Bidirectional Adolescent 1 Adolescent Behavior 1 Adolescents 1 Adult 1 Antenna arrays 1 Anxiety 1 Article 1 Bandwidth 1 Broad-band antenna 1 Child 1 Circular polarization 1 Circularly polarized antennas 1 Coaxial probe feed 1 Dipole antennas 1 Electric excitation 1 Electric impedance 1 End-fire 1 Endfire circularly polarized antenna 1 Female 1 Humans 1 IoT 1 Loneliness 1 Magnetic resonance 1 Magnetic separation 1 Male 1 Microwave antennas 1 Panic 1 Parent-Child Relations 1 Parenting 1