RF receiver design concept

[robismyname]

rf receiver design saw filter

Im considering using a analog devices mixer (adl5350) in a RX design. I believe its either a single balanced or unbalanaced mixer (not sure). Im certain its not double balanced.

My LO freq range going into the Mixer LO port is: 2260MHz - 2343MHz

My IF freq coming out of the MIxer IF port is: 140 MHz

I am using a 140MHz IF Saw FIlter with BW of 1MHz

If this mixer is unbalanced will any of the harmonics/spurs show up within the passband of the 140MHz IF SAW Filter?

If this mixer is single balanced will any of the harmonics/spurs show up within the passband of the 140MHz IF SAW Filter?

Would it help the design any if I place an attenuator in front of the mixer? (see attachment)

 

[vfone]

concept of a rf receiver

An attenuator placed to the input of the mixer will improve IIP3 of the system, but will decrease Noise Figure.
Use the freeware program AppCad for system analysis:
http://www.hp.woodshot.com/

 

[robismyname]

rf receiver design google

Use the freeware program AppCad for system analysis:
http://www.hp.woodshot.com/

Thanks! What about a "freeware" program for analyzing mixer spurios products?

 

[vfone]

freeware rf reciever software

https://101science.com/RFSim99.exe

 

[robismyname]

http://101science.com/RFSim99.exe

I have a RF input range of 2400MHz - 2483Mhz

I have a LO input range of 2260MHz - 2343Mhz

I have a ouput of 140MHz

WHat do I place into the Variable Frequency section?

What do I place into the Fixed Frequency Section?

What is the significance of the order box?