EP 0877440 A1 19981111 - Directivity varying type diversity antenna apparatus
Title (en)
Directivity varying type diversity antenna apparatus
Title (de)
Antennendiversity mit veränderbarer Richtcharakteristik
Title (fr)
Antenne à diversité à directivité variable
Publication
Application
Priority
JP 11822397 A 19970508
Abstract (en)
A directivity varying type diversity antenna apparatus of the present invention includes a plurality of nondirectional antenna elements (11 to 1n) arranged at regular intervals, a receiving antenna determination means (20) for determining a diversity receiving antenna (A1 to A4) by selecting antenna elements (11 to 1n), arranged in specific positions, from among the plurality of nondirectional antenna elements and combining the selected antenna elements, a phase control means (30) for controlling a relationship in phase between RF signals of radio waves received by the diversity receiving antenna (A1 to A4) determined by the receiving antenna determination means (20), a diversity processing means (50) for diversity-processing the RF signals whose phases are controlled and supplying the diversity-processed RF signals to a tuner (60), and a directivity varying control means (70) for properly performing an operation of directivity based on information indicative of receiving conditions, supplying a first instruction signal (S2) for changing an antenna element to the receiving antenna determination means (20) and supplying a second instruction signal (S3) for changing the relationship in phase between the RF signals to the phase control means (30) in accordance with a result of the operation. <IMAGE>
IPC 1-7
IPC 8 full level
H01Q 3/24 (2006.01); H01Q 1/12 (2006.01); H01Q 1/32 (2006.01); H01Q 3/26 (2006.01); H01Q 3/34 (2006.01); H04B 7/08 (2006.01); H04B 7/10 (2006.01)
CPC (source: EP)
H01Q 1/1271 (2013.01); H01Q 3/2605 (2013.01)
Citation (search report)
- [XY] DE 4321805 A1 19940127 - NIPPON SHEET GLASS CO LTD [JP]
- [Y] DE 3521732 A1 19860102 - ASAHI GLASS CO LTD [JP], et al
- [A] BOCHMANN H: "VIER ANTENNEN AN EINEM EMPFAENGER", FUNKSCHAU, vol. 64, no. 1, 27 December 1991 (1991-12-27), pages 66 - 70, XP000279000
- [A] LINDENMEIER H K ET AL: "ANTENNA AND DIVERSITY TECHNIQUES FOR BROADCAST RECEPTION IN VEHICLES", PROCEEDINGS OF THE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM (APSIS), CHICAGO, JULY 20 - 24, 1992, vol. VOL. 2, no. -, 20 July 1992 (1992-07-20), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 1097 - 1100, XP000342287
Designated contracting state (EPC)
DE ES FR GB IT NL SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 98303451 A 19980501; JP 11822397 A 19970508