From: Theory and application of antenna arrays
by M. T. Ma
Senior Member of the Technical Staff
Institute for Telecommunications Sciences
Office of Telecommunications
U.S. Department of Commerce
Boulder, Colorado
and
Professor-Adjoint of Electrical Engineering
University of Colorado
6.2 Sloping Rhombic Antenna
Since the rhombic was first introduced by Bruce, (7,8) it has been extensively used for short-wave communications. The antenna consists of four straight wires of the same length l arranged in the form of a rhombus. It can be considered as an extension of the vee antenna studied in the previous section.
References:
7. Bruce, E, Developments in short-wave directive antennas, Proc. IRE, Vol. 19, No 8, pp. 1406-1433, August, 1931
8. Bruce, E., A.C. Beck, and L.R. Lowry. Horizontal rhombic antennas, Proc. IRE, Vol. 23, No. 1, pp. 24-46, January, 1935
The references also quote:
10. LaPort, E. A. and A.C. Veldhuis. Improved antennas of the rhombic class, RCA Rev., Vol. 21. No 1, pp.117-123, January, 1960
If anyone has access to these references, I would be most grateful for a copy, especially of reference 10.
I understand that Bruce hoped that the Rhombic would bear his name and that initially the antennas were called Diamond antennas.