Planar Array Antenna with Radiation Pattern Reconfigurability Using PIN Diode
Modern data communication, such as wireless technology with IEEE 802.11 b/g/n standard, requires the antenna with the ability to conform to the changing environment. In this research, antenna capable of being reconfigured to adjust of the changing environments is proposed. The antenna is printed...
Saved in:
| Main Author: | |
|---|---|
| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/35502 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Modern data communication, such as wireless technology with IEEE 802.11 b/g/n
standard, requires the antenna with the ability to conform to the changing
environment. In this research, antenna capable of being reconfigured to adjust of
the changing environments is proposed. The antenna is printed on two layers of
circular FR4 Epoxy dielectric substrate (relative permittivity of 4.2, tangent loss
of 0.02, thickness of each of 1.6 mm). On top side of the first layer, eight square
patches workable at the frequency of 2.4 GHz are fed using a microstrip feeding
line based on proximity coupling technique. The size of each patch is 30×30 mm2.
The angular distance between adjacent patches is 45°. The microstrip feeding line
is printed on top side of the second layer, while the groundplane (diameter 270
mm) is placed on the reverse side. PIN diodes (SMP1345-079LF) are
implemented at the end of microstrip feeding line arms to modify the radiation
pattern behaving like a switch that connects or disconnects the feeding line to the
groundplane. Chip capacitors (100 pF) are placed between PIN diodes and
microwave source to block the direct current (DC) travelling to the microwave
source. Meanwhile, chip inductors (33 ?H) are placed between PIN diodes and
DC source to prevent alternating current (AC) moving to the DC source. When
two antennas, positioned across from each other, are set to active, measured
reflection coefficient is -14.39 dB at the frequency of 2.4 GHz. The measured
antenna has -10 dB working bandwidth of 240 MHz from 2.32 GHz to 2,56 GHz
and gain of 0.25 dBi. |
|---|