PHASE SHIFTER AND ANTENNA DEVICE

WIPO Patent Application WO/2024/053040

A1

In order to provide a phase shifter or the like that can be stably controlled independent of the environmental temperature, this phase shifter comprises a 90-degree hybrid circuit and a variable-length stub group that includes two variable-length stubs connected to the 90-degree hybrid circuit. The variable-length stubs each comprise: a first switch that is connected to the 90-degree hybrid circuit and includes vanadium dioxide of a first composition that phase transitions in a first phase transition temperature range; a first stub that is connected to the first switch; a second switch that is connected to the first stub and includes vanadium dioxide of a second composition that phase transitions in a second phase transition temperature range higher than the first phase transition temperature range; and a second stub that is connected to the second switch and has an end grounded.

JP5029446	Phase shifter and phased array antenna
JP4192190	Phaser
WO/2008/081807	PHASE SHIFTER, AND ANTENNA

YOSHIDA KOHEI (JP)
WAKAFUJI KENJI (JP)
NIHEI RYOTA (JP)
HAYASHI KAZUYUKI (JP)
OKUMURA FUJIO (JP)

PCT/JP2022/033666

March 14, 2024

September 08, 2022

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NEC CORP (JP)

H01P1/18; H01Q3/36

US7642881B1	2010-01-05
JPH0897602A	1996-04-12

WILLIAMSON THOMAS G.; LUST MARK C.; GHALICHECHIAN NIMA: "Novel Ka-Band Phase Shifter Design Based on Vanadium Dioxide Switches for 5G Applications", 2022 IEEE INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION AND USNC-URSI RADIO SCIENCE MEETING (AP-S/URSI), IEEE, 10 July 2022 (2022-07-10), pages 49 - 50, XP034187644, DOI: 10.1109/AP-S/USNC-URSI47032.2022.9886855

KITAJIMA Hiroshi et al. (JP)

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