GB2277649A - RF antenna switch and method of operating the same - Google Patents

RF antenna switch and method of operating the same

Info

Publication number
GB2277649A
GB2277649A GB9413972A GB9413972A GB2277649A GB 2277649 A GB2277649 A GB 2277649A GB 9413972 A GB9413972 A GB 9413972A GB 9413972 A GB9413972 A GB 9413972A GB 2277649 A GB2277649 A GB 2277649A
Authority
GB
United Kingdom
Prior art keywords
mixer
antenna
coupled
operating
antenna switch
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.)
Granted
Application number
GB9413972A
Other versions
GB9413972D0 (en
GB2277649B (en
Inventor
Louis J Vannatta
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.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Priority claimed from PCT/US1993/011494 external-priority patent/WO1994015408A1/en
Publication of GB9413972D0 publication Critical patent/GB9413972D0/en
Publication of GB2277649A publication Critical patent/GB2277649A/en
Application granted granted Critical
Publication of GB2277649B publication Critical patent/GB2277649B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
    • H04B7/0817—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with multiple receivers and antenna path selection
    • 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
    • H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
    • H04B7/0817—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with multiple receivers and antenna path selection
    • H04B7/082—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with multiple receivers and antenna path selection selecting best antenna path

Abstract

A radio frequency (RF) antenna switch (136) and associated method of operating the same is provided for switching between a first antenna (109) and asecond antenna (111). A first mixer (125) has an input terminal (124) coupled to the first antenna (109) and has an output terminal (126). A second mixer (129) has an input terminal (128) coupled to the second antenna (11) and has an output terminal (130) coupled to the output terminal of the first mixer (125). The first mixer (125) and the second mixer (129) are alternatively enabled responsive to the state of an antenna select signal (141). Additionally, the common output terminals (126, 130) of both the first mixer (125) and the second mixer (129) are matched to a first intermediate frequency stage (131). The RF antenna switch (136) advantageously provides low loss and low current drain. <IMAGE>
GB9413972A 1992-12-22 1993-11-26 RF antenna switch and method of operating the same Expired - Fee Related GB2277649B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US99727592A 1992-12-22 1992-12-22
PCT/US1993/011494 WO1994015408A1 (en) 1992-12-22 1993-11-26 Rf antenna switch and method of operating the same

Publications (3)

Publication Number Publication Date
GB9413972D0 GB9413972D0 (en) 1994-08-31
GB2277649A true GB2277649A (en) 1994-11-02
GB2277649B GB2277649B (en) 1997-04-02

Family

ID=26787137

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9413972A Expired - Fee Related GB2277649B (en) 1992-12-22 1993-11-26 RF antenna switch and method of operating the same

Country Status (1)

Country Link
GB (1) GB2277649B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2327572A (en) * 1997-07-22 1999-01-27 Matsushita Communication Ind Telephone with multiple antenna comfiguration for reduced user irradiation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4418428A (en) * 1982-03-30 1983-11-29 Rca Corporation Tuning system for a multi-band television receiver
US4596045A (en) * 1983-05-19 1986-06-17 Deutsche Thomson-Brandt Gmbh Input circuit for television receiver
US4914714A (en) * 1986-08-30 1990-04-03 Nec Corporation Portable radio communication apparatus having diversity reception function

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0247931A (en) * 1988-08-09 1990-02-16 Nec Corp Tuner circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4418428A (en) * 1982-03-30 1983-11-29 Rca Corporation Tuning system for a multi-band television receiver
US4596045A (en) * 1983-05-19 1986-06-17 Deutsche Thomson-Brandt Gmbh Input circuit for television receiver
US4914714A (en) * 1986-08-30 1990-04-03 Nec Corporation Portable radio communication apparatus having diversity reception function

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2327572A (en) * 1997-07-22 1999-01-27 Matsushita Communication Ind Telephone with multiple antenna comfiguration for reduced user irradiation
GB2327572B (en) * 1997-07-22 1999-06-02 Matsushita Communication Ind Telephone with multiple antenna configuration

Also Published As

Publication number Publication date
GB9413972D0 (en) 1994-08-31
GB2277649B (en) 1997-04-02

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20081126