3 GHz to 20 GHz double balanced mixer performs as up- or downconverter
Wideband Balanced Mixer | WR-28 | RF Frequency 26.5 GHz to 40 GHz
1.5--4.5GHz RF Up Down Frequency Conversion Upconversion Downconverter Bandwidth Passive RF Mixer Module Board - AliExpress
moRFeus - RF Upconverter and Downconverter, Wideband Mixer and Signal – Othernet
Up/Down Converter - RTx Technology
5-1900MH RF Up Down Frequency Conversion Upconversion Downconverter Mixer Module | eBay
K6JCA: SDR Notes: The Mixer Mathematics of Digital Down Conversion
Mélangeur de fréquence Large gamme dynamique 5-900Mhz RF Mélangeur de conversion de fréquence haut et bas Récepteurs HF et VHF pour la conversion RF-IF : Amazon.fr: Commerce, Industrie et Science
Down Conversion in RF Receiver - Rahsoft
A Quick Guide to Mixer Topologies - Mini-Circuits Blog
Dual-channel Up-Down Converter - pSemi
Down Converter Mixer as a Multiplier in Receivers | Download Scientific Diagram
Dual Stage Mixer Downconverter - Is This Possible? (Details in Comments) : r/AskElectronics