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Microstrip antennas and arrays. Part 2: New array-design technique

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2 Author(s)
James, J.R. ; Royal Military College of Science, Department of Electrical & Electronic Engineering, Swindon, UK ; Hall, P.S.

Open-circuit terminations on half-wavelength stubs form the radiating elements in a new design technique for linear microstrip microwave arrays. Measured results, on computer-designed resonant and wideband travelling-wave arrays with broadisde beams, demonstrate the technique; the effects of corporate feeds and radomes are also considered. The computer design of medium gain arrays, with H-plane sidelobe levels below about ¿¿21 dB, demands characterisation of the microstrip T-junction with an accuracy that is currently unavailabe, and the dimensional precision has to be obtained by experimental means. It is concluded, to date, that the known extraneous sources of radiation do not inhibit the control of H-plane sidelobes to a level of at least ¿¿25 dB and the new design technique makes microstrip arrays highly competitive with their conventional waveguide counterparts.

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Microwaves, Optics and Acoustics, IEE Journal on  (Volume:1 ,  Issue: 5 )