JPS6477230A - Indoor radio communication system - Google Patents
Indoor radio communication systemInfo
- Publication number
- JPS6477230A JPS6477230A JP33272087A JP33272087A JPS6477230A JP S6477230 A JPS6477230 A JP S6477230A JP 33272087 A JP33272087 A JP 33272087A JP 33272087 A JP33272087 A JP 33272087A JP S6477230 A JPS6477230 A JP S6477230A
- Authority
- JP
- Japan
- Prior art keywords
- antennas
- circularly polarized
- rotation directions
- polarized waves
- indoor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
- Radio Transmission System (AREA)
Abstract
PURPOSE:To improve the quality of communication between indoor antennas and a terminal equipment by arranging plural antennas through a signal line laid in a ceiling in a house so that adjacent indoor antennas transmit and receive circularly polarized waves in opposite rotation directions. CONSTITUTION:Circularly polarized waves in opposite rotation directions are radiated from indoor antennas 3, and circularly polarized waves in corresponding rotation directions are received by circularly polarized wave upward beam antennas 61 and 62 respectively. Since a part of signals received by antennas 61 and 62 is led to a comparator 57 through branch lines 55 and 56, the antenna from which the reception level is higher is discriminated. On the basis of this discrimination result, a controller 54 connects the output of the antenna, from which the reception signal level is higher, to a transmitter-receiver 51.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP33272087A JPS6477230A (en) | 1987-06-15 | 1987-12-28 | Indoor radio communication system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14863787 | 1987-06-15 | ||
JP33272087A JPS6477230A (en) | 1987-06-15 | 1987-12-28 | Indoor radio communication system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6477230A true JPS6477230A (en) | 1989-03-23 |
Family
ID=26478768
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP33272087A Pending JPS6477230A (en) | 1987-06-15 | 1987-12-28 | Indoor radio communication system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6477230A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5155494A (en) * | 1989-12-08 | 1992-10-13 | Larsen Electronics, Inc. | Vehicle antenna system |
US5463405A (en) * | 1994-05-20 | 1995-10-31 | Valor Enterprises, Inc. | Cellular telephone coupling network |
EP0702462A1 (en) * | 1994-09-12 | 1996-03-20 | AT&T Corp. | Wireless communication system using distributed switched antennas |
US5600333A (en) * | 1995-01-26 | 1997-02-04 | Larsen Electronics, Inc. | Active repeater antenna assembly |
US5898408A (en) * | 1995-10-25 | 1999-04-27 | Larsen Electronics, Inc. | Window mounted mobile antenna system using annular ring aperture coupling |
US6172651B1 (en) | 1995-10-25 | 2001-01-09 | Larsen Electronics, Inc. | Dual-band window mounted antenna system for mobile communications |
WO2002095866A1 (en) * | 2001-05-22 | 2002-11-28 | Andrew Corporation | Repeater for radio signals |
US7853978B2 (en) | 2004-04-16 | 2010-12-14 | Endres Thomas J | Remote antenna and local receiver subsystems for receiving data signals carried over analog television |
JP2015039218A (en) * | 2014-10-09 | 2015-02-26 | 株式会社日立製作所 | Polarization angle division diversity radio transmitter, radio receiver, and radio communication system |
US9407349B2 (en) | 2011-03-09 | 2016-08-02 | Hitachi, Ltd. | Polarization-angle-division diversity wireless transmitter, wireless receiver, and wireless communication system |
-
1987
- 1987-12-28 JP JP33272087A patent/JPS6477230A/en active Pending
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5155494A (en) * | 1989-12-08 | 1992-10-13 | Larsen Electronics, Inc. | Vehicle antenna system |
USRE36076E (en) * | 1989-12-08 | 1999-02-02 | Larsen Electronics, Inc. | Vehicle antenna system |
US5463405A (en) * | 1994-05-20 | 1995-10-31 | Valor Enterprises, Inc. | Cellular telephone coupling network |
EP0702462A1 (en) * | 1994-09-12 | 1996-03-20 | AT&T Corp. | Wireless communication system using distributed switched antennas |
US5600333A (en) * | 1995-01-26 | 1997-02-04 | Larsen Electronics, Inc. | Active repeater antenna assembly |
US6172651B1 (en) | 1995-10-25 | 2001-01-09 | Larsen Electronics, Inc. | Dual-band window mounted antenna system for mobile communications |
US5898408A (en) * | 1995-10-25 | 1999-04-27 | Larsen Electronics, Inc. | Window mounted mobile antenna system using annular ring aperture coupling |
WO2002095866A1 (en) * | 2001-05-22 | 2002-11-28 | Andrew Corporation | Repeater for radio signals |
US7027770B2 (en) | 2001-05-22 | 2006-04-11 | Andrew Corporation | Repeater for customer premises |
US7853978B2 (en) | 2004-04-16 | 2010-12-14 | Endres Thomas J | Remote antenna and local receiver subsystems for receiving data signals carried over analog television |
US9407349B2 (en) | 2011-03-09 | 2016-08-02 | Hitachi, Ltd. | Polarization-angle-division diversity wireless transmitter, wireless receiver, and wireless communication system |
US9722687B2 (en) | 2011-03-09 | 2017-08-01 | Hitachi, Ltd. | Polarization-angle-division diversity wireless transmitter, wireless receiver, and wireless communication system |
JP2015039218A (en) * | 2014-10-09 | 2015-02-26 | 株式会社日立製作所 | Polarization angle division diversity radio transmitter, radio receiver, and radio communication system |
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