CN1268787A - Aerial suitable for multiple frequency wave band - Google Patents
Aerial suitable for multiple frequency wave band Download PDFInfo
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- CN1268787A CN1268787A CN99102438A CN99102438A CN1268787A CN 1268787 A CN1268787 A CN 1268787A CN 99102438 A CN99102438 A CN 99102438A CN 99102438 A CN99102438 A CN 99102438A CN 1268787 A CN1268787 A CN 1268787A
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- antenna
- whip
- helical coil
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- coupling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/08—Means for collapsing antennas or parts thereof
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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
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
- H01Q1/244—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas extendable from a housing along a given path
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/362—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith for broadside radiating helical antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
- H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
- H01Q11/08—Helical antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
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- 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
- H01Q9/32—Vertical arrangement of element
- H01Q9/36—Vertical arrangement of element with top loading
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Support Of Aerials (AREA)
- Details Of Aerials (AREA)
- Waveguide Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
A novel retractable antenna which enables dual-band operation in two different positions of the antenna is described. Further, the novel retractable antennas are couple to a variety matching circuit arrangements according to various embodiments of the present disclosure to eliminates the use of electrical or mechanical switching of two different matching circuits.
Description
The present invention relates to a kind of antenna, and more particularly relate to a kind of antenna of in more than one frequency band, working of being suitable for.
Along with the increase of the use of radio communication device, it is more and more in short supply that frequency spectrum becomes.Under many circumstances, on a specific frequency band, provide the network operator of service need on another frequency band, provide service to hold its user.For example, the service in a given area can provide in the 900MHz frequency band on the gsm system and provide on the 1800MHz frequency band in the DCS system, perhaps in addition the 3rd system (such as in a pcs system at the 1900MHz frequency band) in provide.Similarly, the service in another zone can be included in an AMPS system in the 800MHz frequency band and a pcs system in the 1900MHz frequency band.Though single network operator can not provide two services in the system in the given area, users of wireless communication devices may be ready to have an opportunity to roam when he can not obtain service in a system.Therefore, radio communication device such as cellular radio, must communicate under two kinds of frequencies.
Further, have be in below or in the device of the telescopic whip antenna of punctured position, the signal of whip presented to remain through lining energy is coupled to antenna and carries out.Therefore, antenna must mate when upper/lower positions again.Traditional mechanical switch or pin diode can be used to change the match circuit between antenna and the transceiver when being in upper and lower position.Yet the match circuit that uses switch to change upper and lower position has several shortcomings.Except making circuit more the complexity, switch also causes extra loss when sending and receive.More importantly, mechanical switch damages and the pin diode switch is damaged by static easily easily.Therefore, need a kind of antenna, it can be in more than one frequency work, and this antenna match circuit that can withdraw and have the novelty that is used for upper and lower position.
Fig. 1 is the block diagram according to the radio communication device such as cellular radio of the present invention;
Fig. 2 is the part stereogram with the antenna of the radio communication device of Fig. 1 coupling;
Fig. 3 is the plane graph according to antenna of the present invention;
Fig. 4 is the cross-sectional view according to the antenna of Fig. 3 of the present invention;
Fig. 5 is the cross-sectional view according to an alternative embodiment of antenna of the present invention;
Fig. 6 is the plane graph according to the antenna element of Fig. 5 of the present invention;
Fig. 7 is the cross-sectional view according to the alternative embodiment of antenna of the present invention;
Fig. 8 is the plane graph according to the antenna element of Fig. 7 of the present invention;
Fig. 9 has shown the frequency response of the antenna of Fig. 5;
Figure 10 is the circuit diagram that shows according to the match circuit of Fig. 1 of the present invention;
Figure 11 is the cross-sectional view according to the alternative embodiment of antenna of the present invention;
Figure 12 is the plane graph according to the antenna element of Figure 11 of the present invention;
Figure 13 is the cross-sectional view according to an alternative embodiment of antenna of the present invention;
Figure 14 is the plane graph according to the antenna element of Figure 13 of the present invention;
Figure 15 is the cross-sectional view according to an alternative embodiment of antenna of the present invention;
Figure 16 is the cross-sectional view according to an alternative embodiment of antenna of the present invention;
Figure 17 is the cross-sectional view according to an alternative embodiment of antenna of the present invention;
Figure 18 is the cross-sectional view according to an alternative embodiment of antenna of the present invention;
Figure 19 is the cross-sectional view according to an alternative embodiment of antenna of the present invention;
Figure 21 is the plane graph that comprises according to the circuit board of the radio communication device of antenna of the present invention;
Figure 22 is the plane graph that comprises according to the circuit board of the radio communication device of antenna of the present invention;
Figure 23 is the plane graph that comprises according to the circuit board of the radio communication device of antenna of the present invention;
Figure 24 is the plane graph that comprises according to the circuit board of the radio communication device of antenna of the present invention;
Figure 25 is the cross-sectional view that comprises according to the circuit board of the radio communication device of antenna of the present invention;
Figure 26 is the plane graph that comprises according to the circuit board of the radio communication device of antenna of the present invention;
Figure 27 is the plane graph that comprises according to the circuit board of the radio communication device of antenna of the present invention;
Figure 28 is the plane graph that comprises according to the circuit board of the radio communication device of antenna of the present invention;
Figure 29 is the plane graph that comprises according to the circuit board of the radio communication device of antenna of the present invention;
Figure 30 is a chart, has shown the frequency response of retractable aerial of the present invention in last position; And
Figure 31 shows the chart of retractable aerial of the present invention in the frequency response of upper/lower positions.
Developing rapidly of radio communication requires to can be used in the Antenna Design of novelty of more than one frequency band.Normally, the double frequency band aerial that need be able under 800MHz AMPS and 1900MHz PCS, work in the U.S., and the antenna that need under 900MHz GSM and 1800MHz DCS, work in Europe.Work under three in these frequency bands, need a kind of three frequency-band antennas.
The disclosure relates to the antenna that is suitable for received signal under multiple frequency band.Particularly, this antenna comprises a fixing whip antenna and the helical coil antenna that is coupled with a single feed point preferably.Single match circuit is utilized for whip antenna and the helical coil antenna provides coupling, and electrostatic protection is provided.According to an embodiment, the size of this antenna also can be connected to a dish end of the whiplike part of antenna, reduces the spacing of helical coil simultaneously, and is reduced.Preferably, a kind of dielectric material is used to around whip part and support to the helical coil antenna is provided.Make antenna can with a link of radio communication device coupling, be used as a monopole, it has fixing whip antenna and helical coil antenna in top-loaded.At last, a geometrical clamp (clip) can be utilized for antenna a feed point is provided, with the whip antenna that further reduces to fix and the electrical length of helical coil antenna.
Antenna according to an alternative embodiment of the present invention is telescopic preferably, and has the straight whip part that spiral conducting line is equipped with at its top.This antenna in upper and lower position all by being presented by the metal lining coupling radio frequency energy.At extended position, bifrequency obtains resonance by the length of whip with a match circuit of the bottom coupling of whip.At retracted position, be an extra match circuit preferably, such as a LC network, link to each other with certain other point, thereby make whip be equivalent to an open-circuit at feed position place along whip.
In last position, need be at the LC network at feed point place to mate.Because the whip of withdrawal partly is about 1/4 wavelength (at the AMPS/GSM frequency band) and 1/2 wavelength (at the DCS/PCS frequency band), a kind of innovative techniques of coupling antenna is that whip is disconnected on electricity in feed point.This is that load impedance-it all will be converted to high impedance status in feed point for two frequency bands by introducing one at a point of the bottom of whip, and realize.Be equivalent at upper/lower positions at the high impedance of feed point and removed whip from antenna.The lc circuit of required load impedance-be preferably serial or parallel connection-should have low impedance value and have high impedance at AMPS/GSM at the DCS/PCS frequency band.Therefore, the antenna at upper/lower positions is equivalent to the self-excitation double frequency band aerial.Various antennas and be positioned at antenna one or more point (such as at the top of whip, the bottom of whip or at the top of whip and the point between the bottom) the various embodiment of different match circuits, will in remaining accompanying drawing, obtain describing in detail.
At first see Fig. 1, wherein shown comprise of the present invention, such as the block diagram of the radio communication device of double frequency-band cellular radio.In most preferred embodiment, such as the frame generator ASIC 101 of the CMOS ASIC that can obtain from Motorola Inc. with combine such as the microprocessor 103 that also is the 68HC11 microprocessor that can obtain from Motorola Inc., to produce the required communication protocol of operation cellular system.Microprocessor 103 has used memory 104, it comprises it being to be solidificated in RAM 105, EEPROM 107 and a ROM 109 in the packaging part 111 preferably, carry out producing the required step of other functions of agreement and executive communication unit, such as to the writing an of display 113, from a keypad 115 reception information, control frequency synthesizer 125 or carry out according to the required step of method amplifying signal of the present invention.ASIC101 handles the sound signal by audio circuit 119 conversions that maybe will deliver to a loud speaker 121 from a microphone 117.
A transceiver is handled radiofrequency signal.Particularly, transmitter 123 and 124 carrier frequencies of utilizing frequency synthesizer 125 to produce send by antenna 129.The information that is received by the antenna 129 of communicator enters receiver 127 and 128 by a matching network and transmission/receiving key 130.A kind of matching network preferably and transmission/receiving key 130 will be described in detail in Figure 10.Receiver 127 and 128 is used to from the carrier frequency of frequency synthesizer 125 symbol that comprises message frame be carried out demodulation.Transmitter and receiver are generically and collectively referred to as transceiver.This communicator comprises message receiver and storage device 131-alternatively, and it comprises digital signal processing device.This message receiver and storage device can be for example digital answering machine or paging receiver.
See Fig. 2 now, it is a partial cross sectional view, shown the radio communication device coupling that shows according to according to the present invention and Fig. 1 for example according to antenna of the present invention.Antenna 129 comprises shell or the overcoat 202 with cover 204.An one pole (monopole) 205 comprises a part (threaded portion) 206 with helical, and this part extends to a coupling unit 208.The length of one pole generally can influence polarization longitudinally, and wherein long one pole provides bigger longitudinal polarization usually.This one pole will obtain more detailed description in conjunction with remaining accompanying drawing.
Antenna and a geometrical clamp 210 are coupled, and have a contact element 212 at the end of elastic arm 214.The base part of geometrical clamp is to link to each other with the circuit board of the circuit with Fig. 1 or other suitable circuit with 216 of base part 216 couplings preferably.Geometrical clamp 210 further comprises one second contact 218 with elastic arm 220 couplings, and elastic arm 220 also extends to base part 216.Coupling unit 208 is kept by elastic arm 214 and 220, and these arms also provide a kind of electrical connection.The size of elastic arm is to obtain suitable selection preferably, so that the efficient of antenna is optimized.That is, the length of elastic arm and width obtain selecting, and think that antenna provides suitable inductance or electric capacity, and wherein narrower arm provides bigger inductance and the arm of broad provides bigger electric capacity.
Fig. 2 has also shown the shell 230 of the radio communication device of Fig. 1.This shell comprises that receives a cover 232 (showing with partial cross sectional view), and it keeps the helical part 206 of the nut 234 of a band helical with reception antenna.Though the feed point of antenna is contact elements 212 and 218 places that are made near the pedestal of coupling unit 205 preferably, this feed point can be made in nut 234 places according to band helical of the present invention.
See Fig. 3 now, it is the plane graph that shows the antenna 129 that separates with radio communication device.The cross-sectional view of Fig. 4 has shown the cross-sectional view of an embodiment of antenna.Particularly, a dielectric core 404 in the overcoat 202 comprises a kind of dielectric material preferably.For example, this core can be to comprise santaprene or polyacrylic dielectric material.For example, this dielectric core can be made up of 75% santaprene and 25% polypropylene, has the dielectric material of dielectric constant 2.0 with generation.Be a dielectric sheaths 405 within dielectric core 402, it has covered is the whip antenna 406 of straight lead basically.For example, dielectric sheaths 405 can be a polytetrafluoroethylmaterial material.Dielectric core 402 has DIELECTRIC CONSTANT preferably
1, dielectric sheaths has DIELECTRIC CONSTANT preferably
2, ε wherein
1＞ε
2Except the bandwidth of broad is provided, dielectric sheaths 405 provides mechanical strength to antenna.As long as ε
1＞ε
2, also can adopt duroplasts.Perhaps, the district of cover can remain empty, thereby the air of DIELECTRIC CONSTANT=1 can provide good electrical characteristics.Consider that according to bandwidth cover also can be removed, as showing among some remaining figure.
In addition, in the helical groove 407 in being formed on dielectric constant 402, a helical coil antenna 408 is arranged.Though this helical coil antenna is formed on the outward flange of dielectric core 402, this helical antenna also can be centered on by dielectric core 402 fully.Whip antenna and helical coil antenna can be electrically connected with one pole 205.Particularly, a lower part of whip antenna 410 is coupled with one pole 205 in the groove on a shoulder part 411 of one pole, and a bottom 412 of helical coil antenna 408 also with one pole in a groove be coupled.Basically center on whip antenna though the helical coil antenna is shown as, the helical coil antenna can be adjacent with whip antenna.
See Fig. 5 now, wherein shown a kind of alternative embodiment of the cross-sectional view of antenna.Particularly, dielectric sheaths 405 has been eliminated, and has stayed the dielectric core 502 around whip antenna 406.
See Fig. 6 now, stereogram has wherein shown according to whip antenna 406 and helical coil antenna 408 of the present invention, as not have overcoat or dielectric layer.In order in DCS frequency band (1710-1880MHz frequency) and PCS frequency band (1850-1990MHz frequency), to send and received signal, that the length l 1 that whip antenna measures from the shoulder of one pole is selected as is about 28.1 (± .5) mm.In order in GSM frequency band (880-960MHz frequency), to send and received signal, that the length l 2 of whip antenna is selected as is about 25.4 (± .8) mm and its pitch are about 7.15mm and are approximately 3.7 circles, and also be that shoulder from one pole measures.
See Fig. 7 and 8 now, they are an alternative embodiment of the present invention and have shown that short whip part 702-it has a dish 704 in the end of antenna to shorten the total lengths of antenna.The pitch of helical coil antenna can be reduced, so that the length of antenna can access shortening.According to the present invention, can adopt other sizes or other frequency bands that are used for above-mentioned frequency band.
See Fig. 9 now, it is a curve chart, shown with the incremental representation of 5dB, as return loss (return loss) according to the function of the antenna frequencies of the present invention of Fig. 5.As seen from Figure, antenna will be operated the signal between 830-960MHz frequency band and the 1710-2000MHz frequency band with the return loss of-dB, and these frequency bands have covered the frequency band of AMPS, GSM, DCS, PCS and PHS.By having revised and the length of helical coil, resonance frequency can be tuned to desirable all frequency bands.
See Figure 10 now, wherein described a kind of matching network and transmission/receiving key 130 in more detail.Particularly, a kind of matching network 1002 comprises an electric capacity 1004 and an inductance 1006.In order to be used as the matching network that is used for GSM, PCS and DCS frequency band, electric capacity 1004 can be about 4.7pf and inductance 1006 is about 8.2nH for example.Another benefit of matching network is that inductance provides the DC path that is used to provide electrostatic protection.At last, according to the present invention, can adopt any traditional transmission/receiving key 1008.
See Figure 11 now, wherein shown cross-sectional view according to a kind of alternative embodiment of antenna 1100 of the present invention.Particularly, a dielectric constant 1102 in the overcoat 1101 comprises a kind of dielectric material preferably.Core and overcoat can comprise with Fig. 4 in the material identical materials described.Be a whip part 1106 in dielectric constant 1102, it is straight basically lead.In addition, a helical coil antenna 1108 and conductive component 1109 couplings.Conductive component 1109 when antenna is in upper/lower positions, makes the spiral part of whip part 1106 and top directly to electrically contact with lining 1110.For example, helical coil and conductive component can be quarter-wave in the GSM frequency band.Lining 1110 is movably with respect to overcoat 1101 and whip part 1106, and comprises a shoulder part 1110, a helical part 1114 and a cover part 1116, and plays a part the feed point at the top of helical coil and whip.Therefore, when antenna is in upper/lower positions, work in the mode identical with the antenna of Fig. 5 in the top of helical coil and whip.
An insulated part 1118 has covered the whip part of the contact 1120 of the far-end from conductive component 1109 to whip.Contact 1120 comprises a groove 1122 that extends preferably around contact, to be received in a contact on the circuit board, antenna is remained on the position, as described in detail in conjunction with the accompanying drawings in the back.The plane graph that has shown the antenna element of the Figure 11 that does not have dielectric material among Figure 12.Show in conjunction with Fig. 6 that as the front size of helical coil and the character of dielectric material can be selected according to the desirable frequency when the upper/lower positions.
See Figure 13 now, wherein shown cross-sectional view according to a kind of alternative embodiment of antenna of the present invention.Basic identical in this structure and 11, just the antenna of Figure 13 does not comprise conductive component 1109, on the contrary, helical coil 1108 directly links to each other with whip part 1106.Therefore, the top of helical coil and whip and lining 1110 capacitive coupling.Helical coil 1108 can be seen clearlyer with directly being connected among Figure 14 of whip part 1106.
See Figure 15 now, wherein shown cross-sectional view according to a kind of alternative embodiment of antenna of the present invention.Particularly, no longer include helical coil, and whip partly comprises an antenna element.As will be in greater detail in conjunction with remaining figure, the antenna upper/lower positions can with lining 1110 capacitive coupling mutually, and can be in last position when groove 1122 contacts with lining and lining 1110 directly be coupled.
See Figure 16 and 17 now, wherein shown cross-sectional view according to a kind of alternative embodiment of antenna of the present invention.Figure 16 and 17 is corresponding with Figure 11 and 13 respectively, but has comprised metal contact, contact 1602 and 1702.As described in detail in conjunction with remaining figure, contact 1602 and 1702 makes when antenna is in upper/lower positions whip part 1106 directly to contact mutually with a match circuit on the circuit board of radio communication device.
See Figure 18 now, wherein shown cross-sectional view according to an alternative embodiment of antenna of the present invention.According to the embodiment of Figure 18, a whip part can move with respect to spiral part.Particularly, a lid 1802 links to each other with the top of whip part 1106, and overcoat 1101, dielectric core 1102 and helical coil 1108 are still fixed with respect to lining 1110.Whip part 1106 is and contact component 1109 directly coupling mutually that this provides the direct contact to lining 1110 with helical coil 1108 preferably.Perhaps, whip part 1106, under the situation that conductive component 1109 is removed, can with lining 1110 capacitive coupling mutually.The embodiment of Figure 19 has further comprised contact 1902, so that can directly contact with match circuit, as will be described in detail in conjunction with remaining accompanying drawing.
Above-mentioned being used at the antenna such as the double frequency-band work of AMPS (842-894MHz) and PCS (1850-1990MHz) or GSM (890-960MHz) and DCS (1710-1880MHz) is to have single feed point preferably.Yet it can be used to any double frequency-band or single band transceivers.Frequency band can be narrow or wide.Identical antenna element can be used to the application beyond the transceiver, and carries out or do not mate change.Any antenna that shows among Figure 11-19 all can be used to have the various circuit board arrangement of the various match circuits settings of describing in conjunction with Figure 20-29.
See Figure 20 now, wherein shown the plane graph that comprises according to the circuit board 2202 of the radio communication device of a kind of antenna of the present invention.This circuit board comprises contact 2004,2006 and 2008.Upper contact head 2004 is as single feed point preferably, and is coupled with a match circuit 2010 that is coupled to telecommunication circuit 2012.When antenna was in upper/lower positions, the major part of whip was withdrawn within the shell.If whip is selected as 3/4 wavelength in the DCS frequency band, then 1/4 wavelength part can on the feed point and the part of 1/2 wavelength can be under this frequency band.For for the design of AMPS and DCS frequency band antenna-wherein whip is approximately 3/4 wavelength of PCS frequency band, 1/4 wavelength of whip partly may extend on the feed point.This part of whip not only loses coupling with antenna, but also in the circuit of radio-frequency energy radiation to the PC plate, causes more phase error and EM to disturb.Therefore, this part of the bottom that match circuit 2010 is used to make whip be in whip is in establishes the road by cable, thereby makes this part of whip be equivalent to disconnect with the antenna that is in upper/lower positions.Because the length of the withdrawal of antenna part is 1/4 wavelength for AMPS/GSM and is 1/2 wavelength for DCS/PCS that we can comprise the LC network by matching network 2014-.This has a short circuit (or Low ESR) to the AMPS/GSM frequency but is open (or high impedance) to the DCS/PCS frequency.One second match circuit 2014 can be coupled with middle contact 2006.Match circuit is well-known in the prior art, and can comprise any LC network, such as the circuit of Figure 10 demonstration.The value of electric capacity and inductance is selected according to several factors, comprises size, shape and the component of desirable frequency, antenna element and shell etc.Second match circuit 2014 is and middle contact 2006 couplings preferably.In contact 2006 be to obtain selecting along the position of whip part 1106 by the design alternative that comprises the Consideration when selecting matching network.At last, the following contact 2008 with the ground coupling is directly coupled to groove 1122.
Figure 21 has shown the antenna of the present invention that is in the position.In last position, whip is by being coupled to energy in the antenna through metal lining, and obtains energy feeding.Two kinds of patterns of antenna operation obtain excitation by the selection of coupling, antenna length and coupling lining.Antenna is adjusted to have first resonance frequency on the AMPS/GSM frequency band and have second resonance frequency on the DCS/PCS frequency band.The length of whip part 1106 can be for example frequency in the DCS frequency band wavelength 3/4.Perhaps, it can be 3/4 wavelength in the PCS frequency band, and 1/3 wavelength in the AMPS frequency band.Because resonance frequency also is subjected to the influence of ground level, shielded cask (shield can) and PCB characteristic, in order to obtain to be lower than the return loss of about 10dB on double frequency-band, match circuit must be finely tuned at different PC plates and shielded cask size and characteristic.At the embodiment of Figure 22, middle contact 2006 can be coupled with ground rather than match circuit.
See Figure 23 now, wherein shown the plane graph that comprises according to an alternative embodiment of the circuit board of the radio communication device of antenna of the present invention.As shown therein, middle contact 2006 and ground coupling, and match circuit 2302 and following contact 2008 couplings.The whip of withdrawal plays a part transmission line.Load impedance in the bottom of whip will be the equation for transmission line of conversion
Z＝Zc(ZL+jZc?tan(l))/(Zc+jZL?tan(1))。Therefore, 1/4 wavelength transmission line of AMPS/GSM will be transformed into the Low ESR of following contact 2008 high impedance at upper contact head 2004 places.But 1/2 wavelength transmission line of DCS/PCS still is transformed into the high impedance at following contact 2008 places the high impedance at upper contact head 2004 places.Match circuit 2302 except the existing coupling to the transceiver at the feed point place that is positioned at lining, provides short circuit and provides open circuit in the high frequency band of frequency by the lower band in frequency, has improved the performance of antenna.
Having a lot of modes to produce has Low ESR and DCS/PCS is had the network of high impedance AMPS/GSM.Two kinds of modes the easiest comprise antiresonant circuit and series resonant circuit.For example, L=1nH and C=7pF parallel circuits will produce 6.5 ohm impedance but the impedance that 1900MHz produced 5k ohm to 840MHz.The series circuit of L=22nH and C=1.5pF will produce 0.03 ohm impedance to 840MHz but 1900MHz be produced 206 ohm impedance.By the coupling of load impedance and whip transmission line, the retracted position of antenna is an even plank of weak point (it is at AMPS/GSM frequency generation resonance) for the PCS/DCS frequency near quarter-wave (it at PCS/DCS resonance takes place) and in the AMPS/GSM frequency.
See Figure 24 now, wherein shown the plane graph that comprises according to the circuit board of a radio communication device of antenna of the present invention.Can not provide perfect short circuit and for DCS/PCS provides open circuit for AMPS/GSM because the whip of withdrawal is not a perfect transmission line and LC network, can be used to improve antenna performance to the coupling on ground, as seen from Figure 24.Coupling point is not a direct contact.Make it possible to carry out capacitive coupling with a cylindricality ring 2402 of match circuit 2014 couplings with antenna.The cross-sectional view that has shown ring among Figure 25.The position of coupling and amount obtain selecting, so that desirable antenna performance to be provided.This coupling to ground has improved the open circuit of antenna/short circuit coupling, thus the performance when improving the antenna withdrawal.The coupling that has shown a kind of replacement among Figure 20 and 21, wherein match circuit links to each other with the middle part of whip, and the bottom ground connection of whip.
See Figure 26 and 27 now, wherein shown the plane graph of circuit board of the radio communication device of the antenna that comprises the Figure 18 that is in upper/lower positions and last position respectively.
See Figure 28 and 29 now, wherein shown the plane graph that comprises according to the circuit of the radio communication device of the metallization pipe of antenna of the present invention and a kind of novelty or sleeve pipe.As shown in figure 28, pipe 2802 has the metalized portion 2804 of having extended length l.This length can be adjusted with as required suitably with antenna match.The metallization pipe has replaced the match circuit with middle contact 2006 couplings preferably.The whip of metallization pipe and antenna has formed a coaxial transmission line.The impedance of this transmission line utilizes transmission line theory to obtain characterizing and the length and the diameter of metalized portion that can be by adjustable pipe obtain changing.Particularly, the impedance operator of Bi He transmission line is
Z wherein
0=characteristic impedance
The D=external diameter
The d=internal diameter
The Er=relative dielectric constant
Do not determined by the equation that provides previously by the impedance of the whip of pipe covering.Suitably select the length of the metalized portion of pipe, just can provide antenna match required correct impedance.Perhaps, can be used in combination a match circuit with pipe 2802.
See Figure 30 and 31 now,, represented respectively when antenna is in lower and upper position with the variation of the return loss of 5dB incremental representation with frequency wherein according to the antenna as Figure 11-19 of the present invention.By revising the length of whip antenna and helical coil, resonance frequency can be tuned to any desirable frequency band.
Though in foregoing description and accompanying drawing, describe and shown the present invention, it should be understood that what this description was just carried out by way of example, and those skilled in the art can carry out numerous changes and correction under the premise without departing from the spirit and scope of the present invention.Though the various embodiment of Figure 20-29 have shown that contact 2004,2006 and 2008 is directly or by the contact that electric capacity is coupled, directly be coupled contact and capacitive coupling contact can freely exchange.Similarly, any antenna of Figure 11-19 can adopt the circuit board arrangement of Figure 20-29, and contact 2004,2006 or 2008 is carried out directly or the capacitive coupling correction.Though the present invention has found concrete application in pocket cellular radio, the present invention also can be applied to any radio communication device, comprises beep-pager, electronic tissue machine (electronic organizer) or computer.The applicant's invention is only limited by appended claims.
Claims (10)
1. be suitable for the fixed antenna of at least two kinds of frequency bands, working, comprise:
One first antenna element, it has the straight basically lead with a feed point coupling; And
One second antenna element, it has the helical coil with first predetermined pitch with described feed point coupling.
2. according to the fixed antenna of claim 1, wherein said second antenna element links to each other with tuning described fixed antenna with an one pole (monopole) with described straight basically lead round described first antenna element and wherein said helical coil basically.
3. according to the fixed antenna of claim 1, further comprise being used to match circuit that described first antenna element and described second antenna element are complementary.
4. one kind is suitable for the retractable aerial setting of working at least two kinds of frequency bands, and described retractable aerial setting comprises:
A helical coil;
A whip part by described helical coil extension; And
A lining, it partly be coupled with described whip movably and with described helical coil and the electric coupling of described whip part.
5. one kind is suitable for the retractable aerial setting of working at least two kinds of frequency bands, and described retractable aerial setting comprises:
A helical coil;
A lining, it and described helical coil electric coupling are also fixed with respect to described helical coil; And
A whip part, it movably with described lining and the electric coupling mutually of described helical coil.
6. be suitable for the retractable aerial setting of the radio communication device of working at least two frequency bands, described retractable aerial setting comprises:
A helical coil;
A whip part, it extends by described helical coil and can move between an extended position and a retracted position;
A lining, it partly be coupled with described whip movably and with described helical coil and the electric coupling mutually of described whip part;
The telecommunication circuit of described radio communication device;
A upper contact head with described lining and the coupling of described telecommunication circuit; And
A match circuit with described upper contact head coupling.
7. according to the retractable aerial setting of claim 6, a following contact-this time contact that further comprises described radio communication device when described whip partly is in described retracted position and described contact touch at the bottom connection of described whip part, and further comprise and a match circuit of described contact down coupling.
8. according to the retractable aerial setting of claim 6, further be included in a middle contact under the described upper contact head, described middle contact and described whip partly are coupled and further comprise a match circuit that is coupled with described middle contact.
9. according to the retractable aerial setting of claim 6, further be included in a middle contact under the described upper contact head, described in contact be coupled with a pipe that is used to receive described whip part.
10. according to the retractable aerial setting of claim 9, wherein with described in the part of described pipe of contact coupling must be metallized.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/032,162 US6127979A (en) | 1998-02-27 | 1998-02-27 | Antenna adapted to operate in a plurality of frequency bands |
| US032,162 | 1998-02-27 | ||
| US219,561 | 1998-12-24 | ||
| US09/219,561 US6611691B1 (en) | 1998-12-24 | 1998-12-24 | Antenna adapted to operate in a plurality of frequency bands |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1268787A true CN1268787A (en) | 2000-10-04 |
Family
ID=26708061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99102438A Pending CN1268787A (en) | 1998-02-27 | 1999-02-26 | Aerial suitable for multiple frequency wave band |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPH11298240A (en) |
| KR (1) | KR100326224B1 (en) |
| CN (1) | CN1268787A (en) |
| BR (1) | BR9917171A (en) |
| GB (1) | GB2335312B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1871742B (en) * | 2003-10-22 | 2012-02-15 | 索尼爱立信移动通讯股份有限公司 | Multi-band antennas and radio apparatus incorporating the same |
| CN106935961A (en) * | 2015-12-29 | 2017-07-07 | 海能达通信股份有限公司 | A kind of helical antenna, antenna and communication equipment |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2376132A (en) * | 2001-06-01 | 2002-12-04 | David Ganeshmoorthy | Helical antenna inside insulating cylinder |
| JP3839001B2 (en) * | 2003-07-28 | 2006-11-01 | 埼玉日本電気株式会社 | Portable radio |
| KR100813136B1 (en) | 2004-10-29 | 2008-03-17 | (주)에이스안테나 | Multi/broad-band antenna of mobile communication terminal |
| KR101099969B1 (en) | 2005-03-31 | 2011-12-28 | 삼성전자주식회사 | Antenna with integrated dmb antenna for mobile communication terminal |
| US7342545B2 (en) * | 2006-02-28 | 2008-03-11 | Sony Ericsson Mobile Communications Ab | Antenna system configuration for mobile phones |
| KR101893442B1 (en) * | 2012-05-29 | 2018-10-04 | 삼성전자주식회사 | Antenna for communication electronic device |
| JP6136631B2 (en) * | 2013-06-25 | 2017-05-31 | 富士通株式会社 | ANTENNA DEVICE AND ELECTRONIC DEVICE |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4229743A (en) * | 1978-09-22 | 1980-10-21 | Shakespeare Company | Multiple band, multiple resonant frequency antenna |
| GB2206243A (en) * | 1987-06-24 | 1988-12-29 | Panorama Antennas Ltd | Dual-frequency helical antenna |
| US5144324A (en) * | 1989-08-02 | 1992-09-01 | At&T Bell Laboratories | Antenna arrangement for a portable transceiver |
| JP2703670B2 (en) * | 1991-04-12 | 1998-01-26 | 三菱電機株式会社 | Antenna device |
| EP0522806B1 (en) * | 1991-07-08 | 1996-11-20 | Nippon Telegraph And Telephone Corporation | Retractable antenna system |
| US5412393A (en) * | 1993-01-25 | 1995-05-02 | Motorola, Inc. | Retractable antenna assembly with bottom connector |
| KR960030478A (en) * | 1995-01-27 | 1996-08-17 | 김광호 | Antenna of wireless device |
| WO1996024965A1 (en) * | 1995-02-07 | 1996-08-15 | Sony Corporation | Antenna for two frequency bands |
| FI97499C (en) * | 1995-04-07 | 1996-12-27 | Nokia Mobile Phones Ltd | Double acting antenna |
| FI99219C (en) * | 1995-06-06 | 1997-10-27 | Nokia Mobile Phones Ltd | Antenna that works in two frequency bands |
| JP2795825B2 (en) * | 1995-06-30 | 1998-09-10 | エスエムケイ株式会社 | Antenna device |
| US5812093A (en) * | 1995-09-29 | 1998-09-22 | Motorola, Inc. | Antenna assembly for a wireless-communication device |
| US5635943A (en) * | 1995-10-16 | 1997-06-03 | Matsushita Communication Industrial Corp. Of America | Transceiver having retractable antenna assembly |
| US5686927A (en) * | 1995-11-03 | 1997-11-11 | Centurion International, Inc. | Retractable antenna |
| SE9600538D0 (en) * | 1996-02-13 | 1996-02-13 | Allgon Ab | Dual band antenna means incorporating helical and elongated radiating structures |
| US5812097A (en) * | 1996-04-30 | 1998-09-22 | Qualcomm Incorporated | Dual band antenna |
| US5717409A (en) * | 1996-08-02 | 1998-02-10 | Lucent Technologies Inc. | Dual frequency band antenna system |
| FI102434B1 (en) * | 1996-08-22 | 1998-11-30 | Lk Products Oy | Dual frequency antenna |
| US5900839A (en) * | 1996-09-25 | 1999-05-04 | U.S. Philips Corporation | Radio transmission apparatus comprising a retractable antenna and an antenna device for such apparatus |
| KR19980023441A (en) * | 1996-09-30 | 1998-07-06 | 정장호 | Dual helical antenna of dual band radiotelephone |
| SE513368C2 (en) * | 1997-11-14 | 2000-09-04 | Moteco Ab | Antenna device for dual frequency bands |
-
1999
- 1999-02-26 KR KR1019990006581A patent/KR100326224B1/en not_active IP Right Cessation
- 1999-02-26 BR BR9917171-6A patent/BR9917171A/en not_active Application Discontinuation
- 1999-02-26 CN CN99102438A patent/CN1268787A/en active Pending
- 1999-03-01 JP JP11052121A patent/JPH11298240A/en active Pending
- 1999-03-01 GB GB9904450A patent/GB2335312B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1871742B (en) * | 2003-10-22 | 2012-02-15 | 索尼爱立信移动通讯股份有限公司 | Multi-band antennas and radio apparatus incorporating the same |
| CN106935961A (en) * | 2015-12-29 | 2017-07-07 | 海能达通信股份有限公司 | A kind of helical antenna, antenna and communication equipment |
| CN106935961B (en) * | 2015-12-29 | 2023-10-20 | 海能达通信股份有限公司 | Spiral antenna, antenna and communication equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100326224B1 (en) | 2002-02-27 |
| GB2335312B (en) | 2002-10-09 |
| BR9917171A (en) | 2001-12-04 |
| JPH11298240A (en) | 1999-10-29 |
| GB2335312A (en) | 1999-09-15 |
| GB9904450D0 (en) | 1999-04-21 |
| KR19990072994A (en) | 1999-09-27 |
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Legal Events
| Date | Code | Title | Description |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |