Reduction of Mutual Coupling Between Patch Antennas Using a Polarization-Conversion Isolator

Cheng, You‐Feng; Ding, Xiao; Shao, Wei; Wang, Bing‐Zhong

doi:10.1109/lawp.2016.2631621

Cited by 122 publications

(74 citation statements)

References 18 publications

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“…Two simple quasi‐square slots were employed to improve the isolation between 2 patch antennas by a maximum of 22 dB at 10 GHz . A 19.6 dB mutual coupling reduction using a parasitic isolator between two‐elements patch antenna array has been presented in Reference . Qamar et al used CSRR printed on a superstrate slab placed above microstrip phased array.…”

Section: Introductionmentioning

confidence: 99%

Highly reduced mutual coupling between wideband patch antenna array using multiresonance EBG structure and defective ground surface

Sokunbi

Attia

2019

Micro & Optical Tech Letters

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This paper presents a novel slotted wideband microstrip patch antenna array with 2 decoupling structures that enabled isolation enhancement between 10 and 40 dB throughout the operating bandwidth of 4‐6.5 GHz. Four asymmetrical patches were first used as a unit cell to produce a multiresonance electromagnetic band gap (EBG) structure capable of increasing the isolation between the patch array by about 50 dB within the impedance bandwidth of 5.8‐6.4 GHz. By introducing 3 double F‐shaped etchings in the array ground plane, the isolation bandwidth is extended to 4.0‐6.5 GHz (ie, 48%) with measured isolation improvement of 10‐40 dB over the entire isolation bandwidth. The multiresonance EBG structure mitigates the surface waves propagating in the substrate while the double F‐shaped ground plane reduces the surface waves traveling on the ground plane. The edge‐to‐edge spacing between the 2 patch antennas is 25.2 mm which is equivalent to 0.42 λ0 (λ0 is the free‐space wavelength at the center frequency of 5.0 GHz). After loading the decoupling structures in the antenna array, the gain increased from 5.6 dB to 7 dB. The proposed antenna is fabricated and there is an acceptable agreement between the simulated and measured results. The antenna radiation characteristics are observed to be fairly consistent over the large operating bandwidth of 4‐6.5 GHz. The proposed antenna is a potential candidate for wideband wireless applications in the sub‐6 GHz band.

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Section: Introductionmentioning

confidence: 99%

Highly reduced mutual coupling between wideband patch antenna array using multiresonance EBG structure and defective ground surface

Sokunbi

Attia

2019

Micro & Optical Tech Letters

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“…This helps the antenna to adopt multiple signals efficiently. Therefore, mutual coupling cannot be ignored . It should be taken into account for the design of MIMO antenna with high performance.…”

Section: Introductionmentioning

confidence: 99%

Complementary meander‐line‐inspired dielectric resonator multiple‐input‐multiple‐output antenna for dual‐band applications

Biswas

Chakraborty

2019

Int J RF Microw Comput Aided Eng

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The communication presents a simple dielectric resonator (DR) multiple‐input‐multiple‐output (MIMO) dual‐band antenna. It utilizes two “I”‐shaped DR elements to construct an “I”‐shaped DR array antenna (IDRAA) for MIMO applications. The ground plane of the antenna is defected by two spiral complementary meander lines and two circular ground slots. In the configuration, two “I”‐shaped DR elements are placed with a separation of 0.098λ. The antenna covers dual‐band frequency spectra from 3.46 to 5.37 GHz (43.26%) and from 5.89 to 6.49 GHz (9.7%). It ensures the C‐band downlink (3.7‐4.2 GHz), uplink (5.925‐6.425 GHz), and WiMAX (5.15‐5.35 GHz) frequency bands. Each DR element is excited with a 50‐Ω microstrip line feed with aperture‐coupling mechanism. The antenna offers very high port isolation of around 18.5 and 20 dB in the lower band and upper band, respectively. The proposed structure is suitable to operate in the MIMO system because of its very nominal envelope correlation coefficient (<0.015) and high diversity gain (>9.8). The MIMO antenna provides very good mean effective gain value (±0.35 dB) and low channel capacity loss (<0.35 bit/s/Hz) throughout the entire operating bands. Simulated and measured results are in good agreement and they approve the suitability of the proposed IDRAA for C‐band uplink and downlink applications and WiMAX band applications.

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“…The coupling between the antenna elements is occurred by the effect of surface wave and near fields that directly influenced the array performances. Therefore, mutual coupling cannot be ignored in different MIMO antenna applications …”

Section: Introductionmentioning

confidence: 99%

Reduced mutual coupling of compact MIMO antenna designed for WLAN and WiMAX applications

Biswas

Chakraborty

2018

Int J RF Microw Comput Aided Eng

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This communication describes a simple compact wide band multiple input multiple output (MIMO) antenna for Wireless Local Area Network (WLAN) and Worldwide Interoperability for Microwave Access (WiMAX) applications. The proposed antenna is integrated with an electromagnetic band gap (EBG) structure which is used to reduce the mutual coupling between the ports. The structure is excited by a line feed mechanism and investigated experimentally. The antenna covers the frequency range from 2.01 to 3.92 GHz with the corresponding fractional bandwidth of 64.42%. It fulfills the bandwidth requirements of WLAN (2.35‐2.5 GHz) and WiMAX (3.2‐3.85 GHz) bands where minimum port isolation is obtained around 29 dB throughout the entire application band. The proposed MIMO antenna has very low envelope correlation co‐efficient (ECC < 0.01) and high diversity gain (DG > 9.8). It also has very low channel capacity loss (CCL) which is found to be less than 0.2 Bit/s/Hz. The simulation results are compared with the measurement outcomes and found a good agreement between them.

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Reduction of Mutual Coupling Between Patch Antennas Using a Polarization-Conversion Isolator

Cited by 122 publications

References 18 publications

Highly reduced mutual coupling between wideband patch antenna array using multiresonance EBG structure and defective ground surface

Highly reduced mutual coupling between wideband patch antenna array using multiresonance EBG structure and defective ground surface

Complementary meander‐line‐inspired dielectric resonator multiple‐input‐multiple‐output antenna for dual‐band applications

Reduced mutual coupling of compact MIMO antenna designed for WLAN and WiMAX applications

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