Abstract
A novel design of phased array antenna based on a Slotted Waveguide Antenna Array (SWAA) is introduced in this paper. The CST Microwave Studio simulation results show that the S‒parameters, the gain, the axial ratio, and the beamwidth of the proposed phased array antenna are affected by the value of the progressive phase shift. The simulated results of the proposed phased array antenna at different values of progressive phase demonstrate that the S‒parameters for almost all ports are less than ‒10 dB over at least 2% bandwidth, the simulated phased array antenna gain is above 17 dB in the frequency range from 9.5 GHz to 9.7 GHz, the range of frequencies over which the simulated Axial Ratio (AR) is below 3 dB is not fixed and varied according to the selected progressive phase, the simulated beamwidth can be 6.5˚ or narrower based on the value of the progressive phase shift.
Highlights
The waveguides are used as a transmission line in case of high power and high frequency applications
The waveguides can work as an antenna if one end of the waveguide is opened to the space such as the horn antenna or if the walls of the waveguide have half-wavelength slots as the Slotted Waveguide Antenna Array (SWAA)
A proposed phased array antenna which consists of twelve slotted waveguide antenna elements is designed and simulated
Summary
The waveguides are used as a transmission line in case of high power and high frequency applications. The Slotted Waveguide Antenna Array (SWAA) offers many advantages such as high power handling capacity, low loss, can be used for tough environment conditions because of its metal structure, and radiation characteristics, they have found many applications especially in radar systems. The performance of the wireless communication systems can be improved by implementing the phased array antennas, these phased array antennas can steer the radiation pattern beam to the desired direction. This contributes to decreasing the interference and increasing the coverage distance of the wireless systems. The circularly polarized SWAA which is proposed in this paper can provide about 50 % reduction in the size of the antenna array as compared to similar designs in [2,3].
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