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95 Threads found on edaboard.com: Impedance Matching And Between
hi everybody! i want to know how i can make the passive impedance matching of a monopole antenne between 50 MHz and 500 MHz thanks for replies
* To get best reception at a certain frequency, try to make L value variable (example, like the tunable inductors inside radio receivers.) * To do impedance matching between sections, a general rule is to base the L value on available current. Low A, low C, high L. High A, high C, low L.
Hi all, Please, How can I use Lumped element on a port for impedance matching purpose between a discrete port and dipole antenna in CST? How can I connected the Lumped element, discrete port and antenna together ? what I use to connected them?
I need to match two impedance, for example, one is 5 ohm, and the other is 100 ohm. How can I use the idea_balun or xfmr in cadence analog lib to realize the impedance matching between the two resistors. Thanks.
Hi friends! I am designing a matching network between Known source impedance(50ohm) and known load impedance(2Mega ohm). I want to know how to find the values of Inductor and capacitor. If anyones kindly share your knowledge.
Hi friends! I am designing a matching network between Known source impedance(50ohm) and known load impedance(2Mega ohm). I want to know how to find the values of Inductor and capacitor. If anyones kindly share your knowledge.
Hello, I have an UWB antenna that is composed of double sided substrate. I noticed that when i round the lower vertices of the upper side (patch) or the upper vertices of the lower side (ground) the matching improves, i reviewed the imaginary and real part of the input impedance and i found that they do get improve as (...)
If point B is 50 ohms (as should be) you can connect directly to that point a 50 ohms dummy load, and keep the PI network for impedance matching between PA transistor and the load.
If the two stages are close one to the other and not use 50 ohms transmission lines between them, you do not need to go to 50 ohms. Just use a matching network to match the output impedance of the first stage to the input impedance of the second stage. Designing the matching network have to (...)
you do not tell us how long the interconnecting transmission line is, nor how much amplitude ripple you can live with over a bandwidth. If they are really close, just hook one to the other. If they are far apart, you could add a series resistor at the mixer, and run 75 ohm line. if it is narrowband, you could just run 50 ohm line (...)
Hello Ali & Hocine Most probably the matching between chip and tag input impedance... Anyway, if you would like to check your .cst file, please share it with me in order to validate it. Thank you
Yes, don't even think to get good performances for this wideband matching circuit without using the "optimize" option of an RF simulator. Because the maximum frequency is relative high, very important is how to set all the parasitics in the optimization process. In this broadband match circuit the main goal is related to a huge (...)
So You don't have any matching circuit between filter and output stage. A filter can easily be designed for 50:50 impedances but you loose power because of this mismatch at this level of power.. The designer has to know output impedance of the final stage, otherwise it won't work..
Thanks. With my spectrum analyzer I have tracked many peaks and valleys from 26 Ω to 88 Ω along the receiving span, measuring every 10MHz; but larger/lower readings may be hiding in between samples. matching 75Ω over the full bandwidth does not make much sense. impedance is tied to a (...)
In order to optimize s-parameters on filters used in front-end input and output, impedance transformer line matching is necessary. Many resources exist on strip design.
For very high frequency 2 stage LNA, we also need to match the interstage impedance. I know for input output matching,we can add 50 ohm port to let input and output to matching to 50ohm. While for the interstage, how do I match the interstage, I can't add a port between the output of the 1st stage (...)
For proper differential application,balun in needed between your loop antenna and transmitter,of course the balun may be deleted only when your transmitter has diff.outputs. The SMD balun is good choice in our band, impedance matching may be needed.
I suppose there's no pure L matching network solution for the given impedances. Do you mean LC matching network?
Irrespective of HFSS, I leave the port impedance on 50 Ohm and use post processing to calculate the reflection coefficient between the chip and the antenna according the formula you have mentioned. When using a renormalization to a complex impedance, some programs have a different behaviour thus I avoid (...)
what is the meaning of "balun"? BALUN = BALanced to UNbalanced used for impedance matching and matching between balanced feedlines and unbalanced feedlines/antennas and between unbalanced feedlines eg. coax to balanced antennas eg dipoles Dave - - - (...)