Last sentence of the description on the first page: "in the 450 MHz to 10 GHz frequency range". I personally never heard of such a concept as minimum frequency, but I had some trouble with an up-converting mixer simulation and had a mini heart attack that my IF frequency is too low for it to work. But if you guys haven't heard of anything like this, then I trouble-shoot elsewhere.
The Minimum Frequency term comes from Noise Figure behavior of the FETs ( or its' variants) due to its nature.The transistors have normally no low frequency limit so they work from DC to Ft but Low frequency Noise of the FETs does not permit them practically to use below certain frequency because of their bad Low Frequency Noise characteristics.
Last sentence of the description on the first page: "in the 450 MHz to 10 GHz frequency range". I personally never heard of such a concept as minimum frequency, but I had some trouble with an up-converting mixer simulation and had a mini heart attack that my IF frequency is too low for it to work. But if you guys haven't heard of anything like this, then I trouble-shoot elsewhere.
just consider also, it's operation DOESNT stop at 10 GHZ .... it probably ( look at the graphs in the datasheet) operate to maybe 15 GHz
but once again, its performance will be down on its designed bandwidth
all transistors have MUCH higher gain as you go to low frequency. Like a 2 GHz transistor with 12 dB gain, might have 35 dB gain at 2 MHz. But that does not stop you from using said transistor at 2 MHz, you just have to be careful you are not making an oscillator out of it.