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47 Threads found on edaboard.com: Wilkinson Resistor
I don't see the purpose of wilkinson power divider for an antenna array. Most designs are using simple power dividers.
Hi everybody. I am designing a wilkinson Combiner to sum two signals in phase of 75 each, in 6.3 , in AWR software. I selected an isolation resistor of 60, but in the datasheet mentions 2 of parasitic capacitance. Therefore, i added a 2 capacitor in paralell to the resistor in the simulation. That capacitor, degrades so
Hello everybody I am designing a wilkinson divider in HFSS. 135254 In HFSS how can we make /edit incomplete circle of width 70.7ohm (say 1.846mm for 5.2 GHZ) and incomplete circumference of half lambda (λ/2) for inner and outer circumference. Can it be drawn by using equation by curve. Please help if you can. T
Doesn't make sense not using a terminated port in a coupler or a splitter. For example in a wilkinson splitter if you don't terminate one of the divided ports in 50 ohms, the insertion loss on the other port drops from about 3.3dB to about 0.3dB. But the isolation of the splitter also decrease from about 35dB to less than 6dB.
Hello everyone. I want to design a wilkinson Power divider at 3GHz in HFSS. But I am getting problem in designing 100ohm resistor between the output ports. What should be the dimension(Length width and height) of the sheet for lumped port
I designed a 3-Way equal-split wilkinson Power Divider, but S11 is somewhat large, how can I decrease its value to be -15 dB? 129267
Hi all, I am designing a wilkinson power divider/combiner and I am getting an off-centered matching/isolation behaviour. Phase plots show that the divider gets an effective 180° phase shift between port 2 and 3 at around 160 GHz. 128779 Any ideas about what could be the main reason for this shift and how to improve
hi, iam doing project on wilkinson power divider and going to fabricate it in microstrip.i have found out length and width of quarter wave transmission line.but to represent transmission line in circular form i need to know radius formula.i have searched for formula but couldnt find out the right one.
I think is about pulsed 800W, and not continuous wave (CW) signal. An RF system that use a wilkinson splitter which supports 800W is really a design challenge. In the literature when you search for "High power wilkinson combiner" the maximum supported power is about 100W.
For example i want make wilkinson power divider in shape of ring. But it can be any shape, for example two 70 Ohm quarterwave lines with 100 Ohm resistor at the end. I can calculate this microstrip ring radius, ring consist of two quarterwave arms, so total line length is lambda/2. This bending is only for reduced size of the divider, and identical
In my opinion an wilkinson divider without a resistor cannot be named wilkinson, but whatever else. Planar antenna arrays can use various dividers without lumped elements, and using on board phase shifters to get the desire phase change.
In the image attached can see an n-port wilkinson and the equations for the resistor and line impedance values, for various input/output port impedances. Check how the resistors are connected one to each other.
Good afternoon! Recently I've calculated WPD parameters. Then it was obtained simulation results of schematic circuit. Now I'm trying to create the structure in field representation, but simulation results are different. What can be the reason? please have a look on attached pictures. 101117101118
Hello, currently I'm trying to simulate a 100Ω thin resistor for a wilkinson power divider. Could anyone explain me in detail how to do it,especially how to determine the current line? Thanks in advance
Hi I see your point. A wilkinson divider has match at all ports and equal power split. However you need a 100ohm resistor to make the matching. Many patch antennas are just made on a single PCB without SMD assembly. This is cheap and easy to fabricate. But you are right that it is not the same. If you analyse the wilkinson without the (...)
hi I'm designing some high power combiner/divider for example wilkinson one.Because the divider is high power, I have to use high power resistor too.for this purpose I used ATC high power resistor.according to datasheet there exist some capacitance with this resistors and considering this value of capacitance the results (...)
Hi, A simple basic question.. What is the loss when going thru a wilkinson power divider? I think it's 3dB (because the power splits by 2), but someone told me it's not correct and it's about 7dB... I don't understand why. Thanks guys, Tom
Hello sir , For 4 way wilkinson power divider , I used the TFR as isolation resistor, I don't know ,how to find the thickness and width of TFR. I am getting the wrong values for both circuit and EM simulation for S- parameters for S(3,2) and S(1,1).I expect the reults as follows for both circuit and EM simulations. For circu
Your input legs are not constant impedance lines. All three legs going into your wilkinson should be 50 ohm microstrip lines (assumed because you stated you used a 100 ohm load isolation resistor). I'd recommend taking your input lines straight up and down, then go into optimal 90 degree bends, so they are square to the board edge. [ATTACH=CON
Hello kumarkaushal, Yes, when simulating using electromagnetic simulator you need to use resistor Film to simulate in EM simulator or use the EM Structure as subcircuit in a schematic & then add resistor... There is an example available in AWR MWO installation folder it is EM_wilkinson.emp, go through the same... Just you need to (...)
Can somebody help us on this? I would like to simulate a wilkinson power divider as well in HFSS?
Hi..!, I am designing a 'wilkinson Power Divider' with microstrip which works at 530MHz. I use Ansoft Designer. I want to know the way to add an Isolating resistor in Planer EM Design.
We would need more info to give better answers, but here are some ideas. It looks like they are i/p & o/p wilkinson splitters to go from single ended to differential. I don't know if this needs to be 180° phase shifted or 0°. If it's 0° you can use resistor combiners/splitters as inputs and outputs. (The power might be too much for small re
Microstrip wilkinson is more stable over process and temperature conditions because is not using lumped components. Usually even the 100 ohms resistor is printed on the board. The characteristic of the microstrip wilkinson is not affected by the SRF of the components, and also has wider bandwidth than lumped type.
Just a simple simulations for the above situation, it gets: S11=-6dB (25%) S21=-3dB (50%) It means that if the resistor is working, half of the input power from port 1 goes to port 2, 25% of the input power reflected back to port 1. Where is the rest of the 25%? Because wilkinson power divider actually is not pure lossless, the 100 Ohm re
Recently, I am trying to design a 1:1 wilkinson power divider using stripline. And I have some questions about it: 1. How to compesate the discontinuity, such as t-junction, bend, there some experence about it ? 2. I can have low VSWR at input port at f0(center frequency), but I can not have low VSWR at output ports at the same time. M
Hi guys, I have constructed two designs of three way uneven wilkinson power divider with division ratio of 1:2.5:2.5 in microstrip topology at center frequency of 2.14 GHz, these dividers are needed for designing Doherty amplifier::::I'm alwesy suffering from the shifting of center frequency during the simulating by momentum, e.g. shift to the h
I have used resistive dividers @ 3 GHz with no problem. Of course you get a losses compared to conventional wilkinson divider. But in case you do not mind burning half of the power in the divider resistors and you don't mind that the isolation between output ports is only 6 dBs, then resistive power divider is most simple solution (and cheap) use 5
Hi, I am working on a CPW wilkinson combiner. I get confused about the port types to use. Should I use differential or internal? ( on strips ). And I want to use thin film resistor as the isolation resistor. Where should I simulation them, in the layout or schematic(co-simulation)? THank you.
Hi! I have some problems with the wilkinson power divider,the picture of my power divider as follow. 1. Will the TL1 ,TL3&TL4 's length can effect the S11 or S22 and S33?If so,the length of TL1 ,TL4&TL4 must keep a special length as λ/4 or any other value? 2. I have sim it with ADS,but I found the S22(return loss of PORT2(TL3))is very v
I am facing one problem in ADS momentum, i am designing wilkinson power divider. i have done the lay out. and trying to tune it in 1 Ghz. but the problem is coming due the isolation reistor 100Ω, connected b/n the two o/p. i am confused abt the choosing the resistor. what kind of resistor should i choose ? thats why o/p return loss is (...)
Hi It is true that a three port network cannot be lossless, reciprocal and matched at all ports, at the same time. The wilkinson is matched, reciprocal, but not lossless. It is between port 1and port 2 or 3. But the wilkinson it is LOSSY between the two isolated ports. So it satisfy the condition. Regards
OK this is probably a simple question, but I need to check myself on this. When using a wilkinson as a combiner, with equal amplitude and phase signals input, what is the output. For example, a 2 way combiner with port 1 being the output port: 10dBm on port 2 10dBm on port 3 Power present on port 1?? Thanks
hi, i am using corporate arrangement of wilkinson coupler to split an input power into 4 ports(Equal division) and 4 power amps are used each with an output of 2Watts. My question is that the isolation resistors used need to be power resistors or ordinary resistors will serve the purpose,keeping in mind that there might be (...)
5W would be fine for the power of the 100 ohms resistor when you combine 250W, and 10W for 500W (the parasitic inductance of the resistor should be very low). Beware to terminate correctly all ports when you combine powers using wilkinson splitter, otherwise the 100 ohms resistor it will burn instantaneous.
Hello I am designing a wilkinson power divider these days. I will have to simulate it in Microstripes 7.5. Anyone can tell me how to simulate the resistors? I have read many times about the chapter 'wire and circuits' in the reference manual but still cannot understand. Best Regards. kevin
hello, I have a question regarding this article 'A General Design Formula of multi-section Power Divider Based on Singly Terminated Filter Design Theory' on wilkinson power divider design. Let's take a 4-section power divider just for verifying the formulas.First, I got the impedance of optimum transformer (120% bandwidth ,0.01 ripple). All
Hello I am designing a wilkinson power divider these days. I will have to simulate it in Microstripes 7.5. Anyone can tell me how to simulate the resistors? I have read many times about the chapter 'wire and circuits' in the reference manual but still cannot understand. Best Regards. kevin
I've prototyped a 12GHz wilkinson on a Ultralam2000 laminate and got very bad results. Biff, what resistors do you recommend? Ordinary 100Ohm 0603 is unusable...
hi, i am trying to make wilkinson power divider (equal or unequal power division) in IE3D , but don't know how to define or implement the chip resistor in IE3D software. if anybody has any idea or tutorial example , kindly share ion this forum. with regards abhi
Normally in a 2 way wilkinson power divider the value of the resistor is kept constantly 100 ohm!!.
Can I add passive components in CST? I have built a wilkinson Power Divider with its connectors and so on, but I don't know how to add the resistor connecting both arms. Please help me!
It is a 200 W pulse amplifier. I know only wilkinson and T-jutction power divider. In wilkinson, we did not connect any resistor to ground. that why i am dont know why they did that here. I doubt that this is a balance amplifier but i could not figure out what that circuit is. They use balance amplifier structure for pulse amplifier for (...)
I am going to simulation wilkinson hybrid use ADS2004A. Now,i have a problem. I don't know how to setup TFR (Thin Film resistor) . In A DS help, "Rs = sheet resistivity, in ohms/square. 2. If Freq is set to a value other than zero, then Rs is scaled with frequency as follows: Rs (f) = Rs (Freq) (f/Freq) (for microstri
hi all,how i simulate resistor in XFDTD in order to simulate wilkinson divider thanks alot
In wilkinson splitter, the signal splits into equal amplitude and phase signals appearing at ports 2 and 3. Since each end of the resistor is at the same potential, no current flows through it. So, the resistor used in the wilkinson splitter generally has a power rating of just 100mW. This in case that all ports are well (...)
i would like to know is it possible to design wilkinson combiner without isolation resistors with changing in characteristic imp. or length and the same performance for return loss thanks in advance