Title:
TRANSMISSION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2023/171720
Kind Code:
A1
Abstract:
This transmission circuit comprises: a first resistance value switching circuit that is connected to an antenna and is configured to be able to switch a resistance value; a second resistance value switching circuit that is connected to the antenna, is configured to be able to switch a resistance value, and is connected in parallel to the first resistance value switching circuit; a delay circuit that delays an input signal by 90 degrees and inputs a delay signal to the second resistance value switching circuit; a control unit that is configured to be able to switch the resistance values of the first resistance value switching circuit and the second resistance value switching circuit; and a synthetizing circuit that synthesizes a first output signal that is output from the first resistance value switching circuit with respect to the input signal and a second output signal that is output from the second resistance value switching circuit with respect to the delay signal, whereby the reflection coefficient of an antenna-side output terminal can be controlled to rotate in a complex plane.
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Inventors:
ISHIHARA NOBORU (JP)
ISOYAMA SHINJI (JP)
TSURU SHINSUKE (JP)
TOBA TATSUO (JP)
ISOYAMA SHINJI (JP)
TSURU SHINSUKE (JP)
TOBA TATSUO (JP)
Application Number:
PCT/JP2023/008881
Publication Date:
September 14, 2023
Filing Date:
March 08, 2023
Export Citation:
Assignee:
TOKYO INST TECH (JP)
KYOCERA CORP (JP)
KYOCERA CORP (JP)
International Classes:
H04B1/59; H01Q1/50; H04B5/02
Foreign References:
| JP2005202721A | 2005-07-28 | |||
| JP2022056139A | 2022-04-08 | |||
| JP2022056911A | 2022-04-11 |
Other References:
MAKISUKE MIZURU, SHINJI ISOYAMA, TOMONAO YUZAWA, TATSUO TOBA, NOBORU ISHIHARA, HIROYUKI ITO: "B-18-8 Study of SSB-RF backscatter circuit using capacitance switching control", PROCEEDINGS OF THE 2022 IEICE GENERAL CONFERENCE; MARCH 15TH TO 18TH, 2022, IEICE, JP, 1 March 2022 (2022-03-01) - 18 March 2022 (2022-03-18), JP, pages 319, XP009549154
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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