A Planar Broadband Complementary Antenna with End-fire Radiation Pattern

In this paper, a planar broadband printed electromagnetic dipole complementary antenna with end-fire radiation pattern is designed. The antenna consists of a segmented loop, planar electric dipole, and microstrip coupling feed structure. The segmented loop effect for magnetic dipole, which have the same radiation intensity and 180° phase difference compared with the printed electric dipole. The simulation results show that the antenna has an end-fire pattern and the maximum front-to-back ratio could achieve 28.9 dB in the frequency band. The antenna has a simple structure and is easy to be fabricated. The measured results show that the proposed antenna achieves an impedance bandwidth of 48.05% (1.66 GHz-2.71 GHz).