Mobile Antennas

Electromagnetic modeling of antennas mounted on mobile devices such as cell phones, tablets, laptops, and others can be done efficiently in Wave3D solver. Such simulations often involve antennas of complex geometrical configurations which are within one wavelength in size. Computationally intensive models arising due to geometrical complexity of the designs is handled efficiently in Wave3D thanks to its broadband MLFMA acceleration of the Moment Method solution. Capabilities of Wave3D for modeling of mobile antennas mounted on complex platforms are demonstrated in the figures below for the example of Apple iPhone4 GSM antenna radiation modeling at 1.9GHz.


Fig. 1: Disassembled iPhone4 device (left) and its CAD model (left)  featuring key components important for accurate predictions of its GSM antenna radiation. The model includes metal body of the phone, GSM microstrip antenna printed on the speaker box, back cover, and front cover of the phone including the screen.


Fig. 2: iPhone4 CAD model build for prediction of GSM antenna radiation. The model is discretized with 86,933 triangle and 253,439 tetrahedral elements (left). The radiation patterns of the antenna and distribution of the currents on the surface of the phone (center and left) calculated by Wave3D.


Fig. 3: Visualization in ParaView of vector current distribution and its magnitude on the radiating element of the GSM antenna (left), near H-field distribution in the cross-sectional slice (left), magnitude of E-field in the dielectric material of the speaker box on which antenna is printed (center), and the distribution of the E-field vectors in the speaker box produced by the GSM antenna. All results correspond to the snapshot at time t=0s of time-harmonic field at the frequency of 1.9GHz.