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    Closed: Re: Want to download CST and HFSS software

    You can request CST Microwave Design Studio Student Version from www.cst.com.
    Also, Antenna Magus may be available for your purpose..
  2. Closed: Re: How to reduce Harmonic Balance simulation time in Spectre

    Oversample Factor is too much that's why your simulation is so slow..
    Since the waveform does not have extreme shape ( ringing,overshoot,hardly squared etc. ) you don't have to increase Oversample...
  3. Closed: Re: what is the significance of the transit frequency and maximum frequency of oscill

    fT : The Frequency where the Short Circuited Current Gain drops to Unity of Active Device ( BJT or MOS etc.)
    fmax: Maximum Available oscillation Frequency that is defined by Intrinsic Elements of...
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    Closed: Re: pins of symbol and layout do not match

    Is that PDK complete ?? It ought to be..Otherwise there is no sense to use it.
    You cannot make them a pair ( schematic and layout views ) if there is not a corresponding.Either there is an...
  5. Closed: Re: what happens to RF choke while doing ac analysis

    -Self Resonance Frequency is the functional limit of the RFC so that RFC cannot be used beyond SFR due to changing behavior of its nature.( beyond SFR, the RFC is not Inductor anymore, instead it's a...
  6. Closed: Re: what happens to RF choke while doing ac analysis

    RF Choke will act as Open Circuit for AC Signals and Av=-gm*rds will be as you have remarked ( Open Circuit Voltage Gain ). Another advantage of using RFC is that'll give you more Voltage Headroom...
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    Closed: Re: modeling schottky diodes on ADS

    Are you sure ??
    154324154325
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    Closed: Re: pins of symbol and layout do not match

    Why don't you use directly Layout-XL-->Update ?? What is Binding for ?
  9. Closed: Re: The relation among power, bandwidth and harmonics

    There is no relationship between Bandwidth and Harmonics.
    Harmonics are produced by Non-linear Transfer Function of the Active Devices and they are mathematically related to this function.
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    Closed: Re: Layout problem when trying to see layers

    Increase Stop level..
  11. Closed: Re: [ADS]method to establish correlation between LNA EM simulation and circuit simula

    You will solve these kind of problems by experimental methods.I cannot tell you now how a good RF layout is done here because learning layout tricks and hints takes so long time and you have to...
  12. Closed: Re: [ADS]method to establish correlation between LNA EM simulation and circuit simula

    No, it's unrelated..
    For instance, let's imagine a TL and L-C combined matching circuit.. And you're not sure the exact position of the Capacitor.So, you place optional ports for it then while doing...
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    Closed: Re: Suggestion to design a matching network

    An analytical method may be found but it's so hard..
  14. Closed: Re: Is it feasible to manually draw from scratch a 2-layer PCB inside HFSS

    Standard PCB packages such as Altium, Kicad etc. cannot draw this type of precise Microwave layouts.
    I would draw this layout in AutoCAD ( or similar CAD program) then import into HFSS as a DXF.
  15. Closed: Re: [ADS]method to establish correlation between LNA EM simulation and circuit simula

    The method is to optimize component values over layout that has already been simulated and characterized by s-parameters.
    In order to do this, you should place optional ports ( for instance, a right...
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    Closed: Re: Bi-directional amplifier for Wi-Fi

    There are many 2.4GHz WiFi Fronts Ends here..
    https://www.qorvo.com/products/integrated-products/wifi/wifi-network-equipment
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    Closed: Re: Altium design information

    I think Altium has a Manufacturing Outputs to create such docs in ver. 19.
    https://www.altium.com/altium-designer/playlists/manufacturing-outputs#playlist-main_video_LKGzYpyBEYhqygLStqL5tv
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    Closed: Re: Layout design book recommendation

    There is no such RF Layout Fundamentals..There are some Basic Principles and Rule of Thumbs while designing a RF PCB or MMIC/RFIC Layout.
    Furthermore, PCB and MMIC/RFIC Design Rules are quite...
  19. Closed: Re: HSPICE as simulator in advance design system (ADS) for pole/zero analysis

    ADS Design Environment is not compatible with HSPICE at all..But AWRs MWOFFICE is compatible..
    If you're able to get a chance Cadence Spectre Simulator, you can do your pole-zero simulation in this...
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    Closed: Re: RF Filter Design Book Recommendation

    There are lot of good books on Classical RF Filters including Distributed Ones but SAW and BAW Filters are roughly Technology Dependent on the Manufacturer therefore it's not easy to find a reference...
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    Closed: Re: UHF Amplifier Matching Woes

    My sentence structure was a bit lossy above..
    I meant that, S11 and S22 are both not good enough even for 175 MHz.
    I suggest you to use Simultaneously Conjugate Matching technique at the beginning...
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    Closed: Re: UHF Amplifier Matching Woes

    Transmission Lines are not necessary, you can also use equivalent L-C components instead of them.But the problem is here that you're trying to match an Power Amplifier for a single frequency even for...
  23. Closed: Re: how to eliminate oscilation in current measuring circuit ?

    You're doing something wrong..
    You measure a current and you couple 2 OpAmps on a poor breadboard with components mounted "space technique" .OpAmps are very sensitive components due to their high...
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    Closed: Re: UHF Amplifier Matching Woes

    You're trying to match this BJT with a simple L-C matching circuit but there is a sample app. circuit in its datasheet and they matched this BJT with TL-C pairs.You matching circuit is relatively...
  25. Closed: Re: Any way to make a rounded rectangle non-plated hole in Altium?

    A hint... Place a SMD Square with Rounded Corners then place a Donut on it with a Drill Diameter smaller than Inner Circle ..
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