Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Directional coupler

一种定向耦合器、耦合端口的技术，应用在波导型器件、电气元件、连接装置等方向，达到抑制耦合度的变化、减少信号反射、简单结构的效果

Active Publication Date: 2015-09-16
TDK CORPARATION
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this directional coupler requires two low-pass filters and two terminating resistors, so the size of the directional coupler increases.

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
  • Directional coupler
  • Directional coupler
  • Directional coupler

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0049] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. First, refer to figure 1 Furthermore, the circuit configuration of the directional coupler according to the first embodiment of the present invention will be described below. Such as figure 1 As shown, the directional coupler 1 according to this embodiment includes an input port 11 , an output port 12 , a coupling port 13 , and a termination port 14 . The directional coupler 1 further includes a main line 10 connecting the input port 11 and the output port 12 , and a sub line 20 connecting the coupling port 13 and the terminal port 14 . The terminal port 14 is grounded via a terminal resistor 15 . That is, one end of the terminating resistor 15 is connected to the terminating port 14, and the other end of the terminating resistor 15 is connected to the ground. In this embodiment, the resistance value of the terminal resistor 15 is 50Ω.

...

no. 2 Embodiment approach

[0086] Next, refer to Figure 12 Furthermore, the directional coupler 1 according to the second embodiment of the present invention will be described below. Figure 12 It is a circuit diagram showing the circuit configuration of the directional coupler 1 according to this embodiment. In the directional coupler 1 according to this embodiment, the configuration of the low-pass filter 30 is different from that of the first embodiment.

[0087] The low-pass filter 30 according to the present embodiment has the first path 31, the second path 32, and the second capacitor C2 similarly to the first embodiment. The first path 31 has a third end portion 31A connected to the second end portion 20A2 of the first coupling line portion 20A, a fourth end portion 31B on the opposite side, and a third end portion 31A and a fourth end portion provided at the third end portion 31A and the fourth end portion. at least 1 inductor between sections 31B. In the present embodiment, the first path 3...

no. 3 Embodiment approach

[0095] Next, refer to Figure 16 Furthermore, the directional coupler 1 according to the third embodiment of the present invention will be described below. Figure 16 It is a circuit diagram showing the circuit configuration of the directional coupler 1 according to this embodiment. In the directional coupler 1 according to the present embodiment, the sub-line 20 includes the first coupled line section 20A and the low-pass filter 30 , but does not include the second coupled line section 20B. In addition, in the directional coupler 1 according to the present embodiment, the main line 10 includes the first portion 10A, but does not include the second portion 10B. In addition, in the directional coupler 1 according to the present embodiment, the first coupling portion 40A is present, but the second coupling portion 40B is not present.

[0096] The configuration of the low-pass filter 30 according to this embodiment may be the same as that of the first embodiment or the same as ...

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 directional coupler includes a main line and a subline. The main line connects an input port and an output port. The subline connects a coupling port and a terminal port. The subline includes a first coupling line section connected to the terminal port, a second coupling line section connected to the coupling port, and a low-pass filter. The low-pass filter includes an inductor provided between the first and second coupling line sections, a first capacitor having an end connected to the connection point between the inductor and the second coupling line section, a resistor connecting the other end of the first capacitor to the ground, and a second capacitor connecting the connection point between the inductor and the first coupling line section to the ground.

Description

technical field [0001] The present invention relates to directional couplers that can be used over broadband. Background technique [0002] Directional couplers are used, for example, to detect the level of transmission and reception signals in transmission and reception circuits of radio communication equipment such as cellular phones and wireless LAN communication equipment. [0003] A directional coupler having a structure as described below is known as a conventional directional coupler. This directional coupler has an input port, an output port, a coupling port, a terminal port, a main line, and a sub line. One end of the main line is connected to the input port, and the other end of the main line is connected to the output port. One end of the secondary line is connected to the coupling port, and the other end of the secondary line is connected to the terminal port. The main line and the auxiliary line are electromagnetically coupled. The terminating port is ground...

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 Applications(China)
IPC IPC(8): H01P5/18
CPCH01P5/18H01P5/187
Inventor 大桥武三岳幸生
Owner TDK CORPARATION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com