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Hello All,
I have a question about incident electric field on an antenna. Suppose an electric field E_inc (for simplicity I am assuming this field to have only one polarization component - say V) is incident on a vertically polarized antenna. The current induced in the antenna will be E_inc x...
Thanks. I corrected the problem. The only difference I see now is that the matching has improved very close to 50 ohms at 2.54 GHz though in theory it should be at 2 GHz. Any ideas what I should change?
Hello All,
I am trying to emulate the single stub matching network example given in Pozar's Microwave Engineering using a microstrip realization on a 14mil FR4 (dielectric constant = 4.4) board. The 50ohm thickness works out to be 0.675mm for this board. However I am not getting anywhere close...
Hello All,
I followed the procedure as described in **broken link removed** to measure the dielectric constant of FR4.
I made a open microstrip line of width 3 mm and length 4.5mm. The characteristic impedance of such a line according to the analytical formula turns out to be around 48.8 ohms...
Hello,
I need to build a driver board that should have the following capabilities:
1. I should be able to control the output voltage in small steps (I had a digital potentiometer in mind for this) through a computer
2. Should be able to swing from around 0 to 40/50V
3. Should be able to...
Hi,
Could someone get this paper for me:
Planar inductors on silicon for integrated RF circuits
E Tarvainen, H Ronkainen, H Kattelus, T Riihisaari and P Kuivalainen
THanks a lot in advance.
P.
Hi All,
I have read in a couple of places that the length required for resonance for a given frequency for a dipole decreases when printed on a grounded dielectric substrate similar to a patch antenna. But I have never seen this happen in simulations and the length required remains closer to...
Hello Forum,
Are there any good anlayitical models on how to compute microstrip patch antenna efficiencies? There is a comprehensive discussion on this in "Microstrip Antenna Design Handbook" by Ramesh Garg, et al.
But I noticed that these models underestimate dielectric losses. For e.g for a...
You have get your hands on some other CAD software other than HFSS.
I usually export a dxf file from HFSS and open it in ADS and generate a gerber file from there.
Hello,
I am looking for materials that have very high relative permittivity values; in the order of 30 - 50. I know these materials will be very lossy, but I need to know what kind of materials have these kind of high values.
Thanks a lot.
plot gain dbi in hfss
Could it have anything to do with the fact that it is a beta version? I haven't seen something like that with the proper HFSS 11 version. And I don't see why it cannot calculate gain when it can calculate E field.
See if HFSS computes the antenna's peak gain under...
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