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191 Threads found on Impedance Matching Network
sure a coupled line quarter wave long should be good for maybe 30% bandwidth. you can also use it to transform impedance if it is part of a matching network
Check the input impedance for case (3) and (4) at the input of the matching network, are they the same? Why you use tml-matching circuits at 900 MHz? Maybe it's space-saving to use discrete components instead. Where are ports 10 & 11? Are the simulation settings (mesh density etc.?) equal for cases (3) and (4)?
The impedance matching of the IC with this matching network is great (measurement:s11<-30dB). ................................. Now the strange thing: The sensitivity is better with a matching network, which is not very well matched (s11 ~ -7dB). The difference is around you mean the (...)
The simplest way I can imagine is to plot the smith chart. So make a port, your matching network, and your load, then simulate at the frequency of interest using the S parameter simulation. Plot the smith chart and see if the line crosses the center of the chart right at the frequency you care about. Moreover, ADS has a handy impedance (...)
impedance matching and filtering are different purposes, although a LC matching network has filter properties and a filter can be designed to provide matching of different source and load impedances. But a matching network that implements a specific (...)
S11 magnitude is about the minimal information you can get from the simulation. Why not showing complex S11 (Smith diagram) to clarify what the actual input impedance of the antenna group is. Did you already try the suggestion by eraste to check the matching network with 50 ohm resistors replacing the antennas? It should be always (...)
Hello evey body, Anybody can help me i'm a student and i'm new with hfss and patch arrays. i would like to Match 50 Ohm line to 50 ohms Patches in my feed network of 2*2 microstrip array but i can't how can i do it and how can i design the Feed network. if any body have a picture which include the impedance of each line sent it to. I (...)
You have to convert the 1k || -j284 circuit to an equivalent series circuit by applying basic complex arithmetic. (Convert impedance to admittance, add it, convert back to impedance).
Don't use thermal spokes for RF PCB (L1 ground pad). I don't see an actual CPWG structure, rather a micro-strip with distant ground via fence, impedance is mostly that of the pure micro-strip. You could however taper the center line and reduce the ground separation towards the end. Or leave everything as is and put some series inductance for
Seeing different return loss numbers only means that the antennas have slightly different input impedance. The image might change completely with small variations of the matching network. The most significant information is that the 4x1 array has larger bandwidth.
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?
Look in to impedance matching with Parallel (Shunt) Transmission Lines. there are ton of youtube videos explaining how to do this easily.
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.
1) select a device according to operating frequency, gain, supply voltage, power and etc. 2) plot DC characteristics and determine DC operating by using Prms = Vds x Ids. Prms is RF output power. 3) do impedance matching for the PA using commercially available matching tools (e.g ADS and etc). make sure the matching (...)
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.
i agree with eraste. if your line length is less then lambda/2, the characteristic impedance of the line becomes insignificant. RL of -1dB or -2dB is very bad! if you use large capacitor shunt to ground close to PA output , it will affect the S11 of output match. you are right in here! try to generate alternative matching network without (...)
i am trying to match my antenna by using a lumped matching network. i fed the antenna using a lambda/12(using fr-4 @2.4ghz)line the thickness of the substrate i used is 3.6 mil and z0=50ohm. i calculated the dimension using this.(see the link below)
I recently had a project handed to me at work to improve the range of our 2.4 GHz radio. Now I'm an experienced engineer but not an RF specialist, and we don't have any RF people. I've suggested we get some consulting help but was shot down pretty quickly. Also we don't buy enough parts to get any love from the mfg. I am allowed to rent gear, a
how can we know is there perfect impedance matching for our antenna which is designed in hfss?
Your S11 is also too bad.. But your circuit has no impedance matching network ? How it will be improved ?? Check the intrinsic input and output impedances of the CasCode only first then apply proper matching networks to match to source and load.