However, despite having the ability to solve a vast variety of problems, other techniques have shown advantages for certain class of problem. This represents a significant performance advantage compared to non-time domain methods which entail the simulation of a large number of discrete frequencies for the broadband data extraction. The ability to extract a high resolution of broadband antenna data is a result of the time domain solver's ability to define and calculate a large number of farfield monitors in one single simulation run. Thus it is possible to handle large radiating structures and even complete arrays with more than some hundreds of radiating elements. One main advantage of the time domain solver of CST MWS is that the resource requirement only scales linear with the numbers of mesh nodes and therefore the problem size. A large step forward in the area of meshing was introduced by a method called "perfect boundary approximation (PBA)" and it allowed a technique to represent curves and inclines very accurately within a coarse discretization.
CST MICROWAVE STUDIO reg (CST MWS) is based on the finite integration technique (FIT), a very general approach, which describes Maxwell's equations on a grid space and can be written in time domain as well as in frequency domain and is not restricted to a certain grid type. But this won't be same as the actual as there is a ground plane below. Removing the bottom ground plane in my above simulation gave me a 9dB return loss. In this case should I also select this plane as a negative port pin as well? However, I do also get a ground plane underneath of this line. Based on the impedance calculation, the RF feeder width is calculate as considering it as a CPW. I am also bit not clear on applying discrete port positive and negative port pin definitions. In this case should I draw a one big ground plane with the same size as the circuit? I have attached an image of the actual top layer and bottom(Blue - Ground) layer PCB design.Īs you can see, the blue color ground plane is not completely a plane. Is it ok to add the entire ground plane and then add matching network separately? What I wanted is to do a simulation on just the antenna section and then add separate lumped element matching network so that I can match with the impedance of the nRF chip ANT port.
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