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xp sp2 + 64 bit + out of memory issue
The main reason to choose a 64 bit OS is related to the possibility to address a very big amount of memory, > 3 GByte. It's difficult to say if you have a meaningful improvement in the case of simulations with only 2 GByte memory or minus.
Bye.
3D EM simulator, CST Microwave Studio is based on FIT (Finite Integral Technique). This general method, in time domain version, is equivalent to a CFDTD.
Bye.
Dear emkenkyu,
you can read "Taflove-Hagness, Computational Elecrtodynamic, The FDTD Method" Artech House, 2nd or 3rd edition. There is a chapter named "Local subcell models ..." with a lot of references, IEEE Transaction papers from Mittra, for example.
Bye
dbi dbm
Dear saran7507,
you have to consider the Friis transmission equation: Pr/Pt=(lambda/4PgrR)2GtGr
Pr=power received from the patch antenna
Pt=power transmitted from the patch antenna
R=distance
lambda=wave length
Gt=gain of transmitting antenna (the patch antenna)
Gr=gain of receiving...
dbi to dbm conversion
dBi or dB(isotropic) is the forward gain of an antenna compared to the hypothetical isotropic antenna, which uniformly distributes energy in all directions.
dBm or dB(mW) is the power relative to 1 milliwatt.
Therefore, are two different quantities. You have to...
If you consider the signal transit time as the energy transit time (associated with the signal) the group delay concept can't be considered equal to the signal transit time. Very often the group delay and the signal transit time have the same value (not in the case of anomalous dispersion) but...
out of memory on line 572
Dear jpsmith123,
you have to consider that Windows XP (32 bit version) addresses only 2 GByte memory (RAM, or eventually RAM + HD swap) for single process. It is possible set a particular flag and, in this case, you have 3 GByte available.
Bye.
The attenuation of a coaxial cable is the lowest when impedance is about 77 ohm. Further a dipole antenna has a real impedance about 73 ohm. Therefore for CATV, where attenuation is important, a cable of 75 ohm seems a right choice.
Anyway, another important feature is the power handling...
Dear Flatulent,
I don't agree with "Group has to be equal to or slower than light because it is a physical thing (transmission of information.)"
In fact, in general that is not true. I copied the page 333 and 334 from Stratton, Electromagnetic Theory, McGraw-Hill, to explain it.
Regards.
If...
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