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252 Threads found on edaboard.com: Microstrip Width
Hi, can anybody suggest, what should be length & width of microstrip line in filter design? and what are the required formulae for calculation? what should be the position of the same?
hello i am working on microstrip antenna array for first time...i have problem with designing corporate feed network for 4-patch array... this problem is how to calculate the width w and length L of each section (z0=50 ohms) and for (z0=70.7 and 100 ohms) also the quarter wave transform. for example in this figure antenna operate at 10 Ghz how
For an exact calculation, you need to model the microstrip line geometry with layered substrate in an EM (respectively AC electrostatic) solver. For an estimation, a weighted average should work. Considering fabrication tolerances due to substrate thickness, resin composition and etch width variations, don't expect better accuracy than +/- 10 % imp
As was stated you need bigger clearance between the 50 ohms microstrip lines and ground plane. To be outside of the CPW mode, the distance should be at least 1.5 times greater than the microstrip line width.
Yes, it can. microstrips like this are used in amplifiers all the time (outputs usually have a very low output impedance). If the geometry bothers you, you might try different types of filters, or orders. What is your design frequency?
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.
Hi, I am learning HFSS, and I am using to create microstrips antennas. I have the microstrip antenna design in jpeg, I have vectorized the picture and I have created the file with extension .dxf, then I have modified something in the design and I am trying to open the document .dxf or dwg in HFSS. I do : Modeler>import>selectfile ... and
Conductor width/gap ratio to ground should be ~1 for 50 Ohm , otherwise jumpers will appear inductive and cause a return loss problem. More precise calculations can be done with microstrip calculators and network analyzers
You can use this links to design or synthesis microstrip transmission lines, all links use closed-form expressions.
I use Altium a lot and I never seem to have the width/gap modified. I have never done any microstrip (PCB based) antenna, but if you are using tracks they will turn rounded at the endings and every antenna of that kind I have ever seen are all rectangular. I would recommend you to use "polygon" or "fill" paths. When using Altium, at print previe
Here is one nice approach i use when finding interesting microstrip circuit on the internet (papers, websites, etc.): 1. Find element with known size on the photo it can be capacitor, 50 Ohm line width (if substrate Er and thickness is known) or something else 2. Scale photo in such way, that pixel size would represent 0.1mm. For example, 10
Hello sir I am making an voltage doubler circuit at 2.45 GHz in ADS 2009. In this I have chosen 100 pF capacitor and 10kohm load resistor. now I am designing a matching circuit using microstrip transmission line in ads. can u suggest me how to find the appropriate length and width of the microstrip transmission line. (...)
Not good means the s11 is -15 - -20dB at my operating frequency. I want it to be at least -30dB - -35dB. ??? Any step in width is a discontinuity, and vfone showed the corresponding electrical model. Simulated alone, with no other objects, you will never see good return loss. [QUOTE=GIGER
hey i have design a microstrip patch antenna at freq 2.45GHz using guide from balanis book for antenna theory. my results are best coming at 2.4 GHz not at 2.45, what could be the possible error.
Hi All. Say I have a PCB layout with RF microstrip traces on it. Although the Allegro PCB designer is able to show trace impedance (50ohm in my case) by certain stack-up and trace width, am I able to do sort of simulation and maybe check S11 for my layout before sending it to fab? If so, what kind of tools (ADS?) I can use and would you please kind
Hi Friends, please help me. I have designed a bow-tie antenna as with dimensions given in pic also. Dims are given as below; bow tie one arm: arm length=4.1cm, outer width=2cm, inner width=0.25cm Gap width=0.25 cm Sub= width=10 cm, Length= 15 cm, height=62mil, permittivity=2.2 But I am getting maximum total gain (dB) (...)
Hi, I am trying to do simulation of two coupled differential microstrip line pairs in ADS. I used model ML4CTL for variable width coupled microstrip lines. However, I am getting really strange results. For example having S21 of -6000dB. Schematic and results are attached. Can any body
Hello, I am trying to make complex software tool which helps with design of resonators for analyzing dielectric properties but I have problem which I can not solve. How to calculate width of microstrip if known parameters are: characteristic impedance, thickness of dielectric, thickness of trace and frequency. There a plenty of softwares that
Your thought is right. Most probably there is a reflection and mismatch between lines and switches. Into the simulator, try to separate the stages and check what input/output impedance see each stage separate. One important thing is that in microstrip design, a smaller strip width leads to higher losses.
Hi All, Long time I am trying to get dispersion diagram (alpha/k0 and beta/k0) of microstrip transmission line (MTL) using Eigenmode solver in CST MWS, but I could not find it. Is there any way to get the dispersion diagram from CST Eigenmode solver directly? Specially for half-width MTL or CRLH transmission line. I went through the tutorial of CS
Hi, I just designed a simple microstrip transmission line and modelled it in CST. I attached the CST project. According to the microstrip design, epsilon of the substrate is 4.6, substrate thickness is 1.6mm, and line width is 3mm. I verified these calculations in 2 different plugins. The problem is, S11 is always around 0dB and S21 is (...)
Hello, Let me preface this with saying I have no formal training in microwave transmission lines. Everything I know, which is not much, is self taught. I was tasked with creating a microstripline for the purposes of carrying a field in the 500 - 2000MHz range. Our goal is to use the lateral H-field produced by the line to drive small micromagne
hi, i want to design an expeonential tapered microstrip line for impedance transformation from 50 to 100 ohms.now i caluclate w(width of M/S) using tline calcuator and w2=5w.now for exponent factor of m/s line i used a=1/L* ln(z0/ZL) but i dont know how to find exponent factor for ground???that is also tapered in such a way that its widt and M/S l
Hi, I am facing a problem with HFSS port sizing. I am simulating a simple microstrip line of width microstrip_w=50um on top of a substrate of thickness 0.3um, with perfect_E boundary assigned to the bottom face of the radiation box to act as a ground plane. The microstrip has zero thickness. the structure is shown: (...)
I am designing a slot antenna that is fed by micro strip line.But I also need to shield the micro strip line from other electronics equipment that may come in contact with it. How can I achieve it ? I do not want to use stripline. An urgent help is required please. The effective width of the microstrip
hello I want to simulate the aperture coupled micro-strip antenna, and i have the parameters of this antenna, just i want to know how to design waveguide port, i tried to use 3*wf X mt+5*hp:wf is width of feed line,and hp: high of substrate of patch, but for microstrip antenna,you know in this antenna, the feed line and patch are on the same s
hi there !! i've designed a microstrip patch antenna having a gain 4.203 dBi, directivity 7.6 dBi, return loss -33.9 dBi, centre frequency 2.668 GHz, i want to enhance the gain a bit more, what should i do???
I want to design a patch antenna array but I can t find how I can choose parameters of different feedlines (I ll use microstrip feed method )and how it will be adapted with quarter-wave length transformer array will have 4 patches ...
Hello, I have a simple question. I am modeling a microstrip patch antenna as a receiving antenna where the microstrip is terminated by a wave port to "receive" any propogating waves from the patch, which is excited by a plane wave. My question is simply: Do I need to define an integration line when using a wave port to receive radiation or w
For example PCB FR4, with 1.5mm on 915MHz microstrip line with Zo=50 Ohm will have a with 2.8mm. Power 500mW. How will it work in reality when using SMD 0402? It is quite unrealistic to associate such a small part as a thick line. Actually you can use a line width of 0.5 mm, which will have an impedance of 108 Ohm. Length of this micro strip i
Hi My Friends i want to introduce an AEL file to use in linecalc of ads i need to know the width and length of microstrip line and use it in my script file but i cant! can anyone help me pls? thanks in advance ... - - - Updated - - - my problem is that ... it seems that the name of width paramet
for radiation pattern, go to Hfss/Results / Create report / Farfield / Radiation pattern for S11, input impedance will affect the s11 parameter. most of the times, your input impedance should be 50 ohms, and your matching by choosing proper width and height of microstrip feed line could be well...
Hi Fellows, I wonder if anybody could help me to verify the Trace width to match 85Ohm impedance for Differential pairs (surface microstrip) for a two layer board. Currently I have used 12mil/0.3mm trace width with 5.5mil separation. TOP side would have these pairs & BOT would be a GND copper pour. I am confused about the Lower (...)
Hi everyone, I'll be glad if can provide me with documented materials about "off center fed microstrip antennas".. Theory and preferably about the mechanism, what things have to do with impedance ..I've come across some researches, but they seemed to implement the way with no much theory. Thank you and God bless you. Waddah
I googled few papers, and on provided images there are microstrip oscillators of different configurations (ring, hairpin, split-ring, halfwave) having relative high Q factor. microstrip width of such oscillators vary about 50 Ohm. Using such microstrip resonators is difficult, i can't obtain 360*n phase and s21 maximum match (...)
Hi , I'm working on a rectangular microstrip antenna and i want plot Total Efficiency VS. W (width of patch). How i can plot this???? regards.
Hi , I'm working on a rectangular microstrip antenna and i want plot Total Efficiency VS. W (width of patch). How i can plot this???? regards.
Hello,friends i want to design a 3DB coupler.working in 1.575Ghz. deg(S12-S13)=90deg.here is my design and the resonant frequency is not desirable.how can i move the resonant frequency to 1.575. if i only change one microstrip width,the frequency didn't move. how can i set the variable in HFSS.keep the lamda/4 length fix and just need to change th
My first guess was layout software problems: most of them have no such functionality, you must draw such line using thin lines, fill with something. Stepped line width is very simple. Second guess is that is easier to calculate, but...... with smooth change we have less discontinuity, so it can be wrong that stepped line width change is easier to s
i design a microstrip antenna its s11 in resonance frequancy is less than 10 db , so can i canclude that my anttena is matched?? i dont know when i design an antenna directivity and gain in which range is acceptable ? for example 4db gain is acceptable?!!!
Is there any tool that synthesizes the design of directional couplers such as (rat-race, quadrature hybrid, ... etc) ? You know, find the width, length, ... of each tx segment. I already know a bunch of tools which do the work for microstrip and coupled lines but not couplers such as wcalc, appcad, txline awr, .. My problem is that I need to unde
plz can some one tell me how to calculate the "width of the inset feed in microstrip patch antenna" having dilectric constant 4.36 ,height of substrate is 1.5mm and frequency is 2.4835ghz...tell me the formula for this
A microstrip is always radiating a small part of the conducted RF power. microstrip width to wavelength ratio, groundplane geometry, possible bends are different factors determing the share of radiated power.
See
refer and u will get lot of calc like this in website..google it..
well, of course. If you have a microstrip patch antenna, for instance, you must forshorten the patch length x width to compensate for the fringing capacitance along the patch edges. Otherwise it resonates lower in frequency than desired.
You can convert the coils only to microstrip Lines.Capacitors can not be converted,they would be used as are. Consider a coil being as a short circuited Microstipline and calculate the length and width regarding to your substrate parameters.It's so straightforward..
Hello there! I need to design an antenna with given parameters: Range: 1.7 - 2.7 GHz Gain: 6-7dBi When calculating width and lendth of antenna - what resonant frequency should I choose? Is it reasonable to choose an average value - i.e 2.2GHz ? or should it be maximum - 2.7GHz ? Also, when controlling the results in HFSS - 6-7 dBi gain shoul
Hi, We designed a microstrip patch antenna using HFSS having the following parameters shown in fig. 89522 In this fig, when the inset distance is varied slightly ie even by 0.001mm also, the impedance decreases drastically. This could be pretty dangerous when manufacturing the antenna is in question. Is there any soluti