SI23785A - Procedure and circuit for high-frequency communication between questioner and a smart label - Google Patents
Procedure and circuit for high-frequency communication between questioner and a smart label Download PDFInfo
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- SI23785A SI23785A SI201100232A SI201100232A SI23785A SI 23785 A SI23785 A SI 23785A SI 201100232 A SI201100232 A SI 201100232A SI 201100232 A SI201100232 A SI 201100232A SI 23785 A SI23785 A SI 23785A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/0701—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management
- G06K19/0702—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management the arrangement including a battery
- G06K19/0705—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management the arrangement including a battery the battery being connected to a power saving arrangement
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/59—Responders; Transponders
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Abstract
Pri komuniciranju med izpraševalnikom in pametno nalepko, katere vezje je galvansko povezano z napetostnim virom, se v časovnih intervalih, v katerih se po komunikacijskem protokolu pametna nalepka ne odziva na izpraševalnik z oddajanjem visokofrekvenčnih odzivnih signalov, pametna nalepka opazuje prvo amplitudo (Ai), ki je amplituda napetosti, ki jo nosilni signal izpraševalnika inducira na nalepkini anteni. Pametna nalepka nato oddaja signale, s tem da svojo anteno vzbuja z napetostjo, katere amplituda je v bistvu stalna znotraj posameznega odzivanja in se kot druga amplituda (At) glede na dotlej opazovano prvo amplitudo (Ai) nastavi v glavnem tako, da je druga amplituda (At) obratno sorazmerna prvi amplitudi (Ai). Pametna nalepka po izumu nastavi čim nižjo amplitudo svojih odzivnih signalov, s tem da upošteva nazadnje ugotovljeno slabljenje signala na poti med izpraševalnikom in njo, s čimer se odpravi prevelika elektromagnetna emisija ter se varčuje z energijo baterije. When communicating between the interrogator and the smart sticker, the circuit of which is galvanically connected to the voltage source, at the time intervals in which, according to the communication protocol, the smart label does not respond to the interrogator by transmitting high frequency response signals, the smart label observes the first amplitude (Ai) is the amplitude of the voltage induced by the interrogator's carrier signal on the antenna sticker. The smart sticker then emits signals by exerting its antenna with a voltage whose amplitude is substantially constant within a single response, and as the second amplitude (At) with respect to the previously observed first amplitude (Ai) is set mainly in such a way that the second amplitude (At) is inversely proportional to the first amplitude (Ai). The smart label according to the invention sets the lowest possible amplitude of its response signals, taking into account the last detected attenuation of the signal on the path between the interrogator and the sender, thereby removing the excessive electromagnetic emission and saving energy to the battery.
Description
IDS d.o.o., Sojerjeva ulica 63, SI-1000 LjubljanaIDS Ltd., Sojerjeva Street 63, SI-1000 Ljubljana
AUSTRIAMICROSYSTEMS AG, Schloss Premstatten, A-8141 UnterpremstattenAUSTRIAMICROSYSTEMS AG, Schloss Premstatten, A-8141 Unterpremstatten
Postopek in vezje za visokofrekvenčno komuniciranje med izpraševalnikom in pametno nalepkoProcedure and circuit for high frequency communication between the interrogator and the smart label
Izum se nanaša na postopek za visokofrekvenčno komuniciranje med konvencionalnim izpraševalnikom pasivne pametne nalepke in z izumom predlagano pametno nalepko, katere vezje je galvansko povezano z napetostnim virom, pri čemer se predmet izuma nanaša na samodejno naravnavanje amplitude nalepkinega odzivnega signala glede na sproti ugotavljano slabljenje visokofrekvenčnega signala na poti od izpraševalnika do pametne nalepke.The invention relates to a method for high-frequency communication between a conventional passive smart-label tester and a proposed smart label, the circuit of which is galvanically coupled to a voltage source, the subject of the invention relates to the automatic adjustment of the amplitude of the response signal of the label with respect to the detected attenuation of the high-frequency signal en route from the examiner to the smart sticker.
Izum je po mednarodni klasifikaciji patentov uvrščen v razred H 04B 01/59.The invention is classified in class H 04B 01/59 according to the international classification of patents.
Poznane so aktivne pametne nalepke, ki obsegajo različna tipala in beležnik podatkov. Takšne aktivne pametne nalepke morajo delovati tudi v odsotnosti izpraševalnikovega polja. Zato so opremljene z baterijo.Active smart stickers are known, comprising various sensors and a notepad. Such active smart stickers should also work in the absence of the interrogator field. That's why they come with a battery.
Omenjeni izpraševalnik je eden izmed preprostih konvencionalnih izpraševalnikov visokofrekvenčnih pasivnih pametnih nalepk.Said tester is one of the simple conventional high frequency passive smart label testers.
Poznane pa so tudi aktivne pametne nalepke za ultravisoko frekvenco pri 900 MHz. Takšne aktivne pametne nalepke se izpraševalniku lahko še vedno dovolj močno odzovejo le s pasivno moduliranim vzvratnim sipanjem celo pri tako šibkem izpraševalnikovem elektromagnetnem polju na njihovem mestu, da iz tega šibkega elektromagnetnega polja ne morejo izvleči dovolj moči za svoje delovanje. Pametne nalepke za ultravisoko frekvenco se torej opremijo z baterijo zato, da se v razmerah še zadovoljivega omenjenega komuniciranja zagotovi tudi njihovo delovanje, s čimer se dejansko poveča njihov domet.Active smart stickers for ultra-high frequency at 900 MHz are also known. Such active smart stickers can still respond sufficiently strongly to the interrogator only with passively modulated back scattering, even at such a weak electromagnetic field at their location that they cannot extract sufficient power from that weak electromagnetic field for their operation. The ultra-high frequency smart stickers are therefore equipped with a battery to ensure their operation in conditions of satisfactory communication, thereby actually increasing their range.
Na omenjeni način pa se ne more povečati domet pametnih nalepk za visoko frekvenco, na primer pri 13,56 MHz. Namreč oddaljenost od izpraševalnika, pri kateri se takšne pametne nalepke več ne morejo odzvati z moduliranim vzvratnim sipanjem, je približno enaka oni, pri kateri iz šibkega izpraševalnikovega elektromagnetnega polja na njihovem mestu ne morejo več izvleči dovolj moči za svoje delovanje.In this way, however, the reach of high frequency smart stickers, for example at 13.56 MHz, cannot be increased. Namely, the distance from the interrogator, at which such smart labels can no longer respond with modulated back scattering, is approximately equal to that at which they can no longer draw enough power from their weak interrogator electromagnetic field for their operation.
Pametne nalepke za visoko frekvenco pri 13,56 MHz, ki niso opremljene s tipali ali beležnikom podatkov, zato ne potrebujejo lastnega napetostnega vira za napajanje svojega vezja. Takšne pametne nalepke so le pasivne. Kadar morajo komunicirati z zmerno oddaljenim izpraševalnikom, se napajajo iz njegovega visokofrekvenčnega elektromagnetnega polja na mestu, kjer se nahajajo. Z izpraševalnikom pa komunicirajo, s tem da v časovnih intervalih svojega odzivanja pasivno znižajo amplitudo vzvratno sipanih izpraševalnikovih nosilnih valov, kar v teh časovnih intervalih povzroči interferenčni dvig amplitude napetosti na izpraševalnikovi anteni.High frequency smart labels at 13.56 MHz, which are not equipped with sensors or a data logger, therefore do not need their own voltage source to power their circuit. Such smart stickers are just passive. When they have to communicate with a moderately distant interrogator, they are powered by its high-frequency electromagnetic field at their location. However, they communicate with the interrogator by passively reducing the amplitude of the back-scattering transmitter carrier waves at the time intervals of their response, which causes an interference rise in the voltage amplitude at the interrogator antenna at these time intervals.
V pametni nalepki za visoko frekvenco pri 13,56 MHz, ki bi se opremila z baterijo zato, da bi se moč te baterije zadovoljivo uporabila za oddajanje odzivnih signalov s strani te pametne nalepke, bi bilo koristno naravnavati amplitudo odzivnega signala glede na razmere med njo in izpraševalnikom.In a high frequency smart label at 13.56 MHz, which would be equipped with a battery in order to use the power of that battery satisfactorily to emit response signals from this smart label, it would be useful to adjust the amplitude of the response signal according to the conditions between it and the examiners.
Podpora baterije pametni nalepki pri oddajanju signalov pa bi bila zelo potrebna zlasti v mejnih razmerah, ko gre za miniaturno pametno nalepko zelo majhnih linearnih razsežnosti ali pa je oddaljenost pametne nalepke od izpraševalnika večja od običajnega komunikacijskega dometa.However, battery support for a smart label when transmitting signals would be much needed especially in borderline situations when it is a miniature smart label of very small linear dimensions or the distance of the smart label from the interrogator is greater than the normal communication range.
Sklop med anteno izpraševalnika in anteno miniaturne pametne nalepke z razsežnostmi reda velikosti 10 mm x 10 mm je nizek. Zato celo pri praktično uporabnih oddaljenostih od izpraševalnika miniaturna pametna nalepka iz elektromagnetnega polja izpraševalnika izvleče premalo moči za svoje napajanje, pa tudi na njej na moduliran način vzvratno sipani signal z interferenco prešibko vpliva na napetost na izpraševalnikovi anteni, da bi izpraševalnik lahko zaznal omenjeni modulirano vzvratno sipani signal. Izpraševalnikovo polje na mestu miniaturne pametne nalepke pa se še oslabi, ko se le-ta vstavi v drugo pripravo, na primer v mobilni telefon.The assembly between the interrogator antenna and the miniature smart label antenna with dimensions of the order of 10 mm x 10 mm is low. Therefore, even at practically usable distances from the interrogator, the miniature smart sticker draws too little power from the electromagnetic field for its power supply, as well as modulating it in a reciprocally-interleaved signal with little effect on the voltage on the interrogator antenna to allow the interrogator to detect said modulated back poured signal. However, the interrogator field at the location of the miniature smart sticker is further weakened when inserted into another device, such as a mobile phone.
Poznana je mikro SD kartica (US 2010/0044444 Al), ki je opremljena z izpopolnjeno anteno in vezjem za ojačenje na nalepkini anteni sprejetega izpraševalnikovega signala pred dekodiranjem. Njeno vezje je galvansko povezano z napetostnim virom. Ne predlaga pa se, kako naj takšna mikro SD kartica pripravi signal za odzivanje izpraševalniku.A known micro SD card (US 2010/0044444 Al) is provided, which is equipped with an advanced antenna and an amplifier circuit on the label antenna of the received interrogator signal prior to decoding. Its circuit is galvanically connected to a voltage source. However, it is not suggested how such a micro SD card should produce a response signal to the interrogator.
Naloga izuma je, v visokofrekvenčni pametni nalepki, katere vezje je galvansko povezano z napetostnim virom, nastaviti amplitudo v signalu za njeno odzivanje izpraševalniku pasivnih pametnih nalepk, tako da se bo upoštevalo slabljenje visokofrekvenčnega signala na poti med tem izpraševalnikom in to nalepko.It is an object of the invention, in a high-frequency smart label whose circuit is galvanically coupled to a voltage source, to adjust the amplitude in the signal for its response to the passive smart-label interrogator so that the attenuation of the high-frequency signal on the path between that interrogator and that label is taken into account.
Navedena naloga izuma je rešena s postopkom po izumu za visokofrekvenčno komuniciranje med izpraševalnikom in visokofrekvenčno pametno nalepko, pri čemer je postopek opredeljen z značilnostmi iz označujočega dela prvega patentnega zahtevka, podzahtevki 2 do 4 pa opredeljujejo variante izvedbenega primera postopka po izumu, in z vezjem po izumu za izvajanje omenjenega postopka po izumu, pri čemer je vezje opredeljeno z značilnostmi iz označujočega dela petega patentnega zahtevka, podzahtevek 6 pa opredeljuje varianto izvedbenega primera vezja po izumu.Said object of the invention is solved by the method of the invention for high-frequency communication between the interrogator and the high-frequency smart label, the method being defined by the features of the identifying part of the first patent claim, and sub-claims 2 to 4 define variants of an embodiment of the method of the invention, and by a circuit according to the invention of the invention for performing said method according to the invention, wherein the circuit is defined by the features of the designating portion of the fifth claim, and sub-claim 6 defines a variant embodiment of the circuit of the invention.
Visokofrekvenčna pametna nalepka po izumu na ugoden način nastavi čim nižjo primemo amplitudo svojih odzivnih signalov, s tem da upošteva nazadnje ugotovljeno slabljenje visokofrekvenčnega signala na poti med izpraševalnikom in njo, in tako na ugoden način odpravi preveliko elektromagnetno emisijo ter varčuje z energijo baterije.The high-frequency smart label according to the invention conveniently adjusts the amplitude of its response signals as low as possible, taking into account the recently detected attenuation of the high-frequency signal on the path between the interrogator and it, thereby advantageously eliminating excessive electromagnetic emissions and saving battery power.
Izum bo v nadaljnjem podrobno obrazložen na osnovi opisa izvedbenih primerov tako postopka po izumu kot vezja pametne nalepke po izumu za visokofrekvenčno komuniciranje med konvencionalnim izpraševalnikom in to pametno nalepko ter pripadajočega načrta in grafov časovnih potekov, ki prikazujejo na sl. 1 blokovno shemo vezja po izumu v pametni nalepki za visokofrekvenčno komuniciranje z izpraševalnikom, sl. 2 graf časovnih potekov usmerjene in zglajene napetosti na izpraševalnikovi anteni v času dveh odzivov pametne nalepke brez nastavljanja amplitude teh nalepkinih odzivnih signalov za sklopne faktorje 0,100, 0,020 in 0,005 med izpraševalnikovo anteno in nalepkino anteno in sl. 3 graf časovnih potekov kot na sl. 2 vendar s samodejnim nastavljanjem po izumu amplitude nalepkinih odzivnih signalov.The invention will now be further explained on the basis of a description of embodiments of both the process of the invention and the smart label circuit of the invention for high-frequency communication between the conventional examiner and that smart label, and the associated timetable and graphs showing in FIG. 1 is a block diagram of a circuit of the invention in a smart label for high-frequency communication with the interrogator, FIG. 2 is a graph of the time lines of the directed and smoothed voltage at the interrogator antenna during two smart label responses without adjusting the amplitude of these label response signals for the coupling factors 0.100, 0.020 and 0.005 between the interrogator antenna and the label antenna, and FIG. 3 is a graph of the timing of FIGS. 2, however, by automatically adjusting according to the invention the amplitude of the response labels.
• ·• ·
Postopek po izumu se nanaša na visokofrekvenčno komuniciranje med izpraševalnikom in pametno nalepko, katere vezje je galvansko povezano z napetostnim virom, na primer je opremljena z baterijo.The method of the invention relates to high-frequency communication between the tester and the smart label, whose circuit is galvanically coupled to a voltage source, for example equipped with a battery.
Omenjeni izpraševalnik je eden izmed preprostih konvencionalnih izpraševalnikov visokofrekvenčnih pasivnih pametnih nalepk.Said tester is one of the simple conventional high frequency passive smart label testers.
Izpraševalnik oddaja visokofrekvenčne radijske valove stalne amplitude (constant wave mode), ki ne nosijo nobene informacije.The interrogator emits high frequency constant wave mode radio waves that do not carry any information.
Resonančna frekvenca fi visokofrekvenčnega antenskega kroga v izpraševalniku je na primer enaka 13,56 MHz.For example, the resonant frequency φ of the high-frequency antenna circuit in the interrogator is 13.56 MHz.
Po izumu pametna nalepka na svojo anteno A vodi takšen signal (sl. 1), da bodo oddajani visokofrekvenčni signali v času, ko bodo vplivali na izpraševalnikovo anteno, v interferenci z izpraševalnikovim visokofrekvenčnim nosilnim signalom na izpraševalnikovi anteni dosegli želj eni interferenčni učinek na časovni potek napetosti na njej.According to the invention, a smart label on its antenna A conducts such a signal (Fig. 1) that the high frequency signals emitted will interfere with the interrogator's high frequency carrier signal on the interrogator antenna in order to produce a single interference effect over time. tensions on it.
V ta namen mora signal, ki se vodi na nalepkino anteno A, imeti primemo amplitudo.For this purpose, the signal sent to the label antenna A must have a received amplitude.
Pametna nalepka zato najprej kot prvo amplitudo Ai opazuje amplitudo napetosti, ki jo visokofrekvenčni nosilni signal izpraševalnika inducira na nalepkini anteni A. Omenjeno opazovanje poteka v časovnih intervalih, v katerih po komunikacijskem protokolu pametna nalepka ne oddaja visokofrekvenčnih signalov.Therefore, the smart label first observes as the first amplitude Ai the voltage amplitude induced by the high-frequency carrier signal of the interrogator on the label antenna A. The said observation takes place at time intervals during which the smart label does not emit high-frequency signals.
Nato pametna nalepka oddaja visokofrekvenčne signale, s tem da svojo anteno A vzbuja z napetostjo, katere amplituda je znotraj trajanja odzivnega signala v bistvu stalna. Vendar se ta amplituda napetosti na anteni A kot druga amplituda At glede na « · dotlej opazovano prvo amplitudo Ai nastavi tako, da je druga amplituda At, grobo rečeno, obratno sorazmerna prvi amplitudi Ai.The smart label then emits high-frequency signals by exciting its antenna A with a voltage whose amplitude is essentially constant over the duration of the response signal. However, this voltage amplitude at antenna A is set as the second amplitude At with respect to · · the first amplitude Ai observed so far, so that the second amplitude At, roughly speaking, is inversely proportional to the first amplitude Ai.
Kadar je prva amplituda Ai nizka, se izpraševalnikov signal na poti od izpraševalnika do pametne nalepke močno oslabi. Tedaj mora biti druga amplituda At visoka, saj se enaka slabitev signala pričakuje tudi na poti od pametne nalepke do izpraševalnika.When the first amplitude of Ai is low, the interrogator signal is greatly attenuated on the path from the interrogator to the smart label. Then the second amplitude At must be high, since the same signal attenuation is also expected on the path from the smart label to the interrogator.
Natančneje povedano, pa se nalepkina antena A vzbuja z napetostjo, katere druga amplituda At se nastavi na naj večjo vrednost Atmax, kadar je prva amplituda Ai pod referenčno vrednostjo Airef prve amplitude Ai, oziroma se nalepkina antena A vzbuja z napetostjo, katere druga amplituda At se nastavi na vrednost, ki je določena z izrazom Atmax * Airef / Ai, kadar je prva amplituda Ai nad referenčno vrednostjo Airef prve amplitude Ai.Specifically, the antenna label A is excited by a voltage whose second amplitude At is set to the highest value Atmax when the first amplitude Ai is below the reference Airef of the first amplitude Ai, or the label antenna A is excited by a voltage whose second amplitude At is set to the value specified by the term Atmax * Airef / Ai when the first Ai amplitude is above the Airef reference value of the first Ai amplitude.
Omenjena referenčna vrednost Airef prve amplitude Ai se določi kot dva- do petkratnik minimalne vrednosti Aimin prve amplitude Ai, ki jo izpraševalnikovo magnetno polje v nalepkini anteni inducira pri najmanjši vrednosti gostote magnetnega polja na mestu nalepkine antene, ki se zahteva s standardom.The aforementioned Airef reference of the first amplitude Ai is determined to be two to five times the minimum value of Aimin of the first amplitude Ai induced by the interrogator magnetic field in the label antenna at the minimum magnetic field density at the antenna label location required by the standard.
Druga amplituda At se nastavi ravno še dovolj visoko, da se omogoči komunikacija, obenem pa se čim bolj omeji elektromagnetna emisija in se varčuje z energijo.The second amplitude At is set just enough high enough to allow communication, while minimizing electromagnetic emissions and saving energy.
Vezje pasivne pametme nalepke po izumu za visokofrekvenčno komuniciranje s konvencionalnim izpraševalnikom je prikazano na sl. 1.The passive-smart circuit of the invention according to the invention for high-frequency communication with a conventional interrogator is shown in FIG. 1.
Vezje pametne nalepke po izumu je na znan način galvansko povezano z napetostnim virom.The smart label circuit of the invention is galvanically coupled to a voltage source in a known manner.
• ·• ·
Izhodni signal ts’ signalnega generatorja SG se preko izhodnega ojačevalnika OA, ki za oblikovanje omenjenega nalepkinega odzivnega signala nastavi drugo amplitudo At kot amplitudo napetosti signala ts na nalepkini anteni A, vodi na nalepkino anteno.The output signal ts' of the signal generator SG is guided to the label antenna by means of an output amplifier OA, which, to form said label response signal, sets a second amplitude At as the amplitude of the voltage signal ts on the label antenna A.
ss
Za oblikovanje omenjenih odzivnih signalov se signalni generator SG in ojačevalnik OA po izumu krmilita s signalom tos o začetku in koncu oddajanja pametne nalepke.In order to design said response signals, the SG signal generator and the OA amplifier of the invention are controlled by a signal tos about the start and end of the smart label transmission.
Merilnik amplitude AMC kot prvo amplitudo Ai opazuje amplitudo sprejetega signala rs, torej amplitudo napetosti, ki jo izpraševalnikov visokofrekvenčni nosilni signal inducira na nalepkini anteni A.The AMC amplitude meter, as the first amplitude Ai, observes the amplitude of the received signal rs, that is, the voltage amplitude induced by the interrogator's high-frequency carrier signal on the label antenna A.
Merilnik AMC amplitude Ai sprejetega izpraševalnikovega signala s svojim prvim izhodnim signalom avs amplitudne vrednosti krmili omenjeni izhodni ojačevalnik is O A, tako da se druga amplituda At kot amplituda napetosti na nalepkini anteni A za oblikovanje nalepkinega valovnega paketa nastavi glede na vrednost dotlej opazovane prve amplitude Ai. Drugo amplitudo At, grobo rečeno, nastavi obratno sorazmerno prvi amplitudi Ai.The AMC amplifier Ai of the received interrogator signal with its first avs amplitude output signal controls the said output amplifier is O A, so that the second amplitude At as the voltage amplitude on the label antenna A to form the label wave packet is set to the value of the previously observed first amplitude Ai. The second amplitude At, roughly speaking, sets inversely the first amplitude Ai.
Merilnik AMC amplitude je na nalepkino anteno A priključen preko vezja Att/DC za slabitev signala in za vzpostavitev enosmernega napetostnega nivoja. Vezje Att/DC skrbi, da se signal rs oslabi med nalepkinim oddajanjem in da se vzpostavi enosmeren napetostni nivo v vezju, ko nalepka ne oddaja.The AMC amplitude meter is connected to the label antenna A via an Att / DC circuit to attenuate the signal and to establish a DC voltage level. The Att / DC circuit ensures that the rs signal is weakened during the label transmission and that a DC voltage level is established in the circuit when the label is not transmitting.
Vezje Att/DC za slabitev signala in za vzpostavitev enosmernega napetostnega nivoja je krmiljeno z omenjenim signalom tos, ki najavi začetek in prenehanje oddajanja pametne nalepke po izumu.The Att / DC circuit for attenuating the signal and for establishing a DC voltage level is controlled by said signal tos, which announces the beginning and the termination of transmission of the smart label according to the invention.
Na sl. 2 so za dva simulirana nalepkina odzivna signala prikazani časovni poteki usmerjene in zglajene napetosti Uirect na izpraševalnikovi anteni v času odzivanja pametne nalepke za tri različne sklopne faktorje med izpraševalnikovo anteno in nalepkino anteno: k = 0,100, 0,020 in 0,005.In FIG. 2, for two simulated response label labels, the directional and smoothed Uirect voltages at the interrogator antenna are shown during the smart label response time for three different coupling factors between the interrogator antenna and the antenna label: k = 0.100, 0.020, and 0.005.
Ta pametna nalepka ni opremljena s samodejnim nastavljanjem po izumu amplitude nalepkinega odzivnega signala. Pri sklopnem faktorju k = 0,100, nalepka tedaj leži na izpraševalniku, je signal, ki pride na izpraševalnikovo anteno močnejši od pričakovanega. V takem primeru lahko pride do nasičenja v izpraševalnikovem sprejemniku in nezanesljivega delovanja.This smart label is not equipped with the auto-tuning according to the invention of the amplitude of the label response signal. At the coupling factor k = 0.100, the label then lies on the interrogator, the signal coming to the interrogator antenna is stronger than expected. In this case, saturation in the interrogator receiver and unreliable operation may occur.
io Na sl. 3 pa so prikazani časovni poteki kot na sl. 2 vendar za pametno nalepko po izumu s samodejnim nastavljanjem amplitude nalepkinega odzivnega signala. Pri omenjenem zelo dobrem sklopu med izpraševalnikovo anteno in nalepkino anteno (k = 0,100) merilnik AMC amplitude izmeri visoko prvo amplitudo Ai in zato krmili izhodni ojačevalnik O A, tako da je druga amplituda At, torej amplituda napetosti signala ts na anteni A, primemo nižja in izpraševalnik sprejme signal s pričakovano amplitudo.io In Figs. 3 shows timing as in FIG. 2 but for the smart label according to the invention by automatically adjusting the amplitude of the label response signal. At the aforementioned very good coupling between the interrogator antenna and the antenna label (k = 0.100), the AMC amplitude meter measures the high first amplitude Ai and therefore controls the output amplifier OA, so that the second amplitude At, i.e. the amplitude of the signal voltage ts on antenna A, is received lower and the interrogator receives the signal with the expected amplitude.
Claims (6)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SI201100232A SI23785A (en) | 2011-06-28 | 2011-06-28 | Procedure and circuit for high-frequency communication between questioner and a smart label |
| PCT/SI2012/000026 WO2013002737A1 (en) | 2011-06-28 | 2012-04-30 | Method and circuit intended for high-frequency communication between an interrogator and a smart tag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SI201100232A SI23785A (en) | 2011-06-28 | 2011-06-28 | Procedure and circuit for high-frequency communication between questioner and a smart label |
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| SI23785A true SI23785A (en) | 2012-12-31 |
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| SI201100232A SI23785A (en) | 2011-06-28 | 2011-06-28 | Procedure and circuit for high-frequency communication between questioner and a smart label |
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| SI (1) | SI23785A (en) |
| WO (1) | WO2013002737A1 (en) |
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| DE102005061660A1 (en) | 2005-12-22 | 2007-06-28 | Giesecke & Devrient Gmbh | Portable data carrier with active contactless interface |
| KR100875924B1 (en) * | 2007-03-14 | 2008-12-26 | 한국전자통신연구원 | RDF tag power management device and method |
| US8915447B2 (en) | 2007-09-12 | 2014-12-23 | Devicefidelity, Inc. | Amplifying radio frequency signals |
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| WO2013002737A1 (en) | 2013-01-03 |
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