Communications: radio wave antennas – Antennas – Spiral or helical type
Patent
1997-09-09
1999-12-07
Wong, Don
Communications: radio wave antennas
Antennas
Spiral or helical type
343702, 343700MS, 343846, H01Q 124
Patent
active
059991461
ABSTRACT:
A small-sized antenna device in which the conductor length can be reduced without encountering a reduction in gain. The antenna device is constructed by mounting a main antenna unit on a mounting substrate having a transmission line formed on the upper surface of the mounting substrate and also having a ground electrode formed on the back surface. One end of the transmission line is connected to a feeding terminal of the main antenna unit, and the other end of the transmission line is connected to a radio-frequency circuit of a radio communication device in which the antenna device is installed. The ground electrode is grounded.
REFERENCES:
patent: 5134422 (1992-07-01), Auriol
patent: 5541610 (1996-07-01), Imanishi et al.
patent: 5767811 (1998-06-01), Mandai et al.
patent: 5767817 (1998-06-01), Tsuru et al.
Kanba Seiji
Mandai Harufumi
Suesada Tsuyoshi
Tsuru Teruhisa
Clinger James
Murata Manufacturing Co. Ltd.
Wong Don
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