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Related Concept Videos

Design Example01:23

Design Example

354
The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
354
Design Example: Vintage Mixing Console01:17

Design Example: Vintage Mixing Console

269
A sound engineer at a music company recently encountered a problem. The output from their newly acquired studio's vintage mixing console was too low for the requirements of modern recording equipment. To rectify this situation, the engineer decided to design an audio pre-amplifier using an operational amplifier (op-amp) to boost the signal level.
The specifications for the pre-amplifier were clear. It needed to amplify the audio signal by a factor of 10, have an input impedance above 10...
269

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20 dB improvement utilizing custom-designed 3D-printed terahertz horn coupler.

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    |January 6, 2023
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    Summary

    We developed a rapid, low-cost method for designing and 3D printing terahertz horn couplers. This significantly improves signal transmission in terahertz wireless communication systems.

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    Area of Science:

    • Optics and Photonics
    • Wireless Communications
    • Materials Science

    Background:

    • Terahertz (THz) frequencies offer higher capacity and lower latency for wireless communications compared to microwaves.
    • Challenges exist in efficiently coupling THz waves between free space and planar air-core waveguides.
    • Existing coupling methods can be inefficient and costly.

    Purpose of the Study:

    • To propose a framework for rapid design and low-cost fabrication of THz horn couplers.
    • To enhance the coupling efficiency for THz wireless communication systems.
    • To provide an economical and customizable solution for THz waveguide integration.

    Main Methods:

    • Horn couplers designed by maximizing field overlap integral at interfaces.
    • Fabrication via 3D printing technique.
    • Sputtering with a thin gold layer for conductivity.
    • Characterization of surface roughness (28 μm standard deviation).

    Main Results:

    • Experimental demonstration of improved transmittance by 20 dB compared to pinhole couplers.
    • Achieved a cost of only 5% of commercially available counterparts.
    • Validated the effectiveness of the 3D printing and gold sputtering method.

    Conclusions:

    • The proposed framework offers a fast, convenient, and economical approach for fabricating customized THz horn couplers.
    • This method significantly enhances signal transmittance in THz waveguide systems.
    • The technique is suitable for integration into 3D-printed THz devices.