WebAug 11, 2024 · One would assume that the return loss of a 20dB attenuator in cascade with a 50 Ohm termination connected to an oscilloscope with an input impedance made up of 1MOhm resistance in parallel with 16.5pf would be 40dB better than with the termination alone. The OP seems to get a best figure of around 40dB. WebTXtelsig VCO features: 1. High integration and standard package size; 2. Arcade structure of two-stage transistor, small working current, high output power and good isolation; 3. Use high stability oscillating circuit structure, high precision varactor and high output power RF triode to ensure stable starting waveform and high output power. 4 ...
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WebApr 26, 2007 · Hi, zahriladha. I think in HFSS, if you are using Driven Modal and Waveport, the HFSS will calculate the intrinsic impedance of your port (not necessary 50 Ohm) and use that as the terminal impedance for your S-parameter. However, you can renormalize your port impedance to 50 Ohm in the waveport options. If you are also considering higher … Web50嵐內惟店, Kaohsiung, Taiwan. 469 likes · 2 talking about this. 歡迎光臨~50嵐內惟店! 我們用最熱情和熱誠的心為您服務 泡製安心又好喝 WebThe standardization of fifty ohm impedance goes back to developing coax cables for kilowatt radio transmitters in the 1930s. A good explanation for the choice of fifty ohms is given in Microwave Tubes, by A. S. Gilmour, Jr. The quick answer is that 50 ohms is a great compromise between power handling and low loss, for air-dielectric coax. createdecipheriv encrypt decrypt