JPH0265529A - Card type transmitter-receiver - Google Patents

Abstract

PURPOSE:To attain the transmission/reception on both sides, to form a card equal to an ID card to be identified contactlessly while being left incorporated in a pocket or a band bag and to avoid a troublesome operation by constitution the transmitter-receiver through the arrangement of a transmission/reception antenna composed of a microstrip antenna respectively on both sides of the card. CONSTITUTION:A ground plate 23 composed of a dielectric metallic plate made of a copper plate is pinched and laminated between two dielectric bases 20a, 20b with a low dielectric constant, and microstrip resonators 21a, 21b and 22a, 22b are arranged respectively on both sides of the laminated body. Thus, antennas 7a, 12a composed of the microstrip resonators 21a, 21b, the dielectric base 20a and the ground plate 23 are formed on the surface of the laminated body with a directivity and antennas 7b, 12b comprising the microstrip resonators 21b, 22b, the dielectric base 20b and the ground plate 23 are formed on the rear of the laminated body with directivity. Then a circuit section 24' other than the antennas 7a, 7b, 12a, 12b of a reply equipment 4' is mounted properly to nearly the center of the laminated body.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a card-shaped transceiver that can transmit and receive data on both the front and back sides of a card-shaped device.

(Prior art) In recent years, appropriate personal information has been written in a card type transceiver as a response device carried by a person, and an interrogation signal is transmitted by microwave from the interrogation device to the response device, and this interrogation signal is received. A system has been proposed in which a response device transmits a predetermined response signal by microwave to an interrogation device, and the interrogation device verifies the received response signal by an appropriate means to identify a person. Depending on the information content written to this card-type transceiver, it can function as an ID card, driver's license, commuter pass, etc. that can be identified without contact while being carried in a person's pocket or the like.

Here, if the response device is to function as an ID card or driver's license, it cannot receive voltage from a commercial AC power source because it is carried by a person, and if it is powered by a battery, etc.
The response device is not fully satisfactory in terms of size, weight reduction, and lifespan.

Therefore, a technology for a card-type transceiver that does not require a power source as a response device is disclosed in Japanese Patent Application Laid-Open No. 58-85183. An example of this conventional card type transceiver will be explained with reference to FIGS. 4 to 6. FIG. 4 is an external perspective view of an example of a conventional card-type transceiver, and FIG.
6 is a cross-sectional view taken along the line AA in FIG. 4, and FIG. 6 is a block circuit diagram of a system using the card-type transceiver of FIG. 4 as a response device.

First, an overview of the system will be explained with reference to FIG. In FIG. 6, a transmitter 2 is used for transmitting an interrogation signal using a frequency f in the microwave band as a carrier wave to an interrogation device 1 installed in order to, for example, identify a person and control the opening/closing of a door.
and an antenna 3, and a receiver 5 and an antenna 6 for receiving a response signal having the second harmonic 2f of the frequency f as a carrier wave from the response device 4.

Further, the response device 4 is provided with an antenna 7 having a function of receiving the interrogation signal transmitted from the interrogation device 1, and the carrier wave of the interrogation signal received by the antenna 7 is transmitted to the second harmonic 2f through a diode or the like. A multiplier circuit 8 that outputs and a power rectifier circuit 9 that rectifies the carrier wave and uses it as a power source.
is provided.

Further, a response signal output circuit 10 that operates based on the voltage output from the power supply rectifier circuit 9 and outputs a response signal, a modulation circuit 11 that modulates the second harmonic 2f by A1 using this response signal, and an interrogation device 1 Antenna 1 transmitting towards
2 is provided. Note that the transmitting function is enhanced by the multiplier circuit 8, modulation circuit 11, and antenna 12. In the above description, in order to simplify the explanation, the antenna 7
receives the interrogation signal carrier wave as a power supply carrier wave,
Although the response signal is output when the voltage is output from the power supply rectifier circuit 9, the present invention is not limited to this. An appropriate calculation output may be output as a response signal.

By the way, the above-mentioned response device 4 is constructed in a thin card shape as shown in FIGS. 4 and 5 so as to be convenient for people to carry. 4 and 5, the antenna 7.12 of FIG. 6 is constituted by a microstrip antenna. Such a card-type transmitter/receiver has microstrip resonators 21 and 22 formed on one side of a dielectric substrate 20 with a low dielectric constant by vapor deposition, etching, etc., and a ground plate 23 such as a copper plate arranged on the other side. , the circuit section 24 other than the antenna 7.12 of the response device 4 is appropriately incorporated in the center of the dielectric substrate 20. A receiving antenna 7 is formed by the microstrip resonator 2I, the dielectric substrate 20, and the ground plate 23, and a transmitting antenna 12 is formed by the microstrip resonator 22, the dielectric substrate 20, and the ground plate 23. Ru.

(Problem to be solved by the invention) Regarding the above-mentioned microstrip antenna, the fifth
As shown in the figure, a microstrip Ffl device 21.
It has directivity that allows transmission and reception only on the surface where 22 is placed. Therefore, in the conventional card-type transceiver, transmission and reception cannot be performed unless the surface on which the microstrip resonators 21 and 22 are provided faces the interrogation device 1.

With this, the card-type transmitter/receiver must be stored in a baguette, handbag, etc. with one side facing outward.
It is complicated to use. In particular, when the card-type transceiver is stored in a handbag or the like, it is extremely troublesome for the user to manage which direction a certain side of the card-type transceiver faces.

SUMMARY OF THE INVENTION An object of the present invention is to provide a card-type transmitter-receiver capable of transmitting and receiving data on five sides, which was developed in view of the circumstances of the conventional card-type transmitter-receiver described above.

(Means for Solving Interlayer Points) In order to achieve the above object, the card type transceiver of the present invention has a receiving function for receiving an interrogation signal or a power supply carrier wave transmitted by microwave, and a receiving function for receiving an interrogation signal or a power supply carrier wave transmitted by microwave. In a card-type transceiver that is configured in a guard shape and has a transmission function of transmitting a response signal using microwaves using the interrogation signal or a carrier wave for power supply, the transceiver has transmitting and receiving antennas each consisting of a microstrip antenna on both sides of the card shape. It is configured by arranging.

Microstrip antennas disposed on both sides may be formed by sharing one ground plate.

(Function) Since transmitting and receiving antennas made of microstrip antennas are arranged on both sides of each of the 43 card-type transmitting and receiving devices, directivity of transmission and reception can be obtained on both sides, and transmission and reception can be performed no matter which side faces the interrogation device.

If the microstrip antennas disposed on both sides are formed using one ground plate in common, the number of laminated layers is reduced accordingly.

(Example) Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 3. 1 is an external perspective view of an embodiment of a card-type transceiver according to the present invention, FIG. 2 is a sectional view taken along the line B-B in FIG. 1, and FIG. FIG. 2 is a block circuit diagram of a system using a card-type transceiver as a response device. In Figures 1 to 3, the same as Figures 4 to 5.
Alternatively, equivalent members and the like are given the same reference numerals and redundant explanations are omitted.

In FIGS. 1 to 3, two low dielectric constant dielectric substrates 20. ．． A ground plate 23 made of a dielectric metal plate such as a copper plate is sandwiched between layers 20b and 20b, and microstrip resonators 21. .

21h and 22. ．． 22b are arranged respectively. In this way, the microstrip resonator 21. ．． 22
゜ and dielectric substrate 20. and an antenna 7 consisting of a ground plate 23, . 12. are formed with directivity on the surface of the laminate in FIG. 1 (the top surface in FIG. 2), and antennas 7b, 12. is formed with directivity on the back surface in FIG. 1 (lower surface in FIG. 2) of the laminate. The antennas 7, , 7b, 12. of the response device 4' are located approximately in the center of the stacked body. , circuit section 24 other than 12b
' is incorporated as appropriate. In this circuit section 24',
As shown in the response device 4' shown in FIG. 3, receiving antennas 7, . The signal received at 7b is passed through a supply line such as a through hole and a coupler 14 to a multiplier circuit 8 and '74.
This can be learned from the source rectifier circuit 9. Further, the signal outputted from the modulation circuit 11 and transmitted is transmitted from the distributor 15 via a through hole or the like to an antenna 12 for double-sided transmission. ．． 12b
and these two antennas 12. , 12b to the interrogation device ηl.

In the above embodiment, the antennas 7, 7, . ．． 7b
and an antenna +2.12. which transmits a response signal to the interrogation device 1 using the second harmonic 2f as a carrier wave. , 12b are provided separately, but the configuration may be such that 51 antennas transmit and receive the frequency f and the second harmonic 2f. The carrier wave transmitted from the card-type transceiver is not limited to the second harmonic, but may be a third or higher side wave, or may even be a frequency that is not related to harmonics. In addition, antennas 7, 7. , 71. , 12.12- , 12b is
It may be possible to transmit and receive any of water Y polarization, vertical polarization, and circular polarization, and transmission and reception may be of different polarization. Furthermore, antennas 7, , 7 provided on both sides
1. , 12-, and 12b need not be shared, and two antennas having the structures shown in FIGS. 4 and 5 may be stacked back to back.

(Effects of the Invention) Since the card-type transceiver of the present invention is configured as described above, it produces the effects described below.

Since the antenna is disposed on the card-shaped ii4[if, transmission and reception can be performed no matter which side faces the interrogation device.

Therefore, it is practically useful as an ID card, driver's license, etc. that can be identified without contact while being stored in a person's pocket, handbag, etc., since the troublesomeness of conventional usage is eliminated.

Then, the ground plate of the antenna formed on both sides is 1
If two sheets are used in common, the number of laminated layers will be reduced accordingly, which is advantageous for thinning.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of an embodiment of the card type transceiver of the present invention, FIG. 2 is a sectional view taken along the line B-B in FIG. 1, and FIG. FIG. 4 is a block circuit diagram of a system using a card-type transceiver as a response device; FIG. 4 is an external perspective view of an example of a conventional card-type transceiver;
The figure is a sectional view taken along the line AA in FIG. 4, and FIG. 6 is a block circuit diagram of a system using the card-type transceiver of FIG. 4 as a response device. 1: Questioning device, 4.4': Answering device, 7, 7.
, 7b, 12.12. , 12b: antenna,
20, 20. , 20b: dielectric substrate, 21, 21.
, 21b, 22.22. , 22b: Microstrip resonator, 23 Nige round plate. Patent applicant: Yokoo Manufacturing Co., Ltd. Yamatake Honeywell Co., Ltd.

Claims (2)

[Claims] (1) A receiving function for receiving an interrogation signal or a power supply carrier wave transmitted by microwaves, and a transmitting function for transmitting a response signal by microwaves using the received interrogation signal or power supply carrier wave, 1. A card-type transmitter-receiver configured in a card-shape, characterized in that transmitting and receiving antennas each comprising a microstrip antenna are arranged on both sides of the card-shape. (2) The card type transceiver according to claim 1, wherein the microstrip antennas arranged on both sides of the card shape are formed by sharing a single ground plate.