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thanks folks, Doesn´t this makes it difficult to use PDM Works for document management (of Solid Works Files) in the long run? I mean, finishing a project now (2008) you have all SW files in 2008 version. Then, if you do not change the files, but still want to keep them in the vault for some...

Hi, Does anyone have experience running PDM Works Enterprise 2008 with SolidWorks 2007? Any incompatibilities between them? regards t.

Dear Forum, Does anyone know of any user forum for PDM Works Enterprise? I have spent some time searching the net but I do not really find any... Does anyone here have experience with this product? best regards d.

Dear forum, I am conducting some tests on coupling between resonant circuits. Some of the results I cannot really explain, could anyone be of help. Problem: Main LCR circuit is tuned to 13.56 MHz/50 ohm and driven by a 5V (peak to peak) signal. Secondary circuit is a closed circuit of 2 coils...

Hello I have two resonant circuits (tuned to the same frequency) that are magnetically coupled to each other via two coils placed paralell to each other. (energy and data is transferred from one circuit to another) Now, I know that the coupling between the two can be overcoupled, undercoupled...

Dear Group Does anyone have experience using the software FEKO for the simulation of magnetic field. I want to simulate the magnetic field around a loop antenna with several inductors (other loops) close to the antenna. Im not sure if FEKO can do this (easily) or if other simulation tools can...

dear forum, I´m using a passive circuit with two coils (one at each end) for relaying a signal between an RFID tranceiver and a transponder. The system operates at 13.56 MHz. So far I only use a series resistor and a series capacitor for resonance frequency in the passive relay circuit. The...

Dear Forum, I have a huge equation f(a,b,c,d,e) that I need to express as a function of one of the variables, a(f,b,c,d,e) Is there any matlab function that can perform this operation? regards doneirik

hi again.... sorry...I was too fast... I´m programming in Visual C++ .Net 2003. Any C code will do... regards eirik

dear forum, I need to implement a simple routine that performs binary addition of 2 bytes (stored as 'char') (the method is used for calculating checksum for an wireless comm) e.g. char a = '0x41'; char b = '0x52'; '0x41' 1000 0001 +'0x52' 0101 0010 ='0xD3 1101 0011 does anyone have some...

Hi again, I´m still working on 13.56 MHz inductively coupled RFID and have another question to impedance matching. The equipment I have consists of an antenna (matched to 50 ohm) fed by a 50 ohm coax cable and a tranceiver (also 50 ohm). Now I want to design new antennas to connect via the 50...

Hi, I have a 13.56 (inductively coupled) MHz RFID reader with an antenna connected over a 50 ohm cable. In order to test some new antennas my boss cut the antenna cable in two and connected new antennas at the open ends. My question is: Cutting a 50 ohm cable in two, will the two parts still...

Hi again, About the effect I was hoping for: If I place two loop antennas close together (i.e. 2 50x50mm antennas about 5 - 10 cm apart) with reversed polarity, I was hoping that the effect of the coupling would be that the magnetic field would be "stable" at a longer distance from the...

Thanks to all, To VE1BLL: Well, It´s two antennas, no transformer. The antennas I work with are 2 - 20 cm in diameter, which is only a fraction of the wavelength at 13.56 MHz (3.53m) If the signal generator has a different output than 50 ohm, do I still have to construct a matching circuit...

hi, I´m working with some inductive loop antennas for RFID (i.e. no propagation antennas, only magnetic field coupling). The antennas are tuned to resonate at 13.56 MHz and have an impedance of 50 ohm. Now I need to investigate the effect of placing two antennas close to each other, and were...