A miniaturized LoRaWAN IoT antenna with 923 MHz operating frequency

Name: Warin Wanpare

keyword: LoRaWAN.

LCSH: Monopole antennas.

LCSH: Antennas (Electronics)

LCSH: Internet of things.

Abstract: This thesis presents design and measurement verification of a compact monopole antenna with 923 MHz operating frequency for LoRaWAN Internet of Things (loT) applications. The size of the proposed antenna is 13.11 x 22.95 mm2 which is extremely small compared to the wavelength at the operating frequency. The substrate material is FR-4 with a nominal relative dielectric constant of = 4.3, loss tangent of tan =0.2 and a thickness of 1.6 mm. Miniaturization of the proposed antenna was achieved by using a short stub similar to the case with an inverted-F antenna combined with a folded monopole radiator. The measurement results of the proposed antenna show an impedance matching bandwidth of 4.5 MHz and a peak gain of -11.86 dBi with an omnidirectional radiation pattern. The low gain is typical for an electrically small antenna of this size according to the physical gain limit. Due to its extremely compact size, the proposed antenna is a good candidate for small loT devices which can easily be integrated to physical objects in everyday life.

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Name: Suramate Chalermwisutkul

Role: thesis advisor.

Email : suramate.c@tggs.kmutnb.ac.th

Created: 2022

Modified: 2567-12-24

Issued: 2024-12-24

วิทยานิพนธ์/Thesis

application/pdf

eng

DegreeName: Master of Engineering

Level: Master's Degree

Descipline: Electrical and Software Systems Engineering (International Program)

Grantor: King Mongkut's University of Technology North Bangkok

©copyrights King Mongkut's University of Technology North Bangkok

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