Hi, all.
I am now doing a project on 433 mhz RF. What i am building is two seperate modules. One as a transmitter and the other as receiver. For transmitter i am using maxim's max1472 ask transmitter. Receiver side i am using a comparator circuit.
The projected communication range between these two modules is 1 to 1.5 meters. I already achieved it by using a quarter wave length whip (17.2cm) on both transmitter side and receiver side. But the ultimate product should be a handheld box with small antenna. It could be pcb antennas (loop, semiloop, modified dipole) or microstrip antenna. However when i tested other forms of antennas, the communication range drops to about 0.3-0.6 meters.
Did any one have any ideas of building tiny antenna for 433 mhz applications? Any ideas is favorable.
Wanchope
I am now doing a project on 433 mhz RF. What i am building is two seperate modules. One as a transmitter and the other as receiver. For transmitter i am using maxim's max1472 ask transmitter. Receiver side i am using a comparator circuit.
The projected communication range between these two modules is 1 to 1.5 meters. I already achieved it by using a quarter wave length whip (17.2cm) on both transmitter side and receiver side. But the ultimate product should be a handheld box with small antenna. It could be pcb antennas (loop, semiloop, modified dipole) or microstrip antenna. However when i tested other forms of antennas, the communication range drops to about 0.3-0.6 meters.
Did any one have any ideas of building tiny antenna for 433 mhz applications? Any ideas is favorable.
Wanchope