Antenna switch circuit and antenna switch module
First Claim
1. An antenna switch circuit connected to a common antenna for switching the connection of said antenna to a transmission circuit or a receiving circuit in plural transmitting/receiving systems having different passbands, comprisinga diplexer circuit comprising a low-pass filter and a high-pass filter;
- a first switch circuit connected to said low-pass filter and comprising pin-junction diodes, transmission lines and at least one capacitor for switching a transmitting line and a receiving line;
a second switch circuit connected to said high-pass filter and comprising pin-junction diodes, transmission lines and at least one capacitor for switching a transmitting line and a receiving line;
a third switch circuit comprising FET switches connected to said first switch circuit for switching said receiving line from said first switch circuit; and
a fourth switch circuit comprising FET switches connected to said second switch circuit for switching said receiving line from said second switch circuit,wherein said third and fourth switch circuits share a control power terminal.
2 Assignments
0 Petitions
Accused Products
Abstract
An antenna switch module connected to a common antenna for switching the connection of the antenna to a transmission circuit or a receiving circuit in plural transmitting/receiving systems having different passbands, comprising a diplexer circuit comprising a low-pass filter and a high-pass filter; a first switch circuit connected to the low-pass filter and for switching a transmitting line and a receiving line, a second switch circuit connected to the high-pass filter for switching a transmitting line and a receiving line; a third switch circuit connected to the first switch circuit for switching the receiving line from the first switch circuit; and a fourth switch circuit connected to the second switch circuit for switching the receiving line from the second switch circuit; at least part of transmission lines constituting LC circuits in the diplexer circuit and the first and second switch circuits being electrode patterns formed in a multilayer substrate constituted by plural dielectric layers; and chip elements constituting part of the LC circuits, diode elements constituting the first and second switch circuits, and semiconductor elements constituting the third and fourth switch circuits being mounted onto the multilayer substrate.
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Citations
11 Claims
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1. An antenna switch circuit connected to a common antenna for switching the connection of said antenna to a transmission circuit or a receiving circuit in plural transmitting/receiving systems having different passbands, comprising
a diplexer circuit comprising a low-pass filter and a high-pass filter; -
a first switch circuit connected to said low-pass filter and comprising pin-junction diodes, transmission lines and at least one capacitor for switching a transmitting line and a receiving line; a second switch circuit connected to said high-pass filter and comprising pin-junction diodes, transmission lines and at least one capacitor for switching a transmitting line and a receiving line; a third switch circuit comprising FET switches connected to said first switch circuit for switching said receiving line from said first switch circuit; and a fourth switch circuit comprising FET switches connected to said second switch circuit for switching said receiving line from said second switch circuit, wherein said third and fourth switch circuits share a control power terminal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An antenna switch module connected to a common antenna for switching the connection of said antenna to a transmission circuit or a receiving circuit in plural transmitting/receiving systems having different passbands, comprising
a diplexer circuit comprising a low-pass filler and a high-pass filler each constituted by an LC circuit; -
a first switch circuit connected to said low-pass filter and comprising pin-junction diodes and transmission lines for switching a transmitting line and a receiving line, a second switch circuit connected to said high-pass filter and comprising pin-junction diodes and transmission lines for switching a transmitting line and a receiving line; a third switch circuit comprising FET switches connected to said first switch circuit for switching said receiving line from said first switch circuit; and a fourth switch circuit comprising FET switches connected to said second switch circuit for switching said receiving line from said second switch circuit; at least part of transmission lines constituting said LC circuits in said diplexer circuit and said first and second switch circuits being electrode patterns formed in a multilayer substrate constituted by plural dielectric layers; and
chip elements constituting part of said LC circuits, diode elements constituting said first and second switch circuits, and FET switches constituting said third and fourth switch circuits being mounted onto said multilayer substrates,wherein FET switches constituting said third switch circuit and/or said fourth switch circuit overlap at least part of electrode patterns constituting said transmission lines on the side of the receiving line of said first or second switch circuit, when said multilayer substrate is viewed from above its mount surface in a lamination direction. - View Dependent Claims (8, 9, 10, 11)
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Specification