GB2183099A - Aerial - Google Patents

Aerial Download PDF

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Publication number
GB2183099A
GB2183099A GB08524368A GB8524368A GB2183099A GB 2183099 A GB2183099 A GB 2183099A GB 08524368 A GB08524368 A GB 08524368A GB 8524368 A GB8524368 A GB 8524368A GB 2183099 A GB2183099 A GB 2183099A
Authority
GB
United Kingdom
Prior art keywords
aerial
person
members
sleeve
aerials
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
GB08524368A
Other versions
GB8524368D0 (en
GB2183099B (en
Inventor
Reginald Edward Parker
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 GB8524368A priority Critical patent/GB2183099B/en
Publication of GB8524368D0 publication Critical patent/GB8524368D0/en
Publication of GB2183099A publication Critical patent/GB2183099A/en
Application granted granted Critical
Publication of GB2183099B publication Critical patent/GB2183099B/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/44Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/27Adaptation for use in or on movable bodies
    • H01Q1/273Adaptation for carrying or wearing by persons or animals
    • AHUMAN NECESSITIES
    • A41WEARING APPAREL
    • A41DOUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D1/00Garments
    • A41D1/002Garments adapted to accommodate electronic equipment

Landscapes

  • Details Of Aerials (AREA)

Abstract

An aerial for person-carried radio equipment, such as a walkie-talkie, comprises one or two tubular members 2, 3 made of flexible, electrically- conducting, material such as fine phosphor bronze mesh fitted end-to- end within the sleeve 1 of a garment such as a jacket and electrically insulated from one another, and a coaxial electrical connection 4 running inside the upper of the two members with the inner conductor connected to the lower member and the outer conductor to the upper member. The tubular member(s) may be fitted in a trouser leg. <IMAGE>

Description

SPECIFICATION Improvements in or relating to aerials This invention relates to aerials and in particular to aerials for person-carried radio equipment such as walkie-talkies.
Normally such equipment uses a whip aerial, but whip aerials can be inconvenient in confined spaces.
They also make the use of the equipment very conspicuous, which can be a disadvantage.
However, small aerials, or aerials close to a person's body, tend to be narrow-band and/or lossy.
According to the present invention an aerial for person-carried radio equipment comprises a tubular member made of flexible, electrically-conducting, material fitted as a lining within a portion of a garment wearable by the person so that the member encircles a part of the person, and an electrical connection to an end of said member. The part of the person may be a limb.
Preferably the aerial comprises two such members fitted end-to-end within the sleeve of a garment such as a jacket and electrically insulated from one another, electrical connections being made to the adjacent ends so that the members function as a dipole. The electrical connections are preferably the inner and outer conductors of a coaxial cable, and preferably said cable runs inside the upper of the two members past the shoulder of the garment, with the inner conductor connected to the lower member and the outer conductor to the upper member.
The material may be a fine metallic mesh, e.g.
phosphor-bronze mesh such as is used in filters for liquids.
To enable the nature of the present invention to be more readily understood, attention is directed by way of example to the accompanying drawing, which is an elevation of part of a jacket fitted with an aerial embodying the present invention.
In this drawing a sleeve 1 of a jacket contains as a lining two tubular members 2, 3 fitted end-to-end with a small gap between their adjacent ends. The members are of approximately equal length, the upper member 2 extending up to the shoulder line, although the latter is not essential. A coaxial feeder 4 runs inside member 2 past the shoulder and terminates in a suitable small plug or socket (not shown). The outer conductor of feeder 4 is connected to the upper member 2 and the inner conductor to the lower member 3 at their adjacent ends. The members 2 and 3 are made of fine phosphor-bronze mesh.
The aerial thus formed functions as a centre-fed dipole and, by virtue of its relatively large diameter, has a large bandwidth, Moreover, because the feeder runs inside the upper member, the arrangement has some electrical equivalence to a known form of aerial, viz a sleeve aerial, which is advantageous. More importantly, the wearer's conductive arm is inside the aerial in a field-free region and thus degrades its performance much less than would, say, a simple strip or wire extending up the sleeve 1. In one example the aerial was found to have an insertion loss of only 6db as compared with a loss of 20 db for a simple wire dipole located within the sleeve. In fact the loss was similar whether an arm was within the sleeve or not.
Although a dipole configuration is preferred, a monopole configuration is also within the scope of the invention, i.e. using a single continuous member instead of two as shown, with a feeder connected to one end, e.g. preferably the lower end.
The garment may include an aerial as aforesaid within one sleeve only or within both sleeves, the feeders to each being joined together in a known manner.
The associated radio equipment and batteries can be carried inconspicuously in a pocket of the jacket or elsewhere on the person.
Instead of encircling an arm or arms as described and preferred, the aerial or aerials may encircle another part or parts of the body, e.g., as a lining within a trouser leg or legs.
1. An aerial for person-carried radio equipment comprising a tubular member made of flexible, electrically-conducting, material fitted as a lining within a portion of a garment wearable by the person so that the member encircles a part of the person, and an electrical connection to an end of the member.
2. An aerial as claimed in claim 1 wherein the part of the person is a limb.
3. An aerial as claimed in claim 1 or claim 2 comprising two such members fitted end-to-end with the sleeve of a garment such as a jacet and electrically insulated from one another, electrical connections being made to the adjacent ends so that the members function as a dipole.
4. An aerial as claimed in claim 3 wherein the electrical connections are the inner and outer conductors of a coaxial cable.
5. An aerial as claimed in claim 4 wherein the cable runs inside the upper of the two members with the inner conductor connected to the lower member and the outer conductor to the upper member.
6. An aerial as claimed in any preceding claim wherein the member or members are made of fine metallic mesh.
7. An aerial for person-carried radio equipment substantially as hereinbefore described with reference to the accompanying drawing.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Improvements in or relating to aerials This invention relates to aerials and in particular to aerials for person-carried radio equipment such as walkie-talkies. Normally such equipment uses a whip aerial, but whip aerials can be inconvenient in confined spaces. They also make the use of the equipment very conspicuous, which can be a disadvantage. However, small aerials, or aerials close to a person's body, tend to be narrow-band and/or lossy. According to the present invention an aerial for person-carried radio equipment comprises a tubular member made of flexible, electrically-conducting, material fitted as a lining within a portion of a garment wearable by the person so that the member encircles a part of the person, and an electrical connection to an end of said member. The part of the person may be a limb. Preferably the aerial comprises two such members fitted end-to-end within the sleeve of a garment such as a jacket and electrically insulated from one another, electrical connections being made to the adjacent ends so that the members function as a dipole. The electrical connections are preferably the inner and outer conductors of a coaxial cable, and preferably said cable runs inside the upper of the two members past the shoulder of the garment, with the inner conductor connected to the lower member and the outer conductor to the upper member. The material may be a fine metallic mesh, e.g. phosphor-bronze mesh such as is used in filters for liquids. To enable the nature of the present invention to be more readily understood, attention is directed by way of example to the accompanying drawing, which is an elevation of part of a jacket fitted with an aerial embodying the present invention. In this drawing a sleeve 1 of a jacket contains as a lining two tubular members 2, 3 fitted end-to-end with a small gap between their adjacent ends. The members are of approximately equal length, the upper member 2 extending up to the shoulder line, although the latter is not essential. A coaxial feeder 4 runs inside member 2 past the shoulder and terminates in a suitable small plug or socket (not shown). The outer conductor of feeder 4 is connected to the upper member 2 and the inner conductor to the lower member 3 at their adjacent ends. The members 2 and 3 are made of fine phosphor-bronze mesh. The aerial thus formed functions as a centre-fed dipole and, by virtue of its relatively large diameter, has a large bandwidth, Moreover, because the feeder runs inside the upper member, the arrangement has some electrical equivalence to a known form of aerial, viz a sleeve aerial, which is advantageous. More importantly, the wearer's conductive arm is inside the aerial in a field-free region and thus degrades its performance much less than would, say, a simple strip or wire extending up the sleeve 1. In one example the aerial was found to have an insertion loss of only 6db as compared with a loss of 20 db for a simple wire dipole located within the sleeve. In fact the loss was similar whether an arm was within the sleeve or not. Although a dipole configuration is preferred, a monopole configuration is also within the scope of the invention, i.e. using a single continuous member instead of two as shown, with a feeder connected to one end, e.g. preferably the lower end. The garment may include an aerial as aforesaid within one sleeve only or within both sleeves, the feeders to each being joined together in a known manner. The associated radio equipment and batteries can be carried inconspicuously in a pocket of the jacket or elsewhere on the person. Instead of encircling an arm or arms as described and preferred, the aerial or aerials may encircle another part or parts of the body, e.g., as a lining within a trouser leg or legs. CLAIMS
1. An aerial for person-carried radio equipment comprising a tubular member made of flexible, electrically-conducting, material fitted as a lining within a portion of a garment wearable by the person so that the member encircles a part of the person, and an electrical connection to an end of the member.
2. An aerial as claimed in claim 1 wherein the part of the person is a limb.
3. An aerial as claimed in claim 1 or claim 2 comprising two such members fitted end-to-end with the sleeve of a garment such as a jacet and electrically insulated from one another, electrical connections being made to the adjacent ends so that the members function as a dipole.
4. An aerial as claimed in claim 3 wherein the electrical connections are the inner and outer conductors of a coaxial cable.
5. An aerial as claimed in claim 4 wherein the cable runs inside the upper of the two members with the inner conductor connected to the lower member and the outer conductor to the upper member.
6. An aerial as claimed in any preceding claim wherein the member or members are made of fine metallic mesh.
7. An aerial for person-carried radio equipment substantially as hereinbefore described with reference to the accompanying drawing.
GB8524368A 1985-10-02 1985-10-02 Improvements in or relating to aerials Expired GB2183099B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8524368A GB2183099B (en) 1985-10-02 1985-10-02 Improvements in or relating to aerials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8524368A GB2183099B (en) 1985-10-02 1985-10-02 Improvements in or relating to aerials

Publications (3)

Publication Number Publication Date
GB8524368D0 GB8524368D0 (en) 1985-11-06
GB2183099A true GB2183099A (en) 1987-05-28
GB2183099B GB2183099B (en) 1989-09-27

Family

ID=10586107

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8524368A Expired GB2183099B (en) 1985-10-02 1985-10-02 Improvements in or relating to aerials

Country Status (1)

Country Link
GB (1) GB2183099B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997041618A1 (en) * 1996-04-30 1997-11-06 Ab Volvo Elastic antenna element
WO2001039326A1 (en) * 1999-11-26 2001-05-31 Koninklijke Philips Electronics N.V. Improved fabric antenna
WO2001059877A1 (en) * 2000-02-10 2001-08-16 Koninklijke Philips Electronics N.V. Portable device antenna
DE19813704B4 (en) * 1998-03-27 2005-03-10 Rohde & Schwarz Reception antenna for a portable radio paging receiver
EP1593177A2 (en) * 2003-01-17 2005-11-09 The Insitu Group Conductive structures including aircraft antennae and associated methods of formation
WO2008040399A1 (en) * 2006-10-06 2008-04-10 Sony Ericsson Mobile Communications Ab Integrated television antenna for a portable communication device
US8933851B2 (en) 2010-01-27 2015-01-13 Bae Systems Plc Body wearable antenna

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997041618A1 (en) * 1996-04-30 1997-11-06 Ab Volvo Elastic antenna element
US6433748B1 (en) 1996-04-30 2002-08-13 Volvo Car Corporation Elastic antenna element
DE19813704B4 (en) * 1998-03-27 2005-03-10 Rohde & Schwarz Reception antenna for a portable radio paging receiver
WO2001039326A1 (en) * 1999-11-26 2001-05-31 Koninklijke Philips Electronics N.V. Improved fabric antenna
WO2001059877A1 (en) * 2000-02-10 2001-08-16 Koninklijke Philips Electronics N.V. Portable device antenna
US6483469B2 (en) 2000-02-10 2002-11-19 Koninklijke Philips Corporation N.V. Portable device antenna
EP1593177A2 (en) * 2003-01-17 2005-11-09 The Insitu Group Conductive structures including aircraft antennae and associated methods of formation
EP1593177A4 (en) * 2003-01-17 2006-10-04 Insitu Group Conductive structures including aircraft antennae and associated methods of formation
WO2008040399A1 (en) * 2006-10-06 2008-04-10 Sony Ericsson Mobile Communications Ab Integrated television antenna for a portable communication device
US7701398B2 (en) 2006-10-06 2010-04-20 Sony Ericsson Mobile Communications Ab Antenna for portable communication device
US8933851B2 (en) 2010-01-27 2015-01-13 Bae Systems Plc Body wearable antenna

Also Published As

Publication number Publication date
GB8524368D0 (en) 1985-11-06
GB2183099B (en) 1989-09-27

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Legal Events

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