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Bluetooth® Angle of Arrival (AoA) Antenna Design
TIDA029A
july 2019 – june 2023
CC2640R2F-Q1
,
CC2642R
,
CC2642R-Q1
CONTENTS
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Bluetooth® Angle of Arrival (AoA) Antenna Design
1
Bluetooth Angle of Arrival (AoA) Antenna Design
Trademarks
1
Introduction
2
Angle of Arrival Antenna Design Considerations
2.1
Antenna Spacing
2.2
RF Switch Considerations
3
Dipole Antenna Array
3.1
Dipole Antenna Strengths and Weaknesses
3.2
Angle Measurement Plane
3.3
PCB Implementation
3.4
Two Dipole Array Test Results
3.4.1
Total Radiated Power (TRP)
3.4.2
Measuring Antenna 1 and 2 Phase Difference
3.4.2.1
Bare PCB
3.4.2.2
PCB + RF Absorbing Material
3.4.2.3
PCB + RF Absorbing Material + Tin-Plated Copper Foil
3.4.2.4
PCB + RF Absorbing Material + Tin-Plated Copper Foil + Metal
3.4.3
Phase Difference vs Distance
4
Calculating AoA From IQ Measurements
4.1
Dipole Antenna Array Uncompensated Angle of Arrival Results
4.1.1
Bare PCB Uncompensated AoA
4.1.2
PCB + RF Absorbing Material Uncompensated AoA
4.1.3
PCB + RF Absorbing Material + Tin-Plated Copper Foil Uncompensated AoA
4.1.4
PCB + RF Absorbing Material + Tin-Plated Copper Foil + Metal Uncompensated AoA
4.2
Dipole Antenna Array Compensated AoA Results
4.2.1
Bare PCB AoA With Compensation
4.2.2
PCB + RF Absorbing Material + Tin-Plated Copper Foil Compensated AoA
4.2.3
PCB + RF Absorbing Material + Tin-Plated Copper Foil + Metal Compensated AoA
4.2.4
Hardware Setup Compensated Results Comparison
5
References
6
Revision History
IMPORTANT NOTICE
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Application Note
Bluetooth® Angle of Arrival (AoA) Antenna Design