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A compact and uniplanar antenna with broadband characteristics is presented. The novel Yagi-like printed dipole array antenna is fed by a microstrip-to-coplanar strip transition, and uses the truncated microstrip ground plane as its reflecting element. An X-band prototype measures a bandwidth of 17%, with 6.5 dB gain, 18 dB front-to-back ratio, and lower than –15 dB cross-polarisation level at 10 GHz.
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Qian et al. (1998) studied this question.
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