Considerations on an Inland Rectenna KIYOHIKO ITOH & YASUTAKA OGAWA Summary An earth terminal ‘rectenna' is one of the essential elements of a solar potver satellite system. This paper describes several considerations on an inland rectenna. First, we show that an inland rectenna has advantages over an offshore one. Then we describe the inland rectenna and an associated artificial city. Moreover, the hogline rectenna and modified hogline rectenna with circular microstrip antennae are discussed, and several expressions are obtained which will be useful for designing the hogline type rectenna. Introduction A ‘rectenna', the earth station terminal in the solar power satellite (SPS) system, converts the microwave power transmitted from an SPS into DC [1]. The rectenna is one of the essential elements in an SPS system. The rectenna may be constructed either inland or offshore. From the viewpoint of energy transmission, the inland rectenna has advantages over an offshore one. Furthermore, the offshore rectenna is undesirable because it must take measures to cope with salt, icing and sea birds [2]. On the other hand, the Raytheon Company has developed or discussed dipole antennae with a ground plane and Yagi-Uda antennae for the rectenna [3]. The authors have proposed a circular microstrip antenna (CMSA) which has the advantage of harmonic wave suppression and reliability [4], [5]. This paper describes several concerns relating to an inland rectenna using a CMSA. First, the inland rectenna site will be outlined. Then, the hogline rectenna and modified rectenna using a CMSA will be discussed. Inland Rectenna An example of an inland rectenna site is shown in Fig. 1. We may construct an all- weather artificial city under the rectenna. The diameter of the rectenna is about 10 km and the urban area is about 64 km2 inside the rectenna. The population of the city is K. Itoh and Y. Ogawa, Department of Electronic Engineering, Faculty of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo 060, Japan. Note: Minor editorial changes were made solely for stylistic and grammatical reasons. Any errors which crept in during this process are solely the fault of the Editor. The original version of the paper was presented at the Sixth ISAS Space Energy Symposium, 12 and 13 March 1987.
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