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45 Threads found on edaboard.com: Impedance Matching Hfss
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 try wit
Hi, See the matching technic... Your feeder is perhaps not matched to the antenna. If it is a square patch move your feed along the symetry axis of the square. At the center the impedance is near a null at the edge the impedance is rather maximum (a few hundred of ohms). The variation follows a cosinus square : Z = Zmax cos?(Pi x/ L) ; x=0 (...)
It sounds like hfss is still normalizing to 50 ohms, even though the characteristic impedance is no longer 50. When you first make your lumped ports, you have an option to check a box "normalize all modes" or something to that effect. Maybe try unchecking that and normalizing on your own? I would think that hfss would normalize to whatever (...)
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.
how can we know is there perfect impedance matching for our antenna which is designed in hfss?
Hi , Im simulating a yagi antenna with 6 elements with the haft-wavelength dipole driven element at 2.4Ghz using hfss v15. The radiation pattern, gain, directivity are as expected :grin: But the input impedance is somewhat i dont understand. As i know the input impedance of an dipole is about 73 +45j(ohm) but the Z parameter graph say about (...)
If you have a certain value of impedance that you must meet, for example 50 ohms, define your lumped ports impedance as = 50 ohms and change your line dimension to have S11 closest to the center of the smith chart. when your S11 real part is too close to 1 and its im is too close to zero that will mean than your impedance line is matched to (...)
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
I want to match impedance of waveport and microstrip line of UWB rectangular patch antenna which are mentioned in published papers of having two notch bands centered at 3.5 GHz and 5.5 GHz.Also kindly tell me how to set the dimension of waveport ? Kindly provide me simulated UWB antenna in hfss with two notched bands.
For proper differential application,balun in needed between your loop antenna and transmitter,of course the balun may be deleted only when your transmitter has diff.outputs. The SMD balun is good choice in our band, impedance matching may be needed.
It does not matter whether u treat your loop antenna as the source or the load with respect to the impedance matching task, though your loop antenna looks more like the source since it is used as the receiving antenna.
I realize it's hard to answer my prior question without more intimate knowledge about my experiment, so I'll ask another questions....can someone please comment on the accuracy of hfss's input impedance results? I ask because I was trying to design a dual band high impedance antenna, and hfss showed great results however (...)
Dear all, I am new in using hfss, and I need to simulate an infinite array of circular waveguide disposed on an hexagonal lattice, working at 15.25 . The radiating elements are covered by a layer of an anisotropic material. Such a test case is reported in the paper: S. Sajuygbe et al. "Wide angle impedance matching metamaterials f
Irrespective of hfss, I leave the port impedance on 50 Ohm and use post processing to calculate the reflection coefficient between the chip and the antenna according the formula you have mentioned. When using a renormalization to a complex impedance, some programs have a different behaviour thus I avoid these functions.
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 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 of Zin1, when (...)
I did not realise that you were actually trying to characterize the matching line. I was thinking that you wanted to get an idea about the impedance of the antenna after removing the effects of the feeding line (this is what I am working on currently). After reading this: "De embedding both input and output ports by the line length seems to do wha
hi, dear friend. i want to simulate microstrip antenna in hfss with coax cable as a feed, but i dont know how to design the feed(for example inner and outer radious of cable) in order to have impedance matching. can anyone help me? is there any formula? thanks.
any luck with finding an answer. I have a similar problem especially with impedance matching.
under edit sources, the input power is set at 2W, after impedance matching the excitation ports, the incident power shoots to 30W!!! What am I doing wrong? Usually the incident power goes up by few milli-watts after impedance matching but not a whole lot, is this acceptable? If I take absolute value of (...)
I am trying to impedance match a 5-element dipole array in hfss using the Active Z re and im values, but I am not getting good S11 with it. How do you achieve good impedance matching of array elements? Please help all you hfss experts out there.
you can easily plot the input impedance by selecting "Terminal Z parameter" and then Z11 as Z11 is nothing but driver side input impedance and i guess you need the same. I have simulated your structure, but it is poorly matched and at around 2.5 GHz re(Zin) says around 250 ohms which for perfect matching should be around 50 ohms. moreover, i (...)
hi friends i am trying to simulate the rectangular patch antenna for 0.75ghz but i am not getting the desired the result ca u help me with this i have 2 types of simulations one without any impedance matching part and other with impedance matching between the patch and feed 173762 2.73763
I'm trying to design a planar phased array antenna consisting of circular dielectric waveguide for 15.25GHz applications(lattice is skew). i modeled hexagonal unit cell in hfss with master/slave boundary condition and PML. and then i want to see my anten impedance matching in all scan angle is good or no!! floquet port and PML toghether (...)
I tried to design monopole antenna for 900MHz using hfss. My antenna dimensions are Radiator length 90mm Radiator radius 0.5mm Dielectric radius 1.2mm Simulation gives me antenna impedance of 79ohm with some inductive part. Do i need to match the antenna impedance to 50 Ohm. When i connect the antenna to VECTOR NETWORK analyzer
Hello all-- I am looking to match an antenna design to an RFIC. I initially matched the antenna to the lumped port set to 50 ohms. I then changed the lumped port to the RFIC's impedance (63-j199), resimulated, and saw no difference. :???: What am I missing? Thank you, Dave
Thanks for replying to my post evyta.I am trying to design a horn antenna using N type connector for feed.I have to use screws for impedance matching.Hope now u'll b able to answer my above posted query.Can you also please upload some hfss file as well that may serve as reference. Hi dlock, What do you mean by scr
You'll notice, that the external dimensions of N-connectors (the "face") are specified in MIL-Std-348, which can be downloaded from the internet. The internal dimensions are however up to the manufacturer, who has to achieve impedance matching over the intended frequency range. You can possibly find internal dimensions in manufacturer documents. Th
I am using hfss to design a passive RFID Tag Antenna. I'm using a microchip with impedance 16-j380 and, therefore,I have to design a RFID tag with 16+j380 to get the impedance matching with the microship. When I define a lumped port in my design, I have to enter the resistance and reactance value of the lumped port. My (...)
The question is not clear. You first may want to design an impedance matching circuit with an almost real input impedance, e.g. 50 ohm, unless the patch antenna can't be designed to have already the intended input impedance. Than you apply a voltage that results in 1 W power delivered to this impedance, (...)
I would like to assign 1000 ohms to a feed line in hfss? How do I do that? Also, how long and wide should the rectangle be? I am building a quarter wave transformer for a dipole antenna to impedance match it. I am using a lumped port to excite it, but my advisor wants me to build a matching network with a quarter wave transformer with (...)
I am using hfss to design a passive RFID Tag Antenna. I'm using a microchip with impedance 16-j380 and, therefore,I have to design a RFID tag with 16+j380 to get the impedance matching with the microship. When I define a lumped port in my design, I have to enter the resistance and reactance value of the lumped port. My (...)
Hi I am working on a patch antenna. The input impedance of the chip is 34-j810. I am simulating the antenna by hfss. When I set the impedance of the lumped port, I found that the initial setting affects the result a lot. So what is the value I should put into? Is 34-j810 (source impedance) or 34+j810 (conjugate (...)
Hi in design of chebyshev impedance matching in hfss software to obtain accurate results what is ground plane's material?copper or pec? which is better? thanks
Hi I design chebyshev impedance matching in hfss Software .when i solve the parametric analyses is it necessary to solve across a range of frequencies? can i delete the frequency sweep? thanks
Hi I want to design chebyshev impeedance matching in hfss Software.i don't know how can i assign load impedance to my I must assigne this impedance to ports?!or another way? thanks
Hi i want to match 50 ohm to 150 ohm with chebyshev impedace transformer that i design in hfss Software.I don't know how assign load impedance to structure. can anyone help me?
I am currently designing a bowtie antenna using ansoft hfss for my final year project. Can anyone help me to explain why does most of the antenna has an input impedance of 50ohm. Is 50ohm consider as an effective impedance matching?If yes why?
Hi how could i determine antenna impedance using hfss
i assume that with size of lumped port you mean that impedance matching. So, try to use the size of coax's(50-75 Ohm) that supposed to work.
Hi, I am new to hfss. I am doing matching filter network to balance dipole antenna. I know ADS but new hfss. Top=Air Copper: 17um Substrate:RT-Duroid 5880 Ground: No Bottom=Air Is anyone know how to assign an excitation differential port with Complex impedance to Coplanar Stripline which is <1mm next to each (...)
The spiral antenna usually has an impedance to about 150 to 200 Ohms. It is intrinsically that way. Most people just design a matching network for a 50 Ohm cable.
Hi! Can anyone plz suggest me which transmission line I should use for calculating the impedance matching in a semiconductor phase shifter? Is copper better than Aluminium?
Another way is to design the antenna such that it has the required input impedance. This way you won't need matching network, which introduces losses and reduces noise figure.
Dear Friends, You can DL the above files @nsoft Teaching Materials High-Frequency hfss Directional Couplers (~189KB) impedance matching and Tuning (~178KB) Microwave Amplifiers I (~1.7MB) 8) Microwave Amplifiers II (~101KB) 8) Microwave Filter