Forward Scattering of Loaded and Unloaded Antennas

作者：Gustafsson Mats^*; Andersen Jorgen Bach; Kristensson Gerhard; Pedersen Gert Frolund

来源：IEEE Transactions on Antennas and Propagation, 2012, 60(12): 5663-5668.

DOI：10.1109/TAP.2012.2214191

• Absorption efficiency
• polarizability
• scattering
• sum rule

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.

• 出版日期2012-12