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    How to design mutisection directional coupler?

    I want to know if someone have any document or software to design muti-section firectional coupler? I use tunneling diode to detect RF power. Second, I had designed log amplifer to transform RF power to DC voltage. What's differents between Directional detector and log amplier? I mean they...
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    Using RF switch as DC switch

    I used RF switch (SP3T) as DC switch. When I increase the input voltage from 0V to 2.4V, the out level will follow that. But the input increase higher than 2.4V to 5V, the output level will be hold in 2.4V. Someone can help me explan that? thx.
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    How t odesign broadband phase equalizer 500MHz to 1GHz

    Is it possible to design that or can you tell me how to design phase equalizer. thanks.
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    How to design an ultra-low noise LNA?

    Ultra-low noise LNA? Could you give me some advices about designing ultra-low noise LNA? The range of the frequency is 1-3GHz and the NF is under 0.5 in room temperature. what's the better transistor for these targets? I try to use feedback model but oscilliation can't avoid. my transistors are...
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    how to generater differential TTL singal?

    differential ttl I want to generater D-TTL to control system. How can I do? First, using TTL to D-TTL IC? which one is better? Second, try to write Labview program to control voltage generater? Can you give me a advice?
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    Do you have any advice about designing suspended filter?

    Someone can give me advices on designing suspended microstrip line filter especially in the mechnical part. I need some references. Thx for your help.
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    How to transfer TTL to differential TTL?

    TTL to Diffential TTL Someone show me the one that I can transfer TTL singal to Diffential TTL.
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    Design LNA in ADS and cadence

    Hi,I try to design Ka band LNA in ADS and using cadence to drew layout. Have you have any idea about connecting these two software?
  9. T

    Noise Temperature and Noise Fighure

    Can you tell me what's the different from them? I had read some materials in Pozar. But I am curious about how the measure the Noise Temperature directly.
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    How to reduce the "In-band noise"?

    Obverously, we can reduce the out band noise by adding band pass filter, especially we can use the elecllent filter like hight temperature superconductor filter. But how can we improve the the signal in the pass band by reduce the noise in the pass band? First, can you tell me nore information...
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    Why LNA failed after being put into liquid nitrogen?

    LNA's Problem! I try to put it in the liquid nitrogen and it fail. Can you tell why?
  12. T

    How to tune microstrip fiter?

    Do you have any idea about it?
  13. T

    Low temperature microwave devices

    Is there anyone designing microwave devices in the low temperature system(77K)? I think the package or the trnsistors will be a problems. Can you help me to get some information about that ? Especially, like FET or others' perforence in the low temperature system. THX. hao.jung@msa.hinet.net
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    The future of filters (HTS filters, LTCC, Advanced-MIC)

    Trends of the filter? Hi, everyone. I am curious about the furture of the filter ( Microstrip line filter). Do you have any idea about that? My job is designing high temperature superconductor (HTS) filter, but i think the price is the problem to using. So, what's your opinion on the forture...
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    Is there anyone designing microstrip line filter?

    Do you have any idea of how to make transmission zero? I reallize the best way is using CQ filter to make TZ, but in papers, most authors list the useless equations to realize correct filter pattern. Is there anyone have experiences in it? Please share me that. Thanks ps. Have you ever hear...
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    Is there anyone designing Microstrip line filter??

    Do you have any idea of how to make transmission zero? I reallize the best way is using CQ filter to make TZ, but in papers, most authors list the useless equations to realize correct filter pattern. Is there anyone have experiences in it? Please share me that. Thanks.

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