Forthcoming and Online First Articles

International Journal of Ultra Wideband Communications and Systems

International Journal of Ultra Wideband Communications and Systems (IJUWBCS)

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International Journal of Ultra Wideband Communications and Systems (5 papers in press)

Regular Issues

  • Multiband fractal antenna for 5G communications and IoT applications   Order a copy of this article
    by Amsaveni A 
    Abstract: The need for an efficient, low-loss compact antenna emerges with the advent of 5G wireless networking technology suitable for IoT applications and many other fast wireless communications. Microstrip patch antennas are highly suitable for such applications. Fractal antennas provide compactness and improved efficiency in the desired frequencies of operations. A novel three-layered multiband fractal antenna with hexagonal geometry suitable for both fourth-generation/fifth-generation wireless communications and IoT applications has been designed. The antenna is designed to resonate at three spectral bands viz., 2.6 GHz (LTE), 3.6 GHz (sub-6 GHz 5G), and 5.25 GHz (LTE-U). The simulation is done using ADS software and the results of the proposed antenna have a minimum return loss of nearly -20 dB in all three spectral bands. The results obtained are validated experimentally using an N9916A microwave analyser.
    Keywords: fractal antenna; multiband; 4G-LTE; sub-6GHz 5G; IoT.
    DOI: 10.1504/IJUWBCS.2024.10063850
     
  • Energy-Efficient Low-Complexity Detection of PPM Signals at the Presence of Monobit Quantisation   Order a copy of this article
    by Hassan Khani 
    Abstract: Conventional energy detection (ED) pulse position modulation (PPM) receivers have low complexity but very poor performance and severely reduced achievable rate. To solve these problems, we can employ a matched-filter (MF) receiver. However, an MF receiver requires channel state information, which makes the complexity of the receiver unacceptable. To achieve superior performance and higher rates at a much lower complexity, monobit digitisation is employed to transfer the required signal processing into the digital domain and alleviate the problem. In this paper, two energy-efficient low complexity monobit PPM receivers are proposed which provide higher performance and data rates, compared with the conventional ED-PPM receivers. The main contribution of the paper is the employment of suboptimal weights of non-coherent BPSK monobit receivers for the detection of monobit digitised PPM signals. Since the proposed detection methods are simple, they are promising for applications requiring low complexity, high rate, high performance, and low power consumption.
    Keywords: energy detection; ED; monobit ADC; quantisation noise; pulse position modulation; PPM; transmitted-reference; TR; ultra-wideband; UWB.
    DOI: 10.1504/IJUWBCS.2024.10064724
     
  • Design and Analysis of Balun for 3-4 GHz Ultra-Wide Band Receiver Front End for Wireless Communication   Order a copy of this article
    by Pradeepkumar S, Parameshachari B.D. 
    Abstract: The frequency range for the ultra-wideband (UWB) system is allotted in a range that starts at 3.168 GHz and goes all the way up to 10.650 GHz. We suggest a method for designing and satisfying the criteria for the manufacture of a compact, lightweight, dependable, and steady ultra-wideband receiver for wireless connectivity. This receiver would be ideal for applications such as medical imaging and radar. We devised and produced a stable receiver that was suitable for wireless connection by virtue of its reduced noise figures, smooth gain properties, and low noise qualities. The construction and functioning of a bare MMIC device may be accomplished via the use of this technology by using the chip-and-wire procedure. An amplification, mixer, multiplier, and filter designed for frequency band properties were constructed and implemented in the recipient.
    Keywords: ultra wideband; receiver; wireless communication; active-balun circuit.
    DOI: 10.1504/IJUWBCS.2024.10065380
     
  • A Compact Coupled line Microstrip Band Pass Filter for Wireless Receiver Applications   Order a copy of this article
    by Thiyagarajan Krishnan, B. Pradeip, M. Pavithra, S. Sona, Prikshit Singh 
    Abstract: A microstrip based compact band pass filter is presented for wireless receiver applications. The filter is designed using fifth order Butterworth coefficients to get flat pass band response. The coupled line approach is followed in the layout implementation of the filter. The compact coupled line band pass filter structure was achieved by miniaturing the conventional coupled line structure. The conventional coupled line filter and its miniaturised structure are fabricated in an FR4 substrate of dielectric constant 4.6 and thickness 1.6 mm. The area of the conventional coupled line filter is optimised using inverted C shape. The performance of both the filters was verified using vector network analyser based two port scattering parameter measurements. The proposed compact coupled line filter provides a satisfactory performance from 2.05 GHz to 2.88 GHz with maximum pass band insertion loss of 1.62 dB during measurements.
    Keywords: wireless; RF receiver; coupled line; insertion loss; band pass filter; microstrip.
    DOI: 10.1504/IJUWBCS.2024.10067279
     
  • Inspection of Breast Phantom Layers using UWB Antenna   Order a copy of this article
    by Sonal Patil, Khushboo Singh, Ashwini Naik 
    Abstract: Breast cancer is the second leading cause of cancer deaths in women globally. Early detection and treatment can reduce mortality rates. Microwave sensing offers a cost-effective, non-invasive, and comfortable method; which utilises antenna sensor as key component due to significant contrasts in dielectric properties of breast tissues. This work presents the design and fabrication of a hexagonal-shaped ultra-wideband antenna and breast phantom to examine the different tissues of breast phantom. The system model comprises antenna and breast phantom is modelled by using HFSS simulator and tested using VNA N9916A to validate the reflection characteristics. The changes in the reflection characteristics of breast tissues are inspected. The radiations from antenna are interacted with breast tissues, which accounts for the dispersive effect due to their lossy dispersive nature for microwave propagation. The resulting signals from these biological elements are influenced by microwave characteristics such as absorption, transmission, and reflections.
    Keywords: microstrip antenna; MSA; hexagonal microstrip antenna; HMSA; breast phantom; dielectric properties; ultra-wideband; UWB.
    DOI: 10.1504/IJUWBCS.2024.10067280
     

 

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