Has anyone used the ADL5365-EVALZ as an IF-to-RF upconverter?
I am interseted in knowing about the image suppression I can expect for a 70 MHz IF to 2.3 GHz RF conversion
ADL5365 is a doubly balanced passive mixer which does not provide sideband rejection. LO+IF and LO-IF should be quite similar in power level. If sideband rejection is needed, an IQ mixer is recommended for that. IQ mixer can select either sideband of output tones depending on how to connect the external 90 degree hybrid at output port. Here is the link for parametric search of IQ mixer:
Selection Table for I/Q Upconverters/Transmitters | Parametric Search | Analog Devices
Image suppression is a concept when talking about downconverter. There is no such specification for upconverter.
Thank you for your reply. Maybe I was not accurate when formulating my question.
When using a mixer as up-converter, the (+/-1,1) products will convert the IF input signal to LO-IF and LO+IF. Being IF low, these products are too close to be efficiently separated by filtering. The same happens with the feed-through LO, represented by the (0,1) product in mixer conversion charts.
The ADL5365 datasheet does not give information about the rejection characteristics of the (-1,1) product with respect to (1,1). Shall I assume that both are produced with the same level?
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