Abstract:
A broadband filter of a suspended substrate structure is provided to secure a broadband and a wide stop band by inducing a load capacitance between a T type resonant circuit and a ground pattern. A broadband filter of a suspended substrate structure comprises a dielectric(111), an input line(112), an output line(118), a first resonant line(113), a second resonant line(115), and a bridge line(114). The dielectric has a predetermined dielectric constant. The input line is formed in one side of an upper surface of the dielectric. The output line is formed in the other side of a lower surface of the dielectric. The first resonant line and the second resonant line are formed on the lower surface of the dielectric, and have a T shape. The first resonant line is formed on a position corresponding to the input line. The second resonant line is formed on a position corresponding to the output line. The bridge line connects the first resonant line to the second resonant line. Both ends of the bridge line are connected to the ground pattern formed in a side of the dielectric.
Abstract:
The present invention relates to a method for configuring a physical layer of a low frequency band based on wireless magnetic field communication, and a computer-readable recording medium including a program for executing the method. The method supports the proper packet format, coding mode, and modulation mode between a master and a slave in order to enable wireless communication in variable data rate or coding modes depending on a peripheral environment in a low frequency band based on wireless magnetic field communication which is applied to a difficult environment. The method of the invention is characterized by changing the data rate and the coding mode of a payload field within a preset range depending on the peripheral communication environment, wherein the payload field is included in the request and response frames between the master and the slave. The request and response frames can be configured in the same format in the above-mentioned configuration and respectively include a preamble field, a header field, and the payload field.
Abstract:
PROBLEM TO BE SOLVED: To provide a positive electrode material for a secondary battery containing an electrode material composed of a manganese fluorophosphate containing lithium or sodium, and a method for manufacturing the same.SOLUTION: A positive electrode material for a secondary battery has a particle size of 1 nm or more and 100 nm or less, shows a potential flat part in the region of 3.7 to 4.0 V of the discharge curve, is coated with carbon to enhance conductivity, and contains a compound represented by the formula: AMnPOF, where A represents Li or Na, or a mixture thereof, and 0
Abstract:
Disclosed herein is a wireless communication method for a magnetic field communication network. The wireless communication method is performed by a coordinator on the magnetic field communication network. The wireless communication method includes transmitting a request signal used to request response to each of sensor nodes; selecting any one of response signals received from the sensor nodes; transmitting an acknowledgement signal to a sensor node corresponding to the response signal; selecting any one of response signals transmitted again from sensor nodes which did not receive the acknowledgement signal; and transmitting an acknowledgement signal to a sensor node corresponding to the selected response signal.
Abstract:
The present invention relates to a method for configuring a physical layer of a low frequency band based on wireless magnetic field communication, and a computer-readable recording medium including a program for executing the method. The method supports the proper packet format, coding mode, and modulation mode between a master and a slave in order to enable wireless communication in variable data rate or coding modes depending on a peripheral environment in a low frequency band based on wireless magnetic field communication which is applied to a difficult environment. The method of the invention is characterized by changing the data rate and the coding mode of a payload field within a preset range depending on the peripheral communication environment, wherein the payload field is included in the request and response frames between the master and the slave. The request and response frames can be configured in the same format in the above-mentioned configuration and respectively include a preamble field, a header field, and the payload field.
Abstract:
PROBLEM TO BE SOLVED: To provide a wireless system used for managing an underground facility, more specifically, a wireless communication system for managing an underground facility, capable of providing status information of the underground facility through accurate measurements in harsh underground environments of a wireless communication. SOLUTION: The wireless communication system for managing an underground facility includes, at least many sensor nodes which are attached to the underground facility and output a sensing signal via magnetic field communication, after sensing the status information of the underground facility according to a driving signal containing a transmitted wake-up signal, and an information collecting device which is configured so that the driving signal is output at the sensor node; the sensing signal transmitted from the sensor node is collected; and the collected information is transmitted to a monitoring system via short-range wireless communication. COPYRIGHT: (C)2010,JPO&INPIT