Design and analysis of on‐demand reconfigurable WiMAX / WLAN high isolation 2 × 2 MIMO antenna oriented adjacent/orthogonally for imaging applications in UWB‐X band

2021 ◽  
Author(s):  
Manish Sharma ◽  
Rajeev Kumar ◽  
Preet Kaur ◽  
Vigneswaran Dhasarathan ◽  
Truong Khang Nguyen
Keyword(s):  
Mimo Antenna ◽  
High Isolation ◽  
On Demand ◽  
X Band

scholarly journals A Compact Low-Profile High Isolation MIMO Antenna For X-Band Applications

2021 ◽  
Author(s):  
Akanksha Singh ◽  
Arvind Kumar ◽  
Binod Kumar Kanaujia
Keyword(s):  
Mutual Coupling ◽  
Frequency Range ◽  
Entire Frequency Range ◽  
Mimo Antenna ◽  
High Isolation ◽  
Feed Line ◽  
Low Profile ◽  
X Band ◽  
Measurement Results ◽  
Meander Line

Abstract A novel compact low profile MIMO antenna is designed and implemented with high isolation for the X band applications. Proposed MIMO geometry is incorporated with two monopoles which are excited by 50 Ω feed line. To enhance the isolation between inter-elements meander line structures are is identically placed. These meander line structures are reducing the mutual coupling up to 26 dB. In the proposed MIMO antenna two elements cover the entire frequency range between 7.4-11.8 GHz for the X band applications. Meander line structure is working as a decoupling network which improves the isolation considerably. The overall size of the MIMO antenna is 25 × 30 × 1 mm3, and it offers inter-element isolation of >26 dB, envelope correlation coefficient is less than 0.2, and directivity gain >9.99 over the resonating frequency range. The proposed MIMO antenna model is fabricated, and measurement results are verified with simulated results. The antenna shows the satisfactory gain of around 4.8 dB in entire frequency range. The antenna shows the satisfactory gain of around 4.5 dB in entire frequency range.

scholarly journals Ultra-Compact Reconfigurable Band Reject UWB MIMO Antenna with Four Radiators

Electronics ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 584 ◽  
Author(s):  
Muhammad Saeed Khan ◽  
Adnan Iftikhar ◽  
Raed M. Shubair ◽  
Antonio-Daniele Capobianco ◽  
Sajid Mehmood Asif ◽  
...  
Keyword(s):  
Impedance Matching ◽  
Ground Plane ◽  
Handheld Devices ◽  
Pin Diode ◽  
Polarization Diversity ◽  
Mimo Antenna ◽  
High Isolation ◽  
On Demand ◽  
Gain Variation ◽  
First Time

A compact reconfigurable UWB MIMO antenna with four radiators that accomplish on-demand band rejection from 4.9 to 6.3 GHz is presented. An LC stub is connected to the ground plane by activating the PIN diode for each radiator. Two radiators are placed perpendicular to each other to exploit the polarization diversity on a compact 25 × 50 mm 2 FR4 laminate. Two additional radiators are then fixed obliquely on the same laminate (without increasing size) in angular configuration at ±45 ∘ perpendicular to the first two planar radiators still exploiting polarization diversity. The design is validated by prototyping and comparing the results with the simulated ones. On demand band rejection through the use of PIN diodes, wide impedance matching (2–12 GHz), high isolation amongst the radiators, compactness achieved by angular placement of the radiators, low gain variation over the entire bandwidth, band rejection control achieved by adjusting the gap between stub and ground plane, and low TARC values makes the proposed design very suitable for commercial handheld devices (i.e., Huawei E5785 and Netgear 815S housings). The proposed configuration of the UWB MIMO radiators has been investigated first time as per authors’ knowledge.

X-band, 0.25 dB loss, high isolation MESFET switch with good input and output match

1995 ◽  
Vol 31 (19) ◽  
pp. 1699-1700
Author(s):  
F. Ali ◽  
S. Bishop ◽  
D. Krafcsik
Keyword(s):  
High Isolation ◽  
Input And Output ◽  
X Band

scholarly journals A Graphene-Assembled Film Based MIMO Antenna Array with High Isolation for 5G Wireless Communication

2021 ◽  
Vol 11 (5) ◽  
pp. 2382
Author(s):  
Rongguo Song ◽  
Xiaoxiao Chen ◽  
Shaoqiu Jiang ◽  
Zelong Hu ◽  
Tianye Liu ◽  
...  
Keyword(s):  
Antenna Array ◽  
Antenna Arrays ◽  
Multiple Input Multiple Output ◽  
Frequency Selective Surface ◽  
Antenna System ◽  
Antenna Element ◽  
Mimo Antenna ◽  
High Isolation ◽  
Input Multiple Output ◽  
Alternative Material

With the development of 5G, Internet of Things, and smart home technologies, miniaturized and compact multi-antenna systems and multiple-input multiple-output (MIMO) antenna arrays have attracted increasing attention. Reducing the coupling between antenna elements is essential to improving the performance of such MIMO antenna system. In this work, we proposed a graphene-assembled, as an alternative material rather than metal, film-based MIMO antenna array with high isolation for 5G application. The isolation of the antenna element is improved by a graphene assembly film (GAF) frequency selective surface and isolation strip. It is shown that the GAF antenna element operated at 3.5 GHz has the realized gain of 2.87 dBi. The addition of the decoupling structure improves the isolation of the MIMO antenna array to more than 10 dB and corrects the antenna radiation pattern and operating frequency. The isolation between antenna elements with an interval of 0.4λ is above 25 dB. All experimental results show that the GAF antenna and decoupling structure are efficient devices for 5G mobile communication.

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