Trainers

GSM

ante

nna

MonopoleYagi

Funct

ionalit

y Monopole antenna’s

signal strength was -80dbmYagi antenna’s signal

strength was 70dbmBetter than the stock

GSM antenna

Learn

ing p

oin

ts

Learnt how to construct a GSM antennaLearnt how to solder

Learnt what materials

go into a GSM antenna

and what components

to buy (or not to buy)

Reflect

ions

Interesting experience

Had to go to Sim Lim

Tower multiple times

to get the correct materials, effort was

not wastedSurprised that our Yagi

antenna worked so well even though we

did not use a copper

base

Leve

l shifte

r

Does not work (yet)Lacks the code

required for the GSM

antenna to interpret

the commands sent via the Arduino board

Transmitting signals works

Learn

ing p

oin

ts

How to interpret datasheetsHow to construct the

level shifter using the

Max232 ICHow to use a CRO to

monitor data transmission

Reflect

ions

Disappointed it did not

workNeed more time to figure out the code

Will be putting some

extra time during holidays to make it work

Q&AThanks!