Bluetooth Lecture

1. Prof. Neeraj Bhargava
Pramod Singh Rathore
Department of Computer Science
School of Engineering & System Sciences,
MDS, University Ajmer, Rajasthan, India
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2.  An antenna is an electrical device which
converts electric energy into radio waves, and
vice versa. It is usually used with a radio
transmitter or radio receiver.
 An antenna is a device for standing or
receiving electromagnetic waves.

3. An antenna used to
converts electromagnetic
waves in to electrical
energy.

4. Dipole Antenna
Vertical Antenna

5.  The dipole antenna consists of two poles or
items – two conductive elements.
 A dipole antenna is a straight electrical
conductor measuring ½ wavelength from end
to end and connected at the center to a
radio-frequency(RF)feed line.
 This antenna , also called a doublet.

6.  Vertical antennas from a widely used form a
radio antenna.
 Vertical antenna exhibit an unidirectional
radiation pattern in the horizontal plane.
 Vertical antenna types are normally easy to
mount.
 It should be stand an closest possible spot
away from obstacles.

7.  Bandwidth
 VSWR(voltage standing wave ratio)
 Return loss
 Efficiency
 Polarization.

8.  The bandwidth of an antenna expresses its
ability to operate over a wide frequency
range..
 2.4 GHz ISM Band used by Bluetooth devices range
from (2400-2483) MHz .

9. It measure the
mismatch of
impendence between
the transmission line
and its respective
antenna.

10. It measure the performance
of antenna.
It is measure in db( decibels)
units.
It is loss of power in the
signal returned by a
transmission line.

11.  It is define as the direction of electrical field
in comparison with the earth surface.
 A electric field generally occupy the a similar
plane as that of antenna transmitter.
 Type of polarization
◦ Vertical
◦ Horizontal
◦ circular

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