| 摘要 |
PROBLEM TO BE SOLVED: To provide a small multi-band high frequency switch used mainly in portable telephones. SOLUTION: A strip-line 12 that forms a multi-band high frequency switch 18 is formed by a series of a first strip-line 12a and a second strip-line 12b, the second transmission port 7 connected to the connection point between these in series elements via the third diode 16, the second control port 17 connected between the second transmission port 7 and the third diode 16, and the first receiving port 9 and the second receiving port 10 are connected, via a divider network 14, to the reception side port 8 of a multi-band high frequency switch 18.
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