Waveguide Couplers and Hybrids

A. R. Kerr and N. Horner, "A Split-Block Waveguide Directional Coupler," ALMA Memo 432, 26 Aug 2002.

S. Srikanth and A. R. Kerr, “Waveguide Quadrature Hybrids for ALMA Receivers,” ALMA Memo 343, 11 Jan 2001.

A.R. Kerr and N. Horner, "A Broadband In-Phase Waveguide Power Divider/Combiner," ALMA Memo 325, 10 Oct 2000.