期刊
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
卷 16, 期 -, 页码 800-803出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LAWP.2016.2604497
关键词
Helical antenna; inkjet printing; lens antenna; three-dimensional (3-D) printing
The gain of an antenna can be enhanced through the integration of a lens, although this technique has traditionally been restricted to planar antennas due to fabrication limitations of standard manufacturing processes. Here, through a unique combination of three-dimensional and two-dimensional inkjet printing of dielectric and metallic inks, respectively, we demonstrate a lens that has been monolithically integrated to a nonplanar antenna (helix) for the first time. Antenna measurements show that the integration of a Fresnel lens enhances the gain of a two-turn helix by around 4.6 dB, which provides a peak gain of about 12.9 dBi at 8.8 GHz. The 3-dB axial-ratio bandwidth of the antenna with the lens is 5.5%. This work also reports the complete characterization of this new process in terms of minimum feature sizes and achievable conductivities. Due to the monolithic integration of the lens through a fully printed process, this antenna configuration offers a high-gain performance by using a low-cost and rapid fabrication technique.
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