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If you are familiar with MATLAB, there is a k-mean function in matlab. If you plan to use C/C++, you can look at the book called numerical recipe in C to get k-mean c-function.
ads library bfg425w
It seems that NXP does not supply the spice model for BFU725F. Why dont you try other transistors such as BFG425W
https://www.nxp.com/#/pip/pip=[pip=BFG425W_4]|pp=[t=pip,i=BFG425W_4]
how to measure transistor
**broken link removed**
Try to extract s-parameters using spice model provided by NXP will be the easiest way. Otherwise you have to measure s-parameters using a VNA. You will need a bias tree and a test figture.
I dont think it is possible to do so. However, CST provides interface via visual BASIC and if you can connect visual basic and matlab, it might be possible.
cc1000 antenna
I think it is quite difficult. Radio wave will be blocked by cattle unless you have only a cattle in field. You may use planar antenna. We manage to fit it in 4x5 cm PCB. Maximum range may be less than 100 meters due to obstacle from other bovines. It depends on scenario. If...
You can simulate the whole PCB using CST and export the results as a SNP file. You can then use this SNP file to simulate the active circuit with the effect of PCB.
SA636 input matching
From the datasheet Zin = 700+ 3.5pf = 700 - j*121.58 at 374 MHz then use a matching tool such as WinSmith to design a matching network.
http://mrtmag.com/mag/radio_winsmith_computerized_smith/
ad9954 dds
If you need only FSK, you dont need AD8349 I-Q-Modulator. You will need only an upconverter. However, if you still want to use AD8349 I-Q-Modulator, you just need to to connect the output of AD9954 DDS to either I or Q input of AD8349 I-Q-Modulator. They are both differential so you...
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