Front end module and high-frequency functional module,High-frequency module,High-power terahertz continuous wave two-dimensional imaging system,Band pass filter and duplexer,Duplexer

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A duplexer is an electronic device that allows bi-directional (duplex) communication over a single path. In radar and radio communications systems, it isolates the receiver from the transmitter while permitting them to share a common antenna. Most radio repeater systems include a duplexer. Duplexers can be based on frequency (often a waveguide filter), polarization (such as an orthomode transducer), or timing (as is typical in radar).

Front end module and high-frequency functional module

InactiveUS20040240420A1High combination and integrationSmall sizeSolid-state devicesRadio transmission for post communicationCdma signalEngineering

A front end module comprises a diplexer, a high frequency switch and a duplexer. The diplexer has a first port connected to an antenna, a second port for receiving and outputting GSM signals, and a third port for receiving and outputting W-CDMA signals. The high frequency switch is connected to the second port and separates GSM transmission signals and reception signals from each other. The duplexer is connected to the third port and separates W-CDMA transmission signals and reception signals from each other. The duplexer includes two acoustic wave elements. A single multi-layer substrate for integration is used to integrate the diplexer, the high frequency switch and the duplexer.

Owner:SNAPTRACK

High-frequency module

ActiveUS20130141180A1Improve transmission characteristicsImprove design flexibilityMultiple-port networksOne-port networksImpedance matchingCharacteristic impedance

A high-frequency module has a structure including balanced terminals, with high design flexibility and good transmission characteristics. Wiring patterns to be connected to balanced terminals of SAW filters of SAW duplexers are located on a second layer to a sixth layer of a layered body. The characteristic impedances of first wiring patterns defining a pair of parallel or substantially parallel lines match, the characteristic impedances of second wiring patterns defining a pair of parallel or substantially parallel lines match, the characteristic impedances of third wiring patterns defining a pair of parallel or substantially parallel lines match, and the characteristic impedances of fourth wiring patterns defining a pair of parallel or substantially parallel lines match.

Owner:MURATA MFG CO LTD

High-power terahertz continuous wave two-dimensional imaging system

InactiveCN105866773ALow costSimple structureRadio wave reradiation/reflectionImaging processingImage resolution

The invention discloses a high-power terahertz continuous wave two-dimensional imaging system which comprises a duplexer, a two-dimensional scanning platform, a terahertz continuous wave emitting module, a terahertz continuous wave receiving module, a TPX lens, a data collecting and processing module, an image processing module and an image display unit. The high-power terahertz continuous wave two-dimensional imaging system has the advantages that frequency exists at the terahertz wave band, the emitting power of the emitting module is high, and the system is simple in structure, small in size and high in resolution ratio.

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Owner:JILIN UNIV

Band pass filter and duplexer

ActiveUS20170117873A1Increase steepnessImprove isolation characteristicsImpedence networksResonanceBand-pass filter

A band pass filter includes a longitudinally coupled resonator elastic wave filter on a piezoelectric substrate and parallel arm resonators at parallel arms, each connected between a series arm connecting an antenna terminal and a receiving terminal and one of ground terminals. The parallel arm resonators include a first parallel arm resonator having the highest resonance frequency among the parallel arm resonators and a second parallel arm resonator. A second ground terminal that is one of the ground terminals connected to the second parallel arm resonator and a third ground terminal that is one of the ground terminals connected to the longitudinally coupled resonator elastic wave filter are connected to each other. A first ground terminal that is one of the ground terminals connected to the first parallel arm resonator is not connected to the second or third ground terminals.

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Owner:MURATA MFG CO LTD

Duplexer

InactiveCN107276555AMultiple-port networksInterconnectionDuplexer

The invention discloses a duplexer, which comprises a piezoelectric substrate and an electrode structure formed on the piezoelectric substrate. The electrode structure includes a transmitting pad, a receiving pad, a ground wire electrode pad, a signal wiring electrode, An annular pad and an interconnection line, the piezoelectric substrate is provided with a transmitting filter and a receiving filter, the transmitting pad is connected to the transmitting filter through a connecting line, and the receiving pad is connected to the receiving filter through a connecting line , the ground electrode pad is connected to the ground potential, the annular pad wraps the transmitting pad and the receiving pad, the ground electrode pad is connected to the ring pad through an interconnection wire, and the ring pad is connected to the ring pad through an interconnection wire The signal wiring electrode is connected to the transmitting pad and the receiving pad, and the signal wiring electrode is connected to the transmitting pad, thereby improving the isolation effect of the duplexer.

Owner:CHENGDU FUYOUTE TECH CO LTD