Miniature directional coupling device
a coupling device and miniature technology, applied in coupling devices, waveguide type devices, basic electric elements, etc., can solve the problems of not meeting the signal transmission requirement, 1/b>/b>cannot meet the requirements of signal transmission, and 1/b>/b>/b>/b>/b>/b>/b>/b>/b>/b>/b>/b>/b>/
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first embodiment
[0046]With reference to FIG. 4, which illustrates an equivalent circuit diagram of a first embodiment of a miniature directional coupling device according to the present invention. Moreover, please simultaneously refer to FIG. 5A, FIG. 5B and FIG. 5C, where stereo diagrams of the first embodiment of the miniature directional coupling device are provided. As the related drawings show, the miniature directional coupling device 1 roposed by the present invention comprises: a main body 11, an input electrode 12, a first ground electrode 13, an output electrode 14, an isolated electrode 15, a second ground electrode 16, and a coupled electrode 17.
[0047]From FIG. 4, it can know that the main body 11 is provided with a first directional coupler DP1, a second directional coupler DP2 and at least one phase retarder PD in the internal thereof, wherein the first directional coupler DP1 comprises a first main line 1171 and a coupled line 1166, and has an input port DP11 and a coupled port DP12....
second embodiment
[0057]With reference to FIG. 8, which illustrates an equivalent circuit diagram of a second embodiment for the miniature directional coupling device. Moreover, please simultaneously refer to FIG. 9, which shows an exploded view of the main body of the miniature directional coupling device. In the second embodiment, the first directional coupler DPI comprises a first main line 1171 and a first coupled line 1166, and has an input port DP11 and a coupled port DP12. Moreover, the second directional coupler DP2 comprises a second main line 1174 and a second coupled line 1164, and has an output port DP21 and an isolated port DP22. From FIG. 8, it can find that the first main line 1171 is connected to the second main line 1174, and the second coupled line 1164 is electrically connected to the firs coupled line 1166 through a phase retarder PD. Moreover, after comparing FIG. 8 with FIG. 4, the engineers skilled in microwave engineering can find out the difference between the second embodime...
third embodiment
[0059]Furthermore, a third embodiment for the miniature directional coupling device 1 continuously proposed in following paragraphs. Please refer to FIG. 11, which shows a first equivalent circuit diagram of the third embodiment for the miniature directional coupling device. As FIG. 11 shows, a first L matching network L-MN1 is disposed between the phase retarder PD and the first coupled line 1166, and a second L matching network L-MN2 is disposed between the phase retarder PD and the second coupled line 1164. Please refer to FIG. 12, which shows a second equivalent circuit diagram of the third embodiment for the miniature directional coupling device. As FIG. 12 shows, a first matching network π-MN1 is disposed between the phase retarder PD and the first coupled line 1166, and a second π matching network π-MN2 is disposed between the phase retarder PD and the second coupled line 1164.
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