disclosed herein is a controlled reception pattern antenna that prevents the degradation of anti - jamming performance in a compact array antenna by increasing the antenna gain at a low elevation angle . the proposed antenna includes a radiator for receiving a satellite signal , a ground platform in which the radiator is arranged , and a radiating slot formed in the ground platform . by simply forming a radiating slot in the ground platform , antenna gain may be increased at a low elevation angle . therefore , it is possible to maintain anti - jamming performance and to reduce the size of the array antenna .