Bypass filter, multi-band antenna switch circuit, and layered module composite part and communication device using them
3 Assignments
0 Petitions
Accused Products
Abstract
A multi-band antenna switch circuit including a diplexer connected to an antenna terminal for demultiplexing signals of different passing bands, a first and a second switch circuit for switching a high frequency signal and a low frequency signal demultiplexed by the diplexer to a plurality of transmission/reception terminals, a first and a second low pass filter connected to a transmission path between the diplexer and the transmission terminal or between the first and the second switch circuit and the transmission terminal, and a notch filter provided between the diplexer and the first switch circuit or between the diplexer and the second switch circuit. The multi-band antenna switch circuit includes a high pass filter having an input terminal and an output terminal and provided at least between die diplexer and the antenna terminal and including a first inductor connected between the input terminal and the ground, a first capacitor connected between the input terminal and the output terminal, a second inductor connected to the output terminal, and a second capacitor connected between the second inductor and the ground.
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Citations
39 Claims
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1-18. -18. cancel.
- 19. A highpass filter comprising an input terminal, an output terminal, and a serial resonance circuit, wherein said serial resonance circuit comprises a first inductor connected between said input terminal and a ground, a first capacitor connected between said input terminal and said output terminal, a second inductor connected to said output terminal, and a second capacitor connected to said second inductor and said ground, such that its resonance frequency is 100 to 500 MHz, whereby it is used for electrostatic surge measures.
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21. A multiband antenna switch circuit comprising a diplexer connected to an antenna terminal for branching signals having different passbands;
- a first switch circuit for switching lower-frequency signals branched by said diplexer to plural transmitting/receiving terminals;
a second switch circuit for switching higher-frequency signals branched by said diplexer to plural transmitting/receiving terminals;
a first lowpass filter connected to a transmitting line between said diplexer and said transmission terminal or between said first switch circuit and said transmission terminal;
a second lowpass filter connected to a transmitting line between said diplexer and said transmission terminal or between said second switch circuit and said transmission terminal; and
a notch filter disposed between said diplexer and said first switch circuit and/or between said diplexer and said second switch circuit. - View Dependent Claims (27, 28, 37, 38, 39)
- a first switch circuit for switching lower-frequency signals branched by said diplexer to plural transmitting/receiving terminals;
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22. A multiband antenna switch circuit comprising a diplexer connected to an antenna terminal for branching signals having different passbands;
- a first switch circuit for switching lower-frequency signals branched by said diplexer to a first transmission terminal and a first receiving terminal;
a second switch circuit for switching higher-frequency signals branched by said diplexer to a second transmission terminal, a second receiving terminal and a third transmitting/receiving terminal;
a first lowpass filter connected to a transmitting line between said diplexer and said first transmission terminal or between said first switch circuit and said first transmission terminal; and
a second lowpass filter connected to a transmitting line between said diplexer and said second transmission terminal or between said second switch circuit and said second transmission terminal, said diplexer and said second switch circuit being connected to each other via a notch filter. - View Dependent Claims (25)
- a first switch circuit for switching lower-frequency signals branched by said diplexer to a first transmission terminal and a first receiving terminal;
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23. A multiband antenna switch circuit comprising a diplexer for branching signals having different passbands;
- a first switch circuit for switching lower-frequency signals branched by said diplexer to plural transmitting/receiving terminals;
a second switch circuit for switching higher-frequency signals branched by said diplexer to plural transmitting/receiving terminals;
a first lowpass filter connected to a transmitting line between said diplexer and a transmission terminal or between said first switch circuit and said transmission terminal; and
a second lowpass filter connected to a transmitting line between said diplexer and said transmission terminal or between said second switch circuit and said transmission terminal, wherein a notch filter is connected between said diplexer and said antenna terminal.
- a first switch circuit for switching lower-frequency signals branched by said diplexer to plural transmitting/receiving terminals;
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24. A multiband antenna switch circuit comprising a diplexer for branching signals having different passbands;
- a first switch circuit for switching lower-frequency signals branched by said diplexer to a first transmission terminal and a first receiving terminal;
a second switch circuit for switching higher-frequency signals branched by said diplexer to a second transmission terminal, a second receiving terminal and a third transmitting/receiving terminal;
a first lowpass filter connected to a transmitting line between said diplexer and said first transmission terminal or between said first switch circuit and said first transmission terminal; and
a second lowpass filter connected to a transmitting line between said diplexer and said second transmission terminal or between said second switch circuit and said second transmission terminal, wherein a notch filter is connected between said diplexer and said antenna terminal. - View Dependent Claims (26)
- a first switch circuit for switching lower-frequency signals branched by said diplexer to a first transmission terminal and a first receiving terminal;
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29. A multiband antenna switch circuit comprising (a) a first diplexer comprising a first transmission terminal, a second receiving terminal and a first common terminal;
- (b) a second diplexer comprising a second transmission terminal, a first receiving terminal and a second common terminal;
(c) a switch circuit comprising a first transmitting/receiving terminal, a second transmitting/receiving terminal and an antenna terminal for switching either one of said first transmitting/receiving terminal and said second transmitting/receiving terminal to said antenna terminal, and (d) a notch filter disposed between said switch circuit and said antenna terminal, said first common terminal being connected to said first transmitting/receiving terminal, and said second common terminal being connected to said second transmitting/receiving terminal. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36)
- (b) a second diplexer comprising a second transmission terminal, a first receiving terminal and a second common terminal;
Specification