CA1312921C - Paging receiver having a display - Google Patents
Paging receiver having a displayInfo
- Publication number
- CA1312921C CA1312921C CA000592760A CA592760A CA1312921C CA 1312921 C CA1312921 C CA 1312921C CA 000592760 A CA000592760 A CA 000592760A CA 592760 A CA592760 A CA 592760A CA 1312921 C CA1312921 C CA 1312921C
- Authority
- CA
- Canada
- Prior art keywords
- antenna
- receiver
- display
- metallic member
- paging receiver
- 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.)
- Expired - Fee Related
Links
- 239000002184 metal Substances 0.000 abstract description 20
- 229910000906 Bronze Inorganic materials 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 239000010974 bronze Substances 0.000 description 4
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/08—Constructional details, e.g. cabinet
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive loop type
Abstract
ABSTRACT OF THE DISCLOSURE
A paging receiver having a display prevents the gain of an antenna from being lowered despite that a metal frame which fixcs a display in place is located in close proximity to and in parallel with the antenna. A part of the metal frame which is close to the antenna is removed.
A paging receiver having a display prevents the gain of an antenna from being lowered despite that a metal frame which fixcs a display in place is located in close proximity to and in parallel with the antenna. A part of the metal frame which is close to the antenna is removed.
Description
PAGING RECEIVER HAVING A DISPLAY
BACK(~ROUNn OF T~IE INVENTION
The present invention relates to a pa~ing receiYer having a display and, more particularly, to a receiver with a displaY in which a frame made of metal for fixing a display in place is 5 con~i~ured to prevent the ~ain of an antenna from being lowered despite that the metal frame is located in close proximity to the antenna.
A modern paging receiver with a displaY has various advanced functions and has a miniature handy configuration.
10 The miniature design of this kind of paging receiver is accomplished by arranging various elements of the receiver close to ~ach other in a dense configuration. For example, an antenna and a frame for fixing a liquid crystal displaY (LCD) or similar display element are usually positioned in close proximity 15 to each other. Since the frame is generally made of stainless steel, phosPhor bronze or similar metal to have great mechanical stren~th, the metal frame close to the antenna is apt to lower the antenna gain and thereby the sensitivity of the receiver.
There~ore, when the metal fram~ and other members made of ~0 metàl are positioned in the vicinlty of the antenn~, there has to r~
' 70815-~8 be provided some implementation for preventing the antenna gain frQm beiny lowered.
SUMMARY OF THE INVENTION
It is therefore an object of the present in~en~ion to provide a paging receiver having a display which eliminates the decrease in antenna gain ascribable ~o various structural elements ~hich are located close to an an~enna.
It is another object of the present invention to provide a paging receiver with a display which allows a metal frame for fixing a display element to be positioned in close proximity to an ~ntenna ~ithout inviting the decrease in antenna gain.
It is another object of the present invention to provide a generally improved paging receiver having a display.
The present invention provides a receiver comprising: a loop antenna; a plurality of elements for processing a signal received by said antenna; and a metallic member for structurally supporting at least one of said elements, said metallic member having a generally-rectilinear portion located generally in parallel with a longitudinal axis of said loop antenna; said ~a metallic member further having a portion adiacent to said loop antenna, said adjacent portion including a gap of sufficient si7.e to substantially prevent loss of gain of said antenna resulting from mirror current in said metallic member induced by current in said antenna.
B
.
13~2921 BRIEF DESCRIPTION OF THE DRAWINGS
The above and other obiects, features and advantages of the present invl3ntion will become more apparent from the following detailed description taken with the accompanyillg drawings in 5 which:
Fig. lA is a perspective view of a body POrtiOn of a prior art paging receiver having a display, a casing and a cover of the paging receiver being omitted for clarity;
Fig. lB is a plan view of the paging receiver bodY portion 10 shown in Fig. lA;
Fig. 2 is a view useful for understanding why the antenna ~ain is loweredi Fig. 3 is an exploded perspective view of a paging receiver having a displaY em~odYing the present invention;
Fig. 4 is a plan view of a body portion of the paging receiver shown in Fi~. 3;
Fig. 5A is a front view as seen in a direction VA-YA of Fig. 4;
Fig. SB is a rear view as seen in a direction YB-YB of 20 Fig. 4;
Fig. 5C is a side elevation as seen in a direction VC-YC of Fig. 4; and Fig. 5D is a side elevation as seen in a direction YD-YD of Fig. 4.
- . .
. ,: . .
. .
' ~
~, . . .
DESCRIPTION OF THE PREFERRED EMBODIMENTS
To better understand the present invention, a prior art paging receiver with a display and why the antenna gain is lowered when a metal frame for fixin~ a display is located close 5 to an antenna will be described with reference to Fi~s. lA, lB and 2.
Referring to Figs. lA and lB, a body of a prior art paging receiver 10 includes a printed circuit board 12 which is loaded with various structural elements of the receiver 10. Specifically, 10 a power switch 14, an LCD or similar display 16, a metal frame 18, a loudspeaker 2 0 and an antenna 2 2 are arran~ed on th~
printed circuit board 12. The frame 18 is made of stainless steel, phosphor bronze or similar metal and adapted to fix the display 16 in place. A box-like battery holder 24 has terminals 15 24a and 24~ and is located in the vicinitY of the printed circuit board 12 to accommodate a battery 26 therein.
The display 16 is securely retained by the metal frame 18 which is in turn located in close proximity to and substantially in parallel with the antenna 2 2. In such an arrangement, the ~ frame 18 lowers the gain of the antenna 22 and thereby reduces the sensitivity of the receiver 10.
Why the arrangement shown in Figs. 1A and lB lowers the antenna gain will be discussed with reference to Fig. 2. As shown, when a metal frame 1 8a is positioned close to and in 25 parallel wlth an antenna element 22a, a current Ii is induced in _5_ 1312921 the metal frame 18a by a current I which flows throu~h the antenna element 22a. The mirror curreIlt Ii is opposite in direction to the current I as illustrated and is, therefore, ~enerally referred to as a mirror current. The resulting magnetic fluxes cancel each other due to the adioinillg antenna element 22a and frame 18a, resulting in the decrease in antenna ~aim In the light of the above, it is a common practice to increase the distance d between the antenna 22 and the metal frame 18 as far as possible or to arran~e the antenna 22 and metal frame 18 in a non-parallel Position. This imposes restriction on the arrangement of the various structural elements to thereby obstruct the miniaturization of a pa~ing receiver, while limiting the design freedom with respect to appearance.
Referrin~ to Fig. 3, a paginX receiver having a display embodyin~ the present invention is shown and generally designated by the reference numeral 30. In the figure, the same o~ similar structural elements as those shown in Figs. 1A and 1B
are designated by like reference numerals. As shown, the receiver 30 is ~enerally made up of a casing 32, a body 34 and a cover 36. The body 34 of the receiver 30 is shown in a plan view in Fig~ 4 and in elevations in Figs. 5A to 5D. As shown in Fig. 3, the casing 32 is provided with an opening or window 38 for display. The cover ~6 is composed of a cover member 40 and a battery cover member 42.
' `' The body 34 of the receiver 30 will be described in detail with reference to Figs. 4 and 5A to 5D. The body 34 includes a printed circuit board 12 on which are moullted a power switch 14, an LCD or similar display 16 for displaying a message or S similar received information, a frame 18 made of stainless steel, phosphor bronze or similar metal and adapted to fix the display 16, a loudspeaker 20 for alerting a person to an incoming call, and a loop antenna 2 2 for efficiently converting an electromagnetic wave into an electric si~nal and feeding the 10 electric signal to a high frequency circuit. Located in the vicinity of the printed circuit board 12 is a battery holder 24 which accommodates a battery 26 therein and has terminals 24a and 24b for connecting the battery 26 to the printed circuit board 12. In Figs. 5A and 5B, a radio section is labeled A while a 5 decoder section and an LCD drive section which serves as a display are generally labeled B. The radio section amplifies, frequency-converts, and demodulates a high frequency signal coming in through the antenna 22, delivering the resulting received signal to the decoder section. In response, the decoder ~0 section feeds information to be displayed on the LCD drive section according to the received signal, and the LCD drive section drives the LCD 16 to display the information.
As stated above, the frame 18 of the illustrative embodiment is made of stainless steel, phosphor bronze or similar metal to ~5 have sufficient mechanical strength and to enhance dense ~7~ 1312921 arrangement of various structural elements and, as in the prior art, it is located in close PrOXimitY to and in parallel with the antenna 22. In the illustrative embodiment, as shown in Fig. 4, a part 18A of the frame 18 is removed in order to eliminate the 5 decrease in antenna gain otherwise caused by the above arrangement. Since the metal frame POrtiOn 1 8A which would effect the antenna 2 2 is absent, a current flowin~ through the antenna 22 does not induce an undesirable mirror current and, therefore, the antenna gain is prevented from being lowered.
While the the battery holder 2 4 has been shown and described as extending perpendicularly to the antenna ~4, the present invention is of course applicable to a pagin~ receiver with a display wherein the battery holder 24 is located in parallel with the antenna 22.
It is to be noted that the present invention is applicable not only to a frame for fixing a display but also to other various structural elements which are apt to lower the antenna gain.
In summary, it will be seen that the present invention provides a paging receiver with a display in which a metal frame ~ located in close PrOximity to and in parallel with an antenna is provided with a unique configuration to insure high sensitivity and ~reat mechanical strength of the receiver. In addition, the positional relationship between the antenna and a display is freed from severe restrictions so that the design freedom with respect 25 to appearance is enhanced.
. . ' ' Various modifications will become possible for those skilled in the art after receiving the teachings of the prese[lt disclosure without departin from the scope thereof.
'~
, '
BACK(~ROUNn OF T~IE INVENTION
The present invention relates to a pa~ing receiYer having a display and, more particularly, to a receiver with a displaY in which a frame made of metal for fixing a display in place is 5 con~i~ured to prevent the ~ain of an antenna from being lowered despite that the metal frame is located in close proximity to the antenna.
A modern paging receiver with a displaY has various advanced functions and has a miniature handy configuration.
10 The miniature design of this kind of paging receiver is accomplished by arranging various elements of the receiver close to ~ach other in a dense configuration. For example, an antenna and a frame for fixing a liquid crystal displaY (LCD) or similar display element are usually positioned in close proximity 15 to each other. Since the frame is generally made of stainless steel, phosPhor bronze or similar metal to have great mechanical stren~th, the metal frame close to the antenna is apt to lower the antenna gain and thereby the sensitivity of the receiver.
There~ore, when the metal fram~ and other members made of ~0 metàl are positioned in the vicinlty of the antenn~, there has to r~
' 70815-~8 be provided some implementation for preventing the antenna gain frQm beiny lowered.
SUMMARY OF THE INVENTION
It is therefore an object of the present in~en~ion to provide a paging receiver having a display which eliminates the decrease in antenna gain ascribable ~o various structural elements ~hich are located close to an an~enna.
It is another object of the present invention to provide a paging receiver with a display which allows a metal frame for fixing a display element to be positioned in close proximity to an ~ntenna ~ithout inviting the decrease in antenna gain.
It is another object of the present invention to provide a generally improved paging receiver having a display.
The present invention provides a receiver comprising: a loop antenna; a plurality of elements for processing a signal received by said antenna; and a metallic member for structurally supporting at least one of said elements, said metallic member having a generally-rectilinear portion located generally in parallel with a longitudinal axis of said loop antenna; said ~a metallic member further having a portion adiacent to said loop antenna, said adjacent portion including a gap of sufficient si7.e to substantially prevent loss of gain of said antenna resulting from mirror current in said metallic member induced by current in said antenna.
B
.
13~2921 BRIEF DESCRIPTION OF THE DRAWINGS
The above and other obiects, features and advantages of the present invl3ntion will become more apparent from the following detailed description taken with the accompanyillg drawings in 5 which:
Fig. lA is a perspective view of a body POrtiOn of a prior art paging receiver having a display, a casing and a cover of the paging receiver being omitted for clarity;
Fig. lB is a plan view of the paging receiver bodY portion 10 shown in Fig. lA;
Fig. 2 is a view useful for understanding why the antenna ~ain is loweredi Fig. 3 is an exploded perspective view of a paging receiver having a displaY em~odYing the present invention;
Fig. 4 is a plan view of a body portion of the paging receiver shown in Fi~. 3;
Fig. 5A is a front view as seen in a direction VA-YA of Fig. 4;
Fig. SB is a rear view as seen in a direction YB-YB of 20 Fig. 4;
Fig. 5C is a side elevation as seen in a direction VC-YC of Fig. 4; and Fig. 5D is a side elevation as seen in a direction YD-YD of Fig. 4.
- . .
. ,: . .
. .
' ~
~, . . .
DESCRIPTION OF THE PREFERRED EMBODIMENTS
To better understand the present invention, a prior art paging receiver with a display and why the antenna gain is lowered when a metal frame for fixin~ a display is located close 5 to an antenna will be described with reference to Fi~s. lA, lB and 2.
Referring to Figs. lA and lB, a body of a prior art paging receiver 10 includes a printed circuit board 12 which is loaded with various structural elements of the receiver 10. Specifically, 10 a power switch 14, an LCD or similar display 16, a metal frame 18, a loudspeaker 2 0 and an antenna 2 2 are arran~ed on th~
printed circuit board 12. The frame 18 is made of stainless steel, phosphor bronze or similar metal and adapted to fix the display 16 in place. A box-like battery holder 24 has terminals 15 24a and 24~ and is located in the vicinitY of the printed circuit board 12 to accommodate a battery 26 therein.
The display 16 is securely retained by the metal frame 18 which is in turn located in close proximity to and substantially in parallel with the antenna 2 2. In such an arrangement, the ~ frame 18 lowers the gain of the antenna 22 and thereby reduces the sensitivity of the receiver 10.
Why the arrangement shown in Figs. 1A and lB lowers the antenna gain will be discussed with reference to Fig. 2. As shown, when a metal frame 1 8a is positioned close to and in 25 parallel wlth an antenna element 22a, a current Ii is induced in _5_ 1312921 the metal frame 18a by a current I which flows throu~h the antenna element 22a. The mirror curreIlt Ii is opposite in direction to the current I as illustrated and is, therefore, ~enerally referred to as a mirror current. The resulting magnetic fluxes cancel each other due to the adioinillg antenna element 22a and frame 18a, resulting in the decrease in antenna ~aim In the light of the above, it is a common practice to increase the distance d between the antenna 22 and the metal frame 18 as far as possible or to arran~e the antenna 22 and metal frame 18 in a non-parallel Position. This imposes restriction on the arrangement of the various structural elements to thereby obstruct the miniaturization of a pa~ing receiver, while limiting the design freedom with respect to appearance.
Referrin~ to Fig. 3, a paginX receiver having a display embodyin~ the present invention is shown and generally designated by the reference numeral 30. In the figure, the same o~ similar structural elements as those shown in Figs. 1A and 1B
are designated by like reference numerals. As shown, the receiver 30 is ~enerally made up of a casing 32, a body 34 and a cover 36. The body 34 of the receiver 30 is shown in a plan view in Fig~ 4 and in elevations in Figs. 5A to 5D. As shown in Fig. 3, the casing 32 is provided with an opening or window 38 for display. The cover ~6 is composed of a cover member 40 and a battery cover member 42.
' `' The body 34 of the receiver 30 will be described in detail with reference to Figs. 4 and 5A to 5D. The body 34 includes a printed circuit board 12 on which are moullted a power switch 14, an LCD or similar display 16 for displaying a message or S similar received information, a frame 18 made of stainless steel, phosphor bronze or similar metal and adapted to fix the display 16, a loudspeaker 20 for alerting a person to an incoming call, and a loop antenna 2 2 for efficiently converting an electromagnetic wave into an electric si~nal and feeding the 10 electric signal to a high frequency circuit. Located in the vicinity of the printed circuit board 12 is a battery holder 24 which accommodates a battery 26 therein and has terminals 24a and 24b for connecting the battery 26 to the printed circuit board 12. In Figs. 5A and 5B, a radio section is labeled A while a 5 decoder section and an LCD drive section which serves as a display are generally labeled B. The radio section amplifies, frequency-converts, and demodulates a high frequency signal coming in through the antenna 22, delivering the resulting received signal to the decoder section. In response, the decoder ~0 section feeds information to be displayed on the LCD drive section according to the received signal, and the LCD drive section drives the LCD 16 to display the information.
As stated above, the frame 18 of the illustrative embodiment is made of stainless steel, phosphor bronze or similar metal to ~5 have sufficient mechanical strength and to enhance dense ~7~ 1312921 arrangement of various structural elements and, as in the prior art, it is located in close PrOXimitY to and in parallel with the antenna 22. In the illustrative embodiment, as shown in Fig. 4, a part 18A of the frame 18 is removed in order to eliminate the 5 decrease in antenna gain otherwise caused by the above arrangement. Since the metal frame POrtiOn 1 8A which would effect the antenna 2 2 is absent, a current flowin~ through the antenna 22 does not induce an undesirable mirror current and, therefore, the antenna gain is prevented from being lowered.
While the the battery holder 2 4 has been shown and described as extending perpendicularly to the antenna ~4, the present invention is of course applicable to a pagin~ receiver with a display wherein the battery holder 24 is located in parallel with the antenna 22.
It is to be noted that the present invention is applicable not only to a frame for fixing a display but also to other various structural elements which are apt to lower the antenna gain.
In summary, it will be seen that the present invention provides a paging receiver with a display in which a metal frame ~ located in close PrOximity to and in parallel with an antenna is provided with a unique configuration to insure high sensitivity and ~reat mechanical strength of the receiver. In addition, the positional relationship between the antenna and a display is freed from severe restrictions so that the design freedom with respect 25 to appearance is enhanced.
. . ' ' Various modifications will become possible for those skilled in the art after receiving the teachings of the prese[lt disclosure without departin from the scope thereof.
'~
, '
Claims (4)
1. A receiver comprising, a loop antenna; a plurality of elements for processing a signal received by said antenna; and a metallic member for structurally supporting at least one of said elements, said metallic member having a generally-rectilinear portion located generally in parallel with a longitudinal axis of said loop antenna; said metallic member further having a portion adjacent to said loop antenna, said adjacent portion including a gap of sufficient size to substantially prevent loss of gain of said antenna resulting from mirror current in said metallic member induced by current in said antenna.
2. A receiver as defined in claim 1, wherein said receiver comprises a paging receiver.
3. A receiver comprising: a loop antenna; a display device for displaying information received by said antenna; and a metallic member for structurally supporting said display device, said metallic member having a generally-rectilinear portion located generally in parallel with a longitudinal axis of said loop antenna; said metallic member further having a portion adjacent to said loop antenna, said adjacent portion including a gap of sufficient size to substantially prevent loss of gain of said antenna resulting from mirror current in said metallic member induced by current in said antenna.
4. A receiver as defined in claim 3, wherein said receiver comprises a paging receiver.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63-52175 | 1988-03-04 | ||
| JP63052175A JP2806525B2 (en) | 1988-03-04 | 1988-03-04 | Receiver with display function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1312921C true CA1312921C (en) | 1993-01-19 |
Family
ID=12907479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000592760A Expired - Fee Related CA1312921C (en) | 1988-03-04 | 1989-03-03 | Paging receiver having a display |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4955084A (en) |
| JP (1) | JP2806525B2 (en) |
| KR (1) | KR920001536B1 (en) |
| AU (1) | AU608493B2 (en) |
| CA (1) | CA1312921C (en) |
| GB (1) | GB2217538B (en) |
| HK (1) | HK19293A (en) |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02116228A (en) * | 1988-10-26 | 1990-04-27 | Nec Corp | Portable radio equipment |
| US5043721A (en) * | 1989-12-18 | 1991-08-27 | Hewlett-Packard Company | Paging accessory for portable information/computing devices |
| US5589840A (en) * | 1991-11-05 | 1996-12-31 | Seiko Epson Corporation | Wrist-type wireless instrument and antenna apparatus |
| JPH05335826A (en) * | 1991-11-18 | 1993-12-17 | Motorola Inc | Built-in antenna for communication equipment |
| US5841402A (en) * | 1992-03-27 | 1998-11-24 | Norand Corporation | Antenna means for hand-held radio devices |
| WO1994008361A1 (en) * | 1992-09-30 | 1994-04-14 | Motorola, Inc. | Low profile antenna system for a card-like communication receiver |
| US5757326A (en) * | 1993-03-29 | 1998-05-26 | Seiko Epson Corporation | Slot antenna device and wireless apparatus employing the antenna device |
| US5485166A (en) * | 1993-05-27 | 1996-01-16 | Savi Technology, Inc. | Efficient electrically small loop antenna with a planar base element |
| DE4328867C2 (en) * | 1993-08-27 | 1995-07-13 | Blumenbecker B & M Gmbh | Transportable device for sending confirmation signals |
| US5585806A (en) * | 1993-12-28 | 1996-12-17 | Mitsumi Electric Co., Ltd. | Flat antenna apparatus having a shielded circuit board |
| JP3417083B2 (en) * | 1994-10-04 | 2003-06-16 | セイコーエプソン株式会社 | Portable radio |
| US6660948B2 (en) | 2001-02-28 | 2003-12-09 | Vip Investments Ltd. | Switch matrix |
| US7755506B1 (en) | 2003-09-03 | 2010-07-13 | Legrand Home Systems, Inc. | Automation and theater control system |
| US7778262B2 (en) | 2005-09-07 | 2010-08-17 | Vantage Controls, Inc. | Radio frequency multiple protocol bridge |
| US20070109208A1 (en) * | 2005-11-16 | 2007-05-17 | Microsoft Corporation | Antenna in a shielded enclosure |
| JP4311576B2 (en) * | 2005-11-18 | 2009-08-12 | ソニー・エリクソン・モバイルコミュニケーションズ株式会社 | Folded dipole antenna device and portable radio terminal |
| US7642964B2 (en) * | 2006-10-27 | 2010-01-05 | Motorola, Inc. | Low profile internal antenna |
| US8193993B2 (en) * | 2006-11-20 | 2012-06-05 | Motorola Mobility, Inc. | Antenna sub-assembly for electronic device |
| EP1923951A1 (en) * | 2006-11-20 | 2008-05-21 | Motorola, Inc. | Antenna sub-assembly for electronic device |
| US8542155B2 (en) | 2011-07-29 | 2013-09-24 | Brady Worldwide, Inc. | Wireless communications device and housing for a wireless communications device |
| KR102258191B1 (en) * | 2014-11-13 | 2021-05-28 | 삼성전자주식회사 | Electronic device |
| DE102015115574A1 (en) * | 2014-11-13 | 2016-05-19 | Samsung Electronics Co., Ltd. | Near field communication chip embedded in a portable electronic device and portable electronic device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56169401A (en) * | 1980-05-31 | 1981-12-26 | Shuichi Sakai | Antenna for wrist watch type receiver |
| JPS57190429A (en) * | 1981-05-18 | 1982-11-24 | Nec Corp | Portable radio receiver |
| JPS6171702A (en) * | 1984-09-17 | 1986-04-12 | Matsushita Electric Ind Co Ltd | Small-sized antenna |
| JPS6284237U (en) * | 1985-11-11 | 1987-05-29 | ||
| JPS62193341U (en) * | 1986-05-30 | 1987-12-09 | ||
| US4814776A (en) * | 1987-09-10 | 1989-03-21 | Motorola, Inc. | Optimally grounded small loop antenna |
| JPH01307302A (en) * | 1988-06-06 | 1989-12-12 | Nec Corp | Loop antenna for portable radio equipment |
-
1988
- 1988-03-04 JP JP63052175A patent/JP2806525B2/en not_active Expired - Lifetime
-
1989
- 1989-03-02 US US07/317,748 patent/US4955084A/en not_active Expired - Fee Related
- 1989-03-02 GB GB8904721A patent/GB2217538B/en not_active Expired - Fee Related
- 1989-03-03 CA CA000592760A patent/CA1312921C/en not_active Expired - Fee Related
- 1989-03-03 KR KR8902611A patent/KR920001536B1/en not_active IP Right Cessation
- 1989-03-03 AU AU30989/89A patent/AU608493B2/en not_active Ceased
-
1993
- 1993-03-11 HK HK192/93A patent/HK19293A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR890015063A (en) | 1989-10-28 |
| AU608493B2 (en) | 1991-03-28 |
| HK19293A (en) | 1993-03-19 |
| KR920001536B1 (en) | 1992-02-18 |
| JPH01226222A (en) | 1989-09-08 |
| GB2217538A (en) | 1989-10-25 |
| GB8904721D0 (en) | 1989-04-12 |
| JP2806525B2 (en) | 1998-09-30 |
| GB2217538B (en) | 1992-04-08 |
| US4955084A (en) | 1990-09-04 |
| AU3098989A (en) | 1989-09-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |