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Abstract
This letter reports on the first Schottky diode frequency doubler with a split-block waveguide structure fabricated by a high-precision stereolithography (SLA) printing process. The printed polymer waveguide parts were plated with copper and a thin protective layer of gold. The surface roughness of the printed waveguide parts has been characterized and the critical dimensions measured, revealing good printing quality as well as a dimensional accuracy that meets the tight tolerance requirements for sub-terahertz active devices. The 62.5 GHz to 125 GHz frequency doubler circuit comprises a 20 m thick GaAs Schottky diode monolithic microwave integrated circuit (MMIC) in the waveguide. The measured doubler provides a maximum output power of 33 mW at 126 GHz for input power of 100 mW. The peak conversion efficiency was about 32% at input powers from 80 to 110 mW. This doubler performance is compared with and found to be nearly identical to the same MMIC housed in a CNC-machined metal package. This work demonstrates the capability of high-precision SLA techniques for producing sub-terahertz waveguide components.
Original language | English |
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Journal | IEEE Transactions on Terahertz Science and Technology |
Early online date | 1 Dec 2021 |
DOIs | |
Publication status | E-pub ahead of print - 1 Dec 2021 |
Bibliographical note
Publisher Copyright:IEEE
Keywords
- 3D printing
- Electromagnetic waveguides
- frequency doubler
- Microwave filters
- millimeterwave
- MMIC
- Optical waveguides
- Power generation
- Rough surfaces
- Schottky diode
- Schottky diodes
- Stereolithography
- Surface roughness
- waveguide
ASJC Scopus subject areas
- Radiation
- Electrical and Electronic Engineering
Fingerprint
Dive into the research topics of '125 GHz frequency doubler using a waveguide cavity produced by stereolithography'. Together they form a unique fingerprint.Projects
- 1 Finished
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Towards a 3D Printed Terahertz Circuit Technology
Wang, Y. (Co-Investigator) & Lancaster, M. (Principal Investigator)
Engineering & Physical Science Research Council
1/07/19 → 30/04/23
Project: Research Councils
Activities
- 1 Collaboration
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Boston Micro Fabrication (BMF)
Wang, Y. (Advisor)
Apr 2022 → …Activity: Collaboration with an external institution or individual › Collaboration