Antenna-Filter as a New Look at the Microwave Part of the Radio Path

Antenna-filter implements the functions of combining filters and antennas into one structure with the exclusive goal of decreasing size and loss in radio system design and increasing bandwidth. An extensive overview of the several types of AF design methodologies is given in this treatise. The main approaches in the development of AF are the use of multilayer structures and mutual connection through various types of slots. The article compares the effectiveness of different methods for developing AF in terms of overall dimensions, operating frequency band and, complexity and cost of manufacturing. The authors believe that this review article will be useful for the developers of the microwave part of the radio paths of modern radio-electronic equipment.