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72 Threads found on edaboard.com: Thick Substrate
1. Use thicker substrate Or 2. Use non-50 Ohm system. For hybrid couplers I used 75 ohm system to eliminate too thick lines. Here you can do the opposite: use some 40 or 30 ohm impedance instead of 50 ohm.
You'll notice that transmission lines of given impedance can be easily scaled in dimensions. If you have already a correct calculation for one substrate height you also know the results for others. If you are stuck to a thick substrate you might consider coplanar scrips with to ground to reduce the trace width.
I am not sure if the question is correct. I know that in thicker substrates radiation loss is higher. What about line width, is there any relation?
The critical part of material selection indicates.... This UWB antenna was fabricated and printed on a 1.6-mm-thick FR-4 substrate with permittivity of 4.4 and a loss tangent of 0.024 Often these values are not given for 1GHz , let alone 10GHz and are often too high as fiberglass content raises permittivity and loss tangent. Suppl
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
Hello all! I have used calculators, such as and And some formulas from papers on patch antenna. It wor
Hello. I am designing a Printed Microstrip Dipole Antenna with the specifications as follows. 1. The antenna is printed on a 1mm thick FR-4 ("r= 4:4) substrate. 2. On the front side, the length of the dipole radiator is lamda/4 3. Frequency: 2.45GHz This is antenna I designed But after I put the antenna up to reflect the changed parameter
Hello. I am designing a Printed Microstrip Dipole Antenna with the specifications as follows. 1. The antenna is printed on a 1mm thick FR-4 ("r= 4:4) substrate. 2. On the front side, the length of the dipole radiator is lamda/4 3. Frequency: 2.45GHz Could you please tell me how to calculate dimensions for the antenna as shown in the picture
The thickness that is specified is typically the thickness of the dielectric substrate, and does not include the outer copper clad thickness. So a 200um controlled thickness board with 35um (0.5oz) copper will be 270um thick overall. (Cross section = 35-200-35)
I've already tried this, but i could not get two resonances close enough. Got good results only with thick substrate about 7-8 mm Yes it`s true. Better bandwidth are with air gap and normal dimensions ( electrical dimensions equal to physical ) . Also possible some multi path, four for instance. It will be better.
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 3mm = Wmin and Wmax = 20
Man, there are substrates a lot thinner than 10 mils! Look at Megtron 6 material, for instance. I have used 2.3 mil thick layers for fine pitched leadless chip carriers. You need the thin substrate to be able to plate the small diameter laser drilled via holes in the solder pads.
if the patch have a same width with feeder, is it can be still as a patch? for some substrate thick there has no ground on back side, and add a shape on same side with conductor, how it be same function of groundplane, is it CPW structure but have different formula to calculate feeder width
what is the selection rule of substrate height Thin substrate advantages: - shorter via through the substrate = less inductance for vias to bottom side ground - less radiation thick substrate advantages: - wider lines for the same line impedance, so it is easier to implement high impedance lines - in (...)
I am designing housings(metal enclosures/box) which will house circuits operating at C-band. Another housing for X-Band. I want to ensure that box does not resonate at these operating frequencies. box dimensions : LXBXH=190 X 40 X 15 cu. mm for C-Band,with 50mil thick substrate. =100X 35 X15 for X-Band
use a thick substrate
I 'm simulating a passive circuit(microstrip filter) using agilent ads with MOM engine simulator. My problem is that by choice of a substarte (ε =10) thickness of 2.54 mm the simulation result goes wrong. On the other hand, s21 is above zero dB(for a passive circuit). I should mention that by choosing the same substarte with thickness of 0
Hey guys, I have a problem in the port definition in IE3D. The problem is that I am using a substrate that is 0.635mm thick (RT5010) and am trying to simulate a transmission line with it. However, when I define the port to it, I am getting a warning that higher modes may be excited and when I do continue with the simulation, the results that I a
but which one should I choose ? This is an engineering decision. thick substrate --> wider lines, wider gaps Thin substrate --> narrower lines, narrow gaps
Hello Radike, your 2-port and 1-port model have a different stackup. In the 2-port model, you have the thick silicon substrate below the inductor. In the 1-port model, you have deleted the silicon and now have lossless metal very close below the inductor. This does change the inductance a lot. For cocal ports, you might see different r