Waveguide mode converter and method using same

Patent · Mon Jan 01 04:00:00 EST 1990

OSTI ID:867524

Moeller, Charles P ^[1]

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1. Del Mar, CA

A waveguide mode converter converts electromagnetic power being transmitted in a TE.sub.0n or a TM.sub.0n mode, where n is an integer, to an HE.sub.11 mode. The conversion process occurs in a single stage without requiring the power to pass through any intermediate modes. The converter comprises a length of circular corrugated waveguide formed in a multiperiod periodic curve. The period of the curve is selected to couple the desired modes and decouple undesired modes. The corrugation depth is selected to control the phase propagation constant, or wavenumbers, of the input and output modes, thereby preventing coherent coupling to competing modes. In one embodiment, both the period and amplitude of the curve may be selectively adjusted, thereby allowing the converter to be tuned to maximize the conversion efficiency.

• Research Organization: CALIFORNIA INSTITUTE OF TECH
• DOE Contract Number: AC03-84ER51044
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4956620
• OSTI ID: 867524
• Country of Publication: United States
• Language: English

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0n
11
adjusted
allowing
amplitude
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coherent
competing
comprises
constant
control
conversion
conversion efficiency
conversion process
converter
converter comprises
converter converts
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corrugated
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depth
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electromagnetic
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input
integer
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method
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modes
multiperiod
occurs
output
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period
periodic
phase
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process occurs
propagation
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requiring
selected
selectively
selectively adjusted
single
single stage
stage
tm
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tuned
undesired
waveguide
waveguide formed
waveguide mode
wavenumbers