Abstract
The design of elliptically focused microwave bootlace lens is investigated and improved design is proposed. The proposed design of the lens is capable of scanning wide area and is compact in size than the other available designs. The phase error is calculated and compared with conventional design of bootlace lens. The results are obtained using Matlab coding and are in accordance to the theoretical values. This design is intended to be used in next generation cellular mobile communication with tilt of required angle at base stations and also it can be used as multiple beam-forming networks for avoiding deafness problem in the ad hoc networks with greater efficiency and saving radiated power.
Highlights
The growing demand of modern communication systems has increased the complexity of the systems for communication and surveillance
The directional antennas are used in ad hoc networks for better efficiency and throughput [6]; but switching between omnidirectional to directional antennas is the cause of concern and makes difficult to adjust power at output ports
The results shows that the phase error obtained for elliptically focused lens is less than the circular; and it will have better performance when used for multiple beamforming networks for antenna array
Summary
The growing demand of modern communication systems has increased the complexity of the systems for communication and surveillance. In radar and communication applications, it is necessary to have wide range coverage system These systems need generation of directional and multiple beams for scanning wide area with greater efficiency using antenna array. The Rotman or Bootlace lens is one of the microwave lenses used to scan beams electronically for true time delay scanning antennas [2]. This lens has low circuit complexity and allows real time scanning. The proposed design gives better efficiency and scanning capabilities Results of this design are compared with circular focused bootlace lens and are better than conventional design. The proposed bootlace lens is intended to be used as multibeamforming network in ad hoc networks to be done away with switching of antennas and eliminates deafness and hidden terminal problems with saving of power [7]
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