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Recent content by alex123

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    HELP !!!!!!!!!!!!!!!about the windowing technic

    thanks , all. i still cann't understand. 1. how to measure the magnitude from that gragh 2. how to measure the freq of the primary and secondary signal? from the x- axis of picture, i got 6 freq approx 30 khz,50-70 khz, 170 ,280 ,380 ,500 are these freq = primary' fundamental, secondary's...
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    HELP !!!!!!!!!!!!!!!about the windowing technic

    HI ,every 1: a two component signal consists a primary sinusoid of large amplitude and a secondary periodic nonsinusoid of much smaller amplitude.say use a Chebyshev window, how to estimate the MAG of the fundamental and harmonic Freq of the Second signal,reffered to the Mag of the Primary...
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    a question about microwave antenna

    why small microwave dish antenna mya have tapered Amplitude distributions while 30m dishes do not?
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    who has the LMS based adaptive line enhancer matlab code,ccs

    ale matlab i have a project about ALE, help me ,thanks
  5. A

    how to design a LNA (10-12Ghz)

    hi,abdoeng, i also uploaded the picture, and could u plz upload your sch and data sheet? thank u
  6. A

    how to design a LNA (10-12Ghz)

    thank you, i have uploaded the schematic and data sheet in this topic.
  7. A

    how to design a LNA (10-12Ghz)

    yes, i know, but my problem is how to increase the performance within the bandwidth
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    how to design a LNA (10-12Ghz)

    hi, this is my design , it includes the pictures and .ds,dsn files ( my version is 2003c,if you can not open it, see the pictures)
  9. A

    how to design a LNA (10-12Ghz)

    abdoeng. i got s11=-13db, s22=-34dB ,gain=13.6db at center frequency(11Ghz), but i want to get s11<-10 db, s22<-15db, gain >12.5 db between 10Ghz-12Ghz, what should i do? cause at 10gHz and 12Ghz ,my s11,s22 and gain are so pool, help me ,thanks
  10. A

    some questions about LNA design within (10-12GHz)

    hi all, my requirement is to use the HP ATF-36077 between 10Ghz-12Ghz Gain > 12.5 dB Noise Figure = 0.6 dB ± 0.1 dB Input return loss > 10 dB Output return loss > 15 dB firstly, the stability-factor<1 ,so i added a resistance=6 ohm in series, at output port ,then k>1 , and i designed the...
  11. A

    how to design a LNA (10-12Ghz)

    hi,abdoeng what's your frequency? my requirement is 10-12Ghz, and how to design the matching circuit? i mean how to find out the Γinput and Γoutput? i plotted the noise circle(@0.6 db,11Ghz) and gain circle (@13db,11Ghz),find out the Γsource then i use...
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    how to design a LNA (10-12Ghz)

    thanks all, i have simulated the amplifier 10Ghz -12GHz transistor ATF-36077 (HP) requirement: Gain > 12.5 dB Noise Figure = 0.6 dB ± 0.1 dB Input return loss > 10 dB Output return loss > 15 dB the result are: k-factor <1 .so i added a resistance at output in series, then the k-factor >1...
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    how to design a LNA (10-12Ghz)

    ne3210s1 transistor ATF-36077 (HP) design 11GHZ LNA Gain > 12.5 dB Noise Figure = 0.6 dB ± 0.1 dB Input return loss > 10 dB Output return loss > 15 dB i have some questions: 1.design information, Noise Figure, Noise Circles, Available Gain, Output Match, etc. can be find with ADS simulation...
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