Just letting you know an app note on the TRF370417 IQ modulator was released. It discusses how to improve the OIP3 at LO frequencies > 4.5GHz.
Here is the link to the app note: http://www.ti.com/general/docs/lit/getliterature.tsp?literatureNumber=slaa532&fileType=pdf
It can also be found in the TRF370417 product foler: http://www.ti.com/product/trf370417
Title: TRF370417: Optimizing OIP3 Performance at Local Oscillator (LO) Frequencies Beyond 4.5 GHz
Abstract: The TRF370417 is an industry-leading IQ modulator in terms of noise floor and OIP3 performance across a 50-MHz to 6-GHz local oscillator (LO) frequency range. At LO frequencies beyond 4.5 GHz, the OIP3 performance sensitivity increases with changes in supply voltage, temperature, common mode voltage (Vcm), process variation, and baseband input amplitude. This application note investigates the trends seen in OIP3 variation with respect to these sensitivities. In addition, recommendations are made for calibrating the TRF370417 for optimal OIP3 performance at LO frequencies beyond 4.5 GHz
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