BigBoss
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Today, 13:06Since the Bandwidth is so large as remarked, there are not so many possibilities to down to -100dBm..If you increase the bandwidth , the MDS will be...11 replies | 228 view(s)
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Today, 01:33BW=29 MHz NF=3.1 MDS=-174+3.1+10*log(BW)=-96.xx dBm.. Bandwidth and NF is pretty high to measure -100dBm signal strength.( I didn't include...11 replies | 228 view(s)
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3rd December 2019, 04:17BigBoss replied to a thread 1~1.5 GHz Waveguide bandpass filter design tool in RF, Microwave, Antennas and Opticshttps://www.mician.com/products/%CE%BCwave-wizard/3 replies | 263 view(s)
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2nd December 2019, 03:40BigBoss replied to a thread 1~1.5 GHz Waveguide bandpass filter design tool in RF, Microwave, Antennas and Optics1-1.5 GHz Frequency Band is too low for Waveguides,As you know well Waveguides have Lower Cut-Off Frequencies.3 replies | 263 view(s)
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2nd December 2019, 03:33Are you sure that you will able to find HSMS2850 Schottky Detector Diodes ?? They are obsolete coming form HP days..6 replies | 264 view(s)
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1st December 2019, 23:27BigBoss replied to a thread Simple 50R I/O RF attenuator (1-30MHz) in RF, Microwave, Antennas and OpticsThis company manufactures some interesting components which you may be interested in.. http://en.yantel-corp.com/pro_show_id_19.html14 replies | 395 view(s)
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30th November 2019, 01:35BigBoss replied to a thread 2.4GHz WiFi module causing interference on 433MHz RF receiver module in RF, Microwave, Antennas and OpticsUsing a SMPS to drive a BT Module is not a good idea unless the PS is very clean.Placing this BT Module around this PSU is an worse idea due to EMI...6 replies | 362 view(s)
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29th November 2019, 14:29BigBoss replied to a thread Building Blocks on an FM Band Receiver in RF, Microwave, Antennas and OpticsA typical BPF should has 1dB ( more or less ) Insertion Loss at those frequencies, not 10dB. This Insertion Loss will surely reduce the Sensitivity...7 replies | 335 view(s)
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29th November 2019, 01:42BigBoss replied to a thread Building Blocks on an FM Band Receiver in RF, Microwave, Antennas and OpticsBefore amplifier, you should use a filter to clean out the unwanted signals such as VHF , Air Traffic, Amateur Band signals. Otherwise the Amplifier...7 replies | 335 view(s)
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26th November 2019, 11:58BigBoss replied to a thread Design of LNA using CMOS transistor in RF, Microwave, Antennas and OpticsThere is no such CMOS Transistor for LNAs.There were some discrete pHEMTs, BJTs once upon a time but all have gone.. Some Infineon BJTs and some...2 replies | 567 view(s)
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21st November 2019, 21:08The answer was there.. When you simulate any kind of circuit in fact you're using a special calculator. nothing more ..And every element has been...4 replies | 377 view(s)
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21st November 2019, 21:01This is true only and only the Resonators are NOT coupled yet ( standalone ), Coupled Resonators will interact each other and Eigen Frequencies will...3 replies | 406 view(s)
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21st November 2019, 09:14BigBoss replied to a thread Help with electromagnetic interference in Class E amplifier in Power ElectronicsClass-E Amplifiers are naturally Switched Mode Amplifiers and they generate lot of harmonics due to its nature. The solely method is to reduce the...2 replies | 199 view(s)
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20th November 2019, 07:52BigBoss replied to a thread [moved] Video transmitter for TV in Hobby Circuits and Small Projects ProblemsYes, you can connect HDMI PC Output to CVBS Input of the TV by using MINI HDMI 2AV adapter. If the TV set hasn't got CVBS Input, you will have to...3 replies | 300 view(s)
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19th November 2019, 09:06gm=derivative(Ids/Vgs)(whilst Vds=constant) Obtain Ids vs Vgs and take the derivative of this curve..7 replies | 393 view(s)
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17th November 2019, 13:55BigBoss replied to a thread Insertion loss reduction for matching networks in PA design in RF, Microwave, Antennas and OpticsIf the Impedance Matching Circuit has been carefully designed, S11,GammaS,GammaL and S22 will all be zero (ideal case) so what rests ?? Just S21....8 replies | 608 view(s)
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17th November 2019, 11:07BigBoss replied to a thread Insertion loss reduction for matching networks in PA design in RF, Microwave, Antennas and OpticsNo.. You're doing a serious mistake.. If there is a Optimum Load Impedance to be matched to 50 Ohm, the Generator Impedance ( call it as Port-1)...8 replies | 608 view(s)
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17th November 2019, 10:10BigBoss replied to a thread Insertion loss reduction for matching networks in PA design in RF, Microwave, Antennas and OpticsBut this Insertion Loss is according to 50/50Ohm Terminations and if you change Optimum Load Impedance with Source Impedance, the Insertion Loss...8 replies | 608 view(s)
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17th November 2019, 01:32BigBoss replied to a thread Insertion loss reduction for matching networks in PA design in RF, Microwave, Antennas and Optics-You presume that the PA has 50 Ohm Optimum Load Impedance right ?? But it's not practically true..Have you ever really found it as 50 Ohm ?? I...8 replies | 608 view(s)
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16th November 2019, 11:21BigBoss replied to a thread Broad band dsign of LNA best topology in RF, Microwave, Antennas and OpticsFollow the Textbook of Thomas Lee..7 replies | 460 view(s)
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16th November 2019, 04:08BigBoss replied to a thread Keysight ADS ground connection in schematic not reflected in layout in RF, Microwave, Antennas and OpticsYou have to use VIAs, no way out.Is there any other possibility to connect a Stub to GND in reality ?? No.. So, VIAs are necessary..In order to...8 replies | 612 view(s)
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16th November 2019, 01:00BigBoss replied to a thread Is it possible to eliminate harmonics when operated in compression in RF, Microwave, Antennas and OpticsYou can filter them out..or you can also apply linearization techniques or you can use more linear device with an appropriate biasing.2 replies | 237 view(s)
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15th November 2019, 12:55BigBoss replied to a thread Broad band dsign of LNA best topology in RF, Microwave, Antennas and OpticsDistributed Microwave Amplifiers are also very popular for wide-band applications.7 replies | 460 view(s)
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15th November 2019, 12:54BigBoss replied to a thread Reflections when conjugately matched in RF, Microwave, Antennas and OpticsResearched in my literature and found very intuitive explanation about Power Waves and Scattering "Microwave Transistor Amplifiers-Analysis and...3 replies | 373 view(s)
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13th November 2019, 19:28BigBoss replied to a thread Broad band dsign of LNA best topology in RF, Microwave, Antennas and OpticsCascode Configuration is most common one.7 replies | 460 view(s)
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13th November 2019, 16:31C(Farad)=1/{2*PI*Imag}5 replies | 414 view(s)
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12th November 2019, 23:15BigBoss replied to a thread Current and degeneration resistor in input pair in Analog Circuit DesignDegeneration Resistors improve the linearity,increase the Input Resistance that's all.. There is no closed form equation for Calculation of...3 replies | 257 view(s)
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12th November 2019, 20:38They can also be used to achieve PTAT Current by well adjusting Resistor and Transistor Multiplication number..3 replies | 270 view(s)
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12th November 2019, 20:31BigBoss replied to a thread [moved] Video transmitter for TV in Hobby Circuits and Small Projects ProblemsTransmitting Digital TV Signal is not easy because it needs a IQ Digital Modulation and obtaining this IQ Digital Video Signal is not easy. On the...3 replies | 300 view(s)
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10th November 2019, 23:49If you know S-Parameters, you can transform them into Z-Parameters by using well known equations.5 replies | 414 view(s)
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