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Isolation and Gain Improvement of a Rectangular Notch UWB-MIMO Antenna
Anees Abbas1, Niamat Hussain1, Md Abu Sufian1
1Department of Information and Communication Engineering, Chungbuk National University, Cheongju 28644, Korea.
Sensors (Basel, Switzerland)
|February 26, 2022
Summary
This study enhances a UWB-MIMO antenna using a parasitic isolator and novel decoupler. The improved antenna achieves better isolation and gain for wireless applications.
Area of Science:
- Electrical Engineering
- Electromagnetics
- Antenna Theory
Background:
- Modern wireless systems require compact, high-performance antennas.
- Ultra-Wideband (UWB) and Multiple-Input Multiple-Output (MIMO) antennas offer high data rates but face challenges in isolation and gain.
Purpose of the Study:
- To improve the performance of a co-planar waveguide rectangularly notched UWB-MIMO antenna.
- Enhance antenna isolation and gain through parasitic elements.
- Achieve superior decoupling for MIMO antenna systems.
Main Methods:
- Designed a UWB-MIMO antenna with a rectangular notch using electromagnetic bandgap structures.
- Integrated a parasitic isolator and a novel parasitic decoupler to enhance isolation.
- Utilized microstrip patch antennas and shorting pins for antenna construction.
- Truncated radiating patch ends with a semicircle for UWB characteristics.
Main Results:
- Achieved a rectangular notch band (5.25-5.85 GHz) within the 3-12.8 GHz operating band.
- Demonstrated significantly reduced mutual coupling (<-21 dB).
- Obtained a low envelope correlation coefficient (<0.001).
- Confirmed stable gain and planar structure (60 × 60 × 1.52 mm³).
Conclusions:
- The proposed parasitic isolator and decoupler effectively enhance UWB-MIMO antenna performance.
- The design offers a viable solution for high-performance, compact antenna systems.
- The antenna meets requirements for reduced mutual coupling and stable gain.
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