Design, analysis and simualtion of a C band frequency scanning slot-array antenna

Abstract

A frequency scanning waveguide slot-array antenna has been designed and simulated. The antenna has 24 radiating elements and has been designed to work in the 6.6-6.9GHz frequency band. The slot width is taken about 4mm and for the convenience of the mechanical fabrication of the antenna, the dumbbell shaped slots has been used. The beam width of the antenna is about 5-6 degrees. The main lobe direction is about 90 degrees at the start of the frequency band namely 6.6GHz and the main lobe rotates about 5 degrees for every 50MHz change in the input frequency. The software CST Microwave Studio has been used to simulate the behavior of the antenna. The antenna has a simple mechanical structure which leads to a simple fabrication process.

High gain frequency scanning antenna using dumbbell‐shaped inclined slots and parallel plate waveguide polariser

“…The beam direction of the proposed antenna can be controlled at a given frequency according to the following equation [23,27]:…”

“…Various types of wave guiding structures in combination with slot arrays have been used in the design of FSAs such as the rectangular waveguide [13,14], parallel-plate waveguide (PPW) [15] and substrate-integrated waveguide (SIW) [16].…”

Low‐loss frequency scanning planar array with hybrid feeding structure for low‐altitude detection radar

“…In this paper, a low‐loss frequency scanning planar array with hybrid feeding structure in Ku‐band has been designed and simulated. The sub‐array structure was used to reduce the input return loss of the slow‐wave line, and the hybrid coupling [16–19] was applied in the frequency scanning planar array to achieve the large scanning range and high gain. In Section 2, the sub‐array structure and double‐layer microstrip patch will be introduced, and the required characteristics will also be presented.…”

New broad angle frequency scanning antenna with narrow bandwidth based on a CRLH structure

“…Unfortunately, high dispersion is usually accompanied with higher dissipation losses. This is the case in FSAs based on meander line feed networks in which losses are increased by the necessity to use long segments of waveguides between the radiating elements [10][11][12]. For leaky-wave antennas based on fast wave propagation, a large bandwidth is needed to scan over a wide angular sector.…”