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Author

Asutosh Mohanty

Bio: Asutosh Mohanty is an academic researcher from KIIT University. The author has contributed to research in topics: Antenna (radio) & Port (circuit theory). The author has an hindex of 5, co-authored 14 publications receiving 54 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, a 2-port UWB MIMO diversity antenna is designed to operate from 2.7 to 10.5 GHz with −10dB impedance bandwidth of 118.18%.
Abstract: In this research work, a 2-port UWB MIMO diversity antenna is designed to operate from 2.7 to 10.5 GHz with −10 dB impedance bandwidth of 118.18%. The proposed design has a total size of 0.57 λ 2.7 × 0.28 λ 2.7 ( λ 2.7 is lowest operating wave-length) consists of bi-planar printed fractal radiators whose feeds are contorted in geometry and are diametrically-fed. Characteristics mode analysis (CMA) is introduced to investigate antenna design, feeding technique and modal current distributions. The analysis includes study of modal dynamics, resonance mechanism, bandwidth potentials and modal radiation quality factor. The port-isolation is ⩾ −15 dB when ground plane is truncated by rectangular slots via ellipsoid slot. With an end-connected ground thin neutralization lines, mutual coupling is further reduced by 7.5 dB ( > −22.5 dB, measured). The diversity performance metrics are evaluated from ECC, CCL, DG, multiplexing efficiency, MEG and TARC. ECC is low 0.17 (from far-field magnitudes) and mean effective gain for both ports are | MEG | 3 dB with MEG 1 MEG 2 ≊ 1, which is serviceable for UWB multi-standard mobile/wireless/sensor ad-hoc diversity systems. An equivalent circuit model is also designed and the prototype of antenna is fabricated and measured to validate its performance.

24 citations

Journal ArticleDOI
TL;DR: In this article, the authors introduced characteristics mode analysis (CMA) to study the dual-polarization behavior of simple monopole antenna, which consists of monopole feed with symmetric arms (SA), resonating at 2.45 GHz and right-handed stub (RHS) connected to resonate at 5.8 GHz.
Abstract: In this paper, Characteristics mode analysis (CMA) is introduced to study the dual-polarization behavior of simple monopole antenna. The antenna consists of monopole feed with symmetric arms (SA), resonating at 2.45 GHz and right-handed stub (RHS) is connected to resonate at 5.8 GHz. The SA has linear polarization and RHS has circular polarization. CMA is introduced to explore dual-polarized properties and validated on modal metrics. The intuition of antenna design is further extended to 4-port MIMO antenna configuration. Due to rotationally symmetrical connected ground topology, another induced resonance at 1.54 GHz is observed. A L-shaped stub is further connected to one-end of the monopole arm of each antenna element, that function as 2.5 GHz resonator and an effective isolator. The overall antenna dimension is 0.3 λ × 0.3 λ × 0.018 λ (where λ is the lowest operating wavelength) and the elements are spatially separated with edge-to-edge spacing of 0.018 λ with port isolations > 15 dB. The MIMO antenna operates at 1.54 GHz, 2.5 GHz with linear polarization and at 5.63 GHz as circular polarization. The antenna gains with radiation efficiencies are 0.62 dBi ( > 60%), 4 dBi ( > 70%) and 4.25–6 dBc ( > 80%). The computed ECCfar−fields is 0.3, showing its potential for pattern and polarization diversity MIMO environments. A prototype antenna is fabricated and measured with good agreements and found compatible for L-band, lower WLAN and upper WLAN applications.

22 citations

Journal ArticleDOI
TL;DR: In this article, a wideband hybrid fractal monopole antenna loaded with artifical magnetic conductor (AMC) is proposed, which achieves self-similarity compactness, reduced size and good wideband performances.
Abstract: A wideband hybrid fractal monopole antenna loaded with artifical magnetic conductor (AMC) is proposed. Using a hybrid fractal generator, the monopole antenna achieves self-similarity compactness, reduced size and good wideband performances. The ground is semi-elliptic and has defected steps aiming to improve impedance matching and X-pol. reduction. The AMC reflector has 3 × 3 array of cesaro shaped unit cells looped in a square metallic conductor. The AMC enhances radiation gain with back-lobe reduction. The AMC unit cell produce a 0 0 phase reflection at f AMC = 4.5 GHz and then loaded to optimize antenna performance. To validate the design, a prototype antenna is fabricated and measured. The antenna operates from (3.7–7.0) GHz with 61.68% impedance bandwidth, realized gain of (8.7–13.8) dBi, and radiation efficiency > 82.5%. The proposed antenna leverages on compactness, low-profile AMC height and good boresight radiation gain, which shows its potential for hybrid wireless cellular networks.

17 citations

Journal ArticleDOI
TL;DR: In this article, an UWB fractal MIMO antenna with the Theory of Characteristic Mode Analysis (TCM) was investigated with the theory of Othogonally displaced antenna elements.
Abstract: An UWB fractal MIMO antenna is investigated with the Theory of Characteristic Mode Analysis (TCM) in this article. The proposed design has othogonally displaced antenna elements. The 4 -segmentation feeding technique are provided for resonant mode tuning with a spasmodic current distribution and its asymmetry behaves like impedance transformer. The proposed antenna has a dimension of 0.51 λ 2.4 G H z × 0.25 λ 2.4 G H z , ( λ 2.4 is the lowest operating wavelength) and impedance bandwidth of 123.80% ranging from (2.4–10.2) GHz. The connected grounds are recessed on its confluence aiming at enhancing bandwidth and good port isolation > −17 dB, (inhibiting supplementary decoupling profiles). An 1-element and 2-element antenna design are analyzed through different CMA parameters and fabricated for validation. The study reveals some important CMA metrics like significant radiation modes, bandwidth potential, sensitivity, Q-factor and pattern diversity. The proposed MIMO antenna system can be used in UWB ad-hoc sensing, wearable devices, open source indoor localization, positioning and tracking applications.

14 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, a four-port multiple-input-multiple-output (MIMO) super wideband antenna with mitigation of interfering bands is reported, which comprises four identical patches which are placed orthogonal to each other.
Abstract: In this manuscript, four-port multiple-input-multiple-output (MIMO) superwideband antenna with mitigation of interfering bands is reported. The presented antenna comprises four identical patches which are placed orthogonal to each other. Rectangular ground plane to placed below the radiating patch forming monopole configuration and reduces the overall size of the antenna. Size reduction of antenna also has no change in wide operating bandwidth of the proposed antenna and interfering bands. Interfering bands which include WiMAX, LTE43 and WLAN are suppressed by using T-C shaped stubs/slots on the radiating patch and it is also worth noting that no separate isolation technique is used to achieve isolation between the radiating elements. Also, the inter-radiating patch maintains isolation of more than 20 dB with ECC (Envelope Correlation Coefficient) being less than 0.02 and TARC (Total Active Reflection Coefficient) less than 20 dB in operating bands. Single element, 2 × 2 MIMO, and 4 × 4 MIMO antenna is fabricated and confirms good agreement with simulated results.

26 citations

Journal ArticleDOI
TL;DR: In this article, a 2-port UWB MIMO diversity antenna is designed to operate from 2.7 to 10.5 GHz with −10dB impedance bandwidth of 118.18%.
Abstract: In this research work, a 2-port UWB MIMO diversity antenna is designed to operate from 2.7 to 10.5 GHz with −10 dB impedance bandwidth of 118.18%. The proposed design has a total size of 0.57 λ 2.7 × 0.28 λ 2.7 ( λ 2.7 is lowest operating wave-length) consists of bi-planar printed fractal radiators whose feeds are contorted in geometry and are diametrically-fed. Characteristics mode analysis (CMA) is introduced to investigate antenna design, feeding technique and modal current distributions. The analysis includes study of modal dynamics, resonance mechanism, bandwidth potentials and modal radiation quality factor. The port-isolation is ⩾ −15 dB when ground plane is truncated by rectangular slots via ellipsoid slot. With an end-connected ground thin neutralization lines, mutual coupling is further reduced by 7.5 dB ( > −22.5 dB, measured). The diversity performance metrics are evaluated from ECC, CCL, DG, multiplexing efficiency, MEG and TARC. ECC is low 0.17 (from far-field magnitudes) and mean effective gain for both ports are | MEG | 3 dB with MEG 1 MEG 2 ≊ 1, which is serviceable for UWB multi-standard mobile/wireless/sensor ad-hoc diversity systems. An equivalent circuit model is also designed and the prototype of antenna is fabricated and measured to validate its performance.

24 citations

Journal ArticleDOI
TL;DR: In this article, a high gain and wideband multiple-input multiple-output (MIMO) for 5G new radio (NR) networks is introduced, where an artificial magnetic conductor (AMC) is located underneath the MIMO antenna to improve the gain by about 55% over the entire achieved frequency band (26-31.5 GHz).
Abstract: A high gain and wideband multiple-input multiple-output (MIMO) for 5G new radio (NR) networks is introduced in this paper. The single unit is a monopole antenna with partial ground plane and two small triangles are cut out from the patch to produce the proposed frequency band. The two elements are located orthogonal to each other in order to reduce the mutual coupling without using isolation structure at the desired frequency 28 GHz. An artificial magnetic conductor (AMC) is located underneath the MIMO antenna to improve the gain by about 55% over the entire achieved frequency band (26-31.5 GHz). The Suggested antenna model with the AMC structure is fabricated to verify the simulation results in terms of S-parameters, radiation patterns, gain, and diversity parameters. It is worth noting that the experimental results have the same trend of the simulation ones which makes the suggested AMC-based MIMO antenna applicable for 5G NR networks.

23 citations

Journal ArticleDOI
TL;DR: In this article, the authors introduced characteristics mode analysis (CMA) to study the dual-polarization behavior of simple monopole antenna, which consists of monopole feed with symmetric arms (SA), resonating at 2.45 GHz and right-handed stub (RHS) connected to resonate at 5.8 GHz.
Abstract: In this paper, Characteristics mode analysis (CMA) is introduced to study the dual-polarization behavior of simple monopole antenna. The antenna consists of monopole feed with symmetric arms (SA), resonating at 2.45 GHz and right-handed stub (RHS) is connected to resonate at 5.8 GHz. The SA has linear polarization and RHS has circular polarization. CMA is introduced to explore dual-polarized properties and validated on modal metrics. The intuition of antenna design is further extended to 4-port MIMO antenna configuration. Due to rotationally symmetrical connected ground topology, another induced resonance at 1.54 GHz is observed. A L-shaped stub is further connected to one-end of the monopole arm of each antenna element, that function as 2.5 GHz resonator and an effective isolator. The overall antenna dimension is 0.3 λ × 0.3 λ × 0.018 λ (where λ is the lowest operating wavelength) and the elements are spatially separated with edge-to-edge spacing of 0.018 λ with port isolations > 15 dB. The MIMO antenna operates at 1.54 GHz, 2.5 GHz with linear polarization and at 5.63 GHz as circular polarization. The antenna gains with radiation efficiencies are 0.62 dBi ( > 60%), 4 dBi ( > 70%) and 4.25–6 dBc ( > 80%). The computed ECCfar−fields is 0.3, showing its potential for pattern and polarization diversity MIMO environments. A prototype antenna is fabricated and measured with good agreements and found compatible for L-band, lower WLAN and upper WLAN applications.

22 citations