摘要:
A quadrifilar helical antenna comprising two pairs of filars having unequal lengths and phase quadrature signals propagating thereon. A conductive H-shaped impedance matching element matches a source impedance to an antenna impedance. The impedance matching element having a feed terminal at the center thereof from which current is supplied to the two filars of each filar pair disposed about an edge of the impedance matching element and symmetric with respect to a center of the impedance matching element. The impedance matching element further comprises a reactive element for matching the antenna and source impedances.
摘要:
The present invention relates to a tag anti-collision Radio Frequency Identification (RFID) system and a method for tag identification. The method for tag identification consists of a first step of initializing a queue (Q) field and storing a prefix of a candidate queue (CQ) field in the queue field; a second step of transmitting a query including the prefix stored in the queue field to the RFID tags, and deleting the transmitted prefix from the queue field; a third step of inserting a prefix, in which prefixes 0 and 1 are inserted into a rear portion of a prefix of a previously transmitted query, into the queue field if two or more tags respond to the previously transmitted prefix and, therefore, the tags cannot be identified, and inserting the prefix of the previously transmitted query into the candidate queue field and deleting an unnecessary prefix stored in the candidate queue if there is no response or only one tag responds with respect to the previously transmitted prefix; and a fourth step of determining whether a prefix stored in the queue field exists, and returning to the second step if there is a prefix stored in the queue field.
摘要:
The present invention relates to a tag anti-collision Radio Frequency Identification (RFID) system and a method for tag identification. The method for tag identification consists of a first step of initializing a queue (Q) field and storing a prefix of a candidate queue (CQ) field in the queue field; a second step of transmitting a query including the prefix stored in the queue field to the RFID tags, and deleting the transmitted prefix from the queue field; a third step of inserting a prefix, in which prefixes 0 and 1 are inserted into a rear portion of a prefix of a previously transmitted query, into the queue field if two or more tags respond to the previously transmitted prefix and, therefore, the tags cannot be identified, and inserting the prefix of the previously transmitted query into the candidate queue field and deleting an unnecessary prefix stored in the candidate queue if there is no response or only one tag responds with respect to the previously transmitted prefix; and a fourth step of determining whether a prefix stored in the queue field exists, and returning to the second step if there is a prefix stored in the queue field.
摘要:
Disclosed herein are an authentication and payment system and method. The authentication and payment system of the present invention includes an issuer server, an issuer information management intermediate server, an acquirer server and a payment server. The issuer server issues, manages and operates payment means. The issuer information management intermediate server manages URL information required to access domestic and foreign issuer servers. The acquirer server performs payment approval and performs acquisition and settlement for member stores. The payment server intermediates between the issuer server and the acquirer server to provide an authentication and payment service in response to a request from a terminal of the merchant. Accordingly, the present invention can provide a safe and convenient payment process with respect to payment means, such as credit cards, electronic money or mobile phone micro payment that can be selected between a purchaser and a merchant.
摘要:
Disclosed herein are an authentication and payment system and method. The authentication and payment system of the present invention includes an issuer server, an issuer information management intermediate server, an acquirer server and a payment server. The issuer server issues, manages and operates payment means. The issuer information management intermediate server manages URL information required to access domestic and foreign issuer servers. The acquirer server performs payment approval and performs acquisition and settlement for member stores. The payment server intermediates between the issuer server and the acquirer server to provide an authentication and payment service in response to a request from a terminal of the merchant. Accordingly, the present invention can provide a safe and convenient payment process with respect to payment means, such as credit cards, electronic money or mobile phone micro payment that can be selected between a purchaser and a merchant.
摘要:
A method and a system of creating and transmitting multimedia contents are disclosed. The method is implemented in a multimedia content creating and transmitting system which includes a multimedia content producing/management server which can be connected with transmitting and receiving terminals through wired or wireless communication networks. The method comprises receiving a multimedia content constructing instruction through a communication networks, creating content according to the multimedia content constructing instruction, encoding the created content, and providing the encoded content to a receiving terminal through the communication networks. According to the method, various contents that correspond to various types of transmitting and/or receiving terminals can be produced, edited, converted, transmitted, received, and played back.