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Log periodic antennas are widely used in EMI/Antenna measurement because of their ultra wideband properties. When designing a planar log-periodic antenna, the feeding method is a main issue. In this paper, a planar log-periodic antenna is fed by a planar Marchand balun. The whole design is illustrated on a PCB without any supporting device. The bandwidth ranges from 1.2 GHz to 3.3 GHz, with maximum...
In this paper, we present a new design of dual-band planar monopole antenna with a symmetric shorted quarter-wavelength resonator. The antenna consists of two elements in order to achieve dual-band operation: one is a stacked T-shaped monopole for the higher band operation, and the other is the grounded parasitic resonator for lower band operation. The antenna is featured by its compact size, simple...
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