Before revision: From a point of view of classical electrodynamics, the performance of two-dimensional shape-simplified antennaeis discussed based upon the shape of naturally designed systems to harvest light . We explain the reason that the function of the notch at the complex, the function of the PufX presented at the notch, the function of the special pair, the bacteriochlorophylls are dielectric instead of conductor, and a mechanism to prevent damages from excess sunlight.
After revision: Most of our current understanding of mechanisms of photosynthesis comes from spectroscopy. However, classical definition of radio-antenna can be extended to optical regime to discuss the function of light-harvesting antennae. Further to our previously proposed model of a loop antenna we provide several more physical explanations on considering the non-reciprocal properties of the light harvesters of bacteria. We explained the function of the notch at the complex, the function of the PufX presented at the notch, the function of the special pair, the bacteriochlorophylls are dielectric instead of conductor, and a mechanism to prevent damages from excess sunlight.