The document describes the design and simulation of a basic half-wave dipole antenna. Key points:
1) The aim is to design a dipole antenna for a given frequency of 3.3 GHz and study the effects of varying the dielectric constant and substrate thickness on the radiation properties and frequency response.
2) Important antenna characteristics to consider include radiation patterns, gain, and frequency response.
3) The half-wave dipole antenna is designed with each arm measuring 22.725mm to operate at the target frequency, and each arm width is 4.545mm.
4) Simulation shows the antenna operates at 2.8GHz with a return loss of -14.50dB and gain of
2. AIM
• The aim is to design and simulate a basic
dipole antenna on a given ‘frequency’ and
study the radiation properties and frequency
responses through various antenna
parameters i.e.., relative Dielectric constant
(εr), substrate thickness (t).
3. Technical objective
• There are several important antenna
characteristics that should be considered
when choosing an antenna for your
application as follows:
1).Antenna radiation patterns
2).Gain
3).Frequency response
4. DESCRIPTION
• Half wave dipole antenna consists of two identical
conductive elements such as metal rods which are
bilaterally symmetrical. The "half-wave" term means
that the length of this dipole antenna is equal to a
half-wavelength at the frequency of operation.
• It is basically fed in the center where the impedance
falls to lowest. The voltage and current levels vary
along the length of the radiating section of the
antenna. For a dipole antenna that is an electrical
half wavelength long, the inductive and capacitive
reactance cancel each other and the antenna
becomes resonant.
5. DESIGN
• Design and simulate a basic dipole
antenna on a given
frequency f0 (GHz)=3.3
• Length of dipole =
λ
4
• Width of dipole =
λ
20
6. SIMULATION
Designed for 3.3 GHz operation on
a substrate with 1.6 mm thickness.
𝑓 =
𝑐
λ
λ=90.9mm
where c=3*1010
mm
Each Arm length= λ/4=22.725mm
Each width of arm= λ/20=4.545mm
8. RADIATION MECHANISM
• A half-wave dipole antenna
receiving power from a radio
wave. The electric field of the
wave (E) pushes the electrons
in the antenna elements and
charging the ends of the antenna alternately
positive and negative. Since the antenna is a half-
wavelength long at the radio wave's frequency, it
excites standing waves of voltage (V) and current
in the antenna. These oscillating currents flow
down the transmission line into the radio receiver
(represented by the resistor R).
9.
10. CONCLUSION
The aim of our project is to design & simulation
of Dipole antenna. The measured antenna gain
reaches about 2.732 dB. From the simulation
results, it shows that operates in 2.8GHz with a
return loss of -14.50dB
