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Coupler circuit

A coupler and circuit technology, applied in the field of coupler circuits, can solve problems such as large layout area, and achieve the effect of solving large layout area, reducing layout area, and reducing transmission line area

Inactive Publication Date: 2018-12-04
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] An embodiment of the present invention provides a coupler circuit to at least solve the problem of large layout area in the existing coupler circuit

Method used

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  • Coupler circuit
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Examples

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no. 1 example

[0015] figure 1 The schematic structural diagram of the coupler circuit provided for the first embodiment of the present invention is represented by figure 1 It can be seen that the coupler circuit provided in this embodiment includes: a plurality of transmission lines 11 for forming a loop, a signal terminal 12 connected to the transmission lines, and a bypass admittance network 13 connected to the transmission line, the bypass admittance network 13 and The transmission line 11 forms a local unit, and the electrical parameters of the local unit are equivalent to the target electrical parameters of the coupler circuit 1 .

[0016] In practical applications, the transmission line can be realized in many ways, preferably, such as image 3 As shown, in some embodiments, the transmission line 11 in the above embodiments is a microstrip line.

[0017] In some embodiments, the signal terminals in the above embodiments are connected to connection nodes of adjacent transmission line...

no. 2 example

[0028] This embodiment provides a novel coupler circuit with a bypass admittance network loading structure, thereby realizing the miniaturization and performance optimization of the microstrip directional coupler.

[0029] Existing coupler circuits such as figure 2 As shown, the impedance of the main line is 50 ohms, and the impedance of the branch lines is 35.35 ohms. When the signal is input from port 1, the signal is output from ports 2 and 3 with equal power, and port 4 has no output in theory and is an isolated end. The length of the main line and the branch line is λ / 4 (λ is the central phase wavelength). Assuming that the signal is input from port 1, the signal voltage to port 4 is composed of two components, one is routed from A to C, the other is routed from A to B, D to C, and the phase difference between the two routes is 180 degrees. As long as the amplitude of the two voltages is required Equal can ensure that port 4 has no output power. The two voltage compon...

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Abstract

The invention provides a coupler circuit. The circuit comprises a signal terminal, a transmission line and a bypass admittance network, the bypass admittance network and the transmission line form a local unit, and an electrical parameter of the local unit and a target electrical parameter of the coupler circuit are equivalent. According to the circuit, compared with the mode for achieving the same electrical parameter by only providing the transmission line, the area of the transmission line (mainly represented in length) is greatly reduced, the overall layout area of the coupler circuit canbe further reduced, and the problem of large layout area of the conventional coupler circuit is solved.

Description

technical field [0001] The invention relates to the communication field, in particular to a coupler circuit. Background technique [0002] With the development of communication technology, the miniaturization of wireless products has become a trend, and the cost factor has also become the main concern factor of product competitiveness. The microstrip directional coupler has an absolute cost advantage compared with the ceramic devices mainly used at this stage, and the index consistency is good. However, the existing microstrip directional coupler has at least this disadvantage: the bandwidth of the directional coupler is narrow , for high-frequency circuits, the length of the quarter-wavelength line in this frequency band is too long, resulting in a large footprint for the overall layout of the coupler. Contents of the invention [0003] An embodiment of the present invention provides a coupler circuit to at least solve the problem of large layout area in the existing cou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P5/18
CPCH01P5/184
Inventor 陈平
Owner ZTE CORP