Design of Wideband Waveguide Hybrid With Ultra-Low Amplitude Imbalance
| Autor: | Vincent Desmaris, Hawal Rashid, Marcel Ruf, Andreas Henkel, Victor Belitsky, Thilo Bednorz |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Physics
Radiation Fabrication Terahertz radiation business.industry Ripple 020206 networking & telecommunications 02 engineering and technology 021001 nanoscience & nanotechnology law.invention Wavelength Amplitude Optics law 0202 electrical engineering electronic engineering information engineering Power dividers and directional couplers Electrical and Electronic Engineering Wideband 0210 nano-technology business Waveguide |
| Zdroj: | IEEE Transactions on Terahertz Science and Technology. 6:83-90 |
| ISSN: | 2156-3446 2156-342X |
| Popis: | We present a design and synthesis procedure for a new 90 ° waveguide hybrid with ultra-low amplitude imbalance. This novel hybrid design is based on Reed's multiple branch waveguide hybrid. The primary feature of this quadrature hybrid design is the introduction of a controllable ripple in the operational band by, firstly changing the heights of the input and output branches and, secondly, by introducing three waveguide-height discontinuity sections placed symmetrically in the main waveguide. This layout allows ultra-low amplitude imbalance over a wide operational band. At the same time, it permits a greater input/output branch height as compared to the Reed's 5-branch waveguide hybrid, which should ease fabrication for short-mm and sub-mm wavelengths. This design concept is demonstrated through a 90 ° waveguide hybrid for the 159-216 GHz band (30% fractional bandwidth). Our simulations indicate that the amplitude imbalance of the hybrid is better than 0.2 dB over the most of the 159-216 GHz band with a phase imbalance better than ±4°. Experimental verification of the hybrid shows excellent agreement with the simulations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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