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:
Feb. 19, 2019
Filed:
Mar. 25, 2016
Mitsubishi Electric Corporation, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
A distributed antenna system includes a plurality of first antenna groups and a plurality of second antenna groups. The first antenna groups include a plurality of first antennas which forms beams in a first direction along a mobile station track and transmits identical signals at identical frequencies. The second antenna groups include a plurality of second antennas which forms beams in a second direction and transmits identical signals at identical frequencies. The first antennas and the second antennas are installed to face each other across the mobile station track. Each of the first antenna groups uses a frequency different from a frequency used in another first antenna group adjacent thereto, each of the second antenna groups uses a frequency different from a frequency used in another second antenna group adjacent thereto, and two frequencies are used by the first antenna groups and the second antenna groups in total.