WO2004042866A1 - Folded monopole antenna for cellular phone - Google Patents
Folded monopole antenna for cellular phone Download PDFInfo
- Publication number
- WO2004042866A1 WO2004042866A1 PCT/KR2003/000988 KR0300988W WO2004042866A1 WO 2004042866 A1 WO2004042866 A1 WO 2004042866A1 KR 0300988 W KR0300988 W KR 0300988W WO 2004042866 A1 WO2004042866 A1 WO 2004042866A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- receiver
- cellular phone
- antenna
- sub
- monopole antenna
- Prior art date
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
-
- 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
- H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
Definitions
- the present invention relates to a folded monopole antenna for a
- an extendable antenna is
- the above cellular phone has a problem for implementing a
- the slant folded monopole antenna is capable of enhancing a
- Figure 1 is a perspective view of a conventional slant folded monopole
- the slant folded monopole antenna 101 includes a
- support plate 111 having a connector for a connection with a cellular phone, a
- the receiver 120 has a length shorter than the length of an
- a support portion 10 having a connector 13 connected with a cellular phone 3 in
- a receiver 20 which is vertically provided in an
- a folded monopole antenna for a cellular phone in which an end portion 31 of the sub-receiver 30 is distanced from an end line 11
- the sub-receiver 30 is bent in a horizontal direction from at least one
- the sub-receiver 30 is bent in a horizontal direction from at least
- one portion of the receiver 20 is downwardly bent for thereby having a
- the sub-receiver 30 is bent in a horizontal direction from at least one
- the sub-receiver 30 is downwardly bent from a plurality of portions of
- the receiver for thereby forming a plurality of downwardly bent sub-receivers.
- Figure 1 is a perspective view illustrating a conventional slant folded monopole antenna
- Figure 2 is a perspective view illustrating a folded monopole antenna for
- Figure 3 is a partial cross sectional view of a portion A of Figure 2
- Figure 4 is a perspective view illustrating a state of a use of a folded
- Figure 5 is a view illustrating a result of a measurement of a standing
- Figure 6 is a view illustrating a result of a measurement of a folded
- Figure 7 is a perspective view illustrating a folded monopole antenna for
- Figure 8 is a view illustrating a result of a measurement of a
- Figure 9 is a perspective view illustrating a folded monopole antenna for
- Figure 10 is a perspective view illustrating a folded monopole antenna for
- Figure 11 is a perspective view illustrating a folded monopole antenna for
- Figure 12 is a perspective view illustrating a folded monopole antenna for
- Figure 2 is a perspective view illustrating a folded monopole antenna for
- Figure 3 is a partial cross sectional view of a portion A of Figure 2 according to
- a support portion 10 includes a support portion 10, a receiver 20
- sub-receiver 30 which is downwardly bent from an upper portion of the receiver
- the support portion 10 is formed of a connector 13 and a
- the connector 13 is formed of a narrow and
- the receiver 20 is surrounded by the coating material 21 such as urethane.
- the connector 13 is formed of a flat portion
- portion 15 is transferred to a signal receiving circuit of the cellular phone 3.
- the sub-receiver 30 is horizontally bent from the upper side of the
- portion 31 of the same is distanced from the end line 11 of the upper portion of
- the cellular phone and has a resonance interval "a" for thereby providing a
- the antenna 1 Since the antenna 1 is folded, the antenna 1 has a current distribution which is
- an antenna effective height is high, and a receiving power is increased, and a gain is increased.
- the antenna 3 and it is possible to use the cellular phone 3 in a wider frequency
- Figure 5 is a view illustrating a result of a measurement of a standing
- FIGS. 2 and 3 which is measured using a network analyzer. As shown therein,
- Figure 6 is a view illustrating a result obtained by measuring
- the present invention may be adapted to the antenna
- Figure 7 is a perspective view of a folded monopole antenna for a
- the folded monopole antenna 1 for a cellular phone according to a second embodiment of the present invention.
- the folded monopole antenna 1 for a cellular phone according to
- the sub-receiver 20 is the sub-receiver 20.
- Figure 8 is a view illustrating a result of a measurement o a
- Figures 9 and 10 are perspective views illustrating a folded monopole
- Figures 11 and 12 are perspective views illustrating a folded monopole
- the sub-receiver 30 of the folded monopole As shown therein, the sub-receiver 30 of the folded monopole
- antenna 1 for a cellular phone according to the present invention is bent in a
- sub-receiver 30 may be coated with the coating material 21.
- the sub-receiver 30 may be fabricated in various shapes in addition to
- the length of the antenna, and the cellular phone may be used in a wider frequency
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Details Of Aerials (AREA)
- Support Of Aerials (AREA)
Abstract
The present invention relates to a folded monopole antenna for a cellular phone which is capable of decreasing the length of an antenna of a cellular phone and is adapted to a wider band width and is capable of enhancing an impedance and gain. In a folded monopole antenna which has a support portion having a connector connected with a cellular phone in a lower portion of the same, a receiver which is vertically provided in an upper portion of the support portion and is connected with the connector, and a sub-receiver which is downwardly bent from an upper portion of the receiver, there is provided a folded monopole antenna for a cellular phone in which an end portion of the sub-receiver is distanced from an end line of an upper portion of the cellular phone by a certain distance for thereby obtaining a certain resonance interval 'a'.
Description
FOLDED MONOPOLE ANTENNA FOR CELLULAR PHONE
BACKGROUND OF THE INVENTION
Field of the invention
The present invention relates to a folded monopole antenna for a
cellular phone, and in particular to a folded monopole antenna for a cellular
phone which is capable of increasing an impedance by improving a structure of
a monopole antenna and implementing an excellent gain.
Description of Related Art
A repeater and cellular phone antenna for a mobile communication
service is directed to receiving a radio signal which is generated in a base
station or in an external place and externally transmitting an electric signal
generated in a communication instrument.
In the type of an antenna for cellular phone, an extendable antenna is
generally used due to an inherent structural characteristic of a cellular phone
and its antenna. The above cellular phone has a problem for implementing a
small size and lightness body of a cellular phone. Therefore, it is impossible to
implement a small sized antenna in consideration of a decrease in performance.
In order to overcome the above problems, the applicant of the present
invention has the Korean patent No. 1994-0011486. According to the above
patent '486, the slant folded monopole antenna is capable of enhancing a
receiving gain by increasing an impedance even when the length of the antenna
is shortened.
The above conventional antenna will be described in detail with
reference to the accompanying drawings.
Figure 1 is a perspective view of a conventional slant folded monopole
antenna. As shown therein, the slant folded monopole antenna 101 includes a
support plate 111 having a connector for a connection with a cellular phone, a
receiver 120 which is vertically installed in an upper portion of the support plate
111 , and a sub-receiving portion 130 which is bent from an upper portion of the
receiver 120 and downwardly slanted in a direction of the support plate 111 and
grounded to a narrow portion 151 of the support plate 111.
In addition, the receiver 120 has a length shorter than the length of an
antenna, and a lower portion of the receiver 120 is coated with a coating
material. In the interior of the coated material, there* are provided an outer
conductive material(not shown) for supporting the receiver 120, an empty core
coil(not shown) disposed between the receiver 120 and the connector, and an
insulation material(not shown) disposed between the outer conductive material
and the empty coil.
In the thusly constructed conventional art, it is possible to implement a
small sized cellular phone by decreasing the length of the antenna. However,
since an end portion of the sub-receiver 130 is grounded with the narrow potion
151 , it is impossible to use in a wider frequency band due to a non-resonance
characteristic. In addition, there is a limit for enhancing an impedance and gain.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a folded
monopole antenna for a cellular phone which overcomes the problems
encountered in the conventional art.
It is another object of the present invention to provide a folded
monopole antenna for a cellular phone which is capable of decreasing the
length of an antenna of a cellular phone and is adapted in a wider frequency
band and is capable of enhancing an impedance and gain.
To achieve the above objects, in a folded monopole antenna which has
a support portion 10 having a connector 13 connected with a cellular phone 3 in
a lower portion of the same, a receiver 20 which is vertically provided in an
upper portion of the support portion 10 and is connected with the connector 13,
and a sub-receiver 30 which is downwardly bent from an upper portion of the
receiver 20, there is provided a folded monopole antenna for a cellular phone in
which an end portion 31 of the sub-receiver 30 is distanced from an end line 11
of an upper portion of the cellular phone by a certain distance for thereby
obtaining a certain resonance interval "a", so that it is possible to enhance an
impedance and gain by increasing a transmission and receiving band.
The sub-receiver 30 is bent in a horizontal direction from at least one
portion of the receiver 20 and is vertically downwardly bent in parallel with the
receiver 20. The sub-receiver 30 is bent in a horizontal direction from at least
one portion of the receiver 20 and is downwardly bent for thereby having a
certain slant angle with respect to the receiver 20.
The sub-receiver 30 is bent in a horizontal direction from at least one
portion of the receiver 20 and is bent in an inward direction at an angle of 90° by
multiple times.
The sub-receiver 30 is downwardly bent from a plurality of portions of
the receiver for thereby forming a plurality of downwardly bent sub-receivers.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will become better understood with reference to
the accompanying drawings which are given only by way of illustration and thus
are not limitative of the present invention, wherein;
Figure 1 is a perspective view illustrating a conventional slant folded
monopole antenna;
Figure 2 is a perspective view illustrating a folded monopole antenna for
a cellular phone according to a first embodiment of the present invention;
Figure 3 is a partial cross sectional view of a portion A of Figure 2
according to the present invention;
Figure 4 is a perspective view illustrating a state of a use of a folded
monopole antenna for a cellular phone of Figures 2 and 3;
Figure 5 is a view illustrating a result of a measurement of a standing
wave of a folded monopole antenna for a cellular phone of Figures 2 and 3;
Figure 6 is a view illustrating a result of a measurement of a folded
monopole antenna for a cellular phone of Figures 2 and 3;
Figure 7 is a perspective view illustrating a folded monopole antenna for
a cellular phone according to a second embodiment of the present invention;
Figure 8 is a view illustrating a result of a measurement of a
characteristic of a standing wave of a folded monopole antenna of a cellular
phone of Figure 7;
Figure 9 is a perspective view illustrating a folded monopole antenna for
a cellular phone according to a third embodiment of the present invention;
Figure 10 is a perspective view illustrating a folded monopole antenna for
a cellular phone according to a fourth embodiment of the present invention;
Figure 11 is a perspective view illustrating a folded monopole antenna for
a cellular phone according to a fifth embodiment of the present invention; and
Figure 12 is a perspective view illustrating a folded monopole antenna for
a cellular phone according to a sixth embodiment of the present invention.
DETAILED DESCRIPTION OF PREFFERED EMBODIMENTS
The preferred embodiments of the present invention will be described
with reference to the accompanying drawings.
Figure 2 is a perspective view illustrating a folded monopole antenna for
a cellular phone according to a first embodiment of the present invention, and
Figure 3 is a partial cross sectional view of a portion A of Figure 2 according to
the present invention.
As shown therein, the folded monopole antenna 1 for a cellular phone
according to the present invention includes a support portion 10, a receiver 20
which is vertically installed in an upper portion of the support portion 10, and a
sub-receiver 30 which is downwardly bent from an upper portion of the receiver
20.
At this time, the support portion 10 is formed of a connector 13 and a
urethane coating material 21 , and the connector 13 is formed of a narrow and
long conductive plate, and one end of the same is flat, and the other end of the
same is bent in a L-shaped or in a semi-circular shape. The lower portion of the
receiver 20 is surrounded by the coating material 21 such as urethane.
As shown in the drawings, the connector 13 is formed of a flat portion
and a bent portion, and a contact portion 15 is formed in an intermediate portion
of the bent portion of the same for thereby being electrically connected with a
signal receiving circuit of the cellular phone. When adapting the antenna 1 to
the cellular phone 3, the signal received in the antenna 1 through the contact
portion 15 is transferred to a signal receiving circuit of the cellular phone 3.
The sub-receiver 30 is horizontally bent from the upper side of the
receiver 20 and then is downwardly bent in parallel with the receiver 20. An end
portion 31 of the same is distanced from the end line 11 of the upper portion of
the cellular phone and has a resonance interval "a" for thereby providing a
resonance characteristic to the antenna 1.
As shown in Figure 4, the folded monopole antenna 1 for a cellular
phone according to the present invention is directed to transmitting and
receiving a signal in a state that the same is engaged to the cellular phone 3.
Since the antenna 1 is folded, the antenna 1 has a current distribution which is
two times compared to the conventional antenna which is not folded, so that a
radiation resistance characteristic is high, and since the current remains in the
sub-receiver 30 of the bent region from the receiver 20, an antenna effective
height is high, and a receiving power is increased, and a gain is increased.
In addition, since the end portion 31 of the sub-receiver 30 is distanced
from the end line 11 of the upper portion of the cellular phone and has a
resonance interval "a" therebetween, it is possible to increase a capacitance of
the antenna 3, and it is possible to use the cellular phone 3 in a wider frequency
band by providing a desired resonance characteristic.
Figure 5 is a view illustrating a result of a measurement of a standing
wave characteristic of a folded monopole antenna for a cellular phone of
Figures 2 and 3 which is measured using a network analyzer. As shown therein,
there is shown a good characteristic of below 2: 1 in the PCS frequency band, it
is confirmed that it is possible to use the cellular phone in a wider frequency
band.
In addition, Figure 6 is a view illustrating a result obtained by measuring
a radiation pattern of a folded monopole antenna 1 for a cellular phone of
Figures 2 and 3. As shown therein, there is shown a characteristic very similar
with that of a conventional helical antenna which has a non-direction oriented
characteristic. Therefore, the present invention may be adapted to the antenna
1 for the cellular phone 3.
Figure 7 is a perspective view of a folded monopole antenna for a
cellular phone according to a second embodiment of the present invention. As
shown therein, the folded monopole antenna 1 for a cellular phone according to
the present invention has the same construction as the first embodiment of the
present invention except for the folded monopole antenna 1 and the sub-
receiver 30. In this embodiment of the present invention, the sub-receiver 20 is
downwardly bent for thereby having a certain slant angle with respect to the
receiver 20, and the end portion 31 of the sub-receiver 30 is distanced from the
end line 11 of the upper side of the cellular phone by a certain resonance
interval "a".
In addition, Figure 8 is a view illustrating a result of a measurement o a
standing wave characteristic of a folded monopole antenna of Figure 7. As
shown therein, in the monopole antenna 1 for a cellular phone according to the
second embodiment of the present invention, since the sub-receiver 30 is slant
and bent, so that it is possible to obtain a band characteristic which is better by
about 20% compared to the folded monopole antenna 1 for a cellular phone
according to the first embodiment of the present invention.
Figures 9 and 10 are perspective views illustrating a folded monopole
antenna for a cellular phone according to the third and fourth embodiments of
the present invention. As shown therein, in the folded monopole antenna 1 for a
cellular phone according to the present invention, there may be provided a
plurality of bent structures of the sub-receiver 30 or a plurality of the slant bent
sub-receivers 30 may be provided.
Figures 11 and 12 are perspective views illustrating a folded monopole
antenna for a cellular phone according to the fifth and sixth embodiments of the
present invention. As shown therein, the sub-receiver 30 of the folded monopole
antenna 1 for a cellular phone according to the present invention is bent in a
horizontal direction from at least one region of the receiver 20 and is inwardly
bent at an angle of 90° by multiple times. At this time, the receiver 20 and the
sub-receiver 30 may be coated with the coating material 21.
The sub-receiver 30 may be fabricated in various shapes in addition to
the above described constructions. Various shapes of the antenna 1 having a
resonance interval "a" which is formed in such a manner that the end portion 31
of the sub-receiver 30 is distanced from the end line of the upper side of the
cellular phone are included in the scope of the present invention.
In the present invention, since the folded antenna for the cellular phone
according to the present invention is fabricated in a folded shape, it is possible
to implement a small sized product of the cellular phone 3 by decreasing the
length of the antenna 1. In addition, a resonance characteristic is implemented
based on the resonance interval "a" by forming a resonance interval "a" in the
end portion 31 of the sub-receiver 30, it is possible to use the cellular phone 3
according to the present invention in a wider frequency band, and it is possible
o enhance an impedance and gain.
As described above, in the present invention, since a resonance interval
is formed by distancing an end portion of the sub-receiver of the antenna from
an end line of the upper side of the cellular phone, it is possible to decrease the
length of the antenna, and the cellular phone may be used in a wider frequency
band, and an impedance and gain are enhanced.
As the present invention may be embodied in several forms without
departing from the spirit or essential characteristics thereof, it should also be
understood that the above-described examples are not limited by any of the
details of the foregoing description, unless otherwise specified, but rather
should be construed broadly within its spirit and scope as defined in the
appended claims, and therefore all changes and modifications that fall within
the meets and bounds of the claims, or equivalences of such meets and
bounds are therefore intended to be embraced by the appended claims.
Claims
1. In a folded monopole antenna which has a support portion 10 having a
connector 13 connected with a cellular phone 3 in a lower portion of the same, a
receiver 20 which is vertically provided in an upper portion of the support portion
10 and is connected with the connector 13, and a sub-receiver 30 which is
downwardly bent from an upper portion of the receiver 20, a folded monopole
antenna for a cellular phone in which an end portion 31 of the sub-receiver 30 is
distanced from an end line 11 of an upper portion of the cellular phone by a
certain distance for thereby obtaining a certain resonance interval "a", so that it
is possible to enhance an impedance and gain by increasing a transmission and
receiving band.
2. The antenna of claim 1 , wherein said sub-receiver 30 is bent in a
horizontal direction from at least one portion of the receiver 20 and is vertically
downwardly bent in parallel with the receiver 20.
3. The antenna of claim 1 , wherein said sub-receiver 30 is bent in a
horizontal direction from at least one portion of the receiver 20 and is
downwardly bent for thereby having a certain slant angle with respect to the
receiver 20.
4. The antenna of claim 1 , wherein said sub-receiver 30 is bent in a
horizontal direction from at least one portion of the receiver 20 and is bent in an
inward direction at an angle of 90° by multiple times.
5. The antenna of one among claims 1 through 4, wherein said sub-
receiver 30 is downwardly bent from a plurality of portions of the receiver for
thereby forming a plurality of downwardly bent sub-receivers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2003232641A AU2003232641A1 (en) | 2002-11-08 | 2003-05-28 | Folded monopole antenna for cellular phone |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20-2002-0033470 | 2002-11-08 | ||
| KR20-2002-0033470U KR200304442Y1 (en) | 2002-10-17 | 2002-11-08 | Folded Monopole Antenna For Mobile Phone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004042866A1 true WO2004042866A1 (en) | 2004-05-21 |
Family
ID=32464394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2003/000988 WO2004042866A1 (en) | 2002-11-08 | 2003-05-28 | Folded monopole antenna for cellular phone |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU2003232641A1 (en) |
| WO (1) | WO2004042866A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1845582A1 (en) * | 2006-04-10 | 2007-10-17 | Hitachi Metals, Ltd. | Wide-band antenna device comprising a U-shaped conductor antenna |
| GB2437115A (en) * | 2006-04-13 | 2007-10-17 | Motorola Inc | A multiple wire antenna element arrangement for a communication terminal |
| CN109193130A (en) * | 2018-09-07 | 2019-01-11 | 上海匀羿电磁科技有限公司 | A kind of pocket super-broadband two-beam antenna |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6124831A (en) * | 1999-07-22 | 2000-09-26 | Ericsson Inc. | Folded dual frequency band antennas for wireless communicators |
| WO2001091227A2 (en) * | 2000-05-24 | 2001-11-29 | Bae Systems Information And Electronic Systems Integration, Inc. | Wideband meander line loaded antenna |
| KR20020029310A (en) * | 2000-10-12 | 2002-04-18 | 후루까와 준노스께 | Small antenna |
| US20030006940A1 (en) * | 2001-05-16 | 2003-01-09 | Takanori Washiro | Line-shaped antenna |
| KR20030024645A (en) * | 2002-11-13 | 2003-03-26 | 장응순 | Folded monopole antenna |
-
2003
- 2003-05-28 WO PCT/KR2003/000988 patent/WO2004042866A1/en not_active Application Discontinuation
- 2003-05-28 AU AU2003232641A patent/AU2003232641A1/en not_active Abandoned
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6124831A (en) * | 1999-07-22 | 2000-09-26 | Ericsson Inc. | Folded dual frequency band antennas for wireless communicators |
| WO2001091227A2 (en) * | 2000-05-24 | 2001-11-29 | Bae Systems Information And Electronic Systems Integration, Inc. | Wideband meander line loaded antenna |
| KR20020029310A (en) * | 2000-10-12 | 2002-04-18 | 후루까와 준노스께 | Small antenna |
| US20030006940A1 (en) * | 2001-05-16 | 2003-01-09 | Takanori Washiro | Line-shaped antenna |
| KR20030024645A (en) * | 2002-11-13 | 2003-03-26 | 장응순 | Folded monopole antenna |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1845582A1 (en) * | 2006-04-10 | 2007-10-17 | Hitachi Metals, Ltd. | Wide-band antenna device comprising a U-shaped conductor antenna |
| EP2204881A1 (en) * | 2006-04-10 | 2010-07-07 | Hitachi Metals, Ltd. | Wide-band antenna device comprising a U-shaped conductor antenna |
| CN101055940B (en) * | 2006-04-10 | 2013-03-13 | 日立金属株式会社 | Antenna device and multiple frequency band type radio communication device using the same |
| GB2437115A (en) * | 2006-04-13 | 2007-10-17 | Motorola Inc | A multiple wire antenna element arrangement for a communication terminal |
| GB2437115B (en) * | 2006-04-13 | 2008-10-29 | Motorola Inc | Antenna arrangement and an RF communication terminal incorporating the arrangement |
| US7742010B2 (en) | 2006-04-13 | 2010-06-22 | Motorola, Inc. | Antenna arrangement |
| CN109193130A (en) * | 2018-09-07 | 2019-01-11 | 上海匀羿电磁科技有限公司 | A kind of pocket super-broadband two-beam antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003232641A1 (en) | 2004-06-07 |
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