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David, you are right. At the beginning, I designed them seperately. When combining them together, I thought about adding two λ/4 lines, but the additional lines are pretty area consuming. Then I found out that a complementary diplexer can overcome the disadvantage. The LP and HP filters can work...
After the failure, now I know that I should design the two filters together. So now I leave what I did and redesign it. But how can i make the LP and HP filter complementary to each other? I used the same LP prototype and made the two filters have the same cutoff frequency. But when combined...
I am trying to design a complementary diplexer using LP and HP filters combined parallelly. I have achieved LP and HP seperately according to the basic filter design knowledge. But when I combine them together, the characteristics I have achieved for each filters become unacceptable. I tried to...
diplexer ads
I am trying to design a complementary diplexer using LP and HP filters combined parallelly. I have achieved LP and HP seperately according to the basic filter design knowledge. But when I combine them together, the characteristics I have achieved for each filters become...
balum function
I can give you the paper from the IEEE which I am puzzled about. If I post it here, it's charged and I don't know how to set it free. So maybe I can send it to you by email. OK? Mine is ye_zhongh@yahoo.com.
balun dc feed
I know a balun is a three-port device, one unbalance input and two balance output. The two balance outputs have the same magnitude of signal with 180 degree phase difference. But I find that there exist DC feed in some balun products. I don't know what they are used for. Who can...
marchand balun
According to a paper on IEEE, "LTCC Full-Matching Marchand Balun", as a three-port lossless network, the conventional Marchand baluns can not be matched simultaneously at all ports. And in the paper, the full-matching balun is proposed and fabricated. the circuit is in the table...
can you recommend me some books or papers introducing balun basicly? Maybe I am still not very clear about the concepts of balun.
And still the same question: according to your circuit, if I want to take a look at the phase difference between the two balanced outputs, how can I make it?
Thank...
Thank you for help
But still I have some questions about your circuit. Balun has three ports, but you just put two ports in the circuit, why? And the value of term2 is 100ohm, why? If I want to have a look at the phase difference between the two outputs, how can I make it?
I am trying to design a bluetooth balun. I tried to achieve it in ADS. But I can't make the s-parameter right. I used the tuning tool in ADS. I changed all the variables, and I found that the input return loss and the output return loss conflicted with each other. According to the Marchand...
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