JP2000269714A - Antenna device for portable radio equipment - Google Patents
Antenna device for portable radio equipmentInfo
- Publication number
- JP2000269714A JP2000269714A JP11067196A JP6719699A JP2000269714A JP 2000269714 A JP2000269714 A JP 2000269714A JP 11067196 A JP11067196 A JP 11067196A JP 6719699 A JP6719699 A JP 6719699A JP 2000269714 A JP2000269714 A JP 2000269714A
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- coil
- wireless device
- tip
- housing
- 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.)
- Pending
Links
Classifications
-
- 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
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
- H01Q1/244—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas extendable from a housing along a given path
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Support Of Aerials (AREA)
- Details Of Aerials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は移動通信に関し、特
に携帯無線機のアンテナ装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to mobile communication, and more particularly to an antenna device for a portable radio.
【０００２】[0002]
【従来の技術】従来、携帯無線機におけるアンテナ装置
は、直線状（棒状）のアンテナの上方先端部にコイルア
ンテナを設けたホイップアンテナを用い、移動中など必
要が無い場合には無線機筐体内に収納し、通信の必要に
応じて筐体外に引き出し、直線状アンテナとコイルアン
テナを使い分ける場合が多い（例えば特開平８−８４０
１７号公報参照）。2. Description of the Related Art Conventionally, an antenna device for a portable radio uses a whip antenna provided with a coil antenna at an upper end of a linear (rod) antenna. In many cases, a linear antenna and a coil antenna are used separately (for example, see Japanese Patent Application Laid-Open No. 8-840).
No. 17).
【０００３】図４（ａ）（ｂ）はその１例を示すもの
で、（ａ）はホイップアンテナを無線機筐体外に引き出
した状態を、（ｂ）は同アンテナを筐体内に収納した状
態を示している。ホイップアンテナ引出し時には、図４
（ａ）に示すように無線入出力部整合回路は給電接点５
を経て直線状アンテナ３の下端部３３に接続され、直線
状アンテナ３に給電されるが、樹脂部２を介するコイル
アンテナ１０には給電されない。またホイップアンテナ
収納時には、図４（ｂ）に示すように、直線状アンテナ
３は筐体内に入るがコイルアンテナ１０は筐体の上面に
残り、筐体の上面に突出するコイルアンテナ１０に給電
接点５から給電され、樹脂部２を介する直線状アンテナ
３には給電されない。FIGS. 4 (a) and 4 (b) show an example of this, where (a) shows a state in which the whip antenna is pulled out of the housing of the radio equipment, and (b) shows a state in which the antenna is housed in the housing. Is shown. When pulling out the whip antenna,
As shown in FIG.
Is connected to the lower end portion 33 of the linear antenna 3 via the terminal, and power is supplied to the linear antenna 3, but power is not supplied to the coil antenna 10 via the resin portion 2. When the whip antenna is housed, as shown in FIG. 4 (b), the linear antenna 3 enters the housing, but the coil antenna 10 remains on the upper surface of the housing, and the feeding contact is made to the coil antenna 10 projecting from the upper surface of the housing. 5, and is not supplied to the linear antenna 3 via the resin portion 2.
【０００４】[0004]
【発明が解決しようとする課題】上述した従来のアンテ
ナ装置を有する携帯無線機の小型化が進む中で、アンテ
ナ引出し時にホイップアンテナの先端にあり、アンテナ
収納時に無線機筐体上面から突出するコイルアンテナ部
を小型化することが望まれている。しかし、アンテナ収
納時に使用するコイルアンテナの帯域を確保するために
はコイルの電気長として１／４波長程度の長さに見合っ
た巻数が必要であり、コイルアンテナの長さを短縮する
には制限があった。なおホイップアンテナ引出し時にお
いては直線状アンテナが動作すれば足り、先端コイルは
不要のものである。With the miniaturization of the portable radio having the above-mentioned conventional antenna device, the coil which is located at the tip of the whip antenna when the antenna is pulled out and projects from the upper surface of the radio housing when the antenna is stored. It is desired to reduce the size of the antenna unit. However, in order to secure the band of the coil antenna used when the antenna is housed, it is necessary to have the number of turns corresponding to the length of about 1/4 wavelength as the electrical length of the coil. was there. When the whip antenna is pulled out, it is sufficient that the linear antenna operates, and the tip coil is unnecessary.
【０００５】本発明の目的はアンテナ収納時の利得特性
を損ねることなく、先端コイルの形状を小型化し、アン
テナ収納時においても突出部を小さくしたアンテナ装置
を提供することである。SUMMARY OF THE INVENTION It is an object of the present invention to provide an antenna device in which the shape of the tip coil is reduced and the protrusion is reduced even when the antenna is housed, without impairing the gain characteristics when the antenna is housed.
【０００６】[0006]
【課題を解決するための手段】本発明の携帯無線機のア
ンテナ装置は、第１のアンテナの上方先端位置に設けら
れ、第１のアンテナの無線機筐体内収容時に無線機筐体
の外に残る先端部と、無線機筐体内に配置される固定部
を有し、第１のアンテナが無線機筐体内へ収納される
と、先端部と固定部により第２のアンテナが形成され
る。An antenna device for a portable wireless device according to the present invention is provided at an upper end position of a first antenna, and is disposed outside the wireless device housing when the first antenna is housed in the wireless device housing. It has a remaining distal end and a fixed portion disposed in the wireless device housing. When the first antenna is housed in the wireless device housing, a second antenna is formed by the distal end and the fixed portion.
【０００７】第２のアンテナは、先端部を構成する先端
コイルと固定部を構成する固定コイルが接続されて形成
されるコイルアンテナであってもよい。[0007] The second antenna may be a coil antenna formed by connecting a tip coil forming a tip portion and a fixed coil forming a fixed portion.
【０００８】第１のアンテナは直線状のアンテナであ
り、先端コイルは、第１のアンテナの上方に絶縁部を介
して設けられ、固定コイルは無線機筐体内上部に位置
し、第１のアンテナの無線機筐体内への収納および筐体
外への引出しに用いる中央孔を有してもよい。[0008] The first antenna is a linear antenna, the tip coil is provided above the first antenna via an insulating portion, the fixed coil is located in the upper part in the housing of the radio, the first antenna May have a central hole used for storage inside the wireless device housing and drawing out of the housing.
【０００９】第１のアンテナが無線機筐体の外に引出さ
れると無線機入出力整合回路から第１のアンテナに給電
し、第１のアンテナが無線機筐体内に収納されると無線
機入出力整合回路から第２のアンテナに給電する給電手
段を有してもよい。When the first antenna is pulled out of the wireless device housing, power is supplied from the wireless device input / output matching circuit to the first antenna, and when the first antenna is housed in the wireless device housing, the wireless device is powered off. Power supply means for supplying power to the second antenna from the input / output matching circuit may be provided.
【００１０】給電手段は容量結合を用いる給電手段を含
んでもよい。[0010] The power supply means may include power supply means using capacitive coupling.
【００１１】固定コイルに対する先端コイルの接続は容
量結合によってもよい。The connection of the tip coil to the fixed coil may be by capacitive coupling.
【００１２】[0012]
【発明の実施の形態】次に、本発明の実施の形態につい
て図面を参照して説明する。なお、いずれの実施の形態
にあっても、無線機筐体は非金属製であり、またホイッ
プアンテナは先端部の先端コイル１と、直線状アンテナ
３と、先端コイル１と直線状アンテナ３の間に置かれる
樹脂部２から構成される。Next, embodiments of the present invention will be described with reference to the drawings. In any of the embodiments, the wireless device housing is made of non-metal, and the whip antenna is formed of the distal end coil 1, the linear antenna 3, and the distal end coil 1 and the linear antenna 3. It is composed of a resin part 2 interposed therebetween.
【００１３】図１（ａ），（ｂ）は、本発明の１つの実
施の形態の要部を示す図であり、給電接点５に無線桟筐
体の上部に設けられた固定コイル４の下端部が接続され
ており、固定コイル４の先端部には金属リング端子４１
が設けてある。ホイップアンテナの引出し、収納時には
固定コイル４の中央孔を通して直線状アンテナ３が出し
入れされる。先端コイル１の下端部には端子１１が、直
線状アンテナ３の下端部には下端端子３１が設けられて
いる。端子１１、下端端子３１は金属リング端子４１と
接続可能である。FIGS. 1 (a) and 1 (b) are views showing a main part of an embodiment of the present invention, in which a lower end of a fixed coil 4 provided on an upper portion of a radio beam housing at a power supply contact 5 is shown. The fixed coil 4 has a metal ring terminal 41
Is provided. When the whip antenna is pulled out and stored, the linear antenna 3 is put in and out through the center hole of the fixed coil 4. A terminal 11 is provided at a lower end of the tip coil 1, and a lower end terminal 31 is provided at a lower end of the linear antenna 3. The terminal 11 and the lower end terminal 31 can be connected to the metal ring terminal 41.
【００１４】図１（ａ）に示すように、ホイップアンテ
ナ引出し時には、直線状アンテナ３の下端端子３１と、
給電接点５が下端部に接続された固定コイル４の先端部
の金属リング端子４１とが接続される。先端コイル１は
樹脂部２で絶縁されているのでホイップアンテナは直線
状アンテナ３として機能する。また図１（ｂ）に示すよ
うに、ホイップアンテナ収納時には、先端１の下端部の
端子１１が給電接点５がコイル下端に接続された固定コ
イル４の先端部の金属リング端子４１と接続され、先端
コイル１と固定コイル４は一つのコイルアンテナを形成
する。そして、固定コイル４を介して先端コイル１に給
電される。この時固定コイル４と直線状アンテナ３とは
樹脂部２で絶縁されているので直線状アンテナには給電
されない。よってアンテナ収納時には先端コイル１と固
定コイル４が一つのコイルアンテナとして機能する。As shown in FIG. 1A, when the whip antenna is pulled out, the lower end terminal 31 of the linear antenna 3 is
The power supply contact 5 is connected to the metal ring terminal 41 at the distal end of the fixed coil 4 connected to the lower end. Since the tip coil 1 is insulated by the resin portion 2, the whip antenna functions as the linear antenna 3. Further, as shown in FIG. 1B, when the whip antenna is housed, the terminal 11 at the lower end of the tip 1 is connected to the metal ring terminal 41 at the tip of the fixed coil 4 having the feeding contact 5 connected to the lower end of the coil. The tip coil 1 and the fixed coil 4 form one coil antenna. Then, power is supplied to the distal end coil 1 via the fixed coil 4. At this time, since the fixed coil 4 and the linear antenna 3 are insulated by the resin portion 2, power is not supplied to the linear antenna. Therefore, when the antenna is housed, the tip coil 1 and the fixed coil 4 function as one coil antenna.
【００１５】図２（ａ），（ｂ）は、本発明の第２の実
施形態の要部を示し、上端、下端に金属リング４２，４
３が設けられている固定コイル４が下端の金属リング４
３で給電接点５に接続されている。直線状アンテナ３は
金属リング４２，４３が設けられた固定コイル４の中央
孔を通して出し入れされる。先端コイル１の下端には固
定コイル４の上端の金属リング４２と接合可能な金属リ
ング１２を設けている。直線状アンテナ３の下端には固
定コイル下端の金属リング４３と接合可能な金属リング
３２を設けてある。FIGS. 2A and 2B show a main part of a second embodiment of the present invention.
A fixed coil 4 provided with a metal ring 4 at the lower end
3 is connected to the power supply contact 5. The linear antenna 3 is put in and out through the center hole of the fixed coil 4 provided with the metal rings 42 and 43. At the lower end of the tip coil 1, a metal ring 12 that can be joined to the metal ring 42 at the upper end of the fixed coil 4 is provided. The lower end of the linear antenna 3 is provided with a metal ring 32 that can be joined to the metal ring 43 at the lower end of the fixed coil.
【００１６】図２（ａ）に示すように、ホイップアンテ
ナ引出し時には、直線状アンテナ３の下端の金属リング
３２が固定コイル４下部の金属リング４３と接合され
る。直線状アンテナ３と、先端コイル１とは樹脂部２で
絶縁されているので、ホイップアンテナは直線状アンテ
ナ３として機能する。図２（ｂ）に示すホイップアンテ
ナ収納時には先端コイル１の下端の金属リング１２が、
固定コイル上端の金属リング４２と接続され、一つのコ
イルアンテナを形成する。そして、固定コイル４を介し
て先端コイル１に給電される。この時、直線状アンテナ
３は固定コイル４とは樹脂部２で絶縁されているので給
電されない。よってアンテナ収納時には先端コイル１と
固定コイル４が一つのコイルアンテナをとして機能す
る。As shown in FIG. 2A, when pulling out the whip antenna, the metal ring 32 at the lower end of the linear antenna 3 is joined to the metal ring 43 below the fixed coil 4. Since the linear antenna 3 and the tip coil 1 are insulated by the resin portion 2, the whip antenna functions as the linear antenna 3. When the whip antenna shown in FIG. 2B is stored, the metal ring 12 at the lower end of the tip coil 1
It is connected to the metal ring 42 at the upper end of the fixed coil to form one coil antenna. Then, power is supplied to the distal end coil 1 via the fixed coil 4. At this time, since the linear antenna 3 is insulated from the fixed coil 4 by the resin portion 2, no power is supplied. Therefore, the tip coil 1 and the fixed coil 4 function as one coil antenna when the antenna is housed.
【００１７】図３（ａ），（ｂ）は本発明の今１つの実
施形態の要部を示し、給電接点５に固定コイル４の下部
が接続されており、直線状アンテナ３は固定コイル４の
中央孔を通して出し入れされる。アンテナ収納時には先
端コイル１の下端部１３が固定コイル４に容量結合され
る。FIGS. 3 (a) and 3 (b) show a main part of another embodiment of the present invention, in which a lower portion of a fixed coil 4 is connected to a feeding contact 5 and the linear antenna 3 is Through the central hole. When the antenna is housed, the lower end 13 of the tip coil 1 is capacitively coupled to the fixed coil 4.
【００１８】図３（ａ）に示すように、ホイップアンテ
ナ引出し時には、直線状アンテナ３の下端部３３が固定
コイル４の内部において容量結合される。先端コイル１
は樹脂部２で絶縁されているので、ホイップアンテナは
直線状アンテナ３として機能する。図３（ｂ）に示すホ
イップアンテナの収納時には、先端コイル１の下端部１
３が、固定コイル４の内部において容量結合され、一つ
のコイルアンテナとして動作する。直線状アンテナ３は
樹脂部２で絶縁されているので給電されない。よってア
ンテナ収納時には先端コイル１と固定コイル４が一つの
コイルアンテナとして機能する。As shown in FIG. 3A, when the whip antenna is pulled out, the lower end 33 of the linear antenna 3 is capacitively coupled inside the fixed coil 4. Tip coil 1
Is insulated by the resin portion 2, the whip antenna functions as the linear antenna 3. When the whip antenna shown in FIG.
3 are capacitively coupled inside the fixed coil 4 and operate as one coil antenna. Since the linear antenna 3 is insulated by the resin portion 2, no power is supplied. Therefore, when the antenna is housed, the tip coil 1 and the fixed coil 4 function as one coil antenna.
【００１９】[0019]
【発明の効果】以上説明したように本発明は、必要に応
じて無線機筐体外に引出されまたは無線機筐体内に収納
される第１のアンテナの先端に配置される先端部が、ア
ンテナ収納時には無線機筐体内に配置される固定部と接
続されて第２アンテナを形成することにより、第２アン
テナの利得特性を損なうことなく第１のアンテナの先端
部およびアンテナ収納時に筐体から突出する部分を小型
にすることができる効果がある。As described above, according to the present invention, the distal end portion of the first antenna which is drawn out of the housing of the radio unit or stored in the housing of the radio unit as required is provided with the antenna housing. Sometimes, the second antenna is formed by being connected to a fixed portion disposed in the housing of the wireless device, so that the tip of the first antenna and the antenna are projected from the housing when the antenna is housed without impairing the gain characteristics of the second antenna. There is an effect that the portion can be reduced in size.
【図１】本発明のアンテナ装置の１つの実施形態の要部
を示す説明用図である。FIG. 1 is an explanatory diagram showing a main part of one embodiment of an antenna device of the present invention.
【図２】本発明のアンテナ装置の第２の実施形態の要部
を示す説明用図である。FIG. 2 is an explanatory diagram showing a main part of a second embodiment of the antenna device of the present invention.
【図３】本発明のアンテナ装置の今１つの実施形態の要
部を示す説明用図である。FIG. 3 is an explanatory diagram showing a main part of another embodiment of the antenna device of the present invention.
【図４】従来例のアンテナ装置の要部を示す説明用図で
ある。 （注）図１〜４において、（ａ）は直線状アンテナ引出
し時を、（ｂ）は直線状アンテナ収納時を示している。FIG. 4 is an explanatory diagram showing a main part of a conventional antenna device. (Note) In FIGS. 1 to 4, (a) shows when the linear antenna is pulled out, and (b) shows when the linear antenna is housed.
１ 先端コイル １１ 端子 １２ 金属リング １３ 下端部 ２ 樹脂部 ３ 直線状アンテナ ３１ 下端端子 ３２ 金属リング ３３ 下端部 ４ 固定コイル ４１ 金属リング端子 ４２ 金属リング ４３ 金属リング ５ 給電接点 １０ コイルアンテナ REFERENCE SIGNS LIST 1 tip coil 11 terminal 12 metal ring 13 lower end 2 resin portion 3 linear antenna 31 lower end terminal 32 metal ring 33 lower end 4 fixed coil 41 metal ring terminal 42 metal ring 43 metal ring 5 feed contact 10 coil antenna
Claims (6)
機筐体から引出され、または無線機筐体内に収納される
携帯無線機のアンテナ装置において、 第１のアンテナの上方先端位置に設けられ、第１のアン
テナの無線機筐体内への収容時に無線機筐体の外に残る
先端部と、無線機筐体内に配置される固定部を有し、第
１のアンテナが無線機筐体内へ収納されると、前記先端
部と前記固定部により第２のアンテナが形成されること
を特徴とする携帯無線機のアンテナ装置。An antenna device for a portable wireless device which is drawn out of a housing of a wireless device or accommodated in a housing of a wireless device as required for communication, provided at an upper end position of the first antenna. A first antenna that has a tip that remains outside the housing of the wireless device when the first antenna is housed in the housing of the wireless device, and a fixed portion that is disposed in the housing of the wireless device. The antenna device for a portable wireless device, wherein the second antenna is formed by the distal end portion and the fixing portion when housed in the portable device.
成する先端コイルと前記固定部を構成する固定コイルが
接続されて形成されるコイルアンテナである請求項１に
記載の携帯無線機のアンテナ装置。2. The portable wireless device according to claim 1, wherein the second antenna is a coil antenna formed by connecting a tip coil forming the tip portion and a fixed coil forming the fixing portion. Antenna device.
であり、前記先端コイルは、前記第１のアンテナの上方
に絶縁部を介して設けられ、前記固定コイルは無線機筐
体内上部に位置し、前記第１のアンテナの無線機筐体内
への収納および無線機筐体外への引出しに用いる中央孔
を有する請求項２に記載の携帯無線機のアンテナ装置。3. The first antenna is a linear antenna, the tip coil is provided above the first antenna via an insulating portion, and the fixed coil is located at an upper part in a wireless device housing. The antenna device for a portable wireless device according to claim 2, further comprising a center hole used to store the first antenna in the wireless device housing and draw out the first antenna from the wireless device housing.
引出されると無線機入出力整合回路から第１のアンテナ
に給電し、前記第１のアンテナが無線機筐体内に収納さ
れると前記整合回路から前記第２のアンテナに給電する
給電手段を有する請求項３に記載の携帯無線機のアンテ
ナ装置。4. When the first antenna is pulled out of the wireless device housing, power is supplied from the wireless device input / output matching circuit to the first antenna, and the first antenna is housed in the wireless device housing. 4. The antenna device for a portable wireless device according to claim 3, further comprising a power supply unit for supplying power from the matching circuit to the second antenna.
段を含む請求項４に記載の携帯無線機のアンテナ装置。5. The antenna device for a portable wireless device according to claim 4, wherein said feeding means includes feeding means using capacitive coupling.
の接続は容量結合による請求項２に記載の携帯無線機の
アンテナ装置。6. The antenna device according to claim 2, wherein the connection of the tip coil to the fixed coil is performed by capacitive coupling.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11067196A JP2000269714A (en) | 1999-03-12 | 1999-03-12 | Antenna device for portable radio equipment |
| GB0005889A GB2350726B (en) | 1999-03-12 | 2000-03-10 | RF equipment including antenna apparatus which is compactly accomodated in the body of the equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11067196A JP2000269714A (en) | 1999-03-12 | 1999-03-12 | Antenna device for portable radio equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000269714A true JP2000269714A (en) | 2000-09-29 |
Family
ID=13337923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11067196A Pending JP2000269714A (en) | 1999-03-12 | 1999-03-12 | Antenna device for portable radio equipment |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2000269714A (en) |
| GB (1) | GB2350726B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009284366A (en) | 2008-05-26 | 2009-12-03 | Beat Sonic:Kk | Roof antenna for vehicle |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE9500456D0 (en) * | 1995-02-08 | 1995-02-08 | Allgon Ab | High-efficient compact antenna means for a personal telephone with a small receiving depth |
| JP3431379B2 (en) * | 1995-11-22 | 2003-07-28 | 日本アンテナ株式会社 | antenna |
| SE509638C2 (en) * | 1996-06-15 | 1999-02-15 | Allgon Ab | Meander antenna device |
| US5963871A (en) * | 1996-10-04 | 1999-10-05 | Telefonaktiebolaget Lm Ericsson | Retractable multi-band antennas |
| WO1998028856A1 (en) * | 1996-12-23 | 1998-07-02 | Telefonaktiebolaget Lm Ericsson | Radio telephone with separate antenna for stand-by mode |
| SE513368C2 (en) * | 1997-11-14 | 2000-09-04 | Moteco Ab | Antenna device for dual frequency bands |
| SE511255C2 (en) * | 1998-01-30 | 1999-09-06 | Moteco Ab | Antenna device for dual frequency bands |
-
1999
- 1999-03-12 JP JP11067196A patent/JP2000269714A/en active Pending
-
2000
- 2000-03-10 GB GB0005889A patent/GB2350726B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009284366A (en) | 2008-05-26 | 2009-12-03 | Beat Sonic:Kk | Roof antenna for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0005889D0 (en) | 2000-05-03 |
| GB2350726A (en) | 2000-12-06 |
| GB2350726B (en) | 2002-01-16 |
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