Browsing by Author "Narbudowicz, Adam"
Now showing items 1-20 of 20
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3D Beam-Steering MIMO Antenna for On-Body IoT Applications
Zandamela, Abel; Marchetti, Nicola; Ammann, Max J.; Narbudowicz, Adam (IEEE, 2023)In this article, a compact 3D beam-steering MIMO antenna operating at 5.75 GHz is proposed for on-body Internet of Things (IoT) applications. The planar antenna comprises a central patch and two concentric annular rings. ... -
Angle of Arrival Estimation Via Small IoT Devices: Miniaturized Arrays vs MIMO Antennas
Zandamela, Abel; Chiumento, Alessandro; Marchetti, Nicola; Narbudowicz, Adam (2022)This tutorial discusses the problem of Angle-of-Arrival (AoA) estimation from small Internet of Things (IoT) devices. It reviews the limitations and challenges of existing miniaturization strategies, which involve classical ... -
Compact Beamforming Antennas for Directional Modulation in IoT
Narbudowicz, Adam; Zandamela, Abel (2023)The paper discuss a PHY-layer security technique known as Directional Modulation (DM) and its implementations with compact beamforming antennas. The motivation is to allow DM to operate from small and low-complexity IoT ... -
Compact broadband triple-ring five-port reflectometer for microwave brain imaging applications
Narbudowicz, Adam (2019)The broadband five-port reflectometer (FPR) is proposed using a triple-ring based technique. The design introduces a tapering in the inter-ring transmission lines (TLs), which provides additional degrees of freedom for ... -
Compact MIMO Antenna for MUSIC-Based Angle of Arrival Estimation in Wrist-Worn Devices
Zandamela, Abel; Marchetti, Nicola; Narbudowicz, Adam (IEEE, 2022)In this work, we propose a compact Multiple-Input Multiple-Output (MIMO) antenna for wrist-worn devices. The design is capable of unidirectional beamsteering across the entire horizontal plane, a property that is exploited ... -
Compact MIMO Antennas for Localization and PHY layer Security in Wrist Worn IoT Devices
Zandamela, Abel Abdul; Marchetti, Nicola; Ammann, Max J.; Narbudowicz, Adam (SFI, 2022)On-body IoT technologies, like wrist-worn devices, are becoming a key enabler of many cutting-edge applications such as connected healthcare systems (e.g, patient monitoring, in-hospital localization, sports fitness, and ... -
Compact ultra-wideband monopole antenna loaded with metamaterial
Narbudowicz, Adam (2020)A printed compact monopole antenna based on a single negative (SNG) metamaterial is proposed for ultra-wideband (UWB) applications. A low-profile, key-shaped structure forms the radiating monopole and is loaded with ... -
Digital pattern synthesis with a compact MIMO antenna of half-wavelength diameter
Zandamela, Abel Abdul; Narbudowicz, Adam (2021)The paper presents a compact multiport antenna, with beamforming capabilities and a realized gain of 4.31 dBi with the size of λ/2. The antenna allows digital beamforming with independent control over three parameters: ... -
Directional Modulation for Enhanced Privacy in Smart Watch Devices
Zandamela, Abel Abdul; Marchetti, Nicola; Narbudowicz, Adam (2023)This article studies security aspects of data transmission in on-body Internet of Things (IoT) devices through the use of Directional Modulation (DM) from a smart watch integrated antenna. DM is a beamsteering-based Physical ... -
Energy Efficient Dynamic Directional Modulation with Electrically Small Antennas
Marchetti, Nicola; Narbudowicz, Adam (2022)This letter proposes a compact and energy efficient Directional Modulation (DM) scheme for small and power constrained devices (e.g. Internet of Things wireless sensors). The scheme uses a uniform circular array of monopole ... -
Feasibility Study of an Industrial Moisture Content Sensor Based on Wheeler Cap
Pratoomma, Prakorn; Zandamela, Abel; Chalermwisutkul, Suramate; Narbudowicz, Adam (IEEE, 2021)The paper proposes a technique for sensing of moisture content of a waste paper block based on Wheeler Cap measurement method. The technique allows sufficient penetration into the sample due to relatively low frequencies ... -
Measurement of orientation and distance change using circularly polarized UWB signals
Narbudowicz, Adam (2022)The paper proposes methodology to employ circularly polarized UWB signals for simultaneous measurement of orientation and distance changes between transmitter and receiver. The proposed technique uses the rotational Doppler ... -
Metamaterial cell-based superstrate towards bandwidth and gain enhancement of quad-band CPW-fed antenna for wireless applications
Narbudowicz, Adam (2020)A multiband coplanar waveguide (CPW)-fed antenna loaded with metamaterial unit cell for GSM900, WLAN, LTE-A, and 5G Wi-Fi applications is presented in this paper. The proposed metamaterial structure is a combination of ... -
Non-Contact Radio Frequency Level Sensor Based on Wheeler Cap
Pratoomma, Prakorn; Zandamela, Abel; Narbudowicz, Adam; Chalermwisutkul, Suramate (2023)In this paper, we propose a novel non-contact liquid level sensor based on the Wheeler cap. The sensor utilizes an electrically small antenna operating at 276 MHz enclosed within a metal cap, in conjunction with the liquid ... -
On the distortion of UWB circularly polarized time-domain pulses in presence of rotation
Narbudowicz, Adam (2019)The paper provides a first theoretical study on the effect of rotational Doppler on circularly polarized pulsed communication. Despite the circularly polarized communication being considered immune to signal fading due to ... -
On the Efficiency of Miniaturized 360° Beam-Scanning Antenna
Zandamela, Abel Abdul; Narbudowicz, Adam (IEEE, 2019)The efficiency and beam-scanning performance of a compact, beam reconfigurable antenna are presented. The proposed design provides a 360° reconfigurable bidirectional radiation pattern in the horizontal plane by using phase ... -
Pattern and Polarization Diversity Multi-Sector Annular Antenna for IoT Applications
Zandamela, Abel; Marchetti, Nicola; Ammann, Max J.; Narbudowicz, Adam (IEEE, 2023)This work proposes a small pattern and polarization diversity multi-sector annular antenna with electrical size and profile of ka = 1.2lambda and 0.018lambda, respectively. The antenna is planar and comprises annular sectors ... -
Physical Limitation of Range-Domain Secrecy Using Frequency Diverse Arrays
Narbudowicz, Adam (2020)In this paper, the concept and recent development of exploiting frequency diverse array (FDA) and its variants for the physical-layer wireless security have been revisited and carefully examined. Following rigorous analytical ... -
RSS-based indoor localization system with single base station
Narbudowicz, Adam (2022)The paper proposes an Indoor Localization System (ILS) which uses only one fixed Base Station (BS) with simple non-reconfigurable antennas. The proposed algorithm measures Received Signal Strength (RSS) and maps it to the ... -
Small Dual-Band 3D Beamforming MIMO Antenna
Zandamela, Abel Abdul; Marchetti, Nicola; Narbudowicz, Adam (IEEE, 2023)This work proposes a small dual-band (2.4 GHz and 4.89 GHz bands) 3D beamforming Multiple-Input Multiple-Output (MIMO) antenna for emerging size-constrained Internet of Things (IoT) applications. The performance is realized ...