JPS6467005A - Mobile communication base station antenna system - Google Patents

Mobile communication base station antenna system

Info

Publication number
JPS6467005A
JPS6467005A JP22469987A JP22469987A JPS6467005A JP S6467005 A JPS6467005 A JP S6467005A JP 22469987 A JP22469987 A JP 22469987A JP 22469987 A JP22469987 A JP 22469987A JP S6467005 A JPS6467005 A JP S6467005A
Authority
JP
Japan
Prior art keywords
reception
received
gain
wave
transmission
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
Application number
JP22469987A
Other languages
Japanese (ja)
Inventor
Masayuki Sakamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTT Inc
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP22469987A priority Critical patent/JPS6467005A/en
Publication of JPS6467005A publication Critical patent/JPS6467005A/en
Pending legal-status Critical Current

Links

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

PURPOSE:To improve the reception gain by a gain of a directivity antenna by inserting a transmission/reception branching filter between the directivity antenna and a hybrid circuit so as to allow the level of a reception wave not to be subjected to attenuation by the hybrid circuit. CONSTITUTION:Transmission-reception branching filters 14-17 are provided and a received wave is received by sector antennas 2-5, branched by the branching filters 14-17 and fed to a selection switching circuit 26. A radio wave from the mobile station is received by the sector antennas 2-5 and the reception levels are not identical, the radio wave is received strongest by the antenna facing the direction of the mobile station and the reception level by the other antennas is low. The selection changeover circuit 26 compares the reception levels of the sector antennas 2-5 and selects the sector antenna receiving the radio wave strongest and leads the received wave to a receiver 27. Thus, the reception gain is higher than the transmission gain by 6dB because the received power does not pass through the hybrid circuit.
JP22469987A 1987-09-07 1987-09-07 Mobile communication base station antenna system Pending JPS6467005A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22469987A JPS6467005A (en) 1987-09-07 1987-09-07 Mobile communication base station antenna system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22469987A JPS6467005A (en) 1987-09-07 1987-09-07 Mobile communication base station antenna system

Publications (1)

Publication Number Publication Date
JPS6467005A true JPS6467005A (en) 1989-03-13

Family

ID=16817856

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22469987A Pending JPS6467005A (en) 1987-09-07 1987-09-07 Mobile communication base station antenna system

Country Status (1)

Country Link
JP (1) JPS6467005A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002069449A1 (en) * 2001-02-26 2002-09-06 Mitsubishi Denki Kabushiki Kaisha Antenna device
WO2021132432A1 (en) * 2019-12-27 2021-07-01 パナソニックＩｐマネジメント株式会社 Estimation system, reception system, control system, estimation method, and program

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5525205A (en) * 1978-08-11 1980-02-22 Nippon Hoso Kyokai <Nhk> Variable directional antenna
JPS59144205A (en) * 1983-02-08 1984-08-18 Nippon Telegr & Teleph Corp <Ntt> Base station antenna for mobile communication system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5525205A (en) * 1978-08-11 1980-02-22 Nippon Hoso Kyokai <Nhk> Variable directional antenna
JPS59144205A (en) * 1983-02-08 1984-08-18 Nippon Telegr & Teleph Corp <Ntt> Base station antenna for mobile communication system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002069449A1 (en) * 2001-02-26 2002-09-06 Mitsubishi Denki Kabushiki Kaisha Antenna device
US6788269B2 (en) 2001-02-26 2004-09-07 Mitsubishi Denki Kabushiki Kaisha Simplified feed circuit for an array antenna device
JP4877697B2 (en) * 2001-02-26 2012-02-15 三菱電機株式会社 Antenna device
WO2021132432A1 (en) * 2019-12-27 2021-07-01 パナソニックＩｐマネジメント株式会社 Estimation system, reception system, control system, estimation method, and program

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