Antenna for WLAN/WiMAX Application

Djafri¹,

Challal²,

Aksas³

et al. 2019

RADIOENGINEERING

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In this paper a new antenna design technique is introduced in order to achieve tri-band operation as well as antenna miniaturization. The technique consists of using two concentric first-iterative hexagonal rings connected to each other as a radiating patch fed with a Y-shaped microstrip line. The proposed antenna operates at three frequency bands to cover 2.4/5.8 GHz WLAN bands and 3.5/5.5 GHz WiMAX bands applications. The numerical analysis and simulation are carried out with CST MWS. The measured return losses of the proposed antenna show good performance and good agreement with the simulated ones. Consequently the proposed antenna with compact size of 9.7 mm x 17 mm x 1.63 mm is well suited for wireless applications.

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High isolation and compact MIMO antenna system with defected shorting wall

Cited by 7 publications

References 10 publications

Design of a Compact Orthogonal Broadband Printed Mimo Antennas for 5-GHZ Ism Band Operation

Design of a Compact Orthogonal Broadband Printed Mimo Antennas for 5-GHZ Ism Band Operation

Triple-band operation achievement via multi-input multi-output antenna for wireless communication system applications

Miniaturized Concentric Hexagonal Fractal Rings Based Monopole Antenna for WLAN/WiMAX Application

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