Analysis and design of a linear array of electromagnetically coupled microstrip patches

Analysis and design procedures are presented for an array of patches that are coupled electromagnetically by means of microstrip line sections embedded within the substrate. Such an array has a simple feed mechanism, with only the first and last patches fed actively or terminated with a load. In the design procedure the geometry of the embedded line sections is determined in order to excite a specified set of patch currents and produce a specified pattern. A four-element array having a uniform amplitude taper and a 45 degrees beam was designed and built.<>