A time-switched reflector array

The ideal of time switched/modulated array has been introduction to add a new parameter to antenna array factor equations. As known to all, using periodical switching or modulating signal can generate harmonics onto fundamental carrier. A mathematical approach to explain it is Fourier series. In old time, harmonics are bad. Scientist nowadays try to persuade these bad boys to do good things. Using different switching sequences, a time switched array can mimic the beam scanning function of phased array or generate low sidelobe power pattern.

 A time-switched reflector array is a reconfigurable reflector array which using periodical switching sequence to control elements.


You can find the full paper on:

Yang Wang; Tennant, A.; , "Time-modulated reflector array," Electronics Letters , vol.48, no.16, pp.972-974, August 2 2012

IEEE XPLORE LINK

For further analysis, please be free to contact me: yang.wang@sheffield.ac.uk

Fig. 1 Front view of time modulated reflector array: 8 pin-diode loaded dipole reflector array.

Fig. 2 Time switching sequence: elements are energised sequentially and progressively with 1/8 of cycle

Fig. 3 An ideal scattering pattern of time modulated reflector array from isotropic element: fundamental and first positive and negative harmonics

Fig. 4 A scattering pattern of time modulated reflector array predicted from dipole array:fundamental and first positive and negative harmonics