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high frequency directional coupler

High frequency directional couplers that couple via a slot-type design are the subject of the current invention. A slot with a rectangular aperture that is configured to pass a waveguide through it is known as a slot-type setup. The capacity to give a directional connection in both the forward and backward directions, as well as the flexibility to be modified to a desired form or size, are the two key characteristics of this arrangement.


Specific-illustrative embodiments of the present invention

In one specific-illustrative embodiment of the present invention for a high power directional coupler, an identification signal is embedded in an input data signal. A scaled noise signal is also embedded in the input data signal. This composite signal is then added to the original signal to form a distributable signal. The scaling factor is set through a scale control device 226, and may take many forms. In the first embodiment, N is usually eight. However, it is possible to use more than eight bits. For example, 16 bits can be allocated to the most significant bits of an audio signal.

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Increasing the frequency range of directivity

There is an ever increasing need for directional couplers with high coupling efficiency, low noise, and high power transfer capability. This article presents a novel family of intracavity couplers that have important applications in integrated optics circuits. The optical RF Triplexer is a good example of the aforementioned. It uses a silica-on-silicon substrate to separate downstream optical signals. Its features are a linear butterfly concept, a subwavelength index-matching region, and an exemplary cross-coupling. Its efficiency was measured to be -1.3aEUR%0aEUR%0dB. In addition, it was optimized using the beam propagation method. A more conventional grating coupler concept exploits shallow etch trenches in fiber chips. The resulting subwavelength index-matching region reduces the reflectivity at the interface between the waveguides. As a result, it has a higher coupling efficiency than conventional grating couplers.

Coupling loss in the forward direction

A helpful tool for RF system designers is the directional coupler 7dB. It offers feedback on variations in load during operation and enables accurate monitoring of the RF energy flow. Two RF transformers are used in typical directional coupler systems. Both the input and output ports of the RF transformers are utilized. An additional inductor could be employed in addition to the RF transmission lines. This inductor generates both forward and backward power signals and may be linked in a shunt with the RF line. Different applications might make use of directional couplers. They are appropriate, for instance, for a tap in a cable distribution system. They are also employed in metering and power leveling applications.

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