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# Substrate Width Length

44 Threads found on edaboard.com: Substrate Width Length

## resistance of the substrate

Hi, I'm designing inductor model in CMOS process. I found few formulaes online for the model. The resistance for silicon substrate is given by Rsi=resistivity *2/(w*l) where w and l are width and length of the inductor. I'm getting the value around 36 Kohm. Is it right?

## HFSS Surface Recovery Failure error

Hi, I have an array of nanowires which are basically cuboid. They have length=1um, width=1um and height=1um covering an area of 36x36um located 10nm apart. They are on a substrate of height 10um and area 48x48um. When I change the height of the nanowire from 1um to 4um I see the error: Surface Recovery failure Possible reasons : (...)

## Substrate integrated waveguides

How to define ports in substrate integrated waveguides . Can anyone help me design a simple structure of SIW fc at 10Ghz in hFSS.

## how to design Quadrature Hybrid Coupler in HFSS?

Hi Stingerx, What are the substrate details ? Based on er and height of the substrate, you can use online microwave calculators to determine the length and width. -sv

## CST strange radiatin pattern problem

Dear all, I am designing a simple slot antenna (just a rectangular cut in the ground plane) at 75GHz on a thick Si substrate . The slot has a length of 740um and a width of 22um as shown in next figure 107466 for a small ground plane (1500 x 1500 um), the radiation pattern is perfect. It resembles that of a dipole but

## What are the basic parameters for analyzing a Frequency Selective Surface?

But the FSS elements resonance frequency, bandwidth will vary with the following. So you have to consider, -TE/TM polarization ( your S11,21 will be different for TE and TM) -Incidence angle variation (theta,phi) -parameters of the FSS elements(like width, length, periodicity,substrate thickness)

## planar antenna exponential profile

I want to realize a palanaire antenna which radiated exponential format, but I can not determine the right size: - Minimum width entered maximum-width output - The length of the line knowing that I work the 9 GHz frequency and use a dielectric substrate constente equal 4.9 and 1.45 mm thick I try with L = 10mm and (...)

## Help need to convert lumped element model LNA to using MLIN fabrication level.

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..

## can u help me to design microstrip transmission line for 2.45Ghz,50ohm?

Take a free software, enter your substrate and get length and width. It's not so complicate.

## bow tie antenna substrate and impedance design,need help

hi,can any one help me in designing bow tie?i am thinking of designing it for 100 ghz and i use formula for length l= lemba/2*sqrt(epsilon) and width =1.6*lembda/sqrt(epsilon) now my problem is that how to find out flare angle?i-e tan(theta)=l/2/w/2 is ok for full bow angle or it gives half of flare angle? secondly on hfss when i define lumped por

## Measuring resistance between two substrate contact rings

Hello, I would like to know if anyone has a relatively easy way to estimate the resistance through the substrate between two closely spaced rectangular substrate-contact rings (P+ diffusion in a P- sub). The length/width of the rings can differ. below is a diagram to help illustrate what I am addressing: Any help would be g

## Very small notch (and feed width) for a inset-fed microstrip antenna, is it correct?

The calculator over at gives me 0.156 cm microstrip line width These 1.56mm are consistent with results from another transmission line calculator (AWR txline). This is a reasonable, expected value for 50ohm line impedance at 0.8mm substrate height. I have not checked the inset length, but the rati

## microstrip parallel coupledline bandpass filters

which dielectric constant is good? what substrate height is good? It depends on your manufacturing capabilities (minimum gap/line width) and mechnical tolerances. Higher dielectric constant means shorter resonator length. Advantage: small filter dimensions Disadvantage: more sensitive to etching precision

## single patch antenna design

Hi, I am designing a single rectangular patch antenna for 2.4Ghz. i am using inset feed. I used the std formulas available in Balanis to cal the length and width of rectangular patch. The length = 30mm, width=38mm, Er=4.4,height of substrate(fr4)=1.6mm. The feed width was 0.5mm. I (...)

## Inset characteristic of a microstrip patch antenna at 12.1 GHz on glass substrate

width of the line depends on the substrate and the height of the substrate for a given impedance and is independent of the frequency.what you said makes no sense.can you re iterate your words streamlet so we can get a good idea as to what you are saying Regards Sajid Mohammed.

## determination height and weight of patch antenna

I am in the initial stage of design antenna. I need to calculate the dimension of patch. The substrate i used is RT 5880, so the dielectric constant is 2.2. But how i determine my height of patch in order to calculate my length and width?Thanks ---------- Post added at 14:59 ---------- Previous post was at 14:58 ---------

## Low pass filter design - Microstrip

Hello, Use the TxLine -Transmission line Calculator to get the exact width & length of the Microstrip lines for say Er=4.3 (with substrate height =0.8mm) & 64.9 ohm then the approax values are W=1.5 mm & lamda/8 electrical lenngth L=25 mm... Follow the similar steps to calculate other

## Problems extracting RLGC parameters for various substrate resistivities in HFSS

Hi, I am trying to simulate a microstrip line with 3um thickness, 50um width (Z0~85 ohms) and 1000um length on a substrate with various resistivities such as 1e3 ohms-cm to 1e6 ohms-cm using HFSS. I have used lumped ports and an airbox that is at least λ/4 at the lowest simulation frequency. I am trying to extract the RLGC parameters (...)

## I simulated paper in hfss but the results incorrect

Try feeding with lumped port and reduce its size. Make it equal to the feed (in width ) and length = substrate thickness, I guess it is touching the gnd. Your file: CPW has got no analysis setup.

## log periodic dipolle or loop antenna

The effect of substrate on length of antennas: The dipole length will be reduced by a factor of square root of (effective dielectric constant). Effective dielectric constant depends on the frequency of operation and the width of the dipole. You find the formula for calculating the effective dielectric constant in (...)

## how to calculate size,length,taper rate in vivaldi design for 3.3GHz centefrequency

length of taper = lamda at lower frequency. width of taper = lamda/2 at lower frequency. You can use a microstrip as a feed line. If you designing a Vivaldi Antenna, then only one input port and measure the S11. What is the dielectric constant and height of the substrate ?

## Microstrip filters - dimensions

Only the width of the feedline matters which should be matched to 50 ohm impedance. length of the feedline plays a minor role when you are using a dielectric substrate with very low loss tangent. For example, for Rogers 6010, loss tangent is 0.0023 compared to the loss tangent of 0.02for FR4. And the loss introduced by the (...)

## How to select specifications for antenna design ?

i tried the patch and loop antenna using the specified parameters that r given in ADS .PLS........ can any one guide me in designing PIFA and also i did not know how to start up with the antenna specifications,is there any standard design procedure....how can we select the length, width,height,substrate etc......pls guide me...give me any (...)

## Coplanar strip lines length results discrepancy

Hello, I am designing a simple asymmetric coplanar strip lines (widths are different for each strip) using Ansoft HFSS v12. Dimensions and specifications: length of strip lines: 20mm width of one strip: 2.835mm width of other strip: 2mm Thickness: 0.017mm substrate relative permittivity: 2.2 (...)

## Microstrip-Wider track width-Effect on RF Performance

what will be the impact on RF performance? It all depends on the length of the line relative to the wavelength. If the line is 1/20 wavelength or shorter (effective wavelength including substrate epsilon), then the impedance transformation due to the wrong Z0 can be neglected. If your line is longer (...)

Hi sool83, My question is why you use internal ports instead of single ports? Furthermore, as I remember it is not necessary to use two ports as "ground reference" for a CPW simulation. Generally, if you made the right set up for momentum the results are really close to ADS schematic simulation. So just check the setup of your simulation (sub

## How to simulate CPW impedance in ADS/Momentum ?

Hi, so I'm trying to understand this -- using ADS/Momentum and CWP lines, I'm starting in the schematic editor, adding a CPWsubstrate and a CPW line of a certain width/gap/length which is matched to that substrate. I then simulate this and am trying to see/optimzie the CPW width/gap size(s) in order to (...)

## Urgent: how to simulate 50 ohms feedline in HFSS?

I am relatively new to HFSS and need to simulate a 50 ohm feedline for a monopole slot antenna. The antenna is from the literature and it specifies a 50 ohm feedline, and I am not sure how that is simulated in HFSS. The feedline width and length is 2mmx16mm and the substrate thickness is 2mm with relative permittivity of 4.4. I have entered (...)

## Help on PIFA: wideband/multiple band compact antenna design

PIFA get the resonance when the W + L = λ/4 (it depends also by substrate height and permittivity). where W and L are the width and length of the active element. So, the dimensions of the PIFA for 138MHz will be large (almost 30cm long). For lower dimensions I would recommend for this band a printed helical antenna or a meander (...)

## How can I improve the gain for a patch antenna?

How can I improve the gain for a patch antenna ,it is fed by a Coax and shorted to the ground? width W=20.2 mm and length L=6.6 mm Resonant frequency 2.45 GHz and the substrate is FR4-epoxy ε=4.4

## How to calculate waveport LENGTH & WIDTH

The width is same as your microstrip feed line & length/height is same as height of substrate. see any micro strip example of HFSS. search in this forum you will find many examples

## how to give ports to feed and ground plane

hi how to give ports to ground plane I should get "VSWR<2"... My antenna is having a microstrip feed with width 3mm and length 11.5mm,ground length is 11.5 and width 30mm....thickness of substrate is 1.58 dielectric constant is 4.4.....

## Substrate in Momentum- size in practical applications

in ADS MOMENTUM! how size(of sabstrate:width,length) is determined in practical applications? thank you for your attention!

## Right port dimensions for microstrip line in CST, time doman

Hi! What dimensions should have a port for a 50Ohm microstripline (1.1mm width and 8mm length) on a 0.5mm thick Rogers 4003 substrate (Er=3.55, tandelta=0.0027) for CST time dom. simulation for freq 0-40 GHz? It is something wrong width my s21 insertion loss - much more than that of the same line simulated in ADS and in (...)

## Help needed :Microstrip Parallel Coupled Line Coupler

Hello Saifullah, Use AWR Microwave Office (MWO) tool to build the coupler Circuit Schematic as shown in the Circuit Schematic PDF document (Microstrip substrate GML 1000, MCLIN are used ) width = 3.469mm, Gap = 1.321mm, length = 6.029 mm Then for frequency range 8 GHz to 12 GHz, circuit optimizations are used to meet the following (...)

## resonant frequency of microstrip patch antenna

Hi, i am trying to find resonant frequency of microstrip patch antenna has (for patch width=57 mm length=38mm, for substrate h=3.175mm permittivity=2.33 ) parameters, which solution frequency should i define to add solution setup? By the way i am checking rectangular plot (S_11) to see resonant frequency,does driven modal or (...)

## Microstrip - real lines - ADS

Hi You can find in for mation on microatrips with Google. Otherwise look in "Microwave engineering" by Pozar. In ADS you can just use the pallete called "Microstrip". There you specify the physical length and width of your line. Remember to add a substrate definition, think it is on the top of the pallete. Regards

## Questions about SAW filter design

hey all, i'm working on the design of a 35-45 MHz SAW filter on a 500mm, 36degrees Y-cut, lithium niobate substrate. Q1) Is it important how do i place the fingers on the substrate? I mean, does the direction on the substrate differ? Q2) I have some idea about the x-axis which is finger width (lambda/4) and finger (...)

## Help me please for Coplaner Stripline Antenna design

I was trying to recieved wideband Radio frequency 3MHz to 300MHZ. I made an antenna brass 10cm length and width 0.5 cm symmetric stripline antenna using 0.001cm polyethene substrate. It can recieve the frequencies 30MHz to 70MHz range. Please kindly help and guide me how to ..any book or simulation. Thanks and regards

## HFSS Transformer simulation problem

I am trying to model a transformer using two spiral inductors on two separate chips. This setup is commonly used for magnetic resonance coupling to send data between two substrates. I want to eventually export the results into a spice simulation; however, I am getting some execution errors when I try to simulate the setup. I get:

## Simulation of a Microstrip Patch Antenna using EMPIRE-3D EM

Hello All, Can some one help me on this Simulation of a Microstrip Patch Antenna using EMPIRE-3D EM Simulator (project file required) Problem Details: A square Microstrip antenna etched on the above substrate (air) has a length of 63.7 mm and width pf 63.7 mm. A metal rod is used to connect the ground plane and the patch. This (...)

## problem defining substrate(infinite in half space) in HFSS

Hi all I am working on antennas using HFSS 9. Can anyone tell me the procedure to define a substrate that is infinite in half space? That is infintie length infintie width and infintie height. Kind Regards, Arun.

## How to choose dimensions of microstrip between 2 components?

there are some standard formulae that provide width & length of a microstrip depending on the type of substrate used, the thickness of the copper cladding. These are for higher frequencies. To answer your question, the width of your track will depend on how much dc current is going to flow through.. go to rogers website and (...)

## Input impdance of an inset fed microstrip antenna

Hi all, For a 350 ?m GaAs substrate with dielectric constant κ= 12.9 and with patch patch length and width almost equal at 5.7 mm , what can be said about the input imedance. CST-MWS simulations are giving me a value of about 1100 Ohms. Can this be expected ? Is there any independent verification ? Normally the impedance (...)