WO2008088859A3 - Hybrid passive active broadband antenna for a distributed antenna system - Google Patents

Hybrid passive active broadband antenna for a distributed antenna system Download PDF

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Publication number
WO2008088859A3
WO2008088859A3 PCT/US2008/000659 US2008000659W WO2008088859A3 WO 2008088859 A3 WO2008088859 A3 WO 2008088859A3 US 2008000659 W US2008000659 W US 2008000659W WO 2008088859 A3 WO2008088859 A3 WO 2008088859A3
Authority
WO
WIPO (PCT)
Prior art keywords
das
frequency
antenna
signal
frequency band
Prior art date
Application number
PCT/US2008/000659
Other languages
French (fr)
Other versions
WO2008088859A2 (en
Inventor
Yair Oren
Igor Berlin
Ofer Saban
Original Assignee
Mobileaccess Networks Ltd
Yair Oren
Igor Berlin
Ofer Saban
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 Mobileaccess Networks Ltd, Yair Oren, Igor Berlin, Ofer Saban filed Critical Mobileaccess Networks Ltd
Publication of WO2008088859A2 publication Critical patent/WO2008088859A2/en
Publication of WO2008088859A3 publication Critical patent/WO2008088859A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0064—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with separate antennas for the more than one band
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/10—Monitoring; Testing of transmitters
    • H04B17/11—Monitoring; Testing of transmitters for calibration
    • H04B17/12—Monitoring; Testing of transmitters for calibration of transmit antennas, e.g. of the amplitude or phase
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components

Abstract

The invention is directed to a method and system for equalizing the signal losses over cable runs in a Distributed Antenna System (DAS). In a DAS, two or more antennae are connected to the system by cable runs that can vary widely in length. As a result, the signal loss over a given cable run can also vary widely which can impact the design and deployment of the DAS and reduce antenna spacing. In addition, for a broadband DAS that supports many frequency bands or ranges using a common antenna unit, the signal losses vary with respect to frequency further making it difficult to equalize the cable losses. According to one embodiment of the invention, the method and system provide for measuring and adjusting the signal losses of each cable run to be a predefined value. According to another embodiment of the invention, the DAS can include a hybrid passive-active antenna unit for use in a DAS which includes a frequency multiplexer that separates the signal into frequency bands or ranges that are connected to an antenna element associated with a particular frequency band or range. Where a single frequency band needs to be amplified (or attenuated), a single band amplification block (SBAB) can be inserted in the connection between the frequency multiplexer and the antenna element to amplify (or attenuate) the desired frequency band. Where more than one frequency band need to be amplified (or attenuated), a multiband amplification block (MBAB) can be inserted in the connection between the frequency multiplexer and the appropriate antenna element to amplify (or attenuate) the desired frequency bands.
PCT/US2008/000659 2007-01-18 2008-01-18 Hybrid passive active broadband antenna for a distributed antenna system WO2008088859A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US88547007P 2007-01-18 2007-01-18
US60/885,470 2007-01-18

Publications (2)

Publication Number Publication Date
WO2008088859A2 WO2008088859A2 (en) 2008-07-24
WO2008088859A3 true WO2008088859A3 (en) 2008-09-04

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/US2008/000659 WO2008088859A2 (en) 2007-01-18 2008-01-18 Hybrid passive active broadband antenna for a distributed antenna system
PCT/US2008/000663 WO2008088862A1 (en) 2007-01-18 2008-01-18 Method and system for equalizing cable losses in a distributed antenna system

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/US2008/000663 WO2008088862A1 (en) 2007-01-18 2008-01-18 Method and system for equalizing cable losses in a distributed antenna system

Country Status (2)

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US (2) US20080175175A1 (en)
WO (2) WO2008088859A2 (en)

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Also Published As

Publication number Publication date
WO2008088862A1 (en) 2008-07-24
WO2008088859A2 (en) 2008-07-24
US8121646B2 (en) 2012-02-21
US20080175175A1 (en) 2008-07-24
US20080174502A1 (en) 2008-07-24

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