BigBoss
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Yesterday, 20:54Have you ever drawn Load and Source Stability Circles for the bands which are root cause of instability ?? There may be a small portion/extreme...2 replies | 111 view(s)
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21st September 2019, 21:10Does Touchstone s-parameters file include Noise Information ?? ( NFmin,Rn,OptsGamma etc) Have you ticked Noise Simulation box in s-parameter control...1 replies | 124 view(s)
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21st September 2019, 21:06Because the Tables are not corresponding each other..One shows Equal Ripple type Filter while the other is showing Butterworth Approximations.. They...2 replies | 127 view(s)
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21st September 2019, 17:29BigBoss replied to a thread Rplpoly layout matching problem in Analog Integrated Circuit (IC) Design, Layout and FabricationIf it's applicable - You can adjust the physical W/L dimensions in order to match the resistor for different values.4 replies | 221 view(s)
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21st September 2019, 04:17BigBoss replied to a thread Can you help me get S-parameter file of Mitsubishi MGF4937AM and Infineon CFY67 in RF, Microwave, Antennas and OpticsIf s-parameters are not published, you can request from Mitsubishi if the project is serious. But Mitsubishi gave s-parameters for Minimum Noise...6 replies | 290 view(s)
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20th September 2019, 19:21I would like to give you a good reference to understand discrete transistor design fundamentals. It's not complete but will give you a bright...5 replies | 261 view(s)
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20th September 2019, 05:15BigBoss replied to a thread Can you help me get S-parameter file of Mitsubishi MGF4937AM and Infineon CFY67 in RF, Microwave, Antennas and Opticshttp://www.mitsubishielectric.com/semiconductors/php/eTypeNoProfile.php?TYPENO=MGF4937AM&FOLDER=/product/highfrequency/gaas/lownoise...6 replies | 290 view(s)
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19th September 2019, 19:35BigBoss replied to a thread How to check different temperature values for design of LNA IN ADS. in RF, Microwave, Antennas and OpticsFor Temperature, you have to place "Options" block and temp variable can be set in it.. In order to sweep any biasing value, you should use...1 replies | 165 view(s)
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18th September 2019, 18:29The results are wrong..1/2 Power Divider must have at least -3dB Insertion Loss..13 replies | 419 view(s)
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17th September 2019, 14:07Ports are not excited simultaneously by definition of s-parameters.The simulator does not do too.. If this structure is a "Planar Wilkinson Power...13 replies | 419 view(s)
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17th September 2019, 05:59Combiners/Dividers are passive elements so they have losses, not gain.. How did you simulate his combiner?? Which EM simulator have you used ?? What...13 replies | 419 view(s)
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15th September 2019, 22:08This is not a Balun, it's a transformer with tapped pins.It can be used as a Balun of course but tapped pins are not necessary if you don't drive an...3 replies | 282 view(s)
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15th September 2019, 18:23But they are physically connected, you wanna separate the nets ?? I don't think so that is possible..3 replies | 282 view(s)
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15th September 2019, 18:20BigBoss replied to a thread Is there possibility to force a filter topology in DA_LClowpassMatch in ADS? in RF, Microwave, Antennas and OpticsYou cannot match over this bandwidth with simple few matching circuit.Load Impedance is not constant and varies by frequency.. Is your intention to...24 replies | 772 view(s)
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14th September 2019, 19:12BigBoss replied to a thread How can i design defected ground structure in AWR ? in Electromagnetic Design and SimulationArrange the layers and associated materials and other stuffs in "Enclosure" box and make the "Bottom Boundry" being as Open. Then connect the Ports...3 replies | 300 view(s)
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13th September 2019, 16:17BigBoss replied to a thread Is there possibility to force a filter topology in DA_LClowpassMatch in ADS? in RF, Microwave, Antennas and OpticsAppend to volker.. Choose the Filter's Input Output Real Impedances carefully regarding to those impedances to be matched. Choose appropriate...24 replies | 772 view(s)
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11th September 2019, 19:34BigBoss replied to a thread 1dB compression point and jamming signals in RF, Microwave, Antennas and OpticsJamming sensitivity is not depended on P1dB Compression Point only ..Non-linearity ( in general speaking ) is figure of merit of an LNA but "the...3 replies | 342 view(s)
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11th September 2019, 19:28BigBoss replied to a thread Is there possibility to force a filter topology in DA_LClowpassMatch in ADS? in RF, Microwave, Antennas and OpticsThere is no such definition as Matching Frequency in Filters.. Because Filters are not matching circuits. OK, If Input and Output Impedances are...24 replies | 772 view(s)
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11th September 2019, 05:07BigBoss replied to a thread (ADS) There are no components in ADS after importing my PCB layout from Altium in Software Problems, Hints and ReviewsODBC++ is not a proper way-especially from Altium- to import into ADS.Use simply Gerber format.. no pain..4 replies | 238 view(s)
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8th September 2019, 20:13I believe that the frequency is too low to couple two layers that are layed down on two different layers.So efficiency of a such transformer will be...6 replies | 343 view(s)
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8th September 2019, 19:57BigBoss replied to a thread [SOLVED] Questions about the definition of Z-matrix and Zin and Zout in Software Problems, Hints and ReviewsYou confuse z-parameters and Input/Output Impedances of a 2-port. z-parameters are "open circuit parameters" and z11 is not equal to Zin ( or z22 is...1 replies | 426 view(s)
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7th September 2019, 10:04So you should check the Load is connected well then you will turn on the PA, is that right ?? If it's so, I would use a switch to check the Load is...4 replies | 295 view(s)
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6th September 2019, 17:37But if the load is disconnected the PA will also be burned due to reflected waves from Open Circuit.. Take this account into..( I presume the PA has...4 replies | 295 view(s)
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6th September 2019, 17:28BigBoss replied to a thread Parameters S12 Reverse transmission coefficient in RF, Microwave, Antennas and OpticsImagine an amplifier..It has one input and one output port right ?? If you apply a signal to input port, you achieve amplified signal at the output....6 replies | 374 view(s)
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6th September 2019, 17:23BigBoss replied to a thread Is there possibility to force a filter topology in DA_LClowpassMatch in ADS? in RF, Microwave, Antennas and OpticsFilters have only cut-off frequency definition,that's it..The Input/Output Impedances are constant( already defined ) along filter specification...24 replies | 772 view(s)
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6th September 2019, 17:20Parallel resistors are used at input/output or both..Consider also highpass/lowpass filter combination. There are numerous solution for the...3 replies | 234 view(s)
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6th September 2019, 10:19The amplifier may oscillate-not definitely but-.If K<1, the amplifier is conditionally stable so certain load and source impedances may drift it into...3 replies | 234 view(s)
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6th September 2019, 00:07BigBoss replied to a thread Spacing Between PCB Pad and HEATSINK in PCB Routing Schematic Layout software and SimulationIn order to prevent from electrical arcs , I'd recommend yo to use a adhesive insulator between heat-sink and capacitor pads.3 replies | 413 view(s)
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6th September 2019, 00:03BigBoss replied to a thread Parameters S12 Reverse transmission coefficient in RF, Microwave, Antennas and Optics"Quadripole" means 2-Ports right ?? So, since the antenna has one port only, there won't be S12 or S21 etc.It will have S11 only and the quality of...6 replies | 374 view(s)
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5th September 2019, 18:45BigBoss replied to a thread Is there possibility to force a filter topology in DA_LClowpassMatch in ADS? in RF, Microwave, Antennas and OpticsADS Filter Design Guide does not accept complex load or source impedances. Therefore you should use a closer real impedance-for instance 10 Ohm-then...24 replies | 772 view(s)
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