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Criteria for nearly omnidirectional radiation patterns for printed antennas

1985; Institute of Electrical and Electronics Engineers; Volume: 33; Issue: 2 Linguagem: Inglês

10.1109/tap.1985.1143561

1558-3643

N.G. Alexopoulos, David R. Jackson, L.P.B. Katehi,

Microwave Engineering and Waveguides

Radiation from printed antennas is investigated with emphasis placed on producing \bar{E} - and \bar{H} -plane radiation patterns that are as nearly omnidirectional as possible. This is achieved using criteria which are derived for a nonzero radiation field extending down to the layer surface (radiation into the horizon). It is determined that this phenomenon arises when a surface wave pole coincides with a branch point in the complex plane. A simple ray optics interpretation is given for the phenomenon, and graphs are presented to easily enable design of printed antenna geometry to achieve nearly omnidirectional \bar{E} - or \bar{H} -plane patterns.