A population of aged-persons is increasing in the world, because of the advance of medical techniques and decrease in birth rate. A number of the aged-persons, who are suffering from senile dementia, are not able to recognize one's location or time. Using the proposed system, the aged-persons' family and co-workers are able to know the location of the aged-person, if the person strays on a street. In this system, Personal Handy-phone System (PHS) is applied to track the aged-person. The relay stations of PHS are located at several places. For example, the stations are located on top of a telephone box on a street, each floor and each top of a building, at a subway station and so on. So, it is able to track the aged-person and to apply the PHS for detecting. In this paper, the signal intensity distribution of handy electronic marker of the system is analyzed.
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