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    A Study of Low Band UWB Localization with Wooden and Metal Bookshelves Based on Measurement Data
    (2024-01-01)
    Mankong, Thanadon
    ;
    Promwong, Sathaporn
    ;
    Bunlaksananusorn, Chanin
    This paper considers the potential of Impulse-Radio Ultra-Wideband (IR-UWB) technology which can be a barcodes replacement in bookshelf management systems. To assess its feasibility, we analyze IR-UWB propagation characteristics within bookshelf environments, particularly focusing on the impact of wooden and metal structures. A measurement-based evaluation scheme is employed, utilizing a vector network analyzer (VNA) alongside microstrip patch antennas for both the transmitter (Tx) and receiver (Rx) operating within a frequency range of 3.2GHz to 4.8GHz. The path loss, received signal strength (RSS), and cumulative distribution function (CDF) of the measured data are then analyzed to evaluate the suitability of IR-UWB for bookshelf management applications. These findings will inform the design of IR-UWB antennas and the overall assessment of this technology in this specific context
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    Evaluation of UWB antennas at 7-9 GHz for short range wireless communications
    (2018-06-08)
    Chinabutr, Chatchawin
    ;
    Promwong, Sathapom
    Ultra wideband (UWB) impulse radio (IR) signals must be able to accomodate its common frequency band at 7.25 GHz to 8.50 GHz. Moreover, the signals should not be distorted too much when they pass through the antennas. Therefore, the transfer function of antennas must to known for the channel performance. In free space loss is usually evaluated by using the formula of Friis's. However, Friis's formula it's not directly applicable to UWB-IR transmission. This study to presentation, the characterization of UWB-IR transmission in FCC with common frequency band that takes into account the transmission waveform in UWB, its consider the distortion due to the antennas and the correlator receiver. Since the antennas are significant pulse-shaping filters in UWB, various kinds of antennas are experimentally examined, especially focusing on the effect of template waveform receiver.
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    A novel analysis of IR-WPAN transmission using Friis' transmission formula
    (2017-11-03)
    Udomsom, Sittan
    ;
    Yooyativon, Thongchai
    ;
    Chaisricharoe, Roungsan
    ;
    Kamyod, Chayapol
    ;
    Promwong, Sathaporn
    Impulse radio (IR) transmission is consider used in wireless personal area network (WPAN) for high speed and low power transmission and new innovation wireless technology. This paper propose a novel analysis of impulse radio transmission in WPAN for ultra wireless communications. The waveform distortion due to the antennas should be considered. The optimum and isotropic template receivers are considered based on Friis transmission formula. In this experimental study, the biconical antennas are uesd as the transmitter (Tx) and the receiver (Rx) antennas. The rectangular passband, which is satisfied the full band of UWB-IR definition and Federal Communications Commission (FCC) indoor limit spectral masks, is used as the transmitted waveform of UWB system. The channels are measured in an anechoic chamber by using a vector network analyzer (VNA). The measured data are evaluated in path loss of optimal and isotropic template receivers, the IR transmission gains and BER are shown and compared in results.