Unlock instant, AI-driven research and patent intelligence for your innovation.

RF Multiplexer

A multiplexer and radio frequency technology, applied in transmission systems, electrical components, etc., can solve problems such as high insertion loss

Active Publication Date: 2019-12-31
TELEFON AB LM ERICSSON (PUBL)
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, this also results in an additional insertion loss of about 0.1 to 0.3 dB in the receive path from port 1 to port 7 for the receive signal RX around frequency F1
Further, since the dual-band BPF has a higher insertion loss than the single-band BPF, the figure 2 Multiplexer configurations with high insertion loss

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • RF Multiplexer
  • RF Multiplexer
  • RF Multiplexer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] Before describing in detail exemplary embodiments in accordance with the present disclosure, it is noted that the embodiments reside primarily in combinations of apparatus components and processing steps related to multiplexing transmit and receive signals and to multiplexing received signals in a radio to filter. Accordingly, system and method components have been represented, where appropriate, by conventional symbols in the drawings, which show only those specific details that are relevant to an understanding of the embodiments of the present disclosure, so as not to benefit from the description herein One of ordinary skill in the art would easily obscure the disclosure with obvious details.

[0030] As used herein, relative terms such as "first" and "second", "top" and "bottom", etc. may only be used to distinguish one entity or element from another entity or element, and are not necessarily No physical or logical relationship or order between such entities or elem...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A method and apparatus for routing transmit and receive signals in a radio RF front end. According to one aspect, the disclosure provides a multiplexer method and apparatus for routing transmit signals to an antenna and routing amplified receive signals to a receiver. The multiplexer includes a first hybrid coupler having a first frequency response and at least one other hybrid coupler having a second frequency response. The at least one other hybrid coupler is coupled to the first hybrid coupler by a first and second splitters each cascaded with a set of amplifying circuits for balanced amplification. In some embodiments, the second frequency response complements the first frequency response to increase cancellation of two signals arriving at an output port of the at least one other hybrid coupler from two different paths through the first and the at least one other hybrid couplers.

Description

technical field [0001] The present disclosure relates to radio transceivers, and more particularly to multiplexing transmitted and received signals, and filtering received signals. Background technique [0002] Antennas for radio base stations are physically large compared to other radio components, but typically have a relatively wide bandwidth. Therefore, it is preferable to cause a plurality of transmit (TX) bands and receive (RX) bands to share an antenna so that the number of antennas can be minimized. [0003] To share antennas, multiplexers (or duplexers for single-band transmit and receive applications) are typically used. figure 1 A conventional 2-band duplexer 18 in radio frequency (RF) front end 10 is shown, which couples transmit and receive signals to antenna 12 . The transmitted and received signals are passed through respective filters 14 , 16 . For high power base stations, an air cavity filter with low passive intermodulation (PIM) can be used to implemen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/525
CPCH04B1/525
Inventor 简春云S·塞查勒恩刘伟
Owner TELEFON AB LM ERICSSON (PUBL)