摘要:
A housing of a mobile device including a frame defining a perimeter of the mobile device, the frame including a first metal material and configured to operate as a first antenna for a first wireless communication, and a cover configured to cover one surface of the mobile device, the cover including a second metal material, and the cover and at least a portion of the frame configured to operate as a second antenna for a second wireless communication may be provided.
摘要:
Provided are a Radio Frequency IDentification (RFID) tag with a signal reception method. The RFID tag includes a demodulator that receives a read signal containing read data. The demodulator includes; a voltage generating circuit that provides a first voltage signal and a second voltage signal derived from the received read signal, an inverter that provides a data pulse signal indicative of the read data by inverting the second voltage signal using an inverting voltage defined in relation to the first voltage signal, and a buffer that recovers the read data by buffering the data pulse signal.
摘要:
An internal voltage generating circuit includes a first voltage application unit, a second voltage application unit, a first regulator, a second regulator, and a controller. The first and second voltage application units respectively provide a first voltage and a second voltage. The controller generates a bulk voltage, a first control signal, and a second control signal from the first and second voltages. The first regulator is enabled or disabled according to the first control signal and generates and outputs the first internal voltage based on the bulk voltage, the first voltage, and a first reference voltage. The second regulator is enabled or disabled according to the second control signal and generates and outputs the second internal voltage based on the bulk voltage, the second voltage, and a second reference voltage.
摘要:
A high-integrated duplexer and a fabrication method thereof. The duplexer has a first filter to pass a signal of a transmitted frequency band, a second filter to pass a signal of a received frequency band, an embedded PCB having the first and second filters bonded on a certain area of a surface of an upper side in a predetermined distance from each other, and an isolation part to prevent a signal interference between the first and second filters, and a packaging substrate to package the entire upper side of the embedded PCB so that the packaging substrate is located above and separated from the first and second filters by a predetermined distance. The fabricated high-integrated duplexer has a small size and high performance.
摘要:
An integrated circuit structure in which a plurality of Schottky diodes and a capacitor are integrally formed. The integrated circuit structure includes a substrate including an N-type semiconductor doped with N-type impurities and a P-type semiconductor doped with P-type impurities; a first conductive layer laminated on the substrate so that the first conductive layer is electrically connected to the N-type semiconductor and the P-type semiconductor; a dielectric layer laminated on an upper surface of the first conductive layer; and a second conductive layer laminated on an upper surface of the dielectric layer so that the second conductive layer forms a capacitor together with the first conductive layer and the dielectric layer. Accordingly, when the integrated circuit structure is used in a rectification circuit, the size of an entire circuit can be reduced.
摘要:
An oscillator tuning system and an oscillator tuning method are provided. The system includes a determination unit which determines whether a power which is used in an RFID tag having an RFID oscillator is greater than a reference value; and a frequency tuner which tunes a driving frequency of the RFID oscillator according to a result of the determination. The method includes determining whether a power which is used in an RFID tag having an RFID oscillator is greater than a reference value; and tuning a driving frequency of the RFID oscillator according to a result of the determination.
摘要:
A radio frequency identification tag (RFID) that extends a read range of an RFID reader, and an RFID system including the RFID tag. The RFID tag includes a tag antenna, an IC, and a bonding part electrically connecting the tag antenna to the IC. A complex conjugate of an impedance of the tag antenna is a value obtained by adding an impedance of the IC to an impedance of the bonding part. Thus, the RFID tag can achieve accurate impedance matching between the tag antenna and the bonding, smoothly perform data communication with the RFID reader, and extend the read range of the RFID reader.
摘要:
A film bulk acoustic resonator, and a method for manufacturing the same. The film bulk acoustic resonator includes a substrate, a protection layer vapor-deposited on the substrate, a membrane vapor-deposited on the protection layer and at a predetermined distance from an upper side of the substrate, and a laminated resonance part vapor-deposited on the membrane. Further, the manufacturing method includes vapor-depositing a membrane on a substrate, forming protection layers on both sides of the membrane, vapor-depositing a laminated resonance part on the membrane, and forming an air gap by removing a part of the substrate disposed between the protection layers. Accordingly, the membrane can be formed in a simple structure and without stress, and the whole manufacturing process is simplified.
摘要:
An over-voltage protection circuit (i.e., a limiter), includes: a first switching block having a plurality of semiconductor elements, serially connected to each other and turned on in sequence according to the magnitude of an input voltage; and a plurality of second switching blocks, in which each of the second switching blocks includes a pair of serially connected semiconductor elements having different current properties. The second switching blocks are connected in parallel to the first switching block. By minimizing a leakage current when an input voltage is below a reference voltage and by maximizing a leakage current when the input voltage is above the reference voltage, the limiter prevents excessive current from flowing into the RF tag circuit when the input voltage is below the reference voltage, and ensures that a sufficient amount of current is supplied to a regulator when the input voltage is below the reference voltage.
摘要:
A MEMS RF-switch is provided for controlling switching on/off of transmission of AC signals. The MEMS RF-switch of the present invention includes: a first electrode coupled to one terminal of the power source; a semiconductor layer combined with an upper surface of the first electrode, and forming a potential barrier to become insulated when a bias signal is applied from the power source; and a second electrode disposed at a predetermined distance away from the semiconductor layer, and being coupled to the other terminal of the power source, wherein the second electrode contacts the semiconductor layer when a bias signal is applied from the power source. Therefore, although the bias signal may not be cut off, free electrons and holes are recombined in the semiconductor layer, whereby charge buildup and sticking can be prevented.