The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 23, 1983
Filed:
Jun. 02, 1981
Applicant:
Inventors:
Takayasu Shiokawa, Tokyo, JP;
Yoshio Karasawa, Tokyo, JP;
Assignee:
Kokusai Denshin Denwa Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01G / ;
U.S. Cl.
CPC ...
343895 ;
Abstract
A compact and light weight array antenna with a gain of approximately 13 dB comprises a plurality of axial-mode helical antennas with an antenna height of 0.4.about.0.6.lambda. (.lambda.: Wavelength) as element antennas, having cylindrical metallic rims with a rim height of approximately 0.25.lambda. surrounding each corresponding element antenna in order to suppress the characteristic degradation of the device caused by the mutual coupling of element antennas.