This application note illustrates how CST MICROWAVE STUDIO® (CST MWS), Antenna Magus and Optenni Lab can be used in combination to improve an existing GSM tracking device application. The requirement was to replace an existing “off-the-shelf” antenna on a GSM tracking device with an embedded, integrated antenna in order to reduce manufacturing and component costs. The new antenna had to operate inside the standard GSM 900 and 1800 frequency bands and had to use the existing substrate and metallic layers, without changing the existing circuit layout or the size of the PCB. The new integrated antenna was designed using Antenna Magus in combination with CST MWS to account for unwanted coupling, ensuring that the antenna operated within the desired frequency bands.
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Phase center computations are a very sensitive subject and difficult to measure. The location of the phase center depends upon a couple of parameters such as polarization direction, scan angle direction and aperture width. The device modeled in this application...
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