US20020149523A1 - Antenna for an electronic device - Google Patents
Antenna for an electronic device Download PDFInfo
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- US20020149523A1 US20020149523A1 US09/950,837 US95083701A US2002149523A1 US 20020149523 A1 US20020149523 A1 US 20020149523A1 US 95083701 A US95083701 A US 95083701A US 2002149523 A1 US2002149523 A1 US 2002149523A1
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- grounding
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- 230000008878 coupling Effects 0.000 claims description 16
- 238000010168 coupling process Methods 0.000 claims description 16
- 238000005859 coupling reaction Methods 0.000 claims description 16
- 230000001413 cellular effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
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Classifications
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- 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
- H01Q1/2258—Supports; Mounting means by structural association with other equipment or articles used with computer equipment
- H01Q1/2266—Supports; Mounting means by structural association with other equipment or articles used with computer equipment disposed inside the computer
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1615—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function
- G06F1/1616—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
- G06F1/1675—Miscellaneous details related to the relative movement between the different enclosures or enclosure parts
- G06F1/1681—Details related solely to hinges
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
- G06F1/1684—Constructional details or arrangements related to integrated I/O peripherals not covered by groups G06F1/1635 - G06F1/1675
- G06F1/1698—Constructional details or arrangements related to integrated I/O peripherals not covered by groups G06F1/1635 - G06F1/1675 the I/O peripheral being a sending/receiving arrangement to establish a cordless communication link, e.g. radio or infrared link, integrated cellular phone
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- 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
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
-
- 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
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0442—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular tuning means
-
- 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
- H01Q9/06—Details
- H01Q9/14—Length of element or elements adjustable
Definitions
- This invention relates to an antenna for an electronic device.
- Wireless communication devices such as cellular phones, notebook computers, electronic appliances, and the like, are normally installed with an antenna that serves as a medium for transmission and reception of electromagnetic signals.
- the antenna can be built outside or inside the devices.
- the latter built-in type are more attractive due to a tendency of folding and breaking for the former upon use.
- FIG. 1 illustrates a conventional plate-type antenna 1 which is commonly known as PIFA (Planar Inverted-F Antenna) and which includes a rectangular conductive radiating plate 11 , a rectangular conductive grounding plate 12 that is vertically spaced apart from and that is electrically connected to the radiating plate 11 via a conductive grounding leg 13 , and a conductive signal feeding leg 14 that projects from one side of the radiating plate 11 and through an opening in the grounding plate 12 (the signal feeding leg 14 is spaced apart from the grounding plate 12 ) and that is adapted to be electrically connected to an electromagnetic transmitter and an electromagnetic receiver (not shown).
- PIFA Planar Inverted-F Antenna
- Frequency, input impedance, and bandwidth are key parameters for the design of an antenna for a specific use, and are mainly, but not exclusively, related to the dimension of the radiating plate 11 , the dimension of the grounding plate 12 , and the position of the electrical contact between the signal feeding leg 14 and the radiating plate 11 .
- the parameters are interrelated such that a modification in one of the parameters causes corresponding changes in the other two.
- the aforesaid conventional antenna is disadvantageous in that since the dimension of the radiating plate 11 , the dimension of the grounding plate 12 , and the position of the electrical contact between the signal feeding leg 14 and the radiating plate 11 are all fixed, it can only be used for a specific application that requires a specific frequency, input impedance, and bandwidth, and thus lacks flexibility.
- a plate-type antenna for an electronic device.
- the plate-type antenna comprises: a conductive radiating plate unit; a conductive grounding plate unit vertically spaced apart from and electrically connected to the radiating plate unit; and a conductive signal feeding leg electrically connected to the radiating plate unit, spaced apart from the grounding plate unit, and adapted to be connected to an electromagnetic transmitter and an electromagnetic receiver. At least one of the radiating plate unit and the grounding plate unit is extendable to adjust the behavior of the antenna.
- a slot-type antenna for an electronic device.
- the slot-type antenna comprises: a conductive main plate extending in a longitudinal direction, formed with a slot, and having a first plate portion that surrounds the slot and that defines a periphery of the slot, and a second plate portion that extends from one side of the first plate portion in a transverse direction relative to the longitudinal direction; a conductive signal feeding leg electrically connected to the first plate portion of the main plate and adapted to be connected to an electromagnetic transmitter and an electromagnetic receiver; and a conductive extension plate electrically, adjustably, and selectively connected to one of the first and second plate portions so as to permit extension and retraction of the main plate in the longitudinal direction and vary the dimension of the slot that is exposed from the main plate and the extension plate when the extension plate is connected to the first plate portion, and so as to permit extension and retraction of the main plate in the transverse direction when the extension plate is connected to the second plate portion.
- FIG. 1 is a perspective view of a conventional plate-type antenna
- FIG. 2 is a perspective view of a preferred embodiment of a plate-type antenna of this invention.
- FIG. 3 is a fragmentary perspective view of the plate-type antenna of FIG. 2;
- FIG. 4 is a fragmentary perspective view of another preferred embodiment of the plate-type antenna modified from the embodiment of FIG. 2;
- FIG. 5 is a top view of a preferred embodiment of a slot-type antenna of this invention.
- FIG. 6 is a perspective view of an electronic device with the plate-type antenna of FIG. 2;
- FIG. 7 is an enlarged cutaway view of a portion encircled in FIG. 6.
- FIGS. 2 and 3 illustrate a preferred embodiment of a plate-type antenna 2 of this invention.
- the plate-type antenna 2 includes: a conductive radiating plate unit 6 ; a conductive grounding plate unit 3 vertically spaced apart from and electrically connected to the radiating plate unit 6 via a conductive grounding leg 70 ; and a conductive signal feeding leg 91 electrically connected to the radiating plate unit 6 , spaced apart from the grounding plate unit 3 , and adapted to be connected to an electromagnetic transmitter and an electromagnetic receiver (not shown).
- the radiating plate unit 6 and the grounding plate unit 3 are extendable in a longitudinal direction (A).
- the plate-type antenna 2 is characterized in that tuning of the communication frequency of the same is mainly achieved by adjustment of the dimension of the radiating plate unit 6 , that tuning of the communication bandwidth of the same is mainly achieved by adjustment of the dimension of the grounding plate unit 3 , and that adjustment of the input impedance of the same is mainly achieved by varying the position of electrical contact between the signal feeding leg 91 and the radiating plate unit 6 .
- the radiating plate unit 6 includes rectangular first and second radiating plates 7 , 8 .
- a radiating coupling unit of the antenna 2 includes a plurality of retaining holes 751 formed in the first radiating plate 7 and aligned in the longitudinal direction (A) at two opposite sides 73 , 74 of the first radiating plate 7 , and a pair of spaced apart retaining protrusions 851 projecting from the second radiating plate 8 and selectively into one of the retaining holes 751 so as to permit extension and retraction of the radiating plate unit 6 in the longitudinal direction (A) and so as to couple the first and second radiating plates 7 , 8 in a manner that the first and second radiating plates 7 , 8 are in face-to-face contact with each other.
- the retaining holes 751 and the retaining protrusions 851 can be respectively and selectively formed in or on the first and second radiating plates 7 , 8 .
- the grounding plate unit 3 includes rectangular first and second grounding plates 4 , 5 .
- a grounding coupling unit of the antenna 2 includes a plurality of retaining holes 451 formed in the first grounding plate 4 and aligned in the longitudinal direction at two opposite sides 43 , 44 of the first grounding plate 4 , and a pair of spaced apart retaining protrusions 551 projecting from the second grounding plate 5 and selectively into one of the retaining holes 451 so as to permit extension and retraction of the grounding plate unit 3 in the longitudinal direction (A) and so as to couple the first and second grounding plates 4 , 5 in a manner that the first and second grounding plates 4 , 5 are in face-to-face contact with each other.
- the retaining holes 451 and the retaining protrusions 551 can be respectively and selectively formed in or on the first and second grounding plates 4 , 5 .
- the first radiating plate 7 is provided with a tab 78 projecting downwardly from one of the two opposite sides 73 of the first radiating plate 7 .
- the first grounding plate 4 is formed with an elongated opening 48 that is vertically aligned with the tab 78 .
- the antenna 2 further includes a signal coupling unit that includes a plurality of retaining holes 781 formed in the tab 78 and aligned in the longitudinal direction (A), and a retaining protrusion 913 projecting from the signal feeding leg 91 and selectively into one of the retaining holes 781 so as to form an electrical connection between the signal feeding leg 91 and the first radiating plate 7 that is adjustable in the longitudinal direction (A).
- the signal feeding leg 91 extends through the elongated opening 48 to connect with a coaxial cable 9 which is to be connected to a transmitter and a receiver (not shown).
- FIG. 4 illustrates another preferred embodiment of the plate-type antenna 2 modified from that shown in FIG. 2.
- the second radiating plate 8 is fan-shaped, and the retaining holes 751 are aligned along an arcuate line.
- the design of the plate-type antenna 2 of this invention permits adjustment of the dimension of the radiating plate unit 6 , the dimension of the grounding plate unit 3 , and the position of the electrical contact between the signal feeding leg 91 and the radiating plate unit 6 , thereby eliminating the drawbacks as encountered in the prior art.
- the plate-type antenna 2 of this invention can be adapted to the Bluetooth communication system which has a bandwidth in a range of from 2.4 to 2.5 GHz and a frequency of 2.45 GHz.
- FIG. 5 illustrates a preferred embodiment of a slot-type antenna 2 ′ of this invention.
- the slot-type antenna 2 ′ includes: a conductive main plate 20 ′ extending in a longitudinal direction (D), formed with a slot 21 ′, and having a first plate portion 22 ′ that surrounds the slot 21 ′ and that defines a periphery of the slot 21 ′, and a second plate portion 23 ′ that extends from one side of the first plate portion 22 ′ in a transverse direction (E) relative to the longitudinal direction (D); a conductive signal feeding leg 91 ′ electrically connected to the first plate portion 22 ′ of the main plate 20 ′ at one side of the slot 21 ′ that is opposite to the second plate portion 23 ′ and adapted to be connected to an electromagnetic transmitter and an electromagnetic receiver (not shown) a conductive first extension plate 8 ′ electrically and adjustably connected to the first plate portion 22 ′ so as to permit extension and retraction of the main plate 20 ′ in the longitudinal direction (D) and
- the slot-type antenna 2 ′ is characterized in that tuning of the communication frequency of the same is mainly achieved by adjustment of the dimension of the slot 21 ′, that tuning of the communication bandwidth of the same is mainly achieved by adjustment of the dimension of the second plate portion 23 ′ of the main plate 20 ′, and that adjustment of the input impedance of the same is mainly achieved by varying the position of electrical contact between the signal feeding leg 91 ′ and the second plate portion 22 ′ of the main plate 20 ′.
- a first coupling unit of the antenna 2 ′ includes a plurality of retaining holes 221 ′ formed in the first plate portion 22 ′ of the main plate 20 ′ and aligned in the longitudinal direction (D), and a pair of retaining protrusions 811 ′ projecting from the first extension plate 8 ′ and selectively into one of the retaining holes 221 ′ so as to permit extension and retraction of the main plate 20 ′ along the longitudinal direction (D).
- a second coupling unit of the antenna 2 ′ includes a plurality of retaining holes 331 ′ formed in the second plate portion 23 ′ and aligned in the transverse direction (E), and a pair of retaining protrusions 511 ′ projecting from the second extension plate 5 ′ and selectively into one of the retaining holes 331 ′ so as to permit extension and retraction of the main plate 20 ′ along the transverse direction (E).
- a third coupling unit of the antenna 2 ′ includes a plurality of retaining holes 231 ′ formed in the first plate portion 22 ′ of the main plate 20 ′ and aligned in the longitudinal direction (D), and a protrusion 933 ′ projecting from the signal feeding leg 91 ′ and selectively into one of the retaining holes 231 ′ so as to form an electrical connection between the signal feeding leg 91 ′ and the first plate portion 22 ′ of the main plate 20 ′ that is adjustable along the longitudinal direction (D).
- a coaxial cable 90 ′ has a conductive inner core 92 ′ that is electrically connected to the signal feeding leg 91 ′, and a conductive grounding wire mesh 93 ′ that is radially spaced apart from the inner core 92 ′ via a dielectric sheath and that is electrically connected to the main plate 20 ′.
- the slot-type antenna 2 ′ can eliminate the drawbacks as encountered in the prior art.
- FIGS. 6 and 7 illustrate a notebook computer with the plate-type antenna of FIG. 2.
- the notebook computer includes a housing 97 and a circuit board 98 mounted in the housing 97 .
- the housing 97 includes two opposing hinge housing portions 971 .
- the plate-type antenna 2 is mounted in one of the hinge housing portions 971 via screw means 983 .
- the signal feeding leg 91 is electrically connected to the circuit board 98 via the cable 9 so as to provide the notebook computer with a wireless communication feature.
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Waveguide Aerials (AREA)
Abstract
Description
- This application claims priority of Taiwan patent Application No. 90205625, filed on Apr. 11, 2001.
- 1. Field of the Invention
- This invention relates to an antenna for an electronic device.
- 2. Description of the Related Art
- Wireless communication devices, such as cellular phones, notebook computers, electronic appliances, and the like, are normally installed with an antenna that serves as a medium for transmission and reception of electromagnetic signals. The antenna can be built outside or inside the devices. However, the latter (built-in type) are more attractive due to a tendency of folding and breaking for the former upon use.
- FIG. 1 illustrates a conventional plate-
type antenna 1 which is commonly known as PIFA (Planar Inverted-F Antenna) and which includes a rectangular conductiveradiating plate 11, a rectangularconductive grounding plate 12 that is vertically spaced apart from and that is electrically connected to theradiating plate 11 via aconductive grounding leg 13, and a conductivesignal feeding leg 14 that projects from one side of theradiating plate 11 and through an opening in the grounding plate 12 (thesignal feeding leg 14 is spaced apart from the grounding plate 12) and that is adapted to be electrically connected to an electromagnetic transmitter and an electromagnetic receiver (not shown). - Frequency, input impedance, and bandwidth are key parameters for the design of an antenna for a specific use, and are mainly, but not exclusively, related to the dimension of the
radiating plate 11, the dimension of thegrounding plate 12, and the position of the electrical contact between thesignal feeding leg 14 and theradiating plate 11. The parameters are interrelated such that a modification in one of the parameters causes corresponding changes in the other two. - The aforesaid conventional antenna is disadvantageous in that since the dimension of the
radiating plate 11, the dimension of thegrounding plate 12, and the position of the electrical contact between thesignal feeding leg 14 and theradiating plate 11 are all fixed, it can only be used for a specific application that requires a specific frequency, input impedance, and bandwidth, and thus lacks flexibility. - Therefore, it is an object of the present invention to provide a plate-type antenna that is capable of overcoming the aforementioned drawbacks.
- It is another object of the present invention to provide a slot-type antenna that is capable of overcoming the aforementioned drawbacks.
- According to one aspect of this invention, there is provided a plate-type antenna for an electronic device. The plate-type antenna comprises: a conductive radiating plate unit; a conductive grounding plate unit vertically spaced apart from and electrically connected to the radiating plate unit; and a conductive signal feeding leg electrically connected to the radiating plate unit, spaced apart from the grounding plate unit, and adapted to be connected to an electromagnetic transmitter and an electromagnetic receiver. At least one of the radiating plate unit and the grounding plate unit is extendable to adjust the behavior of the antenna.
- According to another aspect of this invention, there is provided a slot-type antenna for an electronic device. The slot-type antenna comprises: a conductive main plate extending in a longitudinal direction, formed with a slot, and having a first plate portion that surrounds the slot and that defines a periphery of the slot, and a second plate portion that extends from one side of the first plate portion in a transverse direction relative to the longitudinal direction; a conductive signal feeding leg electrically connected to the first plate portion of the main plate and adapted to be connected to an electromagnetic transmitter and an electromagnetic receiver; and a conductive extension plate electrically, adjustably, and selectively connected to one of the first and second plate portions so as to permit extension and retraction of the main plate in the longitudinal direction and vary the dimension of the slot that is exposed from the main plate and the extension plate when the extension plate is connected to the first plate portion, and so as to permit extension and retraction of the main plate in the transverse direction when the extension plate is connected to the second plate portion.
- In drawings which illustrate embodiments of the invention,
- FIG. 1 is a perspective view of a conventional plate-type antenna;
- FIG. 2 is a perspective view of a preferred embodiment of a plate-type antenna of this invention;
- FIG. 3 is a fragmentary perspective view of the plate-type antenna of FIG. 2;
- FIG. 4 is a fragmentary perspective view of another preferred embodiment of the plate-type antenna modified from the embodiment of FIG. 2;
- FIG. 5 is a top view of a preferred embodiment of a slot-type antenna of this invention;
- FIG. 6 is a perspective view of an electronic device with the plate-type antenna of FIG. 2; and
- FIG. 7 is an enlarged cutaway view of a portion encircled in FIG. 6.
- FIGS. 2 and 3 illustrate a preferred embodiment of a plate-
type antenna 2 of this invention. The plate-type antenna 2 includes: a conductiveradiating plate unit 6; a conductivegrounding plate unit 3 vertically spaced apart from and electrically connected to theradiating plate unit 6 via aconductive grounding leg 70; and a conductivesignal feeding leg 91 electrically connected to theradiating plate unit 6, spaced apart from thegrounding plate unit 3, and adapted to be connected to an electromagnetic transmitter and an electromagnetic receiver (not shown). Theradiating plate unit 6 and thegrounding plate unit 3 are extendable in a longitudinal direction (A). The plate-type antenna 2 is characterized in that tuning of the communication frequency of the same is mainly achieved by adjustment of the dimension of theradiating plate unit 6, that tuning of the communication bandwidth of the same is mainly achieved by adjustment of the dimension of thegrounding plate unit 3, and that adjustment of the input impedance of the same is mainly achieved by varying the position of electrical contact between thesignal feeding leg 91 and theradiating plate unit 6. - The
radiating plate unit 6 includes rectangular first and secondradiating plates antenna 2 includes a plurality of retainingholes 751 formed in the firstradiating plate 7 and aligned in the longitudinal direction (A) at twoopposite sides radiating plate 7, and a pair of spaced apart retainingprotrusions 851 projecting from the secondradiating plate 8 and selectively into one of theretaining holes 751 so as to permit extension and retraction of theradiating plate unit 6 in the longitudinal direction (A) and so as to couple the first and secondradiating plates radiating plates holes 751 and theretaining protrusions 851 can be respectively and selectively formed in or on the first and secondradiating plates - The
grounding plate unit 3 includes rectangular first andsecond grounding plates antenna 2 includes a plurality of retainingholes 451 formed in thefirst grounding plate 4 and aligned in the longitudinal direction at twoopposite sides first grounding plate 4, and a pair of spaced apart retainingprotrusions 551 projecting from thesecond grounding plate 5 and selectively into one of the retainingholes 451 so as to permit extension and retraction of thegrounding plate unit 3 in the longitudinal direction (A) and so as to couple the first andsecond grounding plates second grounding plates holes 451 and theretaining protrusions 551 can be respectively and selectively formed in or on the first andsecond grounding plates - The first
radiating plate 7 is provided with atab 78 projecting downwardly from one of the twoopposite sides 73 of the firstradiating plate 7. Thefirst grounding plate 4 is formed with anelongated opening 48 that is vertically aligned with thetab 78. Theantenna 2 further includes a signal coupling unit that includes a plurality of retainingholes 781 formed in thetab 78 and aligned in the longitudinal direction (A), and aretaining protrusion 913 projecting from thesignal feeding leg 91 and selectively into one of theretaining holes 781 so as to form an electrical connection between thesignal feeding leg 91 and the firstradiating plate 7 that is adjustable in the longitudinal direction (A). Thesignal feeding leg 91 extends through theelongated opening 48 to connect with acoaxial cable 9 which is to be connected to a transmitter and a receiver (not shown). - FIG. 4 illustrates another preferred embodiment of the plate-
type antenna 2 modified from that shown in FIG. 2. Instead of being rectangular in shape and being aligned in the longitudinal direction, the secondradiating plate 8 is fan-shaped, and theretaining holes 751 are aligned along an arcuate line. - The design of the plate-
type antenna 2 of this invention permits adjustment of the dimension of theradiating plate unit 6, the dimension of thegrounding plate unit 3, and the position of the electrical contact between thesignal feeding leg 91 and theradiating plate unit 6, thereby eliminating the drawbacks as encountered in the prior art. The plate-type antenna 2 of this invention can be adapted to the Bluetooth communication system which has a bandwidth in a range of from 2.4 to 2.5 GHz and a frequency of 2.45 GHz. - FIG. 5 illustrates a preferred embodiment of a slot-
type antenna 2′ of this invention. The slot-type antenna 2′ includes: a conductivemain plate 20′ extending in a longitudinal direction (D), formed with aslot 21′, and having afirst plate portion 22′ that surrounds theslot 21′ and that defines a periphery of theslot 21′, and asecond plate portion 23′ that extends from one side of thefirst plate portion 22′ in a transverse direction (E) relative to the longitudinal direction (D); a conductivesignal feeding leg 91′ electrically connected to thefirst plate portion 22′ of themain plate 20′ at one side of theslot 21′ that is opposite to thesecond plate portion 23′ and adapted to be connected to an electromagnetic transmitter and an electromagnetic receiver (not shown) a conductivefirst extension plate 8′ electrically and adjustably connected to thefirst plate portion 22′ so as to permit extension and retraction of themain plate 20′ in the longitudinal direction (D) and vary the dimension of theslot 21′ that is exposed from themain plate 20′ and thefirst extension plate 8′; and a conductivesecond extension plate 5′ electrically and adjustably connected to thesecond plate portion 23′ so as to permit extension and retraction of themain plate 20′ in the transverse direction (E). The slot-type antenna 2′ is characterized in that tuning of the communication frequency of the same is mainly achieved by adjustment of the dimension of theslot 21′, that tuning of the communication bandwidth of the same is mainly achieved by adjustment of the dimension of thesecond plate portion 23′ of themain plate 20′, and that adjustment of the input impedance of the same is mainly achieved by varying the position of electrical contact between thesignal feeding leg 91′ and thesecond plate portion 22′ of themain plate 20′. - A first coupling unit of the
antenna 2′ includes a plurality of retainingholes 221′ formed in thefirst plate portion 22′ of themain plate 20′ and aligned in the longitudinal direction (D), and a pair ofretaining protrusions 811′ projecting from thefirst extension plate 8′ and selectively into one of the retainingholes 221′ so as to permit extension and retraction of themain plate 20′ along the longitudinal direction (D). - A second coupling unit of the
antenna 2′ includes a plurality of retainingholes 331′ formed in thesecond plate portion 23′ and aligned in the transverse direction (E), and a pair ofretaining protrusions 511′ projecting from thesecond extension plate 5′ and selectively into one of the retainingholes 331′ so as to permit extension and retraction of themain plate 20′ along the transverse direction (E). - A third coupling unit of the
antenna 2′ includes a plurality of retainingholes 231′ formed in thefirst plate portion 22′ of themain plate 20′ and aligned in the longitudinal direction (D), and aprotrusion 933′ projecting from thesignal feeding leg 91′ and selectively into one of theretaining holes 231′ so as to form an electrical connection between thesignal feeding leg 91′ and thefirst plate portion 22′ of themain plate 20′ that is adjustable along the longitudinal direction (D). Acoaxial cable 90′ has a conductive inner core 92′ that is electrically connected to thesignal feeding leg 91′, and a conductivegrounding wire mesh 93′ that is radially spaced apart from the inner core 92′ via a dielectric sheath and that is electrically connected to themain plate 20′. - Similar to the plate-
type antenna 2 of this invention, the slot-type antenna 2′ can eliminate the drawbacks as encountered in the prior art. - The
antenna housing 97 and acircuit board 98 mounted in thehousing 97. Thehousing 97 includes two opposinghinge housing portions 971. The plate-type antenna 2 is mounted in one of thehinge housing portions 971 via screw means 983. Thesignal feeding leg 91 is electrically connected to thecircuit board 98 via thecable 9 so as to provide the notebook computer with a wireless communication feature. - With the invention thus explained, it is apparent that various modifications and variations can be made without departing from the spirit of the present invention.
Claims (15)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US13/182,857 US8488173B2 (en) | 1997-08-14 | 2011-07-14 | Distributed computer architecture and process for document management |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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TW090205625U TW579077U (en) | 2001-04-11 | 2001-04-11 | Tunable antenna for radio transceiver device |
TW090205625 | 2001-04-11 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US09/950,738 Continuation-In-Part US6645087B2 (en) | 1997-08-14 | 2001-09-13 | Golf club head |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US95091197A Continuation-In-Part | 1996-10-18 | 1997-10-15 |
Publications (2)
Publication Number | Publication Date |
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US20020149523A1 true US20020149523A1 (en) | 2002-10-17 |
US6473042B1 US6473042B1 (en) | 2002-10-29 |
Family
ID=21682892
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US09/950,837 Expired - Lifetime US6473042B1 (en) | 1997-08-14 | 2001-09-13 | Antenna for an electronic device |
Country Status (2)
Country | Link |
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US (1) | US6473042B1 (en) |
TW (1) | TW579077U (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1439609A1 (en) * | 2003-01-20 | 2004-07-21 | Alps Electric Co., Ltd. | Dual band antenna |
US20040239564A1 (en) * | 2002-03-28 | 2004-12-02 | Misako Sakae | Antenna and electronic apparatus using it |
US20050179598A1 (en) * | 2004-02-17 | 2005-08-18 | Alcatel | Multipolarization radiating device with orthogonal feed via surface field line(S) |
US20060033667A1 (en) * | 2002-02-13 | 2006-02-16 | Greg Johnson | Oriented PIFA-type device and method of use for reducing RF interference |
WO2006087025A2 (en) * | 2005-02-19 | 2006-08-24 | Hirschmann Car Communication Gmbh | Two-band ultraflat antenna for satellite communication |
EP1811599A1 (en) * | 2006-01-19 | 2007-07-25 | Lumberg Connect GmbH | Antenna for telecommunication device |
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