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VARIABLE PHASE SHIFTER, WIRELESS DEVICE USING THE SAME, AND PHASE ADJUSTING METHOD

PROBLEM TO BE SOLVED: To provide a phase shifter that can make fine adjustment and is made small, and a wireless device incorporating this phase shifter. SOLUTION: The phase shifter 100 is mainly composed of the main line 101, a stub 102 and a resistor 103. The main line 101 transmits high frequency signals. The stub 102 adjusts the phase of the high frequency signal transmitted on the main line 101, and its length determines the maximum amount of the variable phase. The resistor 103 connects the main line 101 and the stub 102. The resistor 103 can be a chip resistor or, a pattern of a microstrip line, a chip capacitor, or a chip inductor. The phase of the output signal is adjusted by changing the impedance of the resistor 103. COPYRIGHT: (C)2003,JPO ...

HIGH-FREQUENCY COAXIAL CONNECTOR, INSTALLATION STRUCTURE OF THE HIGH-FREQUENCY COAXIAL CONNECTOR, HIGH-FREQUENCY MODULE USING THE HIGH-FREQUENCY COAXIAL CONNECTOR AND THE INSTALLATION STRUCTURE, RECEPTION CIRCUIT USING THE HIGH-FREQUENCY COAXIAL CONNECTOR, TRANSMISSION CIRCUIT USING THE HIGH-FREQUENCY COAXIAL CONNECTOR, AND RADIO COMMUNICATION DEVICE USING THE TRANSMISSION CIRCUIT AND THE RECEPTION CIRCUIT

PROBLEM TO BE SOLVED: To solve a problem of deterioration of high-frequency characteristics wherein impedance differs from required impedance because of a difference of a connection position between a connector signal line and a board signal line caused by a difference of a thickness or the like of a high-frequency board. SOLUTION: This high-frequency connector has the high-frequency coaxial connector signal line 13a electrically conducted to the high-frequency board signal line 14a, and a high-frequency coaxial connector ground 13c electrically conducted to ground patterns 14c, 14d. The connector ground 13c has a high-frequency coaxial connector output board 13h having a high-frequency coaxial connector output line 13i transmitting a high-frequency signal transmitted by the connector signal line 13a to the high-frequency board 14. A high-frequency board signal line contact part 13i-1 of the connector output line 13i and a ground pattern contact part 13c-1 of the connector ground 13c are ...