yolande_yj
Full Member level 3
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When an LNA or Mixer is simulated or tested individually, matching networks for input and output are needed.
**broken link removed**
In a single chip RF receiver front end (such as Low-IF or Zero-IF), LNA output signal is coupled directly into the Mixer RF input port:
**broken link removed**
In the normal design procedure, LNA and Mixer are firstly designed (simulated) separately, and then combined together later. Basically the LNA output port and Mixer RF input port do not match. They are not necessary to be match since, inside the IC, the connection between them is so short that it can be neglected comparing with the wave length of the desired RF signal (100mm for 3GHz).
My question is:
When ADS simulates, does it use different mechanism to handle the “Term” component (Terminal) and a normal circuit? Otherwise there will be a significant signal loss due to the unmatched ports of LNA output and Mixer RF input.
If yes, what kinds of mechanism are they?
If no, how does ADS handle that?
**broken link removed**
In a single chip RF receiver front end (such as Low-IF or Zero-IF), LNA output signal is coupled directly into the Mixer RF input port:
**broken link removed**
In the normal design procedure, LNA and Mixer are firstly designed (simulated) separately, and then combined together later. Basically the LNA output port and Mixer RF input port do not match. They are not necessary to be match since, inside the IC, the connection between them is so short that it can be neglected comparing with the wave length of the desired RF signal (100mm for 3GHz).
My question is:
When ADS simulates, does it use different mechanism to handle the “Term” component (Terminal) and a normal circuit? Otherwise there will be a significant signal loss due to the unmatched ports of LNA output and Mixer RF input.
If yes, what kinds of mechanism are they?
If no, how does ADS handle that?
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