Transmitter and Receiver sharing antenna, 433MHz

[fredrik.jacobsson]

Hi,

I'm designing a pcb with both transmitter and receiver for 433MHz and I would like to use only one antenna for both. The transmitter and receiver are ASK and I do not need to send and receive simultaneously, the transmitter is ~10mW.
How do I design a switching/combining circuit?

// Fredrik

 

[sanjubluerock3]

please give more info.... schematic......etc...

 

[kspalla]

You can use simple circuit.
Use SPDT to switch between Tx and RX.
i.e common poet connecting to 433Mhz antenna, one end to Tx and the other to RX.

 

[fredrik.jacobsson]

I would like not to use a relay, maybe something like this; **broken link removed**, but intgrated on my own pcb... any ideas what's on the abacom module?

 

[volker_muehlhaus]

Here are some electronic SPDT switches:
http://www.datasheetdir.com/RF-Switches

You could also build your own switch with PIN diodes.

 

[sanjubluerock3]

the link u have given is


The resource you are looking for might have been removed, had its name changed, or is temporarily unavailable.

 

[FvM]

GaAs MESFET are state-of-the-art for Rx/Tx switches, e.g. RFMD RF2436
https://www.rfmd.com/CS/Documents/2436DS.pdf

 

[LNA]

HMC546LP2 from Hittite. Good for TDD system.

 

[Salman87]

hi i want to control rc helicopter through laptop as well as video transmission over it so i need a FR transceiver
capable of trans/receiving video data as well as controlling the helicopter atleast of 1km range . . kindly help me out which transceiver i use . . .