CA2226437A1 - Antenna system having directivity for elongate service zone - Google Patents

Antenna system having directivity for elongate service zone

Info

Publication number
CA2226437A1
CA2226437A1 CA2226437A CA2226437A CA2226437A1 CA 2226437 A1 CA2226437 A1 CA 2226437A1 CA 2226437 A CA2226437 A CA 2226437A CA 2226437 A CA2226437 A CA 2226437A CA 2226437 A1 CA2226437 A1 CA 2226437A1
Authority
CA
Canada
Prior art keywords
reflector
antenna system
radiator element
directivity
space
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
CA2226437A
Other languages
French (fr)
Other versions
CA2226437C (en
Inventor
Shuguang Chen
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Publication of CA2226437A1 publication Critical patent/CA2226437A1/en
Application granted granted Critical
Publication of CA2226437C publication Critical patent/CA2226437C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
    • H01Q19/104—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces using a substantially flat reflector for deflecting the radiated beam, e.g. periscopic antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14—Reflecting surfaces; Equivalent structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/32—Vertical arrangement of element
    • H01Q9/38—Vertical arrangement of element with counterpoise

Abstract

An antenna system is adapted to be installed on a ceiling surface or on one of side wall surfaces of a space defined by the ceiling surface, the side wall surfaces and a floor surface. The antenna includes a reflector and a radiator element. The reflector has a grounded plate, a dielectric layer formed on the grounded plate, and metal strips having patterns parallel to the longitudinal direction of the space and formed on the dielectric layer. The radiator element is disposed to be perpendicular to a reflecting surface of the reflector. The radiator element may be in a bar form, a cylindrical form or at least partly a coil form. The distance between the center of the longitudinal direction of the radiator element and the reflector is set to be about 0.1 to 0.6 times the wavelength of the working frequency. The antenna system has high directivity along an elongate space such as a tunnel, a corridor or an underground shopping area.
CA002226437A 1997-01-08 1998-01-07 Antenna system having directivity for elongate service zone Expired - Fee Related CA2226437C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP001003/1997 1997-01-08
JP9001003A JP2998669B2 (en) 1997-01-08 1997-01-08 Antenna device

Publications (2)

Publication Number Publication Date
CA2226437A1 true CA2226437A1 (en) 1998-07-08
CA2226437C CA2226437C (en) 2000-10-17

Family

ID=11489416

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002226437A Expired - Fee Related CA2226437C (en) 1997-01-08 1998-01-07 Antenna system having directivity for elongate service zone

Country Status (4)

Country Link
US (1) US5923301A (en)
EP (1) EP0853351A3 (en)
JP (1) JP2998669B2 (en)
CA (1) CA2226437C (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69838364T2 (en) 1997-06-20 2008-05-29 Hitachi Kokusai Electric Inc. Read / write device, power supply system and communication system
US6711122B1 (en) * 1999-02-08 2004-03-23 Radiolan, Inc. Frequency offset differential pulse position modulation
SG107583A1 (en) * 2002-03-27 2004-12-29 Inst Of High Performance Compu Cylindrical fresnel zone antenna with reflective ground plate
FR2852740A1 (en) * 2003-03-18 2004-09-24 France Telecom RADIO TERMINAL AND METHOD FOR RADIO CONNECTION BETWEEN SUCH TERMINAL AND A PORTABLE TERMINAL.
JP4572922B2 (en) * 2007-10-16 2010-11-04 株式会社日本自動車部品総合研究所 Antenna system and in-vehicle wireless communication device
EP3369136B1 (en) * 2015-10-30 2021-06-23 Lutron Technology Company LLC Dual antenna wireless communication device in a load control system
USD806800S1 (en) * 2015-12-02 2018-01-02 Target Brands, Inc. Mounting hardware
CN110034400A (en) * 2018-01-05 2019-07-19 台达电子工业股份有限公司 Antenna assembly and antenna system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4114163A (en) * 1976-12-06 1978-09-12 The United States Of America As Represented By The Secretary Of The Army L-band radar antenna array
JPS59114906A (en) * 1982-12-21 1984-07-03 Mitsubishi Electric Corp Antenna device
JPS61214805A (en) * 1985-03-20 1986-09-24 Fujitsu Ltd Microwave antenna system
FR2627330B1 (en) * 1988-02-12 1990-11-30 Alcatel Espace MULTI-FREQUENCY ANTENNA, ESPECIALLY FOR USE IN THE FIELD OF SPATIAL TELECOMMUNICATIONS
FR2640431B1 (en) * 1988-12-08 1991-05-10 Alcatel Espace MULTI-FREQUENCY RADIANT DEVICE
JP3339661B2 (en) * 1994-08-08 2002-10-28 日本電信電話株式会社 Wireless base station antenna

Also Published As

Publication number Publication date
JPH10200323A (en) 1998-07-31
EP0853351A3 (en) 2000-07-05
JP2998669B2 (en) 2000-01-11
CA2226437C (en) 2000-10-17
EP0853351A2 (en) 1998-07-15
US5923301A (en) 1999-07-13

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed