GB2013037A - Radio antennae - Google Patents

Radio antennae

Info

Publication number
GB2013037A
GB2013037A GB7848736A GB7848736A GB2013037A GB 2013037 A GB2013037 A GB 2013037A GB 7848736 A GB7848736 A GB 7848736A GB 7848736 A GB7848736 A GB 7848736A GB 2013037 A GB2013037 A GB 2013037A
Authority
GB
United Kingdom
Prior art keywords
antenna
magnetic permeability
substantially greater
relative magnetic
relative
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
GB7848736A
Other versions
GB2013037B (en
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.)
UK Secretary of State for Defence
Original Assignee
UK Secretary of State for Defence
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 UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Priority to GB7848736A priority Critical patent/GB2013037B/en
Publication of GB2013037A publication Critical patent/GB2013037A/en
Application granted granted Critical
Publication of GB2013037B publication Critical patent/GB2013037B/en
Expired 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
    • H01Q19/06—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 refracting or diffracting devices, e.g. lens
    • H01Q19/09—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 refracting or diffracting devices, e.g. lens wherein the primary active element is coated with or embedded in a dielectric or magnetic material

Landscapes

  • Details Of Aerials (AREA)

Abstract

The disclosure describes how the physical height of an antenna, typically an HF or VHF wire monopole antenna can be reduced in relation to its electrical length by means of a thin cladding of dielectric material having a relative magnetic permeability substantially greater than unity, eg ferrite. By selecting a material having a relative magnetic permeability substantially greater than its relative dielectric permittivity, a given reduction in antenna height can be achieved with a much thinner cladding than can be achieved using conventional dielectric materials.
GB7848736A 1977-12-20 1978-12-15 Radio antennae Expired GB2013037B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7848736A GB2013037B (en) 1977-12-20 1978-12-15 Radio antennae

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB5303977 1977-12-20
GB7848736A GB2013037B (en) 1977-12-20 1978-12-15 Radio antennae

Publications (2)

Publication Number Publication Date
GB2013037A true GB2013037A (en) 1979-08-01
GB2013037B GB2013037B (en) 1982-06-30

Family

ID=26267182

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7848736A Expired GB2013037B (en) 1977-12-20 1978-12-15 Radio antennae

Country Status (1)

Country Link
GB (1) GB2013037B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0778633A1 (en) * 1995-12-08 1997-06-11 Murata Manufacturing Co., Ltd. Chip antenna having dielectric and magnetic material portions

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0778633A1 (en) * 1995-12-08 1997-06-11 Murata Manufacturing Co., Ltd. Chip antenna having dielectric and magnetic material portions
US5870065A (en) * 1995-12-08 1999-02-09 Murata Mfg Co. Ltd. Chip antenna having dielectric and magnetic material portions

Also Published As

Publication number Publication date
GB2013037B (en) 1982-06-30

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee