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Hi
My question is simple: I've read in several articles and AN-s that the resonant frequencies of a SAW resonato (whose equivalent circuit can be aproximated by an RCL with a C in parallel) can be shifted by adding a parallel C or a series C.
Being resonant frequencies given by the properties...
Hi jiripolivka
If I got it right, it is necessary in any situation in which I have to insert adaptors from my input and output coaxes to any other waveguide structures in which I embed my DUT for measure, and that are not 50ohm.
Because then I'm setting my calibration plane in the midle of...
Hi all.
Regarding S parameters and their measurement with modern VNAs, most of the times reference impedance is 50ohm, as is the characteristic impedance of the waveguides that connect the VNA and the DUT. This way, TRL calibrations (that set the value of Zref) are consistent and the VNA...
Hi volker, thanks for your instant reply!!
I thought that EMPro being a specific microwave design tool would incorporate a somehow improved FEM engine compared to ADS, that's why I started to use it, but if the FEM engines are almost the same, I'll give a chance to ADS's FEM also.
Maybe its a...
Hi all.
I'm doing a Ph.D in MMIC design for uW frequencies and I'm new to ADS and EMPro, though I have experience with MWOffice and CST, so I'm familiar with EM simulations.
I'm trying to export an ADS PA MMIC design (with a proprietary PDK) to EMPRo, and simulate it with the FEM and FDTD...
Hi Batang
Thanks for your answer.
Yes, as you say, I have to power down the GPS engine before entering sleep mode. This works fine and I have cut my module's consumption down to 2,5mA. But about the 30mA current when shut down (CPOWD =1)... The circuitry I have attached to my module is the...
Hi Batang
Thanks for your answer. To be honest, I had tried the CSCLK command before. But the thing is that my module is not exactly a SIM900 but a SIM908 (GSM/GPRS + GPS engine, but the GSM/GPRS part is a SIM900) and this may be the reason by which my module takes about... 30 SECONDS!!! to...
Hi v57ali
I have this same issue in a design. Did you succeed on entering sleep mode so that current lowers to the 2-3mA range??
Thanks in advance, best regards
Iban
Hello everybody
My question differs from the current topic of this thread but, as several aspects of SIM modules have been discussed here, I think it may be approppriate to put it here. Let me know if I should move it so somewhere else.
In my SIM908 module, I have PIN #55 set up as rising edge...
Hi Pozzari
With regards to your core file version, I am using "1137B02V01SIM908M64_ST_DTMF_JD_EAT" so i would recommend you to download it from one of my previous posts (4-2-2013). Replace the original download tool by the one supplied (v1.3) and load your app. With this core, user app. needs...
Hi Marco
Thanks for your answer. I share much of your opinions... and i think there is still something I´m missing. Rather than being a pure CST software question, my doubts are related to EM. May be it´s a matter of nomenclature. For me, "even" and "odd" refer to classic CPW, with "even" mode...
Hi. I´m doing simulations with a patch antenna, fed by a CB-CPW line... And though I thought i knew CB-CPW well... Some doubts have shown up... Your help will be kindly appreciated.
I now there are more modes in this structure but i guess the usual propagating one is the CB-CPW mode, from...
Hi Chinmay. Yes, thursday I succeeded with interruptions... I'm still "fine tuning" my code, that´s why I haven't replied yet. But as I was afraid of, it was a matter of a new core file...so I asked for and got a new file "1137B02V01SIM908M64_ST_DTMF_JD_EAT" together with a new downloader, and...
Hi Chinmay
Yes, as you mention, documentation is not a strong point of this (otherwise good for me) module. I have also been doing lots of trial and error but no way i can get an interrupt from the core... With regards to defining the pin as input first, speaking from what I have understood...
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