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Radial Line Stub

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16 Threads found on edaboard.com: Radial Line Stub
Can any one help, for getting lumped model of simple 50 ohm microstripline. if one port is connected to radial stub, what will be the change in model. Thanx in Advance
Dear collegues, I tried to search a lot on internet and microwave journal website but I was unable to found that paper. If any one has that paper kindly attach here Paper name is mentioned below H.A. Atwater, ``The Design of the radial line stub: A Useful Microstrip Circuit Element,'' Microwave Journal, 28, 149 (1985). thanks
Hi, I am designing slot Vivaldi antenna for wide bandwidth.I am using strip line to slot line transition that used in the literature.The problem is using the radial stub to match the feed for entire bandwidth.I blindly using the slot radius and stub (feed) radius the return loss is coming only -5dB with (...)
hi maryam you know for microstrip RF choke you need lambda/4 line that shorted to the ground using capacitor or some thing like that.for lambda/4 line,considering the substrate parameters you can use calculators of AWR microwave office or ADS and calculate the lenght.for the parameters that you need to consider for this line are S21 and (...)
For this narrow bandwidth, you can use a narrow line with length 90° = 1/4 wavelength, followed by a 90° = 1/4 wavelength radial
Hello, i am designing a wideband LNA right now and would like to replace the Piconics conical inductors we are using right now with a planar Bias-Tee. My bandwidth is from 1-9 GHz so i cannot realize it with a quarter wavelength line and a radial stub. Is there a way to use a form of cascaded design with radial (...)
Hello I have a problem with simulation slotline in CST MW 2008. Actually, I want to evaluate impedance of a slotline stub (radial and circular) but face a problem which is that line impedance doesn't depend on frequency how it should be. This obstacle leads wrong results in calculation Z parameters. I (...)
dear frns.. one of most commonly used method for designing bias circuit is to use a radial stub followed by high impedance line... so frns can any one explain how to design radial stub, with center freq = 5GHZ, for bias circuit design....if any oe know about ieee paper (...)
Hi, everyone. I am wondering how to design the DC bias network for varactor in GHz range. I saw many literatures using the radial stub with a very narrow microstrip line as the bias pads. Anyone has some recommendation references of this type of DC bias network and any other topologies? Thanks.
radial stub and high impedance transmission line is a good alternative.
I agree with the replies, and would just like to add something: You can follow the CST examples and implement their setup in your model (look for "radial stub microstrip"). Good luck, P.
You need to compare a radial stub connected directly to the line with a quarter wave with an open other end.
Hi, these are the pages from Brian C. Wadell:Transmission line Design Handbook you can find design information about radial and delta stub there. flyhigh
I found one paper and one book on this topics with this below title: H. Atwater, ?The design of the radial line stub: A Useful Microstrip Circuit Element?, Microwave Journal, November 1985, p. 149-156. and B. Wadell, ?Transmission line Design Handbook?, 1991 Artech house Boston.London, p. 300-305. but i have (...)
Try to make the collector/drain quarter-wave transmission line a little shorter, to be more inductive, and retune the output match. This will improve the load-pull behavior of the PA. Also check the behavior of the radial stub at 2fo and 3fo.
The models are implemented in practically every simulation software. I usually proceed the following way. For example a radial stub to substitute a open stub in the bias network of an amplifier. I design the square stub and then it its a starting point for optimization.