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hi, when I simulate a passive device in ADS using HB simulation and small-signal s-parameter separately to obtain the gain from Port1 to Port2 and found that the results are not the same. P_probe is used to calculate the output power and S(2,1) represents the small-signal s-parameter. Could...
hi all, we all know that there are many modes in a waveguide and each mode has its cutoff frequency above which it begins to propagate. in HFSS simulation, I try to simulate the gamma(\[ \gamma \]) for each mode. this is the waveguide measures axb=4.7mmx2.4mm. the cutoff frequency of TE21 mode...
Yes, BigBoss. It is a fundamental mixer and I want to verify that whether the 2nd harmonic of the LO signal affect the mixing. the simulation setup is shown is the figure and LOfreq2=2*LOfreq. the simulation results shows that besides the most strong signal created by LOfreq, there are also some...
hi, all. in ads (keysight) simulation of one mixer, there is a warning"more than one mixing item has landed on xHz". Does it mean there is shared frequency jamming or something shared frequency interference? Or Could it be explained that more mixing item on one frequency is good because the...
hi, all. It takes a long time to simulate one HFSS project when it comes to a complex model. I wonder are there some ways to estimate the simulation time in advance. I just found the mesh data in the simulation result and uploaded here. Any useful information in this picture? thanks for any idea.
thanks for your reply, BigBoss. Yes, I'm also amazed when I see tripler using source and load-pull. Before that, I only use HB simulation and match the diode pair aiming to get better input/output return loss and conversion loss. here is the paper link: https://www.mdpi.com/2079-9292/9/8/1201
hello, I read a paper saying that the harmonic impedance of diode could be simulated by load-pull in ADS. Does anyone know how to simulate? I checked the simulation template in ads and found no such load-pull simulation for diodes. Actually, I want to design one frequency tripler and study the...
hello everyone, long time no see. recently, I want to simulate the microstrip in my design. there are many harmonics in the circuit and I only want to study the effect of microstrip on 1*fo, not 2*fo and 3*fo. that is to say, for 1*fo, the 'microstrip' act as microstrip. but for 2*fo and 3*fo...
hi,all
recently i read some papers about mmic pa. the result is that siicon based mmic(like CMOS and SiGe) often use differential structure like balun in PA design but GaAs and GaN PA never use differential structure. why? thanks for your sharing
hello dear,
in PA design, load and source pull can be used to assess the transistor's outpower and efficiency. I'm curious are there any good ways to assess the conversion loss of diode in its mixer and frequency multiplier design. thanks for sharing your idea~
hi, BigBoss, very happy to see your reply. I'm simulating diode ring mixer and its schematic is shown below and i want to design a matching network between LO balun and diode. so i use the above set-up to simulate the input impedance of diode. you mentioned remarkable power/voltage should be...
hello all, recently i'm simulating the diode ring mixer. the "on" and "off" state is often used to analyze the mixer. I'm curious how to judge the on and off state of the diode, then i simulate them in ads, and compare the power of the ends of the diode. But something strange happened. usually...
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