![]() Park, I.: Broadband printed-dipole antenna and its arrays for 5G applications. Luk, K.M.: Compact differential-fed dipole antenna with wide bandwidth, stable gain and low cross-polarisation. Kustepeli, A.: Subsectional tapered fed printed LPDA antenna with a feeding point patch. Gao, F.: A wideband dual-band magneto-electric dipole antenna with improved feeding structure. In: 2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2017. ![]() Weller, T.: Wideband Ku-band antennas using multi-layer direct digital manufacturing. Adrian, A.: Effect of microstrip antenna substrate thickness and permittivity: comparison of theories with experiment. ![]() Richards, W.F.: An experimental investigation of electrically thick rectangular microstrip antennas. The proposed antenna may be applied in high-precision radar sensing system.Ĭhang, E. Compared with conventional broadband antennas, the antenna features simple structure and better performance, which achieves broadband with simultaneous flat gain response and filtering characteristic. What is more, an extremely low gain fluctuation of ± 0.464 dBi is realized in the 4–12 GHz. The measured results show that the proposed antenna achieves an impedance bandwidth of 101.9% (3.99–12.28 GHz) and an out-of-band suppression level of 15.5 dBi in the upper stopband. In addition, a bandpass filter is added to the antenna to further equalize the currents amplitude and suppress out-of-band signals. The loaded rectangle slots adjust the phase of the surface currents to widen the operating bandwidth, as well as reduce the far-field radiation cancellation of the reverse currents in the end-fire direction, thus improving the gain. To achieve a flat gain response, rectangle slots and a bandpass filter are loaded on the antipodal Vivaldi antenna. A broadband antenna with simultaneous flat gain and filtering characteristic is proposed in this paper.
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