For the system noise temperature calibration of the K/Q/W triple-band cryogenic receiver on Tianma Radio Telescope (TMRT), a design of W-band eight-hole waveguide directional coupler is proposed in ...

Abstract: We propose a lithium-niobate optical waveguide asymmetric directional coupler for the realization of an electro-optically switchable mode (de)multiplexer. Our typical fabricated coupler, ...

Abstract: A technique for multiplexing degenerate modes in circular multimode fibers using the structure directional coupler pair is presented. The same device can be used for demultiplexing of ...

This essential measurement accessory for microwaves has morphed from waveguides down to tiny surface-mount components. Part 1 examines the need for and basic principles of directional couplers and ...

Analyzing different directional coupler types in terms of performance tradeoffs can simplify the specification process when choosing a coupler for a particular application. As last month's Part 1 of ...

Directional couplers are an important part of analog signal processing in microwave systems, including as portions of power dividers and combiners, in directional filters, attenuators, phase shifters, ...

Integration of RF power, RF small, digital, DC and supervision circuits is still one of the main goals of modern radar, satellite and wireless communications technology. Today’s solutions of ...

This essential measurement accessory for microwaves has morphed from waveguides down to tiny surface-mount components. Engineers who work with circuits typically use a multimeter as their primary test ...

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