WO2007136747A3 - Closely coupled antennas for supergain and diversity - Google Patents

Closely coupled antennas for supergain and diversity Download PDF

Info

Publication number
WO2007136747A3
WO2007136747A3 PCT/US2007/011902 US2007011902W WO2007136747A3 WO 2007136747 A3 WO2007136747 A3 WO 2007136747A3 US 2007011902 W US2007011902 W US 2007011902W WO 2007136747 A3 WO2007136747 A3 WO 2007136747A3
Authority
WO
WIPO (PCT)
Prior art keywords
closely coupled
antennas
modes
dipole
multipoles
Prior art date
Application number
PCT/US2007/011902
Other languages
French (fr)
Other versions
WO2007136747A2 (en
Inventor
Yuanxun Ethan Wang
Original Assignee
Univ California
Yuanxun Ethan Wang
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 Univ California, Yuanxun Ethan Wang filed Critical Univ California
Publication of WO2007136747A2 publication Critical patent/WO2007136747A2/en
Publication of WO2007136747A3 publication Critical patent/WO2007136747A3/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/02—Antennas or antenna systems providing at least two radiating patterns providing sum and difference patterns
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas
    • 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
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
    • 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
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
    • H01Q9/285—Planar dipole
    • 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

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

Parallel information channels are discovered on dipole antennas closely coupled to each other. There channels are supported by different radiation modes in the form of multipoles or combination of multipoles. The spacing between antennas only impacts the radiation impedances of the higher order modes. Through a multiport impedance matching network, these modes can be separated into different driving ports and matched individually. This finding can lead to practical superdirective arrays for beamforming and superdiverse antennas for MIMO applications. A pair of closely coupled dipole antennas is used as an example to illustrate this concept. Analysis has shown, with a pair of half-wave dipoles at 0.1 λ spacing, double of the channel capacity resulted from the diversity increase and more than 3 times of the gain and directivity of a single half-wave dipole can be achieved. The theory can be extended for a large number of closely coupled antenna elements.
PCT/US2007/011902 2006-05-18 2007-05-17 Closely coupled antennas for supergain and diversity WO2007136747A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US80163506P 2006-05-18 2006-05-18
US60/801,635 2006-05-18

Publications (2)

Publication Number Publication Date
WO2007136747A2 WO2007136747A2 (en) 2007-11-29
WO2007136747A3 true WO2007136747A3 (en) 2008-10-16

Family

ID=38723853

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/011902 WO2007136747A2 (en) 2006-05-18 2007-05-17 Closely coupled antennas for supergain and diversity

Country Status (1)

Country Link
WO (1) WO2007136747A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2769439A1 (en) * 2011-10-23 2014-08-27 Option NV Wireless antenna system
US8912943B2 (en) 2011-12-05 2014-12-16 AMI Research & Development, LLC Near field subwavelength focusing synthetic aperture radar with chemical detection mode
GB2517221A (en) * 2013-06-17 2015-02-18 Option Nv Tunable antenna systems
CN103412974A (en) * 2013-07-11 2013-11-27 武汉大学 Method for calculating channel capacity of sparse microwave imaging radar system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0108816A1 (en) * 1982-10-22 1984-05-23 International Standard Electric Corporation A field component diversity antenna arrangement
US20050259005A1 (en) * 2004-05-20 2005-11-24 Interdigital Technology Corporation Beam forming matrix-fed circular array system
US20050266902A1 (en) * 2002-07-11 2005-12-01 Khatri Bhavin S Multiple transmission channel wireless communication systems

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0108816A1 (en) * 1982-10-22 1984-05-23 International Standard Electric Corporation A field component diversity antenna arrangement
US20050266902A1 (en) * 2002-07-11 2005-12-01 Khatri Bhavin S Multiple transmission channel wireless communication systems
US20050259005A1 (en) * 2004-05-20 2005-11-24 Interdigital Technology Corporation Beam forming matrix-fed circular array system

Also Published As

Publication number Publication date
WO2007136747A2 (en) 2007-11-29

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