Compact modified circular patch quad-band MIMO antenna with high isolation and low correlation

The present paper introduces a design methodology to extend the operation of a microstrip patch antenna to operate efficiently at multiple higher-order resonances. This method depends on the geometrical modification of the antenna structure by adding well-designed inductively-loaded and capacitively-coupled elements to the primary patch so that it can efficiently radiate at the desired higher frequency bands. It is explained quantitatively how to use the geometrical parameters of the inductively and capacitively coupled elements for accurate tuning of the multiple resonant frequencies of the antenna. The proposed method is applied to modify a primary hexagonal patch antenna (designed to principally radiate at 28 GHz as its first-order resonance) so as to operate at additional higher frequency bands around 43, 52, and 57 GHz. Also, an alternative design is provided for a quad-band printed antenna of composite patch structure that operates in the same millimetric-wave (mm-wave) bands, 28, 43, 52, and 57 GHz with high radiation efficiency, excellent impedance matching, and satisfactory values of the antenna gain. The corresponding frequency bands are, respectively, (27.7-28.3 GHz), (42.7-43.3 GHz), (51.2-53.0 GHz), and (55.7-57.5 GHz). The dimensions of the area occupied by the primary patch and the parasitic elements are 5.2 × 3.3 mm . The two antennas are fabricated for experimental assessment of their performance including the impedance matching and radiation patterns. It is shown that the experimental measurements come in agreement with the simulation results over all the four operational mm-wave frequency bands. One of the advantages of the proposed method is that it can be applied to patch antennas of arbitrary shapes and is not restricted to hexagonal patch antennas. Furthermore, this method is not restricted by extending the operation of the antenna to radiate at four frequency bands. It is capable of adding any desired number of frequency bands so that the antenna can operate at five or, even, more bands.INDEX TERMS MIMO, multi-band antenna, Patch antenna, 5G mobile communications

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Section: Introductionmentioning

confidence: 99%

Design Methodology of Multiband Printed Antennas for Future Generations of Mobile Handsets

2022

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“…This recommends that a mobile handset antenna should be able to operate in the range of mm-wave of the electromagnetic spectrum to support the required data rates for the future applications. Moreover, due to size limitations, it is recommended that a mobile handset antenna is able to operate efficiently at multiple frequency bands in the mmwave spectrum to support the applications of the forthcoming mobile generations [4,5]. In the various situations, the antenna structure may be complicated as those having three-dimensional shape to operate efficiently in a single frequency band and to perform some function in special applications [6,7] and may include layers with high electromagnetic absorbance [8] to produce radiation patterns of desired shape.…”

Section: Introductionmentioning

confidence: 99%

Millimetric-Wave Quad-Band Mimo Antennas for Future Generations of Mobile Communications

Abo-Elhassan¹,

Farahat²,

Hussein³

2022

PIER B

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Two types of quad-band millimetric-wave four-port MIMO antenna systems are proposed for the forthcoming generations of mobile handsets. A novel printed antenna is introduced to be the single-element of the MIMO antenna system. It is shown that the proposed MIMO antennas are capable to produce both spatial and polarization diversities that enhance the performance of mobile communications. A co-polarized four-port MIMO antenna is proposed to provide spatial diversity whereas another cross-polarized four-port MIMO antenna is proposed to produce both spatial and polarization diversities. It is shown that the two types of MIMO antennas can operate efficiently over the four frequency bands centered at 28, 43, 52, and 57 GHz. Prototypes are fabricated for the proposed MIMO antennas for the sake of experimental evaluation. Both the experimental and simulated results show that the achieved bandwidths, at the four operational frequency bands, are 0.6, 0.6, 1.8, and 1.5 GHz, respectively. Also, the radiation efficiencies calculated at the four operational frequencies are 86.5%, 87.5%, 89.2%, and 90.0%, respectively. The dimensions and the results concerning the performance of the proposed MIMO antennas are compared to those of other designs for MIMO antennas available in some recently published work.

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“…Moreover, due to size limitations, it is recommended that a mobile handset antenna is able to operate efficiently at multiple frequency bands in the millimetric-wave spectrum to support the applications of the forthcoming mobile generations. 4,5 Recently, considerable research work has provided various designs of printed millimeter-wave antennas. The work of Khattak et al 6 introduces a dual-band millimetric-wave circular microstrip patch antenna with an elliptical slot.…”

Section: Introductionmentioning

confidence: 99%

Multiband millimeter‐wave patch antenna with parasitic element

El-Hassan

Farahat

Hussein

2022

Micro & Optical Tech Letters

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The present paper introduces a novel design of a triple-band millimeter-wave printed antenna. The proposed antenna radiates at 28 and 43 GHz as its firstorder and second-order resonances, respectively. Also, the antenna is designed to radiate efficiently in a third higher frequency band of about 2 GHz bandwidth (from 46 to 48 GHz). The design method depends on a compositepatch structure where the primary radiating element is a circular patch of modified geometry to radiate at 28 and 43 GHz. An arc-shaped parasitic printed element is capacitively-coupled to the primary patch so that it can efficiently radiate over the wideband (46)(47)(48). The primary patch is fed through a microstrip line with an inset feed for impedance matching over the desired frequency bands. The antenna structure and the feeding line are printed on a thin dielectric substrate of low loss to be suitable for millimeterwave operation. The antenna has high radiation efficiency, excellent impedance matching, and satisfactory values of the antenna gain over the operational frequency bands. A prototype is fabricated and subjected to

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Compact modified circular patch quad-band MIMO antenna with high isolation and low correlation

Cited by 7 publications

References 11 publications

Design Methodology of Multiband Printed Antennas for Future Generations of Mobile Handsets

Design Methodology of Multiband Printed Antennas for Future Generations of Mobile Handsets

Millimetric-Wave Quad-Band Mimo Antennas for Future Generations of Mobile Communications

Multiband millimeter‐wave patch antenna with parasitic element

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