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EP0484454A1 - Dispositif d'emission et de reception pour appareils portatifs. - Google Patents

Dispositif d'emission et de reception pour appareils portatifs.

Info

Publication number
EP0484454A1
EP0484454A1 EP90913383A EP90913383A EP0484454A1 EP 0484454 A1 EP0484454 A1 EP 0484454A1 EP 90913383 A EP90913383 A EP 90913383A EP 90913383 A EP90913383 A EP 90913383A EP 0484454 A1 EP0484454 A1 EP 0484454A1
Authority
EP
European Patent Office
Prior art keywords
antenna
sheet metal
angles
arrangement according
resonators
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.)
Granted
Application number
EP90913383A
Other languages
German (de)
English (en)
Other versions
EP0484454B1 (fr
Inventor
Josef Rasinger
Arpad Ludwig Scholtz
Ernst Bonek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG Oesterreich
Siemens AG
Original Assignee
Siemens AG Oesterreich
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG Oesterreich, Siemens AG filed Critical Siemens AG Oesterreich
Publication of EP0484454A1 publication Critical patent/EP0484454A1/fr
Application granted granted Critical
Publication of EP0484454B1 publication Critical patent/EP0484454B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/005—Patch antenna using one or more coplanar parasitic elements

Definitions

  • the invention relates to a transmitting and / or receiving arrangement for portable devices, consisting of a shielding housing and an antenna conductively connected to it, which consists of two or more angled antenna resonators which are essentially oriented in the same way.
  • EP-A 177 362 describes a broadband antenna for portable radio devices. It consists of two angled resonators with different resonance frequencies. Both resonators are fed from a common line via a branch in the manner of an "inverted-F antenna". The antenna resonators work independently of one another and do not form a unit. The efficiency is therefore not particularly high. The distance between the parallel legs is constant
  • Inverted-F antennas are from T. Taga and K. Tsu ⁇ ekawa, "Performance Analysis of a Built-In Planar Inverted F Antenna for 800 MHz Band Portable Radio Units," IEEE Trans., Selected Areas in Commun. , vol. SAC-5, no.5, pp. 921-929, June (1987). Such antennas are adapted by varying the position of the feed point.
  • the invention has for its object to improve the transmission or reception performance of the antenna, with large Band widths should be easy to manufacture and adaptability.
  • a transmission and / or reception arrangement for portable devices consisting of a shielding housing and an antenna connected to it in an conductive manner, which is connected via at least one feed line to a transmission output or receiver input
  • the shielding ⁇ housing made of metal and the antenna consists of two or more essentially identically oriented angled antenna resonators, only one antenna resonator being connected to the feed line and the feed point between the kink edge of the apex area and the free resonator end, with a coaxial feedthrough for the feed line is present and the feed line is connected to the transmitter output and receiver input via a duplex filter, and the distance between the antenna resonators in the end region is considerably smaller than at the kink edge of the apex region in order to vary the input impedance of the antenna.
  • the non-powered resonators of the antenna are excited in a radiation-coupled manner by the powered resonator, whereby the bandwidth of the antenna is increased. Due to the angled shape and the widening of the ends, currents flow in all three spatial directions. High cross currents are formed, which result in a low impedance. This fills gaps in the directional characteristics of the antenna. Due to the small space requirement, the arrangement is eminently suitable for mobile radio applications. It is easy to manufacture and the entire high-frequency, low-frequency and digital electronics of a portable radio can be accommodated in the shielding housing.
  • the metal housing also serves as an earth replica for the antenna.
  • the range of variation is special by changing the attachment point of the feed line to the antenna resonator and by virtue of the fact that the resonators are widened in the region of their ends in order to vary the input impedance of the antenna large. Therefore, in many applications, matching networks between the antenna and the transmission output stage or transmission filter, and between the antenna and the receiver input or reception filter can be saved.
  • the arrangement of the antenna resonators which are essentially parallel to one another can also be described as a slot antenna, the input impedance being variable within wide limits due to the width and shape of the slot between the resonators.
  • the transmitting and / or receiving arrangement for portable devices consists of a shielding housing and an antenna connected to it in a conductive manner, which is connected via at least one feed line to a transmitter output or receiver input , the shielding housing made of metal and the antenna consisting of two or more essentially identically oriented angled antenna resonators and at least two antenna resonators connected to a feed line and the feed points between the kink edge of the apex regions and the free resonator ends, with a coaxial through-hole
  • There is a guide for each feed line and the feed lines are each connected to the transmitter output and receiver input via a transmission and reception filter, and the distance between the antenna resonators in the end region is considerably smaller in order to vary the input impedance of the antenna than at the crease edge of the apex areas.
  • a partial decoupling of transmitter output and receiver input is achieved by feeding two antenna resonators and connecting the feed lines to the transmission and reception filters.
  • separate optimization of transmitter and receiver adaptation is possible.
  • the antenna can be located above any side surface of the shielding housing. In trials it did however, it has proven to be advantageous that the antenna resonators are arranged on the top or top surface of the shielding housing.
  • the antenna consists of at least two powered, opposing partial antennas. Both sub-antennas can be of the same length, creating double resonance.
  • the antenna consists of lambda / 4 resonators. The bandwidth can therefore be increased even further if the length of the antenna resonators is unequal.
  • the angled antenna resonators are formed from sheet metal angles.
  • three sheet metal angles are present and the middle sheet metal angle is connected to the feed line.
  • the shielding housing and the sheet metal angles are punched out of a flat sheet metal and bent into the corresponding shape.
  • the sheet metal angles it is also possible for the sheet metal angles to be soldered to the shielding housing or to be conductively connected to it.
  • the mechanical strength of the antenna is increased by the fact that the sheet metal angles have a U-shaped longitudinal section and the non-fed or non-radiation-coupled leg is conductively attached to a board protruding from the shielding housing and is connected to the shielding housing via a ground plane.
  • a particular stiffness is achieved in that the circuit board protrudes between the free resonator ends of the sheet metal angles and the resonator ends are connected to the circuit board.
  • a special mechanical resistance is given by the fact that the shielding housing is surrounded by a plastic housing, onto which the sheet metal angles as a metal foil on the outside or applied on the inside and connected to the shield housing via a ground leadthrough.
  • the angled antenna resonators are formed from wire angles. These wire angles converge in such a way that their free resonator ends are only a short distance apart. Here, too, high currents flow and there is a small impedance.
  • the "inverted-F-structure” has the advantage over the "inverted-L-structure” of a higher quality of adaptation to the broadband. The improvement is about 50-100%.
  • FIG. 5 shows an example with three antenna resonators
  • FIG. 6 shows an example of integration on a circuit board
  • Fig. 7 shows an example with resonators made of metal foil
  • antennas with two or more angled resonators are described, which can be installed in portable radio devices, such as cordless telephones, mobile telephones, pagers, "telepoint devices” etc.
  • portable radio devices such as cordless telephones, mobile telephones, pagers, "telepoint devices” etc.
  • As an internal antenna for a digital cordless telephone it is set to the 1.7 GHz band.
  • the common functional features are generally only given in the first exemplary embodiment.
  • the structure of a first antenna is shown in Fig. 1.
  • the two sheet metal angles 2, 3 acting as antennas are attached to a shielding housing 1 on the upper side.
  • the shield housing 1 contains the entire high-frequency, low-frequency and digital electronics of the handset of a cordless telephone.
  • the shielding housing 1 also fulfills the function of an earth simulation for the antenna and influences the bandwidth. The larger it is, the smaller the bandwidth becomes.
  • the top of the shield housing 1 has been found to be a convenient place for attaching the antenna.
  • the shielding housing 1 (or parts thereof) and the sheet metal angles 2, 3 are punched out of a flat sheet metal and bent as shown in FIG. 1.
  • a feed line 4 is connected to the first sheet metal bracket 2 and leads out of the interior of the shielding housing 1 via a coaxial feedthrough 5.
  • the first sheet metal angle 2 is thus the fed element of the antenna, the second sheet metal angle 3 is radiation-coupled to the first sheet metal angle 2.
  • the feed line 4 is connected to a receiver input or transmitter output in the interior of the shielding housing 1 via a duplex filter.
  • the 2 shows the attachment point of the feed line 4 to the first sheet metal angle 2.
  • the location of this attachment point and the shape of the mutually facing edges of the sheet metal angles 2, 3 allow the input impedance of the antenna to be varied over a wide range.
  • the sheet metal angles 2,3 are widened towards the ends. This saves an adaptation network between the antenna and the transmitter output or receiver input.
  • the two sheet metal angles 2, 3 ' have a different length. The resulting different resonance frequencies of the individual radiators result in a considerable increase in the bandwidth compared to a comparable antenna consisting of only a single sheet metal angle.
  • FIG. 3 An alternative possibility of connecting the transmitter and receiver to the antenna according to the invention is shown in FIG. 3.
  • the first sheet metal angle 2 is connected to the first feed line 4, the second sheet metal angle 3 is connected to a second feed line 6.
  • the feed lines 4, 6 are led out through bushings 5.
  • the transmitter output is via a transmission filter connected to the first sheet metal bracket 2.
  • the receiver input is connected to the second sheet metal bracket 3 via a reception filter.
  • This type of design results in part of the required decoupling of transmitter output and receiver input.
  • the variation of the input impedance by shaping the sheet metal angles 2, 3 and varying the fastening point of the feed lines 4, 6 takes place as in the first exemplary embodiment.
  • the shield housing 1 is preceded by two partial antennas on the narrow side.
  • the first partial antenna consists of the first two sheet metal angles 2, 3.
  • the second sub-antenna is constructed identically and consists of sheet metal 7.8.
  • the feed for the first partial antenna takes place via the feed line 4 through a coaxial feedthrough 5; the same applies accordingly for the second partial antenna.
  • the length of the resonators is lambda / 4. Both Crystala ⁇ tenne ⁇ are the same length and there is a double resonance.
  • a third sheet metal angle 9 is arranged between the two sheet metal angles 2, 3 from the shielding housing 1.
  • the free resonator end of the third sheet metal angle -9 is widened symmetrically towards the first two sheet metal angles 2, 3.
  • the feed line 4 is connected to the third sheet metal angle 9 via the coaxial feedthrough 5.
  • the first two sheet metal angles 2, 3 are radiation-coupled.
  • the shield housing 1 consists of two parts and encloses a circuit board 12 on which the components of the device are arranged.
  • the circuit board 12 protrudes on the upper narrow side between the parts of the shielding housing 1 and is provided with a surface 14.
  • the antenna consists of sheet metal angles 10, 11 which have a U-shaped longitudinal section. They are through a solder joint 13 over the entire length of the respective lower leg of the sheet metal angle 10,11 connected to the ground surface 14 and attached to the circuit board 12.
  • the feed takes place via a conductor track through the bushing 5 in the shielding housing 1 and a recess in the lower leg of the sheet metal bracket 10 to the feed point 15.
  • the sheet metal bracket 10 is also connected to the circuit board 12 here. If necessary, the free resonator end can also be connected to the circuit board 12. Both a separate and a common supply of the sheet metal angles 10, 11 are possible.
  • the shielding housing 1 is surrounded by a plastic housing 16.
  • the sheet metal angles 2, 3 are sprayed onto the outside of the plastic housing 16. It would also be possible to etch them out.
  • the sheet metal bracket 2 is connected to the transmitter / receiver from a feed point 17. The contact between the sheet metal angles 2, 3 and the shielding housing 1 is established via a ground leadthrough 18.
  • the antenna of the transmitting and receiving arrangement according to FIG. 8 is made from wire angles 19, 20. They run towards each other and are only a short distance from each other at the free resonator end.
  • the wire angles 19, 20 are soldered to the shield housing 1, and the second wire angle 20 is connected to the transmitter / receiver via a feed line 4.
  • the shield housing 1 has a coaxial feedthrough 5.
  • These wire angles 19, 20 are of elongated design and therefore have a simple shape.
  • the shield housing 1 has no step.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)
  • Waveguide Aerials (AREA)
  • Transceivers (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

Une antenne destinée à l'émetteur et au récepteur d'un appareil radio portatif (téléphone sans fil, téléphone mobile, récepteur de poche, appareil à télépoints, etc.) comporte principalement deux équerres en tôle (2, 3) disposées côte à côte. L'un des deux éléments est excité avec des courants haute fréquence au moyen d'un conducteur coaxial (4). La deuxième équerre en tôle (3) est excitée par la première équerre (2) par couplage à rayonnement. Les équerres en tôle (2, 3) sont alignées dans le même sens et la distance qui les sépare est notablement inférieure dans la région terminale à celle au niveau du bord plié de la ligne des sommets. Cela engendre des courants transversaux élevés et une faible impédance. L'antenne peut également être modifiée par alimentation des deux équerres en tôle (2,3), répartition sur deux antennes partielles identiques ou plusieurs équerres en tôle. Les équerres peuvent être constituées de feuilles métalliques placées sur un boîtier en plastique. Un mode de réalisation avec des équerres en fil métallique est également possible.
EP90913383A 1989-07-27 1990-07-26 Dispositif d'emission et de reception pour appareils portatifs Expired - Lifetime EP0484454B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT1815/89A AT393054B (de) 1989-07-27 1989-07-27 Sende- und/oder empfangsanordnung fuer tragbare geraete
AT1815/89 1989-07-27
PCT/EP1990/001227 WO1991002386A1 (fr) 1989-07-27 1990-07-26 Dispositif d'emission et de reception pour appareils portatifs

Publications (2)

Publication Number Publication Date
EP0484454A1 true EP0484454A1 (fr) 1992-05-13
EP0484454B1 EP0484454B1 (fr) 1994-09-28

Family

ID=3521588

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90913383A Expired - Lifetime EP0484454B1 (fr) 1989-07-27 1990-07-26 Dispositif d'emission et de reception pour appareils portatifs

Country Status (6)

Country Link
US (1) US5365246A (fr)
EP (1) EP0484454B1 (fr)
JP (1) JPH05500889A (fr)
AT (2) AT393054B (fr)
DE (1) DE59007355D1 (fr)
WO (1) WO1991002386A1 (fr)

Cited By (2)

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US6957085B2 (en) 2001-04-11 2005-10-18 Lg Electronics Inc Internal display-mounted antenna for mobile electronic equipment and mobile electronic equipment incorporating same
US7072690B2 (en) 2001-04-11 2006-07-04 Lg Electronics Inc. Multi-band antenna and notebook computer with built-in multi-band antenna

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CN100438213C (zh) * 2003-08-13 2008-11-26 宏达国际电子股份有限公司 垂直式倒f型天线
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Also Published As

Publication number Publication date
ATE112421T1 (de) 1994-10-15
WO1991002386A1 (fr) 1991-02-21
DE59007355D1 (de) 1994-11-03
US5365246A (en) 1994-11-15
ATA181589A (de) 1990-12-15
JPH05500889A (ja) 1993-02-18
AT393054B (de) 1991-08-12
EP0484454B1 (fr) 1994-09-28

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