https://en.wikipedia.org/wiki/Intermediate_frequency

So a high frequency signal is converted to a lower IF for ... as was necessary in the early tuned radio frequency receivers.

http://www.rfwireless-world.com/Terminology/RF-vs-IF.html

https://www.analog.com/media/en/training-seminars/design-handbooks/Basic-Linear-Design/Chapter4.pdf

are the radio frequency (RF) input, the local oscillator (LO) input, and the ... When the sum frequency is used as the IF, the mixer is called an upconverter; when ..... a bandwidth of over 500 MHz. A block diagram is shown in Figure 4.17. +VS. A.

Thus far, we have discussed RF signals in terms of two frequency bands: the baseband ... The abbreviation “IF” refers to an intermediate frequency itself or, more .... IF receivers, and we'll also discuss the heterodyne vs. direct-conversion issue.

https://www.quora.com/What-is-the-difference-between-RF-and-IF-frequency

RF = Radio Frequency (LO + IF) IF = Intermediate Frequency (LO - RF) Relation Between RF and IF : See the figure below. When the IF is ...

https://electronics.stackexchange.com/questions/79901/why-the-conversion-to-intermediate-frequency

So, you might have 60 dB of RF gain then convert to your IF and have 60 dB of IF gain - the signal at the end of the chain is no longer frequency ...

https://www.digikey.com/en/articles/techzone/2011/oct/the-basics-of-mixers

Oct 20, 2011 ... Determine the LO, RF, and IF frequency ranges involved as well as the ... Specifications (with reference to VS = 2.8 V; IS = 6 mA; PLO = 0 dBm; ...