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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...
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.
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...
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?
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...
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.
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...
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...
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.