| Manuscript Title: | Novel Six way Power Divider using SIW for Array Antenna Applications |
| Manuscript Id: | IJMOT-2023-9-352603 |
| Abstract: | This manuscript introduces an innovative six-way power divider design using substrate integrated waveguide technology, specifically tailored for applications in both X-band and C-band frequencies. The utilization of SIW technology in this design offers significant advantages, including exceptional isolation between output ports, and a high level of return loss. Additionally, the design incorporates a coaxial port at its center, facilitating the analysis of the power divider's performance. This coaxial port can also serve as a feeding structure for an antenna array, adding to its versatility. The simulation results indicate that the input return loss for port 1 of the power divider exceeds 23dB, demonstrating excellent performance. Furthermore, the design has been successfully fabricated, and the measured results align with the expected performance standards, affirming its practicality and functionality. |
| Authors: | Reema Budhiraja, Jasmine Saini, Nidhi Tiwari, Shweta Srivastava |
| Submitted On: | 19-09-2023 |
| Pages: | 1-6 |
| Action: | [Full Paper]
No. of Downloads: 68 |
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| Manuscript Title: | Enhanced Axial Ratio Bandwidth and Circular Polarization Purity in Triple Band Hexagonal Shaped Antenna |
| Manuscript Id: | IJMOT-2023-9-352604 |
| Abstract: | The proposed hexagonal shaped antenna is designed to possess circularly polarized triple resonating band operation using a novel technique of paired open-ended slot embedded around antenna axis. The open-ended slots cut at and along either side of horizontal axis of the hexagonal radiating patch create meandered electrical path which allows the current circulation at the center of patch to degenerate the two orthogonal modes for circular polarization (CP) radiation. Hexagonal antenna fed with CPW feed give rise wide impedance bandwidth and wide axial ratio bandwidth. Circular polarization purity is achieved by optimizing the length of paired open-ended slots. A rectangular tunable notch embedded in the ground plane controls the impedance bandwidth by limiting its upper edge frequency. The proposed antenna possesses a wide impedance bandwidth of 68.4%, axial ratio bandwidth (ARBW) of 57.14% and peak gain of 4 dB. The proposed circularly polarized antenna holds triple circularly polarized bands resonating at 1.52 GHz, 1.73 GHz and 3.78 GHz with axial ratio bandwidth (ARBW) of 15 MHz, 15 MHz and 2720 MHz respectively, which is about 0.98%, 0.98% and 57.14% with respect to center resonating frequency. Antenna reports peak gain of 4 dB. The magnitude of axial ratio near to 0dB for all bands indicates purity in CP.
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| Authors: | Pratap Shinde, Jayashree Shinde, Prajakta Gaikwad |
| Submitted On: | 21-09-2023 |
| Pages: | 7-15 |
| Action: | [Full Paper]
No. of Downloads: 64 |
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| Manuscript Title: | Particle SWARM Optimization for X- BAND Frequency-Reconfigurable SIW Antenna Using Integrated PIN Diode Switches |
| Manuscript Id: | IJMOT-2023-9-352607 |
| Abstract: | The paper presents an optimal structure of
a frequency reconfigurable SIW antenna, whose reconfigurability of this
structure is achieved using PIN diodes and optimization through the particle
swarm optimization (PSO) algorithm implemented and developed in MATLAB. The
antenna is based on Substrate Integrated Waveguide (SIW) technology with three
slot resonators located at the bottom of the antenna's SIW. PIN diodes are
positioned on the feedline of the antenna to change the resonant frequency of
the antenna and make it usable at different frequencies in Band X. The PSO
algorithm aims to find the optimum position of the PIN diodes and the size of
each slot according to the state of the PIN diode (ON or OFF). The optimized
reconfigurable SIW antenna is designed, manufactured, and measured to operate
in different frequency bands depending on the diode bias state. The measured
gain reaches maximum values of 8.6 dB, 9.4 dB, 9.2 dB, and 8.8 dB respectively
for OFF-OFF, OFF-ON, ON-OFF, and ON-ON bias states.
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| Authors: | Dahbi El khamlichi , Tajeddin Elhamadi, Naima Amar Touhami, Souhaila Ben Haddi, Nihad Taher |
| Submitted On: | 27-09-2023 |
| Pages: | 16-23 |
| Action: | [Full Paper]
No. of Downloads: 44 |
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| Manuscript Title: | Analysis of semi-circular cavity bandpass filter with Slots for 5G and WLAN Application |
| Manuscript Id: | IJMOT-2023-10-352609 |
| Abstract: | This study describes the design and implementation of microstrip bandpass filter for n77, n78 and n79 5G applications. The proposed bandpass filter analysis was carried out using ANSYS ELECTRONIC DESKTOP. The filters have been modelled, fabricated and their performance has been evaluated using Vector Network Analyzer. The proposed filter measures 40x40x1.6 mm3, which is significantly smaller. An impedance bandwidth of 2.54 GHz (fractional bandwidth of 25%) has been achieved with an insertion loss of less than 1 dB and return loss of 22 dB at both the resonating frequencies. Semicircular cavity bandpass filter has been designed with the center frequency of 3.7GHz. Insertion loss at 1 dB and impedance bandwidth at 2.54 GHz and a quality factor of 1.58 and 2 for the band pass frequencies between 3.7 and 5.2 GHz is seen in the simulated result. The designed bandpass filter occupies 50% space of the conventional filter. The designed bandpass filter consists of a surface current distribution of 9.95 A/m and 8.51 A/m across the operating frequencies. These results make the semi-Circular cavity bandpass filter suitable for n77 n78 and n79 5G bands.
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| Authors: | Surendra Babu Velagaleti, Siddaiah N |
| Submitted On: | 02-10-2023 |
| Pages: | 24-32 |
| Action: | [Full Paper]
No. of Downloads: 43 |
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| Manuscript Title: | Design and Analysis of Dual-Band Dual-Polarized Hybrid Half Cylindrical Dielectric Resonator Antenna for Satellite Base Station and Numerous Wireless Applications |
| Manuscript Id: | IJMOT-2023-10-352615 |
| Abstract: | This article presents a novel double -layered, dual band and dual polarized hybrid substrate integrated half cylindrical dielectric resonator antenna (SICDRA) for IRNSS satellite base station and various wireless applications. The SICDRA comprises of a unique top semi cylindrical dielectric resonator (DR) with top and side copper strips, circular hybrid substrate integrated waveguide (SIW) cavity and an inner circular ring type air gap cavity on upper FR4 substrate. To produce circularly polarized (CP) fields, two tilted rectangular cross slots of dissimilar size is etched in the middle layer. Also, the tilted cross slot and DR is excited through underneath microstrip feed line in the bottom of lower Rogers 5880 substrate. Due to the hybrid- embedded assembly, the fundamental mode TM01d excited at L5-band (1.164-1.188 GHz) and the other higher order TM02d mode excited at S-band (2.48-2.5 GHz) simultaneously. The proposed archetype has provided improved S11 < -25 dB for L5 band and < -15 dB for S-band, axial ratio (AR) more than 3 dB for L5 band. Moreover, a novel circularly arrange substrate integrated metallic and non metallic vias has boosted the realized gain at 5.63 dbic for circularly polarized L5 band and 4.81 dbi for linearly polarized S-band. The proposed structure is fabricated and tested in the anechoic chamber also. Also, the detail parametric analysis is carried out to achieve the desire results. Comparative result analysis shows proposed novel design has miniaturized DR radiating aperture, better reflection coefficient, dual polarization , improved realized gain and radiation performance compare to earlier techniques stated in the literature. |
| Authors: | Kaushal Patel, Falgun Thakkar |
| Submitted On: | 04-10-2023 |
| Pages: | 33-45 |
| Action: | [Full Paper]
No. of Downloads: 48 |
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| Manuscript Title: | UWB Four-Element MIMO Compact Antenna for Wireless Communication with tapered-fed dual Band-Notched Characteristics |
| Manuscript Id: | IJMOT-2023-10-352617 |
| Abstract: | In this article, a simple structure of a four-element multiple-input multiple-output (MIMO) antenna with dual sharp band rejection for ultra-wideband (UWB) applications has been proposed and experimentally validated. In the proposed design, four identical antenna elements were placed in such a way that it offered high inter-port isolation without extra decoupling structure. In this design Inverted L-type slits were incised on each radiating element to realize dual bands rejection characteristic at WLAN and IEEE INSAT/Super-Extended C bands. Simulated and Measured outcomes show that the designed antenna has an ultrawide operating band (2.93 to 20 GHz) with inter-port isolation of less than -22 dB. The overall size of the designed antenna is 34×39.6 mm2. It is envisaged that the suggested approach will be highly helpful in the development of a realistic high-performance MIMO antenna in terms of parameters like realized gain, efficiency, mean effective gain (MEG), and total active reflection coefficient (TARC). |
| Authors: | Sarabjeet Kaur, Bharti Chourasia |
| Submitted On: | 06-10-2023 |
| Pages: | 46-54 |
| Action: | [Full Paper]
No. of Downloads: 50 |
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| Manuscript Title: | Low Metalized DGS based Semi-Circular Ring Patch Antenna for Ultra Wide Band Applications |
| Manuscript Id: | IJMOT-2023-10-352619 |
| Abstract: | In this paper, an analysis and testing are carried out
on a Ultra wideband (UWB) microstrip patch antenna with low profile and less metallization.
The antenna geometry consists of a semi-circular ring radiator fed by a
microstrip line with a defected ground. The proposed antenna is fabricated on
FR-4 substrate having a dimension of 26×27×1.6 mm3 The SCR antenna resonating
at 9.3 GHz with reflection coefficients of -18.07dB, the antenna has a wide
band operating rage from (3.25 to 13.8) GHz with a bandwidth of 10.55 GHz and a
maximum gain of 2.99 dBi. Good agreement between the simulated and measured
results is observed. |
| Authors: | Kondalu Banavathu, Dattatreya Gopi, Krishna Dharavathu, Ravikanth Talluri |
| Submitted On: | 07-10-2023 |
| Pages: | 55-64 |
| Action: | [Full Paper]
No. of Downloads: 49 |
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| Manuscript Title: | Compact UWB Monopole Antenna with Wide Band Notching Using DGS Based Dual Mode Resonator |
| Manuscript Id: | IJMOT-2023-10-352624 |
| Abstract: | A simple
and compact ultra-wideband (UWB) antenna with a novel wide band notching using
Defected ground structure (DGS) based dual mode resonator is presented. This
proposed dual mode resonator is not only used for band notching but also helps
to increase the ground currents for better impedance matching over wide
bandwidth. The antenna has a thin vertical strip structure, which yields a
10dB return loss bandwidth from 3.1to10.6 GHz, band notching from 5.15 to 5.825
GHz, cross polarization of more than 20 dB, and good omni-directional radiation
pattern. Hence, this proposed antenna is more suitable for wireless systems
with high interference. |
| Authors: | S. Deborah, T. Jayanthy, S. Maheswari |
| Submitted On: | 15-10-2023 |
| Pages: | 65-70 |
| Action: | [Full Paper]
No. of Downloads: 31 |
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| Manuscript Title: | Reconfigurable Designs of E-shape and U-slot cut Rectangular Microstrip Antennas for Wideband and Circular Polarized Response |
| Manuscript Id: | IJMOT-2023-10-352625 |
| Abstract: | The E-shape and U-slot cut microstrip antennas have been widely reported to obtain the wideband and circularly polarized responses. By combining these two design features, wideband and circularly polarized designs of E-shape and U-slot cut rectangular microstrip antenna that offer right hand and left hand wave response in the circular polarized spectrum are presented in this paper. The reconfigurable design approach is considered to achieve the same. By selecting a suitable excitation of the RF diodes, wideband response or circular polarized response is obtained. In 900 MHz frequency spectrum, on total substrate thickness of 0.07?g, microstrip antenna offers impedance bandwidth of 22.07% and 21.64% while functioning in the wideband mode, in U-slot cut and E-shape patch. Using the reconfigurable E-shape design, it offers total 34.5% of input impedance bandwidth which contains 3.37 % of axial ratio bandwidth, towards the higher frequency band. Using the U-slot cut patch, these values are 31.5% and 1.35%, respectively. Reconfigurable approach combines the two operational features of the widely reported slot cut antenna thus providing the two responses using a single patch. Reconfigurable designs offer broadside radiation pattern with a peak gain of greater than 8 dBi. With the achieved antenna characteristics, proposed designs are useful in GSM applications in 800 – 1000 MHz frequency band. |
| Authors: | Amit A. Deshmukh, Aarti G. Ambekar, Venkata A. P. Chavali |
| Submitted On: | 17-10-2023 |
| Pages: | 71-79 |
| Action: | [Full Paper]
No. of Downloads: 44 |
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| Manuscript Title: | Low Profile High Gain Wideband Stacked MSA Array for 5G, WLAN and C-Band Applications |
| Manuscript Id: | IJMOT-2023-11-352643 |
| Abstract: | In this article, a novel low profile wideband high gain stacked microstrip antenna (MSA) array is proposed. This technique of enhancing gain and bandwidth of MSA array is novel and unique and not reported in literature to the best of authors’ knowledge. Bandwidth of MSA array is enhanced using reactive impedance surface (RIS) and slotted artificial magnetic conductor (AMC) surfaces while gain of the antenna is improved using four parasitic patches (PPs) placed above the patches of 2×2 MSA array for the first time. Electromagnetic coupling among nearby resonant frequencies of patches of MSA array, RIS, slotted AMC and PPs, provide wide bandwidth. The proposed structure is simple to design and has low profile and smaller dimensions. The antenna provides 12.3 dBi peak gain and 24.6% bandwidth from 5.0-6.4 GHz, which covers 5G, WLAN, and satellite C-band. 1.52 ?0×1.52 ?0 × 0.1 ?0 antenna has Front to back lobe (F/B) ratio >20dB, side lobe level (SLL) <-20 dB and cross-polar level (CPL) <-18 dB. ?0 is free-space wavelength at 5.7GHz. The structure offers better radiation parameters, smaller dimensions, and simple design techniques than the reported state of art antennas in the literature. The measured results of prototype fabricated antenna agree with simulated results. The proposed antenna is suitable for transceiver where the two WLAN bands can be used separately for transmission and reception, access point, 5G-V2X and satellite communication. |
| Authors: | Anjali Rochkari, Shubhangi Verulkar, Mahadu Trimukhe, Varsha Bodade, Rajiv K. Gupta |
| Submitted On: | 15-11-2023 |
| Pages: | 80-88 |
| Action: | [Full Paper]
No. of Downloads: 41 |
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| Manuscript Title: | Utilizing Deep Learning for Modeling and Design of Patch Antenna |
| Manuscript Id: | IJMOT-2023-11-352646 |
| Abstract: | This work introduces a new deep neural network technique for modeling patch antenna components. The use of artificial neural network (ANN) methods is increasingly recognized for its robustness in microwave design and modeling. The proposed deep neural network employs the ReLu as activation function . The key outputs of this proposed deep neural network are S-parameters, while the inputs consist of geometrical variables and frequency. The neural network's architecture is structured into one distinct segment handles both the geometrical and frequency inputs, we effectively utilize more training parameters to specifically learn the intricate relationship between S-parameters and geometrical variables, which ismore complex than the relationship between S-parameters and frequency. This approach aims toreduce the overall number of training parametersin the deep neural network model. Additionally, wedevelop new formulations to calculate thederivatives of the error function concerning thetraining parameters within the deep neuralnetwork. Leveraging these calculated derivatives,we propose an advanced training algorithm for thedeep neural network. This algorithm dynamicallydetermines the number of hidden layers in one partduring the training process, ensuring that theproposed deep neural network model achieves therequired model accuracy. Remarkably, ourproposed deep neural network achieves a similarlevel of model accuracy with fewer trainingparameters when compared to the commonly usedfully connected neural networks. To validate theeffectiveness of the proposed technique, wedemonstrate it through one example of PatchAntenna parametric modeling.
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| Authors: | Senasli Nour El Houda Sara, Chetioui Mohammed, Bouras Bouhafs, Senasli Lamia, Boudkhil Abdelhakim, Damou Mehdi |
| Submitted On: | 18-11-2023 |
| Pages: | 89-98 |
| Action: | [Full Paper]
No. of Downloads: 51 |
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| Manuscript Title: | A Very Compact and Highly Decoupled Four Element Antenna for n79 Band Application. |
| Manuscript Id: | IJMOT-2023-11-352650 |
| Abstract: | This article introduces an innovative antenna design specifically crafted for 5G mid-band applications, honing in on the 4.4-5.1 GHz frequency range. The standout feature of this design is its utilization of a 4-port Multiple-Input Multiple-Output (MIMO) configuration. This pioneering setup is meticulously optimized for the n79 band, a sub-6 GHz frequency segment allocated for 5G New Radio (NR) wireless communication. At its core, the initial design boasts a microstrip patch antenna housing a single element with a modified rectangular-shaped patch and a distinctive defective ground structure. The strategic placement of all four elements allows each to emit electromagnetic energy orthogonally to one another. This unique arrangement significantly enhances the antenna's isolation, showcasing an outstanding improvement of over 15 dB across the operational spectrum. Fabricated using a commercially available FR-4 substrate, renowned for its cost-effectiveness and widespread availability, the 4-port MIMO antenna boasts an array of advantageous design traits. It delivers a commendable gain of 3.8 dB, an impressive 87% efficiency, and maintains a low envelope correlation coefficient (ECC) of less than 0.1 between any pair of radiating components. Moreover, it demonstrates a substantial diversity gain (DG) approaching 10 dB. This antenna, with its superior attributes and performance metrics, emerges as an enticing choice for seamless integration into expanding 5G networks, presenting a leap forward in antenna technology tailored for the demands of advanced wireless communication.
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| Authors: | P. Sundara Vadivel, R. Augustian Isaac, P. Senthil Pandian, D. Rajesh Kumar |
| Submitted On: | 23-11-2023 |
| Pages: | 99-108 |
| Action: | [Full Paper]
No. of Downloads: 48 |
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| Manuscript Title: | Imaging Receiver for Fairness of NOMA-VLC Systems |
| Manuscript Id: | IJMOT-2023-9-352590 |
| Abstract: | In this work, an imaging receiver is proposed to enhance user fairness and reduce the outage probability in non-orthogonal multiple access (NOMA) based on visible light communication (VLC) systems. One of the key advantages of employing this type of receiver, which contains arrays of pixels, is the ability to achieve the orientation of any pixel towards one transmitter, which means that numerous transmitters can be realized by the imaging receiver at its position. This enables the system to satisfy the balancing of users between transmitters efficiently. At each user terminal, an electrical power observer (EPO) is installed to observe the channel conditions between users and transmitters. Based on the feedback signals from EPO, the system splits the users into small groups and each group is related to one transmitter. Results show that our proposed system can serve up to 15 uses with user fairness equal to 1, with a data rate of up to 70Mbps while the error rate (BER) is less than 10-6 with acceptable outage probability. |
| Authors: | Safwan Hafeedh Younus, Mohamad A. Ahmed |
| Submitted On: | 03-09-2023 |
| Pages: | 109-116 |
| Action: | [Full Paper]
No. of Downloads: 29 |
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| Manuscript Title: | Proposed Beamforming Combined With Downlink STLC And Uplink STBC For Wireless Sensor Network |
| Manuscript Id: | IJMOT-2023-10-352626 |
| Abstract: | Use space-time line coding (STLC) and block coding (STBC) are of interest in wireless sensor networks (WSN). They all bring the most incredible diversity gain to the information system. This gain can be proportional to the product of the number of transmit and receive antennas. However, one issue that needs attention is the bit error ratio (BER). When channel state information (CSI) is known at the transmitter, it uses STLC for the downlink, and STBC for the uplink can improve BER. In cases where CSI is known to both the transmitter and receiver, these encoding techniques, when combined with beamforming, will result in even lower bit rates. This paper focuses on this combination to improve BER in multipath environments. |
| Authors: | Hoai Trung Tran |
| Submitted On: | 17-10-2023 |
| Pages: | 117-125 |
| Action: | [Full Paper]
No. of Downloads: 24 |
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| Manuscript Title: | Characteristics Evaluation of Optical Fiber Length in Light Detection and Ranging (LiDAR) |
| Manuscript Id: | IJMOT-2023-11-352651 |
| Abstract: | Light Detection and Ranging (LiDAR) commonly uses fiber optic as the transmission medium because it can monitor over long distances, has strong resistance from extreme environments, and has anti-electromagnetic interference. According to previous research, LiDAR characteristics related to the effect of fiber optic length on FMCS-based LiDAR applications have not been analyzed. The novelty of this research is that it uses a distance sensor designed using the FMCW-based LiDAR method. Therefore, this study in FMCW-based LiDAR was carried out to determine the characteristics of optical fiber in length variations. Analysis was obtained by comparing the effect of optical fiber length on attenuation through power loss and time delay during the transmission process. When the time delay occurred, the photodetector transmitted and reflected the beam. Fiber optic length is exponentially related to attenuation with y = 0.2064e0.0073x. Meanwhile, the time delay is linearly proportional with y = 69.849x + 9.149. Besides, the study also gets the effect of optical fiber absorption, connection, bending, lens attenuation, free space, and refractive index homogeneity that can be used as the basis for the following LiDAR technology development. |
| Authors: | M.A. Rahmatulloh, D. Hanto, M. Yantidewi, M. Khoiro, A. Rianaris, E.J. Pristiyanto. D. Kurniawan, R.A. Firdaus |
| Submitted On: | 24-11-2023 |
| Pages: | 126-131 |
| Action: | [Full Paper]
No. of Downloads: 46 |
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