Communications: radio wave antennas – Antennas – With lumped reactance for loading antenna
Patent
1992-11-09
1994-11-22
Hajec, Donald
Communications: radio wave antennas
Antennas
With lumped reactance for loading antenna
343702, 343846, H01Q 930
Patent
active
053673115
ABSTRACT:
The antenna of the present invention includes an ultrashort antenna element which has an electrical length of lambda/2, a transmission path one end of which is connected to the base of the antenna element, a ground plane obtained from a sheet-form conductive member with an electrical length of lambda/4 which is bent into a U-shape so that first and second portions face each other with the first portion being installed parallel to the transmission path in close proximity to the transmission path so as to create a capacitive coupling with the transmission path, a capacitive coupling member installed at one end of the first portion so that a capacitive coupling is formed between the capacitive coupling member and ground and a coaxial cable with its central conductor connected to an other end of the transmission path and its outer conductor connected to one end of the second portion of the ground plane.
REFERENCES:
patent: 4571595 (1986-02-01), Phillips et al.
patent: 4931806 (1990-06-01), Wunderlich
patent: 5184143 (1993-02-01), Marko
Egashira Yoshimi
Xu Hai
Hajec Donald
Harada Kogyo Kabushiki Kaisha
Ho Tan
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