Design of a single-period 8.6 Ghz Tm01-Te11 serpentine mode converter and Tm01 and Te11 bends in a moderately overmoded circular waveguide

G. H. Luo

doi:10.1117/12.2301544

1 December 1990 Design of a single-period 8.6 Ghz TM₀₁-TE₁₁ serpentine mode converter and TM₀₁ and TE₁₁ bends in a moderately overmoded circular waveguide

G. H. Luo

Author Affiliations +

Proceedings Volume 1514, 15th International Conference on Infrared and Millimeter Waves; 15143Q (1990) https://doi.org/10.1117/12.2301544
Event: 15th International Conference on Infrared and Millimeter Waves, 1990, Orlando, FL, United States

Abstract

Certain high-power microwave tubes currently under development have their output in the TM₀₁ mode in a circular waveguide. This mode has a transverse electric field in the waveguide which is completely radial and produces an open-end radiation pattern which is entirely in the θ (the polar angle) direction with a null on the waveguide axis. This radiation pattern is not optimum for most applications and it is often desirable to convert the TM₀₁ mode into the TE₁₁ mode which has its maximum on the waveguide axis, is approximately linearly polarized, and has a higher maximum directivity than the TM₀₁ mode. In this paper, we discuss a TM₀₁ - TE₁₁ serpentine mode converter for a high-power backward wave oscillator operating at 8.6 GHz. Morgan’s method was used to derive the coupling coefficients and numerical computation to optimize the conversion efficiency. Test results are presented. Waveguide bends for TM₀₁ and TE₁₁ modes in an overmoded waveguide are also discussed.

Citation Download Citation

G. H. Luo "Design of a single-period 8.6 Ghz TM₀₁-TE₁₁ serpentine mode converter and TM₀₁ and TE₁₁ bends in a moderately overmoded circular waveguide", Proc. SPIE 1514, 15th International Conference on Infrared and Millimeter Waves, 15143Q (1 December 1990); https://doi.org/10.1117/12.2301544

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available