Title:
HIGH-FREQUENCY SWITCH CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2001/022523
Kind Code:
A1
Abstract:
A high-frequency switch circuit that controls pass/block of a signal transmitted through a high-frequency transmission line by arranging a switching element between the high-frequency transmission line and the ground. An impedance matching circuit is constituted by an adjusting transmission line comprising at least two lines having different line impedance and connected in series to adjust the reflection coefficient. The line impedance and the length of each line constituting the adjusting transmission line are determined so as to satisfy A = 0, B = jZ, C = j/Z, and D=0 where A, B, C and D are respectively the elements W¿11?, W¿12?, W¿21? and W¿22? of a transmission matrix (W) of a cascade circuit comprising the capacitance of a switching element in an OFF state and the adjusting transmission line, and Z is the impedance when viewed from the connecting terminal.
Inventors:
UDA HISANORI (JP)
HAYASHI HIROAKI (JP)
HAYASHI HIROAKI (JP)
Application Number:
PCT/JP2000/006458
Publication Date:
March 29, 2001
Filing Date:
September 20, 2000
Export Citation:
Assignee:
TOYODA CHUO KENKYUSHO KK (JP)
UDA HISANORI (JP)
HAYASHI HIROAKI (JP)
UDA HISANORI (JP)
HAYASHI HIROAKI (JP)
International Classes:
H01P1/15; (IPC1-7): H01P1/15
Foreign References:
| JPH02108301A | 1990-04-20 | |||
| JP2000058767A | 2000-02-25 | |||
| JPH10284901A | 1998-10-23 | |||
| JPS63161701A | 1988-07-05 | |||
| JPH02189001A | 1990-07-25 | |||
| JPH10335901A | 1998-12-18 |
Attorney, Agent or Firm:
Fujitani, Osamu (Ichiyanagi Dohri 1-chome Nakagawa-ku, Nagoya-shi Aichi, JP)
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