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Electronics => RF, Microwave, Ham Radio => Topic started by: Danesh_SA on February 22, 2017, 05:37:31 pm

Title: increase ISM band transmitter and receiver range
Post by: Danesh_SA on February 22, 2017, 05:37:31 pm

Hello ,
I need to have data link range about 500m indoor (there are many walls and building between transmitter and receiver). the receiver has spring antenna and transmitter has cheap chinese 434 mhz antenna.
the result was not bad but i need more coverage .
i teardown afew reciever devices and i found this circuit antenna block works good (i connect the output of saw filter to receiver ANT pin), it has saw filter after antenna BUT what is the blue component after antenna(RTC1)?
2-how can i implement this antenna on my reciever , wich components are important(saw filter,blue component,inductor...)?
3-how can i improve the transmitter range , which antenna should i use?(frequency = 433 MHz)