SLOTTED MICROSTRIP MIMO ANTENNA FOR 5G MOBILE APPLICATIONS
A dual-band two-port Multiple-Input Multiple-Output (MIMO) antenna at 28/38 GHz bands for the approaching 5G wireless applications is configured and manufactured in this paper. The MIMO antenna takes rectangular slotted patches with inverted I-shaped slots at the lower border of the mobile substrate. The antenna works in a 27.58–28.649 GHz bandwidth at 28 GHz and 1.4306 (37.213-38.643) GHz 38 GHz. A defected ground construction (DGS) to raise the isolation among the two ports and magnify the antenna radiation is introduced. The MIMO antenna is planned and optimized through an HFSS simulator as well as by measurement. The results from simulation and measurement are in good agreement in the meaning of reflection coefficients and mutual coupling of the introduced MIMO antenna.
Unprecedented progression in channel capacity, data rates, latency, efficiency, and preserving energy is introduced by 5G mobile associations with massive MIMO implementation techniques to serve the rising demand for wireless services contrasted with SISO systems without the necessity of expanding the bandwidth of transmitted power. These systems inquiry augmented functionality, economized size, superior performance, simple to be combined with other circuit components, and most importantly lower development cost. Exceptional isolation and low envelope correlation coefficient ECC (uncorrelated) among antenna elements are highly imperative to offer confident wireless channels. Patch antennas are susceptible to working in multi-bands. This is performed by loading slots, slits, or shortening pins in the patch. When the slots are implanted at the maximum magnetic field location, the maximum effect of loading is gained. The MIMO antenna introduced in our work is varied from other usual antennas to coincide with the obligations of the prevalent 5G wireless communication system.
- Printed slotted antenna
- Microstrip patch antenna capable of working in up to 1 to 2 bands only
- Coupling reduction of MIMO antenna
- Need of Complex Bias Networks to reach dual-band utilization for dual-band allocation
- Not capable of working in mm-wave applications.
- Less reception due to high return loss.
- Slots etched are equivalent to a number of bands.
In our work, we originate a principle of a compacted slotted microstrip MIMO antenna at 28/38 GHz which is appropriate for the coming 5G wireless communication. For super utilization of practicable handset space, a rectangular shape of two elements slotted microstrip antenna is presumed. A rectangular microstrip patch with an inverted I-shaped slot is at the topmost region of the patch will be placed with inset feed. The patches are fed by a microstrip transmission line to induce the acceptable series to realize input impedance with multiple quarter wavelength transformers. A rectangular slot is implanted in the partial rectangular ground plane. The principal basis for system design is the mutual coupling which is primarily minimized by expanding the interval among the antenna elements. The distance between the two patch edges to prevent mutual coupling and grating lobes at 28 GHz.
- There are many advantages of this tri-band MIMO antenna such as the small volume, lightweight and easy integration, low cost, easy fabrication.
It has good application value in modern wireless communication systems.
A rectangular microstrip patch with an inverted I-shaped slot is at the topmost region of the patch will be placed with inset feed. The patches are fed by a microstrip transmission line to induce the acceptable series to realize input impedance with multiple quarter wavelength transformers. A rectangular slot is implanted in the partial rectangular ground plane. The principal basis for system design is the mutual coupling which is primarily minimized by expanding the interval among the antenna elements. The distance between the two patch edges to prevent mutual coupling and grating lobes at 28 GHz.
- ANSYS HFSS v14
A novel integrated two slotted patch MIMO antenna operated at 28 GHz and 38 GHz with DGS was introduced complying with the upcoming 5G mobile communication systems. The compact mm-wave two-element MIMO antenna covered a wide frequency band of 1.0683 (27.58 – 28.649) GHz at 28 GHz and 1.4306 (37.213– 38.643) GHz at 38 GHz with a gain of 7.88 dB and 9.49 dB respectively. Expected results such as S-parameters, antenna gain, and radiation efficiency were calculated and measured, and they can coincide with the obligations of 5G systems. The mutual coupling among the two antenna element ports is superior to -27 dB.
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