[asac] [almanews] ALMA Memo 381 Released

[Carolyn White]

ALMA Memo No. 381

Elements for E-Plane Split-Block Waveguide Circuits

A. R. Kerr

2001-Jul-05

E-plane split-block waveguide construction is well suited to many
millimeter-wave components, including power dividers, frequency
multipliers, and single-ended, balanced and sideband-separating mixers.
Recent ALMA memos have described quadrature hybrids and a matched power
divider suitable for split-block construction.  This memo describes four
additional waveguide elements which can be used as building blocks in more
complex circuits: a compact H-plane bend, a short E-plane bend, a matched
E-plane Y-junction, and a broadband transducer from full- height waveguide
to quartz suspended stripline.  The components are suitable for
fabrication on a CNC milling machine using an end-mill of diameter equal
to the waveguide height, and do not require the insertion of separate
waveguide short-circuit pieces at the ends of waveguides.  Prototype
designs are given for WR-10 waveguide (75- 110 GHz), which can be scaled
for any other waveguide size with the same 2:1 aspect ratio.

View a PDF version of ALMA Memo #381.
     http://www.alma.nrao.edu/memos/html-memos/alma381/memo381.pdf

Download a postscript version of ALMA Memo #381.
     http://www.alma.nrao.edu/memos/html-memos/alma381/memo381.ps

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