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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
Hi I am doing emcosimulation of an Rf rectifier. Please consider the following figure: 136569 Part B contains the pads for diode and lumped components (boxed) plus an additional line. I EM cosimulated this , found the input impedance, and designed a matching network shown in Part A (boxed). I connect them (point 1 to
Hello everybody, I´m measuring the impedance and the sensitivity of a RFID IC. First I was measuring the impedance of the IC. After this step I was designing a matching network which transforms the 50 Ohms SMA-Connector to the impedance of the IC. The impedance matching (...)
Hello. I would like to know how to create a good impedance matching and how to ensure your impedance matching is a good matching with ADS. Any tools or method?
Hi, Chapter 23 of "Analog Design Essentials" by W.Sansen discusses LNAs (and impedance matching), but it doesn't mention either of the filters in your question, not sure if it can help.
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 (...)
zin=0.05+j33.36 If the real input impedance of your antenna is actually 0.05 ohm, start with redesigning the antenna. matching this tiny radiation impedance is a helpless undertaking.
The discrete balun and output filter combination has several degrees of freedom, one of it is the impedance of the center junction. One approach is to make the left side performing the impedance transformation so that the right pi filter acts as an additional low pass that can be omitted without changing the impedance (...)
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.
Without looking at your design, I'd have to say that it's expected. Commercial Yagi antennas typically have some kind of matching network (Gamma, Delta, etc.) to tune the antenna impedance to near 50/75 ohms.
So attach a source and a proper impedance / energy transfer matching & modeling network, sweep the amplitude and -record- the input (@where?) and output power waveform, and plot or do the math as you like.
dear cannibal, I'm not really an expert in ring oscillators, but have designed colpitts and hartley oscillators before. Why don't you try hartley oscillators? Hartley generally wideband oscillators. Will it give the bandwidth you wanted? The reason is because the output impedance of hartley will be reasonable and you can design a buffer to get high
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 (...)
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 impedance transforma
Dear all, I would like to appreciate your help in advance. I am just a beginner to design RF matching network for plasma technology. is there any one who has a C code for a controller? I am looking for your help. Thank you
hi can anyone tell me how to find antenna impedance ZL of coupling element antenna in hfss and how to design matching for such antenna
Measure TX impedance. measure antenna impedance, create a conjugate matching network. 1 km and free optical sight reliable connection can probably be done with any reasonable directive antenna. For 30 km is a well designed parabolic dish in both ends enough. At that distance must antenna height be high enough for optical (...)
The standard transformers don't work at 500kHz but your may find ferrite core transformers (or you can do it yourself too) that would work at that frequency.Don't consider L-C matching etc. circuit because power is really high, small components ( except special ones) can not resist to this power level. The optimum way is to use a ferrite core trans
You do not say what the power is or the input impedance of the plasma chamber. I would put the matching network as close to the chamber as possible and most importantly tune it for minimum reflected power to the generator. Frank
Hello Friends, Any body know that how to change the port impedance of Agilent network Analyzer, for example if i want to measure a matching network of 20-50 ohm measurement then how i have to change the impedance of port 2 to 20ohms in network analyzer I have done with Anritsu but i can't (...)
I suppose there's no pure L matching network solution for the given impedances. Do you mean LC matching network?
One or two antennas connected at the same time will alter impedance seen by transceiver and impedance seen by internal antenna. matching network or coax cable will act as stub-matching for the other antenna. A common way is to integrate a switch in CON2, switching to internal antenna only when no external (...)
I?m a PHD student. I?m looking to design dual band filter or impedance matching network for an antenna. This impedance transformer or matching has to be lumped components. I have measured S2p file for the antenna. Can anybody let know if there is any method to use Agilent ADS to do dual band (...)
I think impedance needs to be considered and also the matching of the networks.. For this first you need to ensure the stages before these are verified
You can get a formula for the complex impedance of the antenna from Wikipedia under "Short Dipole" on the "Dipole Antenna" entry. and there is a section on "General impedance can use a calculator on it. You will be looking to
Size matters. Large loops (circumference ≈ λ) act like dipols, small loops are pure magnetical antennas with low radiation resistance. See for the differentiation. A impedance matching network will be required to connect to a 50 ohms line.
With impedance matching you get an efficiency of only 50%. But for a source with a fixed output voltage and a fixed impedance you'll get the most power into your load if its impedance matched. For example if you have DC circuit with a 10V source with an internal resistance of 5Ohm and a load of 5Ohm, each the load and the (...)
Hi I am simulating a simple microstrip transmission line (TL) based impedance matching network through HFSS. Important factor in this design is to check the input impedance (Zin1), that is observed while looking into the matching network. However, simulations indicate different values (...)
See this thread about TI CC2520, a 2.4 GHz radio: Is it a related type of problem? According to that link should impedance matching at least for first harmonic be high impedance matched (reflective) as it affect TX efficiency. My practical tests with CC2520 shows that also. It can be a dif
The problem is that 1 ohm real impedance can't be easily implemented for wide band, I wonder how the interface of your filter looks like? But provided you made an impedance matching network, you can verify it's parameters with a network analyzer. The other point is that the divider has > 30 dB (...)
Are you sure that you want RC instead of less lossy and noisy LC? Are you sure that it not is the conjugate matching network you want? Y seems more like Z? If you can attach a s1p-file for rectifier impedance and frequency range is it easy to solve.
The 2*f interstage filter provides high impedance at desired selected frequency, and provide a short circuit to the unwanted frequencies. Using this filter has the advantage not only to reject unwanted harmonics (and reducing intermods) but the filter can integrate an interstage matching network which helps increasing multiplier efficiency.
You need to know M1 input impedance for the given operation point and circuit. Unfortunately, it's affected by M1 load impedance. So you'll usually start with an estimated value and later adjust the matching networks. Then the matching network can be designed by different methods. (...)
I made some experiments on L-network Z matching, first I try the circuit without any match (R1 is source impedance and R2 is the load impedance), and got the following result: the voltage gain = -0.828 dB @ 100MHz I repeated the experiment again, but this time
It depends on a lot of factors. Needed impedance ratio adjustment, stray capacitance, losses in components and PCB traces. In general are losses higher for upper part of the matching frequency range. I do a lot of broadband antenna and RF filter matching, low power, compact, using 0402 components or smaller. Typical frequency range 300 MHz- (...)
What does impedance transformation mean with regards to antenna? For most folk, this means to alter the driving point impedance by adding some sort of matching scheme. This is usually a network of matching components/devices , between the the energy source and the antenna driven point. Stretching the (...)
Is not a particular type of impedance match. The series gate inductors are used to resonate the internal Cgs of the FETs. Also there are two identical high-impedance bias networks (for Vgg), most probably using quarterwave TL, series chokes, and decoupling caps. The blocking caps (in series with gates) can be used for narrowband (...)
Here's a patented tuned open cct stub at right angles to the waveguide.
To avoid loading the output matching network, there is a normally rule of thumb by which the bias circuit impedance should be in relation to impedance at the drain and matching network. Is this 10X refer to the magnitude of impedance or 10X the real part of the (...)