High frequency switch
A compact high frequency switch needing no external control signal is obtained. The high frequency switch includes an anti-parallel diode (first anti-parallel diode) having one end and another end coupled with an antenna terminal (first high-frequency-signal input/output terminal) and a transmitting terminal (second high-frequency-signal input/output terminal), respectively, and becoming a conduction state in the input power not less than predetermined high frequency power. When the high frequency switch is an SPDT type, such a switch may include a ¼-wavelength line in the use frequency of the high frequency switch having one end and another end coupled with the antenna terminal and a receiving terminal (third high-frequency-signal input/output terminal), respectively, and an anti-parallel diode (second anti-parallel diode) coupled between the receiving terminal and a ground and becoming a conduction state in the input power not less than predetermined high frequency power.
1. A high frequency switch comprising;
a first anti-parallel diode which includes two or more anti-parallel diodes connected in series, one end of the first anti-parallel diode being coupled with a first high-frequency-signal input/output terminal, another end of the first anti-parallel diode being coupled with a second high-frequency-signal input/output terminal, and the first anti-parallel diode becoming a conduction state when input power of equal to or greater than a predetermined high frequency power is input;
a first inductance that is coupled in parallel with the first anti-parallel diode; and
a second inductance coupled between any terminal of the two or more anti-parallel diodes of the first anti-parallel diode and a ground.
2. The high frequency switch according to claim 1 , further comprising a ¼-wavelength line in a use frequency of the high frequency switch, the ¼-wavelength line including one end coupled with the first high-frequency-signal input/output terminal and another end coupled with a third high-frequency-signal input/output terminal.
3. A high frequency switch comprising;
a first anti-parallel diode which includes two or more anti-parallel diodes connected in series, one end of the first anti-parallel diode being coupled with a first high-frequency-signal input/output terminal, another end of the first anti-parallel diode being coupled with a second high-frequency-signal input/output terminal, and the first anti-parallel diode becoming a conduction state when input power of equal to or greater than a predetermined high frequency power is input;
a first ¼-wavelength line in a use frequency of the high frequency switch, the first ¼-wavelength line being coupled in series between two of the two or more anti-parallel diodes of the first anti-parallel diode;
a first inductance coupled in parallel with the first anti-parallel diode; and
a second inductance coupled between any terminal of the two or more anti-parallel diodes of the first anti-parallel diode and a ground.
4. The high frequency switch according to claim 3 , further comprising a second ¼-wavelength line in the use frequency of the high frequency switch, the second ¼-wavelength line including one end coupled with the first high-frequency-signal input/output terminal and another end coupled with a third high-frequency-signal input/output terminal.
5. A high frequency switch comprising:
a first anti-parallel diode which includes two or more anti-parallel diodes connected in series, one end of the first anti-parallel diode being coupled with a first high-frequency-signal input/output terminal, another end of the first anti-parallel diode being coupled with a second high-frequency-signal input/output terminal, and the first anti-parallel diode becoming a conduction state when input power of equal to or greater than a predetermined high frequency power is input;
a first ¼-wavelength line in a use frequency of the high frequency switch, the first ¼-wavelength line including one end coupled with the first high-frequency-signal input/output terminal and another end coupled with a third high-frequency-signal input/output terminal;
a second anti-parallel diode which is coupled between the third high-frequency-signal input/output terminal and a ground, the second anti-parallel diode becoming a conduction state when input power of equal to or greater than predetermined high frequency power is input;
a first inductance that is coupled in parallel with the first anti-parallel diode; and
a second inductance coupled between any terminal of the two or more anti-parallel diodes of the first anti-parallel diode and the ground.
6. A high frequency switch comprising:
a first anti-parallel diode which includes two or more anti-parallel diodes connected in series, one end of the first anti-parallel diode being coupled with a first high-frequency-signal input/output terminal, another end of the first anti-parallel diode being coupled with a second high-frequency-signal input/output terminal, and the first anti-parallel diode becoming a conduction state when input power of equal to or greater than a predetermined high frequency power is input;
a first ¼-wavelength line in a use frequency of the high frequency switch, the first ¼-wavelength line including one end coupled with the first high-frequency-signal input/output terminal and another end coupled with a third high-frequency-signal input/output terminal;
a second anti-parallel diode which is coupled between the third high-frequency-signal input/output terminal and a ground, the second anti-parallel diode becoming a conduction state when input power of equal to or greater than predetermined high frequency power is input; and
a second ¼-wavelength line in the use frequency of the high frequency switch, the second ¼-wavelength line being coupled in series between two of the two or more anti-parallel diodes of the first anti-parallel diode.
7. The high frequency switch according to claim 6 , further comprising an inductance coupled between the first anti-parallel diode coupled with the second high-frequency-signal input/output terminal at the first high-frequency-signal-input/output-terminal side and the ground.
8. A high frequency switch, comprising:
a first anti-parallel diode which includes two or more anti-parallel diodes connected in series, one end of the first anti-parallel diode being coupled with a first high-frequency-signal input/output terminal, another end of the first anti-parallel diode being coupled with a second high-frequency-signal input/output terminal, and the first anti-parallel diode becoming a conduction state when input power of equal to or greater than a predetermined high frequency power is input;
a first ¼-wavelength line in a use frequency of the high frequency switch which includes one end coupled with the first high-frequency-signal input/output terminal and another end coupled with a third high-frequency-signal input/output terminal;
a second anti-parallel diode which is coupled between the third high-frequency-signal input/output terminal and a ground, the second anti-parallel diode becoming a conduction state when input power of equal to or greater than predetermined high frequency power is input;
a first inductance coupled in parallel with the first anti-parallel diode; and
a second inductance coupled between any terminal of the two or more anti-parallel diodes of the first anti-parallel diode and a ground.
9. A high frequency switch comprising;
a first anti-parallel diode which includes one end coupled with a first high-frequency-signal input/output terminal and another end coupled with a second high-frequency-signal input/output terminal, the first anti-parallel diode becoming a conduction state when input power of equal to or greater than a predetermined high frequency power is input;
a first inductance coupled between the first anti-parallel diode coupled with the second high-frequency-signal input/output terminal at the first high-frequency-signal-input/output-terminal side and a ground; and
a second inductance coupled in parallel with the first anti-parallel diode.
10. The high frequency switch according to claim 9 , further comprising a ¼-wavelength line in a use frequency of the high frequency switch, the ¼-wavelength line including one end coupled with the first high-frequency-signal input/output terminal and another end coupled with a third high-frequency-signal input/output terminal.
11. The high frequency switch according to claim 10 , further comprising a second anti-parallel diode which is coupled between the third high-frequency-signal input/output terminal and a ground, the second anti-parallel diode becoming a conduction state when input power of equal to or greater than predetermined high frequency power is input.
12. The high frequency switch according to claim 9 , wherein
the first anti-parallel diode comprises two or more anti-parallel diodes connected in series, and
the high frequency switch further comprises a ¼-wavelength line in a use frequency of the high frequency switch, the ¼-wavelength line being coupled in series between two of the two or more anti-parallel diodes of the first anti-parallel diode.