A method of designing photonic crystal grating slow-wave circuit for Ribbon--Beam microwave travelling wave amplifiers |
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Authors: | Yin Hai-Rong Gong Yu-Bin Wei Yan-Yu Gong Hua-Rong Yue Ling-N Lu Zhi-Gang Huang Min-Zhi and Wang Wen-Xiang |
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Institution: | School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610005, China |
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Abstract: | A method of designing a photonic crystal grating slow-wave circuit in which
the cylinders of the 2D photonic crystals dot on a cross-sectional plane is
established by calculating the band structures of the 2D photonic crystals,
and the eigenfrequency of the equivalent waveguide grating. For calculating
the band structures, the eigenvalue equations of the photonic crystals in
the system of photonic crystal grating slow-wave circuit are derived in a
special polarization mode. Two examples are taken to show the method. The
design result is validated by the scattering parameters of the same circuit.
The result indicates that there exists no photonic band gap if the metal
gratings do not extend into the photonic crystals; the design of the circuit
without the metal gratings extending into the photonic crystals is less
flexible than that with the metal gratings extending into the photonic
crystals. |
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Keywords: | TWTs photonic
crystals millimetre-wave THz slow-wave
circuit |
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