An Innovative Way of Using Coherently Radiating Periodic Structures for Phased Arrays With Reduced Number of Phase Shifters

A New Scheme of Applying CORPS and Crossovers to Reduce the Number of Phase Shifters in Antenna Arrays

“…The feeding network systems based on CORPS have been introduced previously in [ 20 , 21 , 22 , 23 ]. The CORPS networks consist of the iteration of recombination and split nodes [ 23 ].…”

“…An interesting property of the CORPS networks was studied in [ 21 , 22 ]. This property considers that if 2 signals are fed to a CORPS network of 2 × 3, as shown in Figure 2 , the phase average of the two signals is obtained at the output of the recombination node.…”

“…This property considers that if 2 signals are fed to a CORPS network of 2 × 3, as shown in Figure 2 , the phase average of the two signals is obtained at the output of the recombination node. This property is useful to generate the desirable progressive phase for linear antenna array configurations [ 21 ].…”

“…There are several design methodologies in the literature for generating beam-forming networks. There is an interesting study line from the traditional (or classical) networks such as the butler matrix [ 3 ], Blass [ 4 ], and Nolen [ 5 ] to the most recent feeding networks for reducing the number of active devices including the application of subarrays [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ], overlapping techniques [ 14 , 15 , 16 , 17 , 18 ], interleaving schemes [ 19 ] and CORPS (coherently radiating periodic structures) networks [ 20 , 21 , 22 , 23 ].…”

“…It has been demonstrated recently that the CORPS technique reduces the number of phase shifters for linear [ 21 ] and planar [ 22 ] antenna arrays. Although these configurations of the previous work provide an interesting way of applying CORPS considering the cophasal excitation required for beam-scanning, the application of CORPS for reducing the number of phase shifters in the beam-forming network is really scarce in the literature.…”