Bypass filter, multi-band antenna switch circuit, and layered module composite part and communication device using them
First Claim
1. A filter circuit comprising a highpass filter and a serial resonance circuit between an input terminal and an output terminal,wherein said highpass filter comprises a first inductor connected between said input terminal and a ground, a first capacitor connected between said input terminal and said output terminal, and said serial resonance circuit comprises a second inductor connected to said output terminal and a second capacitor connected to said second inductor and said ground, such that said serial resonance circuit'"'"'s resonance frequency is 100 to 500 MHz, whereby said serial resonance circuit is used for electrostatic surge measures.
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
21 Claims
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1. A filter circuit comprising a highpass filter and a serial resonance circuit between an input terminal and an output terminal,
wherein said highpass filter comprises a first inductor connected between said input terminal and a ground, a first capacitor connected between said input terminal and said output terminal, and said serial resonance circuit comprises a second inductor connected to said output terminal and a second capacitor connected to said second inductor and said ground, such that said serial resonance circuit'"'"'s resonance frequency is 100 to 500 MHz, whereby said serial resonance circuit is used for electrostatic surge measures.
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3. 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 (9)
- a first switch circuit for switching lower-frequency signals branched by said diplexer to plural transmitting/receiving terminals;
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4. 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 (7, 10)
- 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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5. 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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6. 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 (8)
- 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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11. A multiband antenna switch circuit comprising
a notch filter connected between a switch circuit and an antenna terminal; -
(b) said switch circuit comprising at least a connection terminal connected to said notch filter, a first transmitting/receiving terminal and a second transmitting/receiving terminal; (c) a first diplexer comprising a first common terminal connected to said first transmitting/receiving terminal, a first transmitting terminal and a second receiving terminal; and (d) a second diplexer comprising a second common terminal connected to said second transmitting/receiving terminal, a second transmitting terminal and a first receiving terminal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification