There is a similar question to mine already asked, but it does not address completely what I want to know, so I am going to create a new question.
I am using long-range RF69 900MHz radios in an Arduino project of mine. I'm trying to keep this as low cost as possible. I have noticed that high-gain SMA antennas are quite expensive (about $5) as compared to just regular wire. It makes sense that I would want something specialized to transmit data. My question is if I need such an expensive antenna for receiving, or if a few centimeters of regular wire will be roughly equivalent.
The data sheet for my RFM69HCW radio specifies that with line-of-sight communications and fancy SMA antennas a theoretical range of 3 or more miles is possible. If I only utilized a 900MHz SMA antenna for the transmitter, kept the transmission strength up at around 20db, and used just a wire antenna for the receiver could I still get this range? Or is the SMA antenna just fundamentally better at receiving these radio waves as well. Thanks!