CN2872619Y

CN2872619Y - Antenna configuration with radio-frequency distinguishing label

Info

Publication number: CN2872619Y
Application number: CN 200520113471
Authority: CN
Inventors: 邱建智
Original assignee: Wha Yu Industrial Co Ltd
Current assignee: Wha Yu Industrial Co Ltd
Priority date: 2005-07-12
Filing date: 2005-07-12
Publication date: 2007-02-21
Anticipated expiration: 2015-07-12

Abstract

The utility model discloses an antenna structure in wireless radio frequency identification label. The antenna structure comprises an antenna formed by coating a conductive material onto a carrier, and an IC chip electrically connected with the antenna. The first and the second radiation parts of the antenna are connected with the IC chip and extend from the connecting parts in opposite directions while spirally enlarging to maintain a certain distance between the two radiation parts. Thus, the wireless radio frequency identification label can be miniaturized and the electric field can be circularly polarized.

Description

The antenna of radio RF identification label constitutes

Technical field

The antenna that the utility model relates to a kind of radio RF identification label constitutes, and is meant the innovation formation and the design of space kenel of antenna especially.

Background technology

Radio frequency identification system (Radio Frequency Identification, abbreviation RFID) label (TAG) is meant the assembly common name that IC and antenna constitute, as long as the read write line (READER/WRITER) that collocation is special-purpose, just can read or write data from the outside, because the characteristic of RFID, being can be in the wireless data transmission mode, the information such as attribute of rapid identification article, the user just can correctly grasp the trend of article according to this, to reach the efficient activity of logistics, therefore the trend that replaces traditional commodity bar code and magnetic card gradually arranged.

The price of RFID TAG, be by the IC chip, the cost that antenna and packing are made combines, utilizing the miniaturization of RFID TAG to reduce cost is present trend, but, the size of resonance type antenna is that the wavelength with electric wave has direct relation, size with the resonance type antenna, wavelength as the 915MHZ frequency of UHF frequency band is about 32.8 centimeters, general half-wave antenna (dipole antenna) length is half of wavelength approximately, if the 915MHZ half-wave antenna of UHF frequency band, length about 16.4 centimeters then must be arranged, therefore the antenna size of the RFID label (RFID TAG) of UHF frequency band is still long, this cost that causes the RFID label of naming a person for a particular job promotes, also can't miniaturization and meet the expectation in market.

Reach by read write line because of the read-write of passive type RFID label data and the supply of electric power again, antenna in the RFID label is received the electric wave that antenna produced of read write line, in the inner mechanism that forms resonance or tool radiation of label antenna, and then the generation electric current also can exchange the data between read write line and the RFID label, when the antenna of the antenna of RFID label or read write line all uses the electromagnetic wave transmitting-receiving to be the linearly polarized antenna form, if it is uncertain or put angle and can cause read write line and RFID label antenna to be staggered the polarization (Cross Polarization) mutually and can't be fixed as same polarization face the time with the position of the commodity of RFID label, that is the antenna of RFID label may be that antenna with the staggered polarised direction of horizontal or vertical or multi-angle over the ground and read write line carries out electric wave and reads, when the polarised direction of the polarised direction of RFID label and read write line is inconsistent, the reception distance of RFID label will significantly be shortened, What is more, will cause read write line can't read the problem of RFID label data.

The utility model content

At the above-mentioned existing inconsistent existing problem and shortage of staggered polarization (Cross Polarization) that is produced between RFID label sizes and RFID label antenna and read write line transfer of data of dwindling, the purpose of this utility model provides a kind of antenna formation that has more desirable practicality, radio RF identification label that effect is more complete.

The utility model is achieved in that a kind of antenna of radio RF identification label constitutes, the antenna that adheres to the conductivity material by carrier, and IC chip and antenna electrically connect arranged, wherein first and second radiant body of this antenna respectively with the IC chip attach, first and second radiant body of this antenna is to be reverse extension mutually by the junction of IC chip respectively, and gradually shape is circled round and is enlarged suitable length and constitute, so that first and second radiant body keeps suitable spacing, and with Clothoid type shared antenna structure; Thus, can make radio RF identification label reach the Practical Benefit of miniaturization and electric field circular polarization.

The utility model utilizes first and second Department of Radiation of antenna to be Clothoid type and is arranged in carrier, can effectively solve traditional RFID label antenna is to impel the long shortcoming of label towards the extension of two sides, so can effectively reach the advantage of RFID label miniaturization, and have the economic benefit of lower production cost.The utility model utilizes first of antenna, two Departments of Radiation are the special shape that Clothoid type is arranged, can make the electric field circular polarization of antenna, that is, the antenna of RFID label is directly electric wave to be circumference formula direction of rotation and read write line to carry out the electric wave exchanges data and read, even if the antenna of read write line is the linearly polarized antenna form, or put angle with the commodity of RFID label and do not fix, still can carry out data read with read write line with long distance, like this utility model not only can solve traditional RFID label often with read write line correctly reading of data maybe must shorten the two apart from the problem that just can read, more can bring into play than long-range data transmission and making the commercialization utilization more convenient.

Description of drawings

Fig. 1 is the schematic perspective view of the utility model preferred embodiment;

Fig. 2 is the floor map of Fig. 1;

Fig. 3 is the schematic perspective view of another preferred embodiment of the utility model;

Fig. 4 is the floor map of Fig. 3;

Fig. 5 is the floor map of the another preferred embodiment of the utility model.

Embodiment

Following conjunction with figs. is elaborated to the utility model.

As Fig. 1, shown in 2, the preferred embodiment that constitutes for the antenna of the utility model radio RF identification label, the utility model comprises: the antenna 20 that is adhered to the conductivity material by carrier 10, and IC chip 30 and antenna 20 electrically connects are arranged, wherein first of this antenna 20, two

radiant bodies

21,22 link with IC chip 30 respectively, first of this antenna, two

radiant bodies

21,22 are reverse extension mutually by the junction of IC chip 30 respectively, and gradually shape is circled round and is enlarged a suitable length and constitute, so that first, two

radiant bodies

21,22 possess suitable spacing, and with common structure one antenna structure of Clothoid type, thus, can make radio RF identification label reach the practical function of miniaturization and electric field circular polarization.

The antenna of radio RF identification label of the present utility model constitutes, and wherein carrier can be the dielectric medium substrate.

The antenna of radio RF identification label of the present utility model constitutes, and wherein this carrier can be various commodity or packaging material.

The utility model utilizes first and second Department of Radiation 21,22 of antenna 20 to be Clothoid type and is arranged in carrier 10, can effectively solve traditional RFID label antenna is to impel the long shortcoming of label towards the extension of two sides, so can effectively reach the advantage of RFID label miniaturization, and have the economic benefit of lower production cost.

The utility model utilizes first of antenna 20, two Departments of

Radiation

21,22 are the special shape that Clothoid type is arranged, can make the electric field circular polarization of antenna 20, that is, the antenna 20 of RFID label is directly electric wave to be circumference formula direction of rotation and read write line to carry out the electric wave exchanges data and read, even if the antenna of read write line is the linearly polarized antenna form, or put angle with the commodity of RFID label and do not fix, still can carry out data read with read write line with long distance, like this utility model not only can solve traditional RFID label often with read write line correctly reading of data maybe must shorten the two apart from the problem that just can read, more can bring into play than long-range data transmission and making the commercialization utilization more convenient.

Above-mentioned basic antenna 20 profiles must be used for performance, cost or other design factor are carried out optimization, the antenna 20 profile embodiment shown in Fig. 3,4,5.

Claims

1, a kind of antenna of radio RF identification label constitutes, the antenna that adheres to the conductivity material by carrier, and IC chip and antenna electrically connect arranged, wherein first and second radiant body of this antenna respectively with the IC chip attach, it is characterized in that: first and second radiant body of this antenna is to be reverse extension mutually by the junction of IC chip respectively, and gradually shape is circled round and is enlarged suitable length and constitute, so that first and second radiant body keeps suitable spacing, and with Clothoid type shared antenna structure.

2, the antenna of radio RF identification label according to claim 1 constitutes, and it is characterized in that: described carrier can be the dielectric medium substrate.