Compact Dual-Band Decoupling Structure for Improving Mutual Coupling of Closely Placed PIFAs

Xun, Jian‐Hui; Shi, Ling‐Feng; Liu, Weirong; Chen, Sen

doi:10.1109/lawp.2017.2691716

Cited by 41 publications

(22 citation statements)

References 12 publications

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“…Increasing the isolation between closely placed antennas has always been a challenge for researchers [20][21][22][23][24][25][26][27][28][29][30]. In this study, for improving the port isolation of the proposed DPA, a wideband decoupling structure is proposed.…”

Section: Isolation Improvement and Discussionmentioning

confidence: 99%

Broadband dual‐polarised antenna with wideband decoupling structure for polarisation diversity wireless communication application

Xun

Shi

Liu

et al. 2019

IET Microwaves, Antennas & Propagation

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A broadband dual‐polarised antenna with wideband decoupling structure is presented. By using the improved dipole, the proposed antenna achieves a common impedance bandwidth of 62% ranging from 1.645 to 3.13 GHz with standing a wave ratio <1.5. For improving the port isolations of the prototype, wideband isolation enhance technique is proposed. By using this technique, an average port isolation enhancement of 6 dB is realised within a wider bandwidth than 1 GHz. The bandwidth extension and decoupling mechanism are discussed. Moreover, the radiation patterns, gain and total radiation efficiency of the proposed antenna are also studied and presented. Experimental results demonstrate that the antenna has many advantages such as high gain (8.5 ± 0.7dBi), good radiation efficiency (>90.9%) and high cross polarisation discrimination. It is very suitable for polarisation diversity wireless communication application.

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Section: Isolation Improvement and Discussionmentioning

confidence: 99%

Broadband dual‐polarised antenna with wideband decoupling structure for polarisation diversity wireless communication application

Xun

Shi

Liu

et al. 2019

IET Microwaves, Antennas & Propagation

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“…In addition to this, requirement of the compact size of multi‐band MIMO antenna design puts constraints on the size of decoupling circuit. In a dual‐band MIMO antenna design, decoupling circuit needs to be such that it provides high isolation in both the operating bands . Different types of decoupling circuits have been reported in the literature .…”

Section: Introductionmentioning

confidence: 99%

“…3 However, accommodating more bands in the same antenna makes the antenna design challenging task. 4,5 Recently, several MIMO antenna designs have been reported in the literature for dual-band WLAN applications [6][7][8][9][10][11][12][13][14][15][16][17][18][19] and some have been reported for dual-band WiMAX applications. 17,[20][21][22][23][24] In these reported papers, some of the designs have nonplanar structure 15,17,18,24 and are not suitable for compact planar portable devices.…”

Section: Introductionmentioning

confidence: 99%

“…In a dual-band MIMO antenna design, decoupling circuit needs to be such that it provides high isolation in both the operating bands. 9 Different types of decoupling circuits have been reported in the literature. 8,23,[25][26][27][28][29][30] In References 26, 27, it has been reported that a frequency reconfigurable MIMO antenna requires a frequency reconfigurable decoupling circuit.…”

Section: Introductionmentioning

confidence: 99%

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Compact planar frequency reconfigurable multiple‐input‐multiple‐output antenna with pattern and polarization diversity characteristics for WiFi and WiMAX standards

Sipal

Abegaonkar

Koul

2020

Int J RF Microw Comput Aided Eng

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A compact planar frequency reconfigurable dual‐band multiple‐input‐multiple‐output (MIMO) antenna with high isolation and pattern/polarization diversity characteristics is presented in this article for WiFi and WiMAX standards. The MIMO configuration incorporates two symmetrically placed identical antenna elements and covers overall size of 24 mm × 24 mm × 0.762 mm. Reconfiguration of each antenna element is achieved by using a PIN diode which allows antennas to switch from state‐1 (2.3‐2.4 GHz and 4.6‐5.5 GHz) to state‐2 (3.3‐3.5 GHz and 4.6‐5.5 GHz). In state‐1, the configuration offers isolation ≥18 dB and 20 dB in lower band (LB) and upper band (UB) respectively; whereas, in state‐2, isolation ≥21 dB and 20 dB in LB and UB respectively is achieved. The same decoupling circuit provides high isolation in dual‐band of two states, which makes overall size of the proposed design further compact. The antennas are characterized in terms of envelope correlation coefficient, radiation pattern, gain, and efficiency. From measured and simulated results, it is verified that the proposed frequency reconfigurable dual‐band multi‐standard MIMO antenna design shows desirable performance in both operating bands of each state and compact size of the design makes it suitable for small form factor devices used in future wireless communication systems.

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“…However, it is limited only to WLAN application. In [11], planar spiral line structure served as a wave trap, which enhances the isolation by blocking the near-field radiation and results in the complex decoupling structure. A mushroom-type EBG structure [12] is designed to prevent the surface current without reshaping its radiation pattern characteristics and input impedance.…”

Section: Introductionmentioning

confidence: 99%

Performance enhancement and signal integrity analysis of multiband MIMO antenna for handheld electronic devices

Subbaraj

Sambandam

Kanagasabai

et al. 2019

IET Microwaves, Antennas & Propagation

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In this study, a multiband 8‐element MIMO antenna operating at LTE 800/2300/2500 MHz, GSM 850/900/1900 MHz, UMTS, DCS, PCS, IMT, WLAN 2400 MHz, WiMAX 3500 MHz and Wi‐Fi 5800 MHz is proposed for handheld devices. The proposed antenna comprises of radiating elements and novel decoupling structure to reduce the mutual coupling. To obtain multiple resonances, F‐shaped monopole, C‐shaped strips, L and S‐shaped monopoles are integrated to form the complete radiator. The protruded ground plane with inverted π‐shaped slot acts as the decoupling element. The eight elements are arranged in a certain fashion to achieve spatial and polarisation diversity. The impedance bandwidth achieved is 170, 1070, 400 and 700 MHz. The isolation is >20 dB in all the desired operating bands. The simulated peak gain and efficiency of the antenna at the four operating bands are 4.8/6.3/5.4/4.7 dBi and 75/90/80/83%, respectively. Furthermore, the envelope correlation coefficient, the apparent diversity gain and effective diversity gain are calculated and presented. The obtained measured and simulated results are in good correlation with each other.

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Compact Dual-Band Decoupling Structure for Improving Mutual Coupling of Closely Placed PIFAs

Cited by 41 publications

References 12 publications

Broadband dual‐polarised antenna with wideband decoupling structure for polarisation diversity wireless communication application

Broadband dual‐polarised antenna with wideband decoupling structure for polarisation diversity wireless communication application

Compact planar frequency reconfigurable multiple‐input‐multiple‐output antenna with pattern and polarization diversity characteristics for WiFi and WiMAX standards

Performance enhancement and signal integrity analysis of multiband MIMO antenna for handheld electronic devices

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