SMALL-SIZED GROUNDED FOLDED ANTENNA DEVICE

摘要

PURPOSE:To obtain a small-sized grounded folded antenna device with high efficiency, narrow grounding area and inexpensive construction cost by connecting a loop antenna in series with the top part of the grounded folded antenna and providing a matching box between the grounded folded antenna and a transmitter. CONSTITUTION:One end of a minute loop antenna 13 is connected to the top part of a supporter 12 built on ground 11 and one end of a lead wire 14 is connected to the other end of said loop antenna 13. The other end of said lead wire 14 is brought down to the ground and the lead wire is connected to the transmitter 16. The supporter 12 and the matching box 15 are connected to an earthing 17 digged in the depth and the supporter 12 is fixed strongly to the ground 11 by means of a guy stub 18. The folded antenna consists of the supporter 12 and the lead wire 14. Thus the small-sized grounded folded antenna device with high efficiency, narrow grounding area and inexpensive construction is obtained.