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Design of a Size Reduced Antenna Array for Angle of Arrival (AoA) Estimation for BLE 5.1

Långberg, Felix LU and Thurborg, Jonas LU (2020) EITM01 20201
Department of Electrical and Information Technology
Abstract (Swedish)
Bluetooth low energy (BLE) 5.1 allows for Angle of Arrival(AoA) measurements
which in turn requires antenna arrays to be used. These arrays must be low power
which results in that an efficient switching pattern is applied and for greater field
of view good omnidirectivity is necessary. BLE devices are typically small in size
and therefore size reduction of these arrays are of interest. The typical spacing
between antennas in arrays are 0.5λ which is around 6 cm and become rather
large. In this thesis a size reduced L-shaped antenna array consisting of three
antenna elements with 0.3λ spacing is simulated. Two major studies were made
with various spacings between 0.25 and 0.5λ, both physical measurements on a
three element... (More)
Bluetooth low energy (BLE) 5.1 allows for Angle of Arrival(AoA) measurements
which in turn requires antenna arrays to be used. These arrays must be low power
which results in that an efficient switching pattern is applied and for greater field
of view good omnidirectivity is necessary. BLE devices are typically small in size
and therefore size reduction of these arrays are of interest. The typical spacing
between antennas in arrays are 0.5λ which is around 6 cm and become rather
large. In this thesis a size reduced L-shaped antenna array consisting of three
antenna elements with 0.3λ spacing is simulated. Two major studies were made
with various spacings between 0.25 and 0.5λ, both physical measurements on a
three element prototype array and simulations showed that 0.3λ was the smallest
spacing achievable without compromising AoA compatibility. The final simulated
antenna array shows peak gain at 2.55 dB and resonance at 2.44 GHz as well as a
field of view of around 100 degrees. (Less)
Please use this url to cite or link to this publication:
author
Långberg, Felix LU and Thurborg, Jonas LU
supervisor
organization
course
EITM01 20201
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Antenna, Array, Bluetooth, 5.1, Angle of arrival, optimization
report number
LU/LTH-EIT 2020-794
language
English
id
9031557
date added to LUP
2020-11-04 09:44:00
date last changed
2020-11-04 09:44:00
@misc{9031557,
  abstract     = {{Bluetooth low energy (BLE) 5.1 allows for Angle of Arrival(AoA) measurements
which in turn requires antenna arrays to be used. These arrays must be low power
which results in that an efficient switching pattern is applied and for greater field
of view good omnidirectivity is necessary. BLE devices are typically small in size
and therefore size reduction of these arrays are of interest. The typical spacing
between antennas in arrays are 0.5λ which is around 6 cm and become rather
large. In this thesis a size reduced L-shaped antenna array consisting of three
antenna elements with 0.3λ spacing is simulated. Two major studies were made
with various spacings between 0.25 and 0.5λ, both physical measurements on a
three element prototype array and simulations showed that 0.3λ was the smallest
spacing achievable without compromising AoA compatibility. The final simulated
antenna array shows peak gain at 2.55 dB and resonance at 2.44 GHz as well as a
field of view of around 100 degrees.}},
  author       = {{Långberg, Felix and Thurborg, Jonas}},
  language     = {{eng}},
  note         = {{Student Paper}},
  title        = {{Design of a Size Reduced Antenna Array for Angle of Arrival (AoA) Estimation for BLE 5.1}},
  year         = {{2020}},
}