EP0605182A2
Expired / Lapsed
EP
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Bidirectional repeater for mobile telephone system
Assignee: Individual
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Filing: 1993-12-21
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Granted: —
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Expires: 2013-12-21
Abstract
Abstract A bothway RF repeater for use in a Personal Handy Phone system or in a Personal Communications System (hereinafter refered to as a PHP system or PCS) or in the Digital European Cordless Telephone (DECT). which are operated under the FDMA/TDD or TDMA/TDD or CDMA scheme. includes a "up-stream" coaxial connector to connect a common coaxial cable and/or two mutually isolated coaxial cables and/or an antenna system directed toward a base station, and two mutually isolated amplifiers for amplifying up-link and down-link RF signals, and a control means for ensuring that avoids an undesired self-oscillations caused by an over-coupling between up-link and down-link amplifiers, and the "down-stream" coaxial connectors to connect one or more coaxial cables and/or antenna systems and/or RF radiation cables directed toward the subscribers within the micro-cell serving areas. The control means further includes at least one RF signal detector and a control circuit, which controls the linearity, output level, and/or gain of the said amplifiers. By using the control means, the down-link amplifier gain is increased and the up-link amplifier gain is decreased simultaneously when the detector on the down-link amplifier detects the RF signals which is transmitted from the base station. Moreover, the said bothway RF repeaters are installed within a several stray building, under ground on a top of poles, on an overhead wire cable, and/or on a constructed structures, not only for enhancing the coverage of the base station but also for ensuring the extreamly higher efficiency of channel usage by distributing the combined RF signals from a plurality of the base stations.
Inventors
- 👤 Yoshiro Niki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 10:43
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/14; H04B7/15; H04B7/155; H04B7/15564; H04B7/24; H04B7/26; H04B7/2603; H04B7/2606
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
139 words
For use in a Personal Handy Phone system or in a Personal Communications System or DECT system, a bothway RF repeater for combining and distributing and/or enhancing one or more FDMA/TDD or TDMA/TDD or CDMA carriers, to get a higher efficiency of the frequency usage in a serving area and/or to ensure a good quality of the communications between a base station and a subscriber, the said bothway RF repeater comprising: (a) isolated up-link amplifier and down-link amplifier to amplify RF signals; (b) isolated up-link connector and down-link connector to connect mutually isolated coaxial cables and/or antenna systems and/or RF radiation cables directed toward a base station; and (c) isolated up-link connector and down-link connector to connect mutually isolated coaxial cables and/or RF radiation cables and/or antenna systems directed toward subscribers and/or next stage of the bothway RF repeater.
Claim 2
Dependent Claim
162 words
For use in a Personal Handy Phone system or in a Personal Communications system or DECT system, a bothway RF repeater for combining and distributing and/or enhancing one or more FDMA/TDD or TDMA/TDD or CDMA carriers, to get a higher efficiency of the frequency usage in a serving area and/or to ensure a good quality of the communications between a base station and a subscriber, the said bothway RF repeater comprising: (a) isolated up-link amplifier and down-link amplifier to amplify RF signals; (b) isolated up-link connector and down-link connector to connect mutually isolated coaxial cables and/or antenna systems and/or RF radiation cables directed toward a base station; and (c) one or more combiners and/or dividers to combine and/or divide the said up-link amplifier and down-link amplifier, and to connect one or more "down-stream" antenna systems and/or RF radiation cables directed toward subscribers, and/or one or more common and/or mutually isolated coaxial cables directed toward the next stage of the bothway RF repeaters.
Claim 3
Dependent Claim
145 words
For use in a Personal Handy Phone system or in a Personal Communications Systems or DECT system. a bothway RF repeater for combining and distributing and/or enhancing one or more FDMA/TDD or TDMA/TDD or CDMA carriers, to get a higher efficiency of the frequency usage in a serving area and/or to ensure a good quality of the communications between a base station and a subscriber, the said bothway RF repeater comprising: (a) isolated up-link amplifier and down-link amplifier to amplify RF signals; (b) one or more combiner and/or divider to combine and/or divide the said up-link amplifier and down-link amplifier, and to connect one or more common and/or mutually isolated coaxial cables and/or RF radiation cables directed toward a base station; and (c) isolated up-link connector and down-link connector to connect mutually isolated coaxial cables and/or antenna systems and/or RF radiation cables directed toward subscribers.
Claim 4
Dependent Claim
175 words
For use in a Personal Handy Phone system orin a Personal Communications System or DECT system, a bothway RF repeater for combining and distributing and/or enhancing one or more FDMA/TDD or TDMA/TDD or CDMA carriers, to get a higher efficiency of the frequency usage in a serving area and/or to ensure a good quality of the communications between a base station and a subscriber, the said bothway RF repeater comprising: (a) isolated up-link amplifier and down-link amplifier to amplify RF signals; (b) one or more combiners and/or divider to combine and/or divide the said up-link amplifier and down-link amplifier, and to connect one or more common and/or mutually isolated coaxial cables and/or RF radiation cables directed toward a base station; and (c) one or more combiners and/or dividers to combine and/or divide the said up-link amplifier and down-link amplifier, and to connect one or more "down-stream" antenna systems and/or RF radiation cables directed toward subscribers, and/or one or more common and/or mutually isolated coaxial cables directed toward the next stage of the bothway RF repeaters.
Claim 5
Dependent Claim
66 words
A bothway RF repeater as defined in claim 1, 2. 3 and 4, wherein said amplifiers comprising: (a) isolated up-link amplifier and/or down-link amplifier to amplify RF signals; (b) one or more detectors to detect the RF signal levels and/or modulated signals of the up-link amplifier and/or down-link amplifier; and (c) control means to control the gain and/or linearity and/or output level of the said amplifiers.
Claim 6
Dependent Claim
28 words
A bothway RF repeater as defined in claim 1, 2, 3, 4 and 5, wherein the said amplifiers comprising a straight amplifier and/or a mixer and bandpass filter.
Claim 7
Dependent Claim
37 words
A bothway RF repeater as defined in claim 2, 3 and 4, wherein said divider and/or combiner comprising a circulator, an electronic switch, a multi-branch divider and/or combiner, a hybrid circuit, a directional coupler, and/or equivalent circuits.
Claim 8
Dependent Claim
50 words
A bothway RF repeater as defined in claim 5 wherein: (a) said detector means are set on the input stage, middle stage, and/or output stage of the amplifiers; and (b) said control means at least control the output level of the down-link amplifier and/or the gain of the up-link amplifier.
Claim 9
Dependent Claim
112 words
A bothway RF repeater as defined in claim 1, 2. 3 or 4, wherein said antenna systems comprising an unti-standing-wave RF reception means which has a ground plane and/or refrector and a radiating element and/or slot, and further comprising; (a) an array antenna with refrector; or (b) a parabolic antenna or a corner refrector antenna; or (c) other type of antenna which has a ground plane and/or refrector; or (d) a RF radiation coaxial cable (or leaky coaxial cable) and/or a RF radiation wave guide and/or similar structures which have an outer (ground) conductor and radiating slots; or (e) a RF radiation cable which has an inner (ground) conductor and radiating surfaces.
Claim 10
Dependent Claim
62 words
A bothway RF repeater as defined in claim 1. 2. 3 or 4, wherein the coaxial cables. antena systems and/or RF radiation cables comprising; (a) the RF transmission and/or radiation/reception means which constitute the RF radiating/receiving elements and/or slots consecutively and/or intermittently in a line; and/or (b) the RF transmission and/or radiation/reception means which are mutually isolated between up-link and down-link circuits.
Claim 11
Dependent Claim
62 words
A bothway RF repeater as defined in claim 1, 2. 3 and 4, wherein said base staion comprising; (a) one or more transmitters and receivers operated in the FDMA/TDD or TDMA/TDD(Frequency Division Multiple Access or Time Division Multiple Access/Time Division Duplex) or CDMA(Code Division Multiple Access) scheme; and (b) combiner and/or divider to combine and/or divide one or more tansmitters and/or receivers.
Claim 12
Dependent Claim
95 words
A bothway RF repeater as defined in claim 1. 2, 3 and 4, wherein said bothway RF repeaters are: (a) installed within a building, under ground. on a top of the pole, on an overhead wire cable. and/or on a constructed structure; and/or (b) connected toward a base station in series and/or in parallel through coaxial cables and/or RF radiation cables; and/or (c) supplied the electric power through the inner conductor and/or outer conductor of said coaxial cables and/or RF radiation cables. (d) composed with the CATV signals and/or other signals through RF transmission cables.
References Cited (Backward Citations)
No citation records indexed.
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