LOOP ANTENNA, LOOP ANTENNA SYSTEM AND RADIO COMMUNICATION SYSTEM

摘要

PURPOSE: To improve the reliability and the degree of freedom. CONSTITUTION: A linear conductor is bent to form a loop antenna with up-and- down inclined segments in its plane. An embodiment comprises a long straight part LP approximately straightly long extending in the arrow-marked direction X, a short straight part TP1 extending shorter than the LP with a specified angle &thgr;1 of inclination to the LP, and a short straight part TP2 having approximately the same length as the TP1 with a specified angle &thgr;2 of inclination to the LP and a specified angle &thgr;3 of inclination to the TP1. Acute angular parts TG2, TG3, TG4 having approximately the same shape as an acute angular part TG1 defined by the short straight parts TP1, TP2 may serially continue near to a feed point P2 in the opposite direction to the arrow mark X.