## 1 Introduction  
The antenna arrays technology has become an essential component of wireless applications [1; 2; 3; 4; 5; 6; 7; 8; 9; 10]. These new wireless applications require phased antenna systems to provide the radiation requirements. However, the phased antenna systems based on antenna array structures are certainly of high complexity to generate the expected radiation. Then, more architectures of phased antenna systems based on less complex antenna arrays are necessary to accomplish the required radiation and to reduce the number of control ports or active devices [11]. This is an open problem in the state of the art. There are several techniques cited in the literature to reduce the number of control ports (or phase shifters) in the design of phased antenna arrays. For example, these techniques consider the application of sub-arrays [11; 12; 13; 14; 15; 16; 17; 18; 19; 20; 21; 22] to simplify the complexity of the array system. Several architectures based on sub-arrays have been analyzed in the state of the art, providing reduced scanning ranges for the radiation features of the low side lobe level. Furthermore, the application of the technique based on coherently radiating periodic structures (CORPS) [23; 24; 25; 26; 27] has been important to set new design configurations to decrease the number of phase shifters in the phase antenna system. This technique based on CORPSs has been successfully applied to different structures of phased antenna arrays. These systems of CORPSs take advantage of the design configurations to generate the phase slope or phase plane necessary for beam-scanning. Architectures of complete antenna system have been provided by these previous works in the literature. Many design configurations have been proposed in the literature, but less complex antenna systems (and less expensive ones) are needed to fit the new wireless applications and satisfy the radiation requirements. Thus, this paper presents a design strategy using CORPSs for 2-D phased array systems of limited scanning. This design proposal utilizes a novel CORPSs network of four inputs and nine outputs with better operation features with respect to previous work [26]. The new 4 \(\times\) 9 feeding system incorporates crossovers and 2 \(\times\) 3 CORPSs networks [25] by ring-type dividers/combiners. The feeding system has been proposed to have a more stable transmission power, achieving better control of the output amplitude. This new 4 \(\times\) 9 structure incorporates different division and recombination nodes (ring type), reducing by 50% the number of the resistors used in the feeding system with respect to previous works. Furthermore, this new structure provides a better phase control and has a number of recombination nodes lower than conventional feeding systems, and therefore less losses by energy dissipation. This new 4 \(\times\) 9 CORPSs feeding network presents better features in the reflection and transmission coefficients. This is because the crossovers of the new structure have a better performance with respect to the previous 4 \(\times\) 9 feeding network. Therefore, new configurations of 2-D phased arrays are proposed in this paper using a novel feeding network for reducing the number of phased shifters. The use of CORPSs blocks is illustrated for 2-D phased arrays. Two new antenna systems for 2-D phased arrays are analyzed utilizing 4 \(\times\) 9 CORPSs blocks. These CORPSs feeding blocks are utilized in a smart way to feed planar antenna arrays by generating the phase plane and reducing the number of control ports. Interesting results are provided based on the experimental measurements and full-wave simulations. These results illustrate a great reduction of the active devices, providing a good design compromise in terms of the scanning range and side lobe level performance. Furthermore, the provided results illustrate a maximum reduction capability in the number of phase shifters of 81%, considering a scanning range of \(\pm\)30\({}^{\circ}\) in azimuth and \(\pm\)18\({}^{\circ}\) in elevation.