Gustafsson, Mats5; Andersen, Jørgen Bach1; Kristensson, Gerhard5; Pedersen, Gert Frølund1
1 Antennas, propagation and radio networking, The Technical Faculty of IT and Design, Aalborg University, VBN2 Department of Electronic Systems, The Technical Faculty of IT and Design, Aalborg University, VBN3 The Faculty of Engineering and Science (TECH), Aalborg University, VBN4 Lund University5 Lund University
Forward scattering of antennas is related to antenna performance via the forward-scattering sum rule. The forward-scattering sum rule is an integral identity that shows that a weighted integral of the extinction cross section over all spectrum is proportional to the static polarizability of the antenna structure. Here, the forward-scattering sum rule is experimentally verified for loaded, short-circuit, and open-circuit cylindrical dipole antennas. It is also shown that the absorption efficiency cannot be greater than 1/2 for reciprocal linearly polarized lossless matched antennas with a symmetric radiation pattern in the forward and backward directions.
I E E E Transactions on Antennas and Propagation, 2012, p. 5663-5668