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The power transmitted in the main line is coupled to the secondary line through a variety of ways, and interferes with each other and only transmits in one direction in the secondary line.
Figure 1 shows three typical coupling structures of rectangular waveguide directional couplers. a is the two-hole coupling separated by 1/4 guide wavelength; b is the double series branch line coupling with the spacing and length equal to 1/4 guide wavelength; c is the continuous coupling of TE and TE propagation modes in the crack area. Take the two structures of a and b as examples. After the signal input from port ① is coupled to the secondary line in two ways, it is superimposed in phase due to the same stroke in the direction of port ④, and there is output; in the direction of ③, the stroke differs by 1/2 guide wavelength The reverse phase cancellation is isolated without output.
Figure 2 shows two typical coupling structures of the microstrip directional coupler. A is the dual parallel branch line coupling with the pitch and length equal to 1/4 of the lead wavelength, and b is the continuous coupling of the electric and magnetic fields in the parallel region. Taking the structure of b as an example, the signal input from port ① is coupled to the two ports of the secondary line by electric field to generate in-phase induced voltage, and magnetic field coupling generates reverse-phase induced voltage. The result is added at port ④ and there is output, and at ③, it is cancelled and there is no output in isolation.
In addition, it can also form a directional coupler for other transmission lines (Figure 3).
Figure 1
Figure 2
Figure 3
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2007
Total Annual:
400-500
Employee Number:
20~50
Ecer Certification：
Active Member
Chengdu Sinoscite Technology Co., Ltd. is an international advocate of innovation in microwave and millimeter wave fields. The company has long been dedicated to the professional design, production and sales of high-end microwave and millimeter wave devices and systems.
Chengdu Sinoscite Technology Co., Ltd. is an international advocate of innovation in microwave and millimeter wave fields. The company has long been dedicated to the professional design, production and sales of high-end microwave and millimeter wave devices and systems.
