Directional coupler
A directional coupler and coupling end technology, applied in waveguide-type devices, electrical components, connecting devices, etc., can solve the problems of high manufacturing cost, low coupling coefficient, complex structure, etc., and achieve improved performance, simple device structure, and low implementation cost. Effect
Active Publication Date: 2019-05-28
RDA MICROELECTRONICS SHANGHAICO LTD
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Problems solved by technology
The disadvantage of this solution is: only the planar coupling between the main signal line and the coupling signal line, the coupling coefficient is still low
The disadvantage of this solution is that at least two conductor layers need to be used, and the first line and the second line are arranged on the two conductor layers, and the lines of the two conductor layers are also required to correspond to each other in the vertical direction
The structure of this coupler is very complicated and the manufacturing cost is high
Method used
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Embodiment 2
[0044] The difference between the second embodiment and the first embodiment mainly depends on the limit processing capacity of the semiconductor manufacturing plant, especially the areas of the via electrodes 41 to 44 . If the diameter of the via electrode can be reduced to S, then SS=S in Embodiment 2, which is the optimal situation. If the diameter of the through-hole electrode is greater than S, then SS>S in the second embodiment, that is, the open section lines 31 and 32 become straight lines by increasing the row spacing.
[0045] see Figure 9 , which is the third embodiment of the directional coupler provided by this application. The difference between the third embodiment and the second embodiment is that the two open-circuit stubs 31 and 32 in the second embodiment are both connected to the coupling signal line 20 near the terminal (coupling end P3 and isolation end P4) of the coupling signal line 20 . The two open stub lines 31 and 32 in the third embodiment are ...
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The invention discloses a directional coupler. A main signal line comprises a main signal line first segment and a main signal line second segment which are electrically isolated on a first conductorlayer. A coupling signal line is a transmission line on the first conductor layer and is positioned between the main signal line first segment and the main signal line second segment; at least a portion of the coupling signal line is adjacent and substantially parallel to at least a portion of the main signal line first segment and at least a portion of the main signal line second segment. An open-circuit cut line comprises an open-circuit cut line I and an open-circuit cut line II on the first conductor layer; at least a portion of each of the two open-circuit cut lines is adjacent to and substantially parallel to at least a portion of each of the two main signal lines. A through hole electrode is electrically connected with the main signal line on the first conductor layer and a connecting line on a second conductor layer. The connecting line is arranged on the second conductor layer and is used for electrically connecting the main signal line first segment and the main signal line second segment on the first conductor layer. The directional coupler has the advantages of being large in coupling coefficient and small in area.
Description
technical field [0001] The present application relates to a radio frequency device, in particular to a directional coupler. Background technique [0002] A directional coupler is an electronic device typically used in the radio frequency field. A common type of directional coupler consists of two coupled transmission lines (transmission lines), which are close enough that when energy passes in one transmission line, it will be coupled to the other transmission line. [0003] In the field of mobile communication, a mobile terminal typically represented by a mobile phone usually has a directional coupler, for example, to perform outer loop power control in the communication between the mobile terminal and the base station. Usually, the performance index of the directional coupler in the mobile terminal is required to be that the absolute value of the coupling factor (coupling factor) is ≥ 20dB, the directivity (directivity) is ≥ 20dB, and the standing wave ratio (standing wav...
Claims
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IPC IPC(8): H01P5/18
Inventor 刘苗王成碧黎宝龙贾斌
Owner RDA MICROELECTRONICS SHANGHAICO LTD