EP3850703A1 - Dispositif de transmission de signaux d'un boîtier au moins partiellement métallique - Google Patents

Dispositif de transmission de signaux d'un boîtier au moins partiellement métallique

Info

Publication number
EP3850703A1
EP3850703A1 EP19753076.9A EP19753076A EP3850703A1 EP 3850703 A1 EP3850703 A1 EP 3850703A1 EP 19753076 A EP19753076 A EP 19753076A EP 3850703 A1 EP3850703 A1 EP 3850703A1
Authority
EP
European Patent Office
Prior art keywords
housing
electromagnetic waves
slot
shaped
housing opening
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.)
Pending
Application number
EP19753076.9A
Other languages
German (de)
English (en)
Inventor
Harald SCHÄUBLE
Thomas Blödt
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.)
Endress and Hauser SE and Co KG
Original Assignee
Endress and Hauser SE and Co KG
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 Endress and Hauser SE and Co KG filed Critical Endress and Hauser SE and Co KG
Publication of EP3850703A1 publication Critical patent/EP3850703A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
    • H01Q1/2233—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in consumption-meter devices, e.g. electricity, gas or water meters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas

Definitions

  • the invention relates to a device for transmitting signals from an at least partially metallic housing with the aid of electromagnetic waves of a certain wavelength, a field device adapter for wireless data transmission and a field device of automation technology.
  • field devices are often used to determine, optimize and / or influence process variables.
  • Sensors such as level measuring devices, flow measuring devices, pressure and temperature measuring devices, conductivity measuring devices, etc.
  • Actuators such as valves or pumps, are used to influence process variables, by means of which the flow of a liquid in a pipe section or the fill level in a container can be changed.
  • field devices are all devices that are used close to the process and that supply or process process-relevant information.
  • field devices are also understood to mean remote I / Os or generally devices which are arranged at the field level. Endress + Hauser produces and sells a large number of such field devices.
  • two-wire field devices are still common in a large number of the existing automation systems, which are connected via a two-wire line to a higher-level unit, for example a control unit PLC.
  • the two-wire field devices are designed in such a way that the measured or control values communicate as the main process variable via the two-wire line or the two-wire cable in the form of a 4-20 mA signal, i.e. be transmitted.
  • the HART protocol in which a frequency signal is superimposed on the analog current signal of 4-20 mA as a digital two-wire signal for data transmission, has proven particularly useful for the transmission of all other data.
  • the data can not only be transmitted via the two-wire line, that is to say purely wire-bound, but that the data can also be transmitted wirelessly with the aid of electromagnetic waves be communicated. Be it to transmit the data wirelessly to a database, for example a cloud database, and make it available there, or to transmit data wirelessly between the field device and a mobile control unit, for example to wirelessly parameterize the field device via the mobile control device or configure.
  • a database for example a cloud database
  • field device adapters can be integrated directly into the two-wire line. I.e. the field device adapter is virtually connected as an independent unit between the higher-level unit and the field device. Alternatively, the field device adapter can also be mechanically connected directly to the field device, for example via a cable screw connection, and electrically connected to field device electronics.
  • the invention is therefore based on the object of proposing a device in which the transmission of signals with the aid of electromagnetic waves is also possible with metallic housings.
  • the object is achieved according to the invention by the device according to claim 1, the field device adapter for wireless data transmission according to claim 12 and the field device of automation technology according to claim 14.
  • the device according to the invention for the transmission of signals from an at least partially metallic housing with the aid of electromagnetic waves of a certain wavelength comprising:
  • a transmitting / receiving unit arranged in the housing for generating and receiving the electromagnetic waves
  • At least one primary antenna arranged in the housing for decoupling the generated electromagnetic waves of the transmitting / receiving unit and for
  • At least one slot-shaped housing opening which is designed such that a length of the slot-shaped housing opening is an integral multiple of a quarter wavelength of the specific wavelength, preferably an integral number Multiples of half a wavelength corresponds to the specific wavelength, so that the slot-shaped housing opening, in cooperation with the primary antenna, transmits the signals into and out of the housing with the aid of the electromagnetic waves.
  • an antenna which comprises a primary antenna or primary radiator and a secondary antenna or secondary radiator, the secondary antenna or the secondary radiator being designed in the form of a slot-shaped housing opening, the length of which corresponds to the following condition:
  • the at least one slot-shaped housing opening is in particular chosen to be small enough that transmission of electromagnetic waves with a very low frequency, i.e. Frequencies significantly lower than 1 GHz, preferably frequencies in the range from 1 kHz to 100 MHz, which can lead to EMC interference, are not allowed through.
  • the slot-shaped housing opening acts as a high-pass filter for electromagnetic waves and only allows waves to pass that are intended for the transmission of signals.
  • Waves with a frequency or frequency band of 2.4 GHz are usually provided for the transmission of signals with the aid of the electromagnetic waves.
  • WLAN according to IEEE 802.1 1 b and g, Bluetooth (IEEE 802.15.1) and ZigBee (IEEE 802.15.4) are among the most prominent representatives of the 2.4 GHz category.
  • Arranged electronics can prevent the length of the slit-shaped
  • the length of the slot-shaped housing opening L in particular also be chosen such that the condition (h + 0.5) ⁇ l / 4 does not apply to a frequency of the strong interference.
  • the housing is an essentially metallic housing.
  • the housing can have, for example, a metallic housing surface section of at least 85%, preferably at least 90%, particularly preferably at least 95%, very particularly preferably at least 99%, based on an overall surface of the housing.
  • the at least one slit-shaped housing opening is at least partially filled with an electrically non-conductive material, the at least one slit-shaped housing opening being at least partially filled with an electrically non-conductive material, the slit-shaped housing opening preferably being designed in this way, that the length of the slit-shaped housing opening corresponds to an integer multiple of the quarter wavelength of the specific wavelength divided by a square root of a dielectric constant of the electrically non-conductive material, preferably an integer multiple of half a wavelength of the specific wavelength divided by the square root of the dielectric constant.
  • a further advantageous embodiment of the device according to the invention provides that the housing, with the exception of the at least one slot-shaped housing opening and possible cable inlets and / or outlets, has an externally self-contained housing shape.
  • a further advantageous embodiment of the device according to the invention provides that the housing has rounded edges, preferably a rounded housing shape, in at least one section in cross section, the at least one slot-shaped
  • Housing opening is arranged in the section.
  • a further advantageous embodiment of the device according to the invention provides that the housing is designed in such a way that at least two circumferences measured in two spatial directions each correspond to an integral multiple of half a wavelength of the specific wavelength, the circumferences measured in each case through the slit-shaped housing opening, preferably a center point the housing opening.
  • a corresponding design of the housing ensures that the HF energy is distributed over the individual “circumferences” of the housing in such a way that a uniform radiation pattern is created overall. In particular, in order to locally delay the orbital period of a wave and thereby the radiation pattern clearly in almost all
  • the design provide that on an external Surface of the housing at least one circulation delay element by one
  • Circulation time of the electromagnetic waves is designed to be delayed and / or the at least one circulation delay element has a groove-shaped or a punctiform structure or is made of a different material than the housing, preferably a dielectric material or a high-frequency metamaterial.
  • a further advantageous embodiment of the device according to the invention provides that the at least partially metallic housing is essentially made of a metallic material.
  • an alternative embodiment of the device according to the invention provides that the at least partially metallic housing is formed from a plastic and the housing, preferably at least partially on an inner surface, has a metallic cladding.
  • a further advantageous embodiment of the device according to the invention further comprises a printed circuit board arranged within the housing, which is designed as
  • Primary antenna for decoupling the generated electromagnetic waves of the transmitter / receiver unit and for coupling and transmitting received ones
  • the configuration can provide that the printed circuit board is further configured as a primary antenna such that the electromagnetic waves are only coupled out or coupled in in a near field and only in combination with the at least one
  • slot-shaped housing opening can be coupled out or coupled into a far field.
  • Such an embodiment offers the advantage that a complete and thus complex antenna, as is known, for example, from the prior art for Vivaldi antennas, is not necessary here. Rather, a primary antenna that only radiates into the near field and that only with the help of the slot-shaped housing opening is sufficient
  • Secondary radiator acts as a complete antenna.
  • the invention further relates to a field device adapter for wireless data transmission comprising a device according to one of the embodiments described above, an adapter housing of the field device adapter comprising the housing.
  • the invention further relates to a field device of automation technology comprising a device according to one of the previously described configurations, wherein a
  • Field device housing of the field device comprises the housing at least in one section.
  • An advantageous embodiment of the field device according to the invention provides that the section comprises at least one cable bushing of the field device.
  • Fig. 1 a schematic representation of a first embodiment of a
  • FIG. 2 shows a schematic representation of a cross section through a housing of a second embodiment of the device according to the invention, which has a plurality of slot-shaped housing openings,
  • Figure 1 shows a schematic representation of a first embodiment of a
  • the device comprises a housing 2, which in the
  • the housing 2 can also be made of a plastic and with a
  • the housing 2 is geometrically designed such that it has a self-contained shape on the outside. It goes without saying that possible cable connections and / or
  • the housing 2 has a housing shape that is essentially cylindrical in cross section. Alternatively, the housing 2 can also have other shapes. The housing 2 can preferably have a housing shape as shown in FIG. 2 with round edges.
  • a printed circuit board 6 is arranged in the housing 2, to or from which the cable 1 a,
  • the circuit board 6 comprises a transmitting / receiving unit 11 for generating and receiving electromagnetic waves.
  • the transmitting / receiving unit 11 can be, for example, an HF modem in the form of a chip.
  • the circuit board further comprises a primary antenna 4 for coupling out the generated electromagnetic waves and for coupling and transmitting the received electromagnetic waves.
  • the transmitting / receiving unit 11 shown in FIG. 1 is set up to transmit electromagnetic waves with a
  • the housing 2 has an (unfilled) slit-shaped opening 5, which has a length L which corresponds to an integral multiple of a quarter wavelength h ⁇ l / 4 of the electromagnetic wave.
  • the opening is in this
  • the slit-shaped housing opening 5 thus has a preferred length of 12.43 cm, which corresponds to approximately half a wavelength (2-L / 4), the electromagnetic waves.
  • the width B of the slot-shaped opening 5 is chosen to be as small as possible and is essentially determined by a corresponding manufacturing process.
  • the width B is preferably less than 3 mm, particularly preferably less than 1 mm.
  • the slot-shaped opening 5 has no electrical connection to the printed circuit board 6 and is illuminated by the primary antenna 4 located within the housing 2.
  • the device shown in Fig. 1 is connected on one end face via the cable 1 a to a field device 7 and on the other end face by the cable 1 b to a higher-level unit (not shown separately), the cable 1 a, 1 b a
  • Represents two-wire line and a line of the two-wire line comprises the signal line 2a, 2b.
  • the other line of the two-wire line is from the printed circuit board 6
  • the measured or manipulated values are transmitted as the main process variable analog in the form of a 4-20 mA signal between the field device and the higher-level unit.
  • All other data in particular data relating to parameterization, diagnosis or the like, is transmitted via the two-wire line using the HART protocol.
  • the data transmitted in a wire-bound manner using the HART protocol can also be transmitted wirelessly with the aid of electromagnetic waves, for example to a cloud.
  • the device thus represents a field device adapter for wireless data transmission.
  • the device can also be mechanically attached directly to an (existing) field device, for example by
  • the attachment is preferably via a
  • the device serves as an adapter (also called a dongle), in particular a Bluetooth adapter by means of which a field device 7, which was originally not set up for wireless data transmission, can be retrofitted or supplemented for this purpose.
  • an adapter also called a dongle
  • a Bluetooth adapter by means of which a field device 7, which was originally not set up for wireless data transmission, can be retrofitted or supplemented for this purpose.
  • the device again in contrast to the example shown in FIG. 1, can also be designed as part of the field device 7.
  • the field device housing has at least one slot-shaped at least in one section
  • the field device housing can be designed in such a way that it has at least one outwardly projecting, in particular cylindrical extension, whose contour can correspond, for example, to the housing 2 shown in FIG. 1 and which has at least one slot-shaped opening 5 designed according to the invention.
  • Fig. 2 shows a cross section through a housing 2 of a second embodiment, in which the housing of the device has a plurality of slot-shaped openings. Two or four slot-shaped openings 5 in the housing 2 have been found to be particularly preferred.
  • the slot-shaped housing openings 5 can additionally have different lengths L1 to L4, the length of each slot-shaped housing opening being independent of the other lengths applies:
  • Fig. 3 shows a schematic representation of a third embodiment of the
  • the housing 2 has a slot-shaped opening 5.
  • the slit-shaped opening 5 is filled with a material other than air, in particular an electrically non-conductive material, for example glass.
  • an electrically non-conductive material for example glass.
  • each opening with an electrical non-conductive material is filled.
  • a dielectric constant DK or (material-dependent) relative permittivity of the electrically non-conductive material used for the filling must be included in the configuration of the length of the (filled) slit-shaped housing opening.
  • DK dielectric constant
  • the housing can be designed geometrically such that at least two outer circumferences of the housing, measured in two large spatial directions, preferably the outer circumferences in each spatial direction of the housing, are an integral multiple of half a wavelength l / 2 corresponds to the electromagnetic wave with which the signals are transmitted.
  • the circumferences are measured or defined in such a way that they each pass through the slit-shaped housing opening.
  • the circumferences preferably run through a center point of the respective slot-shaped housing opening.
  • each circumference U1 and U2 shown in perspective in FIG. 3 they are shown again in one plane in FIGS. 4 a) and b). 4 that each circumference U1 and U2 passes through the slit-shaped housing opening 5. It goes without saying that in the event that the housing 2 has a plurality of slit-shaped openings 5, the circumferences are set such that each circumference extends through each slit-shaped opening 5 of the housing.
  • one or more revolution delay elements 10 can be formed on an outer surface of the housing 2, which are designed such that a corresponding revolution is increased.
  • two delay elements 10 are attached to the housing surface as an example.
  • the delay elements 10 shown in FIG. 3 are designed as groove-shaped elements. However, punctiform elements or elements that are formed from a different material than the housing 2, in particular a dielectric material or a high-frequency metamaterial, are also conceivable. By appropriate positioning, as can be seen from FIG. 4 b), the circumference can be targeted in one or changed several spatial directions, in particular enlarged. It should be noted that, depending on the structure size of the circulation delay elements, an HF circulation path is usually minimally smaller than the (mechanical) extent, since the electromagnetic wave in particular overflows small structures and due to the interaction of the E and H fields, an overall easy one "Abbreviation" results.
  • Fig. 5 shows a schematic representation of a fourth embodiment of the
  • the printed circuit board 6 is designed such that the electromagnetic waves are laterally coupled out or in, so that the printed circuit board serves as a primary antenna.
  • the circuit board is also designed such that the laterally coupled out electromagnetic waves are only emitted into or coupled into a near field 8, so that the laterally radiating circuit board 6 only in combination with the slot-shaped
  • Housing opening 5 acts as a "complete" antenna.
  • the near field 8 in this case comprises at least one area between the circuit board 6 and a housing surface in which the slot-shaped opening 5 is formed.
  • the circuit board can in the housing by appropriate holding elements, for example.
  • Rails are held in a position necessary for the slot-shaped opening of the housing.

Landscapes

  • Details Of Aerials (AREA)
  • Transceivers (AREA)

Abstract

L'invention concerne un dispositif de transmission de signaux à partir d'un boîtier (2) au moins partiellement métallique à l'aide d'ondes électromagnétiques (3) d'une longueur d'onde (λ) déterminée, ledit dispositif comprenant : une unité d'émission/de réception (11) disposée dans le boîtier (3) et destinée à générer et recevoir les ondes électromagnétiques (3), au moins une antenne primaire (4) disposée dans le boîtier (2) et destinée à délivrer en sortie les ondes électromagnétiques générées (3) de l'unité d'émission/de réception (11) et à injecter et transmettre les ondes électromagnétiques reçues (3) au niveau de l'unité d'émission/de réception (11), au moins une ouverture de boîtier (5) en forme de fente qui est conçue de telle sorte que la longueur (L) de l'ouverture de boîtier (5) en forme de fente est un multiple entier d'un quart de longueur d'onde de la longueur d'onde déterminée (ηλ/4), de préférence un multiple entier d'une demi-longueur d'onde de la longueur d'onde déterminée (nλ/2), de sorte que l'ouverture de boîtier (5) en forme de fente transmet en coopération avec l'antenne primaire (4) les signaux à l'aide des ondes électromagnétiques (3) dans le boîtier ou hors de celui-ci.
EP19753076.9A 2018-09-13 2019-08-13 Dispositif de transmission de signaux d'un boîtier au moins partiellement métallique Pending EP3850703A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018122423.0A DE102018122423A1 (de) 2018-09-13 2018-09-13 Vorrichtung zur Übertragung von Signalen aus einem zumindest teilweise metallischen Gehäuse
PCT/EP2019/071656 WO2020052885A1 (fr) 2018-09-13 2019-08-13 Dispositif de transmission de signaux d'un boîtier au moins partiellement métallique

Publications (1)

Publication Number Publication Date
EP3850703A1 true EP3850703A1 (fr) 2021-07-21

Family

ID=67620486

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19753076.9A Pending EP3850703A1 (fr) 2018-09-13 2019-08-13 Dispositif de transmission de signaux d'un boîtier au moins partiellement métallique

Country Status (4)

Country Link
US (1) US20220037760A1 (fr)
EP (1) EP3850703A1 (fr)
DE (1) DE102018122423A1 (fr)
WO (1) WO2020052885A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020108104A1 (de) 2020-03-24 2021-09-30 Endress+Hauser SE+Co. KG Vorrichtung zur Übertragung von Signalen aus einem zumindest teilweise metallischen Gehäuse
AU2022275476A1 (en) * 2022-11-24 2024-06-13 Imdex Technologies Pty Ltd Communications module for survey tool

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001244717A (ja) * 2000-03-02 2001-09-07 Matsushita Electric Ind Co Ltd 無線情報家電装置
US8711044B2 (en) * 2009-11-12 2014-04-29 Nokia Corporation Antenna arrangement and antenna housing
DE102009047535B4 (de) * 2009-12-04 2023-12-07 Endress + Hauser Process Solutions Ag Verfahren zum Ermitteln einer Anschlusskonfiguration eines Feldgerätes an einem Wireless Adapter
JP2012231266A (ja) * 2011-04-25 2012-11-22 Fujitsu Component Ltd アンテナ装置
US9583838B2 (en) * 2014-03-20 2017-02-28 Apple Inc. Electronic device with indirectly fed slot antennas
US9786992B2 (en) * 2014-09-17 2017-10-10 Illinois Tool Works Inc. System and method for cavity-backed antenna
EP3016201B1 (fr) * 2014-10-29 2021-09-08 Gigaset Communications GmbH Dispositif d'antenne

Also Published As

Publication number Publication date
WO2020052885A1 (fr) 2020-03-19
CN112673523A (zh) 2021-04-16
DE102018122423A1 (de) 2020-03-19
US20220037760A1 (en) 2022-02-03

Similar Documents

Publication Publication Date Title
EP3231035B1 (fr) Dispositif pour le transfert de signaux depuis un boîtier métallique
EP1285239B1 (fr) Appareil de mesure de niveau de remplissage
EP3309899A1 (fr) Antenne radar pour une jauge
DE102017109861A1 (de) Verfahren und Vorrichtungen für Geschwindigkeits- und/oder Positionserfassung
EP2623944B1 (fr) Système de mesure du niveau de remplissage fonctionnant selon le principe de radar
EP1325289A1 (fr) Appareil pour mesurer un niveau de remplissage
DE112010001503B4 (de) Antenneneinrichtung
DE102018118765A1 (de) Hochfrequenzbaustein
EP2333691B1 (fr) Cable optique où électrique pour connecter deux dispositifs
WO2020052885A1 (fr) Dispositif de transmission de signaux d'un boîtier au moins partiellement métallique
EP3625848A1 (fr) Appareil de terrain de technique d'automatisation
DE60110017T2 (de) Flache drahtgespeiste Hohlraumschlitzantenne mit einem frequenz-selektiven Speisenetzwerk zur Anpassung auf zwei Resonanzfrequenzen
WO2015161849A1 (fr) Système radar servant à détecter l'environnement d'un véhicule et carte imprimée destinée à un tel système radar
DE102016100441A1 (de) Empfangskoppler für eine kontaktlose Datenübertragungsstrecke
WO2016082958A1 (fr) Dispositif de transmission de signaux sortant d'un orifice d'un boîtier métallique
DE102012224062B4 (de) Streifenleiterantenne, Gruppenantenne und Radarvorrichtung
EP3948819B1 (fr) Dispositif pour la transmission de signaux à partir d'un boîtier au moins partiellement métallique conçu pour l'utilisation dans une zone à risque d'explosions
DE102010043031A1 (de) Funk-Feldgerät
WO2001017061A1 (fr) Antenne multibande
EP3174741B1 (fr) Antenne pour récepteur ou émetteur dans un véhicule automobile, en particulier pour système de surveillance d'état de pneumatique
DE102015214172B4 (de) Vorrichtung zur Objekterfassung
DE102019108358A1 (de) Vorrichtung zur Übertragung von Signalen aus einem zumindest teilweise metallischen Gehäuse
DE102013114223B4 (de) Fernsteuerbare tür- oder torantriebsvorrichtung mit magnetischer antenne
DE10012200A1 (de) Näherungssensor mit drahtloser Datenübertragung
DE102017207235A1 (de) Messgerät mit Mehrfachantenne

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20210225

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20230221