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Multiplexer and frontend module comprising a multiplexer

A technology of multiplexer and circuit, applied in multi-terminal pair network, amplifier with semiconductor device/discharge tube, amplifier, etc., can solve the problem of difficult to establish large capacitance value

Pending Publication Date: 2020-10-27
RF360 EURO GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to build large capacitance values ​​in miniaturized front-end modules

Method used

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  • Multiplexer and frontend module comprising a multiplexer
  • Multiplexer and frontend module comprising a multiplexer
  • Multiplexer and frontend module comprising a multiplexer

Examples

Experimental program
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Embodiment Construction

[0063] figure 1 A basic configuration of a multiplexer circuit MC is shown. The multiplexer circuit MC has an input port IN, a common port CP and an output port OUT. The input port IN is provided to receive RF signals that should be transmitted as well as RF signals that should be received from the external circuit environment. An output port OUT is provided to submit the received RF signal to the external circuit environment of the corresponding mobile communication device. The common port CP is a port via which transmission signals are transmitted and reception signals are received. To this end, the common port CP may be connected to the antenna AN, eg via an antenna port (not shown). A signal path electrically connects the input port IN to the common port CP. In the signal path, a transmit filter TXF is connected. Between the input port IN and the transmit filter TXF, a receive filter notch circuit RFNC is arranged. It has been recognized that taking the corresponding...

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Abstract

A multiplexer circuit with good isolation characteristics and a compensated frequency characteristic at the transmission side is presented. The multiplexer circuit has a reception filter notch circuit(RFNC) active at a frequency within a passband of a reception filter (RXF) and coupled between an input port and a transmission filter (TXF).

Description

technical field [0001] The present invention relates to a multiplexer that can be used in a mobile communication system, and to a front-end module comprising such a multiplexer. Background technique [0002] In mobile communication devices, communication between different participants takes place by exchanging RF signals. A front end is that part of a corresponding communication device that receives signals to be transmitted from, and submits the received signals to, the external circuit environment of the communication device. For this purpose, the transmit signal propagates in the transmit signal path and the receive signal propagates in the receive signal path. To prevent the transmitted signal from corrupting the received signal, the corresponding signal paths must be isolated from each other, and the matrix element S2 of the transfer function 21 is a measure of this isolation. [0003] Additionally, a transmit signal is received from a power amplifier, and the receiv...

Claims

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Application Information

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IPC IPC(8): H03H7/46H03H7/01H03H9/54H04B1/00H04B1/525H03H9/70H03H9/64H03H9/72
CPCH03H7/01H03H7/463H03H7/468H03H9/542H03H9/6483H03H9/706H03H9/725H03H2007/013H04B1/005H04B1/525H04B1/18H04B1/0458H03H9/72H04B1/0475H04B1/1027H04B2001/0408H04B2001/1063H04L25/0278
Inventor R·海贾纳
Owner RF360 EURO GMBH