Hello,
I am having difficulties understanding the unwanted frequencies analysis in REALITY and not in theory.
i am aware that whenever you use a mixer, for example RF and LO mixed to get IF, the IF frequencies will ideally be consisted of (f_lo+f_rf) and
(f_lo-f_rf). In my design i am interested only in the (f_lo-f_rf) part.
I am working with hmc1056 from analog devices(Link at the bottom) , and i am wondering if i need to put a low pass filter in the outport IF, in order to get only (f_lo-f_rf). i don't understand why in the data sheet of the component they write that the IF frequency band is DC to 4GHZ, does that mean the if the f_rf = 10 GHz and f_lo=10GHz than in the IF port i will not get the (f_lo+f_rf) = 20GHZ? so should i put a low pass filter or not after all ?
Another question concerning the harmonics in the mixer. Let's assume i can use any quantity of different reflection less filter from the mini circuits X series in order to diminish the harmonics. where would it be useful to put them? in the IF port or also at the RF and LO ports as well ?
http://www.analog.com/en/products/r...ge-reject-mixers/hmc1056.html#product-quality
thanks in advance.
I am having difficulties understanding the unwanted frequencies analysis in REALITY and not in theory.
i am aware that whenever you use a mixer, for example RF and LO mixed to get IF, the IF frequencies will ideally be consisted of (f_lo+f_rf) and
(f_lo-f_rf). In my design i am interested only in the (f_lo-f_rf) part.
I am working with hmc1056 from analog devices(Link at the bottom) , and i am wondering if i need to put a low pass filter in the outport IF, in order to get only (f_lo-f_rf). i don't understand why in the data sheet of the component they write that the IF frequency band is DC to 4GHZ, does that mean the if the f_rf = 10 GHz and f_lo=10GHz than in the IF port i will not get the (f_lo+f_rf) = 20GHZ? so should i put a low pass filter or not after all ?
Another question concerning the harmonics in the mixer. Let's assume i can use any quantity of different reflection less filter from the mini circuits X series in order to diminish the harmonics. where would it be useful to put them? in the IF port or also at the RF and LO ports as well ?
http://www.analog.com/en/products/r...ge-reject-mixers/hmc1056.html#product-quality
thanks in advance.